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Installation, Start-Up and Service Instructions

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1. o 36 914 Except for NEC requirements REQ D CLEARANCES TO COMBUSTIBLE MAT L in mm Maximum extension of overhangs 48 1219 S UpiIETOD e E a n na leo Sek a ds eR 14 aan Duct side of Unit hs da Je Ge a Ep AOR a Wed Ed ak 2 51 Side opposite ducts oao aoa a a a a 14 356 k11 1 16 Bottom Of UNIE za a eet Se RA oh Pe Geran ae se 281 4 Flue pafiel a Z R ee ke ee A R e 36 914 a VAC c NEC REQ D CLEARANCES in mm Pan SUPPLY Between units control box side 42 1067 y AIR OPENING Unit and ungrounded surfaces control box side 36 914 Unit and block or concrete walls and other grounded surfaces control box side scsi aa ee 42 1067 3 5 16 84 1 1 1747 ALTERNATE pou ENTRY COMPRESSOR ACCESS PANEL 7 8 22 2 DIA 1 1 8 28 6 DIA FLUE HOOD EVAP COIL ACCESS 37 3 CONTROL ENTRY POWER ENTRY ALTERNATE LV ENTR 1 5 8 41 3 DIA GAS ENTRY 1 2 14 NPT FLUE PANEL 3 4 NPT 19 GAS CONNECTION DRAIN OUTLET REAR VIEW RETURN LEFT SIDE VIEW 2 3 16 FRONT VIEW 55 6 OPTIONAL RETURN AIR OPENING 14 7 16 365 9 0 LEGAL UNIT WEIGHT CORNER WEIGHT UNIT HEIGHT UNII CHARACTERISTICS Ib kg nero lb kW a B c D E 4858018040 208 230 1 60 87 40 68 31 82 37 59 27 27 41697 4855024040 208 230 1 60 103 47 49 22 129 59 46 21 27 4 697 4855024060 208 230 1 60 106 48 52 24 132 60 49 22 27 4 6
2. A INNON BLOWER HOUSING X je d SEA C 0 L L LEE P 2 SETSCREWS HIDDEN Fig 36 Removal of Motor and Blower Wheel Fig 37 Burner Rack Removed 46 Condenser Coil Evaporator Coil and Conden sate Drain Pan Inspect the condenser coil evapo rator coil and condensate drain pan at least once each year Proper inspection and cleaning requires the removal of the unit top See Unit Top Removal section on page 45 The coils are easily cleaned when dry therefore inspect and clean the coils either before or after each cooling sea son Remove all obstructions including weeds and shrubs that interfere with the airflow through the condenser coil Straighten bent fins with a fin comb If coated with dirt or lint clean the coils with a vacuum cleaner using the soft brush attachment Be careful not to bend the fins If coated with oil or grease clean the coils with a mild detergent and water solution Rinse coils with clear water using a garden hose Be careful not to splash water on motors insulation wiring or air filter s For best results spray condenser coil fins from inside to outside the unit On units with an outer and inner condenser coil be sure to clean between the coils Be sure to flush all dirt and debris from the unit base Inspect the drain pan and condensate drain line when in specting the coils Clean the drain pan and condensate drain by removin
3. 4 CAUTION All panels must be in place when rigging UNIT MAX 48SS WEIGHT Size mm 018 715 024 715 030 715 036 715 042 816 048 969 060 969 UNIT 48SX 024 816 036 816 042 tS 2 969 048 E 2 969 060 969 Fig 13 Suggested Rigging for Units With Optional Base Rail UNITS WITHOUT BASE RAIL If accessory rigging brackets are to be used for rigging install them as follows 44 WARNING Secure screws and paint protectors solidly against unit basepan to hold lifting brackets in position Never use lifting brackets when the temperature is be low 10 F Never exceed 200 Ibs per bracket of lifting force Never use lifting brackets for lifting other models of air conditioning units Lifting point should be directly over the unit center of gravity 1 Position brackets as close to the corners of unit as pos sible Be sure brackets are well outside of center of grav ity See Fig 2 4 6 8 and 12 2 Position paint protectors and foam strips between screws and painted surface of unit Tighten screws until they make contact with the paint protectors 3 Secure device or hook of sufficient strength to hole in bracket as shown in detail A of Fig 12 4 If wood top is available use it for a spreader bar to pre vent straps from damaging unit If wood top is not avail able use spreader bars of sufficient length UNITS WITH OPTIONAL BASE RAIL Lifting holes are provided in opt
4. c BLK haat YEL OFM MAXIMUM WIRE STEEL YEL as YEL CAP2 a ae a DS ee va 91 l anata RN YEL BLK ai Lu COMP EQUIP GND BLK YEL YEL ZW 230 VOLT OPERATION AS SHOWN FOR 208 036 048 060 VOLT OPERATION REVERSE RED AND ORN RED roe LEADS ON TRANSFORMER EL 042 da fu YEL TT las RN YEL f COOLING FAN LOGIC U 1 vra ee ORN RED FLBLK ED do Gu A IDM D T T 30 TRANI BLU BRN 6 6 ver vio Reo YEL ENERGIZED DE ENERGIZED REDE CO aRN Ra HEATING FAN LOGIC BR e YEL BLK 0 45 T T 30 H BR W BR RED ENERGIZED ENERGIZED DE ENERGIZED DE ENERGIZED WHT GRN RED YEL BRN MAIN FS SINGLE STAGE HEAT SINGLE STAGE 24V SPLICE YEL O ph COOL THERMOSTAT TYP COMMON BOX ORN ofp GRN YEL BRN C k GROUNDED THRU STANDOFF BRN 24V OSS E UA COMPONENT ER ARRANGEMENT BRN LEGEND AWG American Wire Gage QT Quadruple Terminal BR Blower Relay RS Rollout Switch C Contactor RT Red Terminal Di CAP Capacitor TRAN Transformer A emare COMP Compresadr Motor SIS 0 C Combustion Relay le plice 1 EQUIP Equipment Le FL Fuse Link A FS Flame Sensor lt x gt Terminal Marked GAS SECTION GN See O Terminal Unmarked fs Bi GVR Gas Valve Relay i HS Hall Effect Sensor 0 Splice RE G 3p High Ye wal L TRAN ene Transformer Ds Splice Marked B y ss IDM Induced Draft Motor Factory Wirin m oD oP RS IFM Indoor Fan Motor
5. 1540 1470 1430 1360 1300 1220 1120 ENE aro A E OS pom 1780 1670 1600 1480 1340 Wars 1050 1000 970 930 87 3 sto 750 es0 600 a tow RR es 1750 000 1600 1600 y wars 1050 1000 oso 870 sio 740 cm 2000 1940 1850 1750 16835 1500 1300 High Air delivery values are without air filter and are for dry coil See Table 17 for wet coil pressure drop Deduct field supplied air filter pressure drop and wet coil pressure drop to obtain external static pressure available for ducting TUnit air delivery is outside of operating range For 460 v units only Table 15 Dry Coil Air Delivery Heating Horizontal and Downflow Discharge for Integrated Control Motor Units at 230 V Deduct 10 from Cfm for 208 V Operation HEATING INPUT Btuh 80 000 100 000 EASY SELECT BOARD TERMINALS Cfm E A ee 00 1600 aso ieo 136 000 1780 Air delivery values are for dry coil at 230 v Airflow is independent of external static pressure within 5 of table values up to 0 8 in wg NOTES 1 Dashed areas do not fall within approved range 2 The above values occur with the AC HP CFM ADJUST select jumper set on MED 3 Airflow can be adjusted 10 or 10 by selecting HI or LO for all nodes except FAN ONLY Cfm 1 oe 1 1 p 1 fS Watts 43
6. 6 to 8 90 100 Example Supply voltage is 460 3 60 AB 452 v v tBS E BC 464 v AC 455 v Average Voltage E 1371 3 457 Determine maximum deviation from average voltage AB 457 452 5 v BC 464 457 7 v AC 457 455 2 v Maximum deviation is 7 v Determine percent of voltage imbalance Voltage Imbalance 100 x ed 457 1 53 This amount of phase imbalance is satisfactory as it is below the maximum allowable 2 IMPORTANT If the supply voltage phase imbalance is more than 2 contact your local electric utility company immediately Table 4B Electrical Data Unit 48SX UNIT VOLTAGE OUTDOOR FAN INDOOR FAN AWG 60 C SIZE V PH Hz RANGE COMPRESSOR MOTOR MOTOR POWER SUPPLY MIN WIRE NEE 48SX Min Max RLA LRA FLA SIZE 024 208 230 1 60 625 14 30 12 75 030 208 230 1 60 76 0 1 4 30 10 100 208 230 1 60 95 0 1 4 30 10 95 036 208 230 3 60 187 253 10 9 75 0 1 4 2 8 17 8 25 12 70 460 3 60 414 506 5 4 40 0 1 4 9 0 10 14 100 208 230 1 60 104 0 1 4 45 10 80 042 208 230 3 60 88 0 14 30 10 60 460 3 60 414 506 6 8 44 0 0 8 1 6 10 9 15 14 100 208 230 1 60 187 253 26 4 129 0 7 2 41 6 60 6 100 048 208 230 3 60 99 0 1 4 40 10 70 460 3 60 49 5 0 8 20 14 100 oso 208 230 1 60 169 0 2 1 72 44 e 6 1 208 230 3 60 123 0 21 30 Example Supply voltage is 460 3 60 LEGEND AWG American Wire Gage A BC fe a 22 FLA Full Load Amps U AC 45
7. Use extreme caution when removing panels and parts As with any mechanical equipment personal injury can result from sharp edges etc Never place anything combustible either on or in con tact with the unit Should overheating occur or the gas supply fail to shut off shut off the external main manual gas valve to the unit then shut off the electrical supply 4 CAUTION Errors made when reconnecting wires may cause im proper and dangerous operation Label all wires prior to disconnection when servicing The minimum maintenance requirements for this equip ment are as follows 1 Inspect air filter s each month Clean or replace when necessary 2 Inspect indoor coil drain pan and condensate drain each cooling season for cleanliness Clean when necessary 3 Inspect blower motor and wheel for cleanliness and check lubrication each heating and cooling season Clean and lubricate if required when necessary For first heating season inspect blower wheel bimonthly to determine proper cleaning frequency 4 Check electrical connections for tightness and controls for proper operation each heating and cooling season Serv ice when necessary 5 Check and inspect heating section before each heating sea son Clean and adjust when necessary 6 Check flue hood screen and remove any obstructions if necessary 7 Check vent screen and clean if necessary Air Filter 4 CAUTION Never operate the unit without a
8. 136 136 151 166 180 185 189 193 194 195 es SPH 101 101 101 101 nz 134 160 168 165 173 181 190 90 SPH 65 6s 6s 6s 88s 1 2 135 146 157 16 8 17 2 176 A EA A a e ja a 102 162162 joo SPH gt 60 er 14 141 149 156 EY IC GRC GSE A O E A A A E 110 seH gt f gt A T gt A A gt gt f gt EAS TAE eS CSC Ce a OGL LEGEND Do not attempt to charge system under these conditions refrig Ewb Entering Wet Bulb erant slugging may occur SPH Superheat at Compressor F W 9 Table 9D Superheat Charging Table 485X042 EVAP AIR CFM TEMP F 1400 AIR ENT S COND Evap Air Ewb F sa s 58 60 62 64 66 68 70 76 6 SPH 239 239 239 239 244 249 255 258 267 265 258 247 70 SPH 219 219 219 219 224 229 234 287 241 245 240 235 75 SPH 198 198 198 198 203 208 213 217 220 224 224 224 so SPH 163 163 163 163 179 196 213 215 217 218 218 218 e5 SPH 127 127 127 127 156 184 213 213 213 213 213 213 90 SPH 92 92 92 92 120 149 178 187 197 208 208 208 95 SPH 56 56 56 56 85 13 142 162 182 202 202 202 100 SPH gt gt gt gt gt 80 106 131 156 181 189 196 105 H H HHE et Ota ted 18 ER no j sm gt AA ws C T I AZO m SPH
9. 1380 1300 1200 575 650 614 540 510 480 1560 1500 1380 1280 11 2 1060 150 ojo Slo oo Hol le a e a a a a A 2 2 2 Si4 4 4 4 810 740 NOTE Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12 000 Btuh of rated cooling capacity Evaporator coil icing may occur at airflows below this point Water blow off may occur at airflows above 450 cfm per 12 000 Btuh of rated cooling capacity Table 16 Dry Coil Air Delivery Fan Only and Cooling Horizontal and Downflow Discharge for Integrated Control Motor Units at 230 V Deduct 10 from Cfm for 208 V Operation UNIT 48SX FAN ONLY Cfm COOLING Cfm 048 1400 1600 060 1750 2000 Air delivery values are for dry coil at 230 v Airflow is independent of external static pressure within 5 of table values up to 0 8 in wg NOTE Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12 000 Btuh of rated cooling capacity Evaporator coil icing may occur at airflows below this point Water blow off may occur at airflows above 450 cfm per 12 000 Btuh of rated cooling capacity Table 17 Wet Coil Pressure Drop UNIT SIZE rio a eo 0 069 0 082 sd 0 102 900 0 116 0 058 024 800 0 075 o 0 088 900 0 088 030 0 095 0 123 0 068 0 088 a 0 108 1600 0 123 0 069 S 0 088 1600 0 102 048 0 075 0 088 0 082 0 095 id 0 108 0 123 Unit 48SS only COOLING SEQUENCE OF OPERATI
10. 190 190 190 190 217 243 260 27 7 279 282 284 28 6 70 SPH 154 154 164 154 181 208 225 241 251 261 271 281 z SPH no no 119 mo 148 172 189 206 223 240 258 275 so sph 84 s4 84 84 no 187 154 170 195 220 245 270 es SPH 50 50 50 50 75 101 m8 135 167 200 202 264 0 sea pe gt 66 90 4 147 as 211 21 88 seH gt gt J gt Rea gt e2 94 126 159 191 223 w HE H GP RE RI GT ONS WR E ERA EE E SR a A A A E 110 sPH A A A A ols f s f o o gt o f es f ne Mis 19 8 00 2600 50 00 00 00001 00000 200 0005 a A A E LEGEND Do not attempt to charge system under these conditions refrig Ewb Entering Wet Bulb erant slugging may occur SPH Superheat at Compressor F Table 8H Superheat Charging Table 4855060 EVAP AIR CFM AIR ENT 1995 COND Evap Air Ewb F 76 a s eoa 6 66 687 65 SPH_ 201 201 201 20 1 201 201 226 252 25 6 261 266 270 70 sm 165 165 165 165 173 180 206 231 240 248 256 265 75 sm 130 130 130 130 145 160 185 211 223 285 247 258 80 SPH 109 109 109 109 124 139 165 190 206 222 258 254 es SPH s9 89 89 89 104 119 144 170 189 209 229 249 90 SPH 69 69 69 69 84 99 124 149 173 196 220 243 95 so 50 50
11. 50 63 78 103 129 156 183 211 238 w0 sen H ZS RT RE T OI 105 SPH ff a 62 88 123 157 192 227 US em A e ee o eae s seH gt gt T gt doo d t T ES d ee na 174 218 LEGEND Do not attempt to charge system under these conditions refrig Ewb Entering Wet Bulb erant slugging may occur SPH Superheat at Compressor F Table 9A Superheat Charging Table 48SX024 EVAP AIR CFM TEMP F 800 AIR ENT COND Evap Air Ewb F s s ss 0 6 66 68 70 72 73 7 SPH 221 221 28 22 23 274 205 208 302 305 313 321 70 SPH 185 189 193 196 222 248 275 283 291 30 0 30 0 30 0 75_ SPH 150 154 157 161 192 223 264 267 281 294 287 280 so SPH 92 95 97 99 144 189 233 247 260 273 274 274 85 SPH 96 155 213 226 240 253 261 268 o sm 72 125 178 201 24 248 261 255 sm gt 94 142 175 209 242 242 242 100 SPH gt gt 71 106 145 183 221 229 23 6 105 2 lt SPHE PEDO OE a ee A 20 A ear mo sPpH_ A gt _ 84 132 teo0 195 210 MS Se eee ae ee fet eer e tor OA EA Se LEGEND Do not attempt to charge system under these conditions refrig Ewb Entering Wet Bulb erant slugging may occur SPH Superheat at Compressor F Table 9
12. 79 81 ie e See Ea a BES Be E E 32 67 69 71 73 75 77 79 81 83 87 38 59 a AR a es e es 9 Temperature at suction service valve Table 11 Dry Coil Air Delivery Horizontal Discharge at 230 and 460 V Unit 48SS E ee ee Deduct 10 from Cfm and Wa tts for 208 V Operation EXTERNAL STATIC PRESSURE in wg UNIT MOTOR AIR 48ss SPEED DELIVERY oo 01 02 03 pu o CALLA 98 98 en Cee IEA Cfm 850 700 450 1 T om 857 885 502 782 705 717 663 t_ 024 ses s 326 319 030 Cfm 1079 1063 1027 Watts 514 493 476 460 High om 1258 1253 1172 1130 1047 046 685 829 768 y mon Mars o 634 609 sos 564 sai soe 469 86 a27 ne 1375 1280 TE 700 680 i 1610 152 1355 1215 919 783 726 t 443 425 401 378 344 t 550 520 455 430 048 t t 2026 1905 E w O 0 EI e d ea t IZ t es h em t t 202 1005 e 1603 1398 744 706 641 606 557 511 1830 1752 1603 1513 1367 1228 A P 4 4 414 4 4 4 414 P P HS E 697 See se e re e er ee ee e 1264 pe 812 1405 son Wats estas 1296 1247 nor 1128 1087 1002 936 1441 Air delivery values are without air filter and are for dry coil See Table 17 for wet coil pressure drop Deduct field supplied air filter pressure drop and wet coil pressure drop to obtain external static pressure available for ducti
13. Direct Drive Nominal Airflow Cfm 1400 1400 1400 1400 1600 1600 1600 1600 1995 1995 1995 1995 Size in 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10 FURNACE SECTIONt Burner Orifice Qty drill size 3 32 Natural Gas dd Burner Orifice Qty drill size 3 40 Propane Gas RETURN AIR FILTERS in Disposable 24x30 24x30 24x30 24x30 24x30 24x30 24x30 816tt 24x30 24 x30 24 x 30 960tt Size 048 evaporator fan is equipped equipped with an ICM only The ICM Based on an altitude of 0 2000 feet with a 460 v or integrated control motor ICM Size 060 evaporator fan is provides variable speed Required filter sizes shown are based on the ARI Air Conditioning amp Refrigeration Institute rated heating airflow at a velocity of 300 ft min for throwaway type or 450 ft min for high capacity type For non standard air filters air filter pressure drop must not exceed 0 08 in wg ttSq inch Filter is mounted external to unit 15 Text continued from page 13 A CAUTION Unstable operation may occur when the gas valve and manifold assembly are forced out of position while connecting improperly routed rigid gas piping to the gas valve Use a backup wrench when making con nection to avoid strain on or distortion of the gas control piping A CAUTION If a flexible conductor is required or allowed by the authority having jurisdiction black iron pipe shall
14. REQ D CLEARANCES TO COMBUSTIBLE MAT in mm lll spek Maximum extension of overhangs o a a s a a a 48 1219 7 113716 A NOOR ct sas ee sh gus a R 40 gE ota gee ey Ae oe a ta Se Ra 14 356 111716 46 2 Duct side of unit 2 sh a BO eR a e Re ce h 2 51 aes SL 43 2 Side opposite ducts o 14 356 E RA a e N A eee WE See tot 5 0 E a17 1 16 PIS POL AAA E RA A 36 914 L 433 9 NEC REQ D CLEARANCES in mm OPTIONAL SUPPLY Between units control box side 42 1067 Unit and ungrounded surfaces control box side 36 914 Unit and block or concrete walls and other grounded surfaces control box side o o oaoa a a 02 0 2 0040 42 1067 O 7 8 22 23 1 1 4 31 75 ALTERNATE LV ENTRY ALTERNATE POWER ENTRY COMPRESSOR ACCESS PANEL 7 8 22 2 DIA 1 1 8 28 6 DIA EVAR COIL ACCESS CONTROL ENTRY POWER ENTRY FLUE HOOD 1 5 8 41 3 DIA 2 sast C GAS ENTRY 58 0 S ees L G y 0 174 14 NPT a GAS CONNECTION LA R 282 1 42 13 16 FLUE PANEL rey 325 4 REAR VIEW LEFT SIDE VIEW FRONT VIEW ELECTRICAL UNIT WEIGHT CORNER WEIGHT UNIT HEIGHT UNIT CHARACTERISTICS es Co b kW a B c D E 4855180040 208 230 1 60 81 37 62 28 76 35 53 24 24 1 613 4855024040 208 230 1 60 97 44 43 20 123 56 40 18 24 1 613 4855024060 208 230 1 60 100 45 46 21 126 57 43 20 24 1 613 4855030040 24 17613 48550300607080 2411613 28550360607080 24 17613 485503610
15. See Table 7 for error codes Table 7 LED Indications ERROR CODE LED INDICATION Normal Operation On Hardware Failure Off Fan On Off Delay Modified 1 Flash Limit Switch Fault 2 Flashes Flame Sense Fault 3 Flashes Four Consecutive Limit Switch Faults 4 Flashes Ignition Lockout Fault 5 Flashes Induced Draft Motor Fault 6 Flashes Rollout Switch Fault 7 Flashes Internal Control Fault 8 Flashes NOTES 1 There is a 3 second pause between error code displays 2 If more than one error code exists all applicable error codes will be displayed in numerical sequence 3 This chart is on the wiring diagram located inside the burner ac cess panel LIMIT SWITCHES Normally closed limit switch LS completes the control circuit through the thermostat R cir cuit Should the leaving air temperature rise above the maxi mum allowable temperature the limit switch opens and the R control circuit breaks Any interruption in the R control circuit instantly closes the gas valve and stops gas flow to the burners and pilot The blower motor continues to run un til LS resets When the air temperature at the limit switch drops to the low temperature setting of the limit switch the switch closes and completes the R control circuit The electric spark ig nition system cycles and the unit returns to normal heating operation AUXILIARY LIMIT SWITCH ROLLOUT The func tion of the switch is to close the main gas valve in the
16. Temperature table compare desired superheat temperature with suction low side operating pressure psig to determine proper suction tube temperature See Table 10 7 Compare actual suction tube temperature with proper suction tube temperature Using a tolerance of 3 E add refrigerant if actual temperature is more than 3 F higher than proper suction tube temperature or remove refrig erant if actual temperature is more than 3 F lower than required suction tube temperature NOTE If the problem causing the inaccurate readings is a refrigerant leak refer to Check for Refrigerant Leaks sec tion on page 23 35 EVAPORATOR AIRFLOW AND AIRFLOW ADJUSTMENTS 4 CAUTION For cooling operation the recommended airflow is 350 to 450 cfm for each 12 000 Btuh of rated cooling ca pacity For heating operation the airflow must produce a temperature rise that falls within the range stamped on the unit rating plate Table 6 shows the temperature rise at various airflow rates Tables 11 14 show both heating and cooling airflows at vari ous external static pressures See Tables 15 and 16 for ICM Integrated Control Motor units air delivery Refer to these tables to determine the airflow for the system being in stalled See Table 17 for wet coil pressure drop NOTE Be sure that all supply and return air grilles are open free from obstructions and adjusted properly 44 WARNING Shut off gas supply then disconnect el
17. Thoroughly clean all accumulations of dirt or grease from motor housing b Remove dust caps or plugs from oil ports located at each end of motor c Use a good grade of SAE 20 nondetergent motor oil and put one teaspoon 16 oz or 16 to 25 drops in each oil port d Allow time for oil to be absorbed by each bearing then wipe excess oil from motor housing e Replace dust caps or plugs in oil ports 3 Remove and clean blower wheel as follows a Ensure proper reassembly by marking wheel orientation b Lift wheel from housing When handling and or clean ing blower wheel be sure not to disturb balance weights clips on blower wheel vanes c Remove caked on dirt from wheel and housing with a brush Remove lint and or dirt accumulations from wheel and housing with vacuum cleaner using soft brush at tachment Remove grease and oil with mild solvent d Reassemble wheel into housing e Reassemble motor into housing Be sure setscrews are tightened on motor shaft flats and not on round part of shaft f Reinstall blower access door 4 Restore electrical power then gas supply to unit Start unit and check for proper blower rotation and motor speeds during heating and cooling cycles Flue Gas Passageways To inspect the flue col lector box and upper areas of the heat exchanger 1 Remove the combustion blower wheel and motor assem bly according to directions in Combustion Air Blower sec tion on page 46 2
18. be installed at the gas valve and shall extend a mini mum of 2 in outside the unit casing A WARNING Never use a match or other open flame when check ing for gas leaks Never purge gas line into com bustion chamber Failure to follow this warning could result in an explosion causing personal injury or death 8 Check for gas leaks at the field installed and factory installed gas lines after all piping connections have been completed Use soap and water solution or method speci fied by local codes and or regulations IN TEE OUT NIPPLE CAP Fig 15 Sediment Trap Step 9 Install Duct Connections The unit has duct flanges on the supply and return air openings on the side and bottom of the unit See Fig 2 9 for connection sizes and locations 16 CONFIGURING UNITS FOR DOWNFLOW VERTICAL DISCHARGE A WARNING Before performing service or maintenance operations on the system turn off main power to unit or electrical shock could result 10 Open all electrical disconnects before starting any serv ice work Remove return duct cover located on duct panel Figure 16 shows duct cover removed Save duct cover and screws Locate lances in basepan insulation that are placed over the perimeter of the vertical duct opening cover Fig 17 Using a straight edge and sharp knife cut and remove the insulation around the perimeter of the cover Re move and save 5 scr
19. 3 When using an auto changeover room thermostat place both SYSTEM and FAN switches in AUTO positions Observe that unit operates in heating mode when tem perature control is set to call for heating above room temperature and operates in cooling mode when tem perature control is set to call for cooling below room temperature IMPORTANT Three phase scroll compressor units 48SS048 060 and 48SX036 060 are direction oriented These units must be checked to ensure proper com pressor 3 phase power lead orientation If not cor rected within 5 minutes the internal protector will shut off the compressor The 3 phase power leads to the unit must be reversed to correct rotation When turning back wards scroll compressors emit elevated noise levels and the difference between compressor suction and dis charge pressures may be dramatically lower than normal Text continued on page 35 N BR N BR ENERGIZED ENERGIZED DE ENERGIZED DE ENERGIZED SINGLE STAGE HEAT amp SINGLE STAGE 24V SPLICE BO FILO ogy OFM MAXIMUM WIRE J SUPPLY G veL SIZE 2 AWG POWER YEL tt EQUIP GND COMP CH ACCESORY ONLY 230 VOLT OPERATION AS SHOWN FOR 208 018 024 036 042 048 060 aa 024 036 042 VOLT OPERATION REVERSE RED AND ORN BLUE LEADS ON TRANSFORMER tem ONLY ON 3 SPEED HOTORS GRN YEL ft COOLING FAN LOGIC BR 6 T T 30 ba ENERGIZED DE ENERGIZED BRN C HEATING FAN LOGIC BR o 45 T T
20. 30 MAIN COOL THERMOSTAT TYP COMMON 24v TRAN LEGEND American Wire Gage PWR Power l Blower Relay QT Quadruple Terminal Contactor RS Rollout Switch Capacitor TRAN Transformer Crankcase Heater l Compressor Motor LA Field Splice com ustion Relay Fuse tink lt gt Terminal Marked Flame Sensor FU Fuse O Terminal Unmarked GAS SECTION GND Ground Aso B GVR Gas Valve Relay O Splice AS HV TRAN High Voltage Transi High Voltage Transformer Splice Marked S l Ignitor D gt PIS S NG de Motor Factory Wiring Indoor Fan Motor i irj on nisa l i Integrated Gas Control REYR E oe Internal Protector m e m m OD G 9 kimit Switch i Accessory or Optional Wiring O ter En Ve To Indicate Common Potential NEC National Electrical Code e iri CAP 182 OFM Outdoor Fan Motor Only Not to Represent Wiring NOTES ds If any of the original wire furnished must be replaced it must be replaced with type 90 C wire or its equivalent 2 Use copper conductors only Fig 26 208 230 1 60 Wiring Diagram Units 48SS018 060 27 BLK Ra c BLK e Scie vet OFM MAXIMUM WIRE SURELY ame o YEL YEL CAP2 SIZE 2 ANG fo srN POWER mo Tey oT N YEL ft BLK n COMP EQUIP GND ca E S Sa oa CH 036 amp 042 ONLY 230 VOLT OPERATION AS SHOWN FOR 208 036 042 048 050 VOLT OPERATION REVERS
21. 380 0 LV Low Voltage REQ D Required 48SX024060 26 51 673 3 20 22 513 6 14 96 380 0 463X030040 2090 6933 EAST H T must be maintained to prevent recirculation of air from outdoor 485X030060 080 26 83 681 5 21 11 536 2 14 96 380 0 fan discharge x 48SX036060 080 26 99 685 5 21 14 537 0 14 96 380 0 2 Adequate clearance around air openings into combustion chamber must 48SX036100 120 26 92 683 8 21 14 537 0 14 96 380 0 be provided Fig 7 48SX024 036 With Optional Base Rail Unit Dimensions IM IM J 12 R BLOWER ACCESS PANEL BURNER AND CONTROL BOX ACCESS PANEL RIGHT SIDE VIEW REQ D CLEARANCES FOR SERVICING in mm Du t panel ue id o te RC E a er oe ct a ee ae ee 0 WNP TOPs ood Ee e A ah ae Car adi E Ta pe Gh 6 9 Cel And 36 914 Side opposite ducts 000 36 914 Compressor access o 0000004 36 914 Except for NEC requirements REQ D CLEARANCES TO COMBUSTIBLE MAT L in mm Maximum extension of overhangs 2 8 1219 WNIHOP is rater erie Ga ete a AS pe we dad ay ae a cal DISESIOS OT UTE se a ha ee ne A ae Re ws wl A 2 51 Side opposite ducts 0004 14 356 Bottom of Unit o s ee ile pe Be RE kn hae a ee TR MTA h oh ode oa 0 PIG panal P auien Nee OO TIA AA By Plath ae re 36 914 NEC REQ D CLEARANCES in mm Between units control box side o a oaoa a 42 1067 Unit and ungrounded surfaces control
22. 66 68 70 76 65 SPH 201 207 207 201 201 201 226 252 256 261 266 270 70 SPH 165 165 165 165 173 180 206 231 240 248 256 265 75 SPH 130 130 130 130 145 160 185 211 223 235 247 259 so SPH 109 109 109 109 124 139 165 190 206 222 238 254 a5 SPH 89 89 89 89 104 119 144 170 189 209 229 249 90 SPH 69 69 69 69 84 99 124 149 173 196 220 243 SPH 50 50 50 50 63 78 103 129 156 183 211 238 100 sm 58 83 108 139 170 201 232 105 SPH 62 88 123 157 192 227 no sn 67 106 144 183 222 ns Te RE RS A A A A T LEGEND Ewb Entering Wet Bulb SPH Superheat at Compressor F Do not attempt to charge system under these conditions refrig erant slugging may occur SUPERHEAT TeMP F es oaz eri 700 730 760 792 24 07 4 47 0 Table 10 Required Suction Tube Temperature F SUCTION PRESSURE AT SERVICE PORT psig 51 e yz os ajas s ay w 2 37 39 41 43 45 47 49 51 53 6 57 8 59 10 61 12 63 1149 a 11 s 57 s a e e 16 67 18 69 20 55 57 a 6 s 6 r 6 7 5 5 61 6 5 67 71 73 5 a Sa 6 es 6 69 7 24 59 61 63 65 67 69 71 73 75 e s yg o A le 7
23. BR o 45 T 1 30 N BR N BR ENERGIZED ENERGIZED DE ENERGIZED DE ENERGIZED SINGLE STAGE HEAT amp SINGLE STAGE COOL THERMOSTAT TYP ALTERNATE COMPONENT 048 TO BLU 2 060 TO BLU 4 ay GRA COCA a Fl ICM BOAR LEGEND e P E l AWG American Wire Gage PWR Power BR Blower Relay QT Quadruple Terminal C Contactor RS Rollout Switch CAP Capacitor SEC Secondary COMP Compressor Motor TRAN Transformer EF ip Com ustion Relay Foden Equipment ie plice FL Fuse Link i SAS SECTION FS Flame Sensor ie ip FU Fuse 2 lt x gt Terminal Marked ES Groun oS GE GVR Gas Valve Relay O Terminal Unmarked eam ay rs HS Hall Effect Sensor O Spice S 1 tr po TRAN miga voltage Transformer Ignitor ICM Integrated Control Motor lt gt Splice Marked IDM nauce Draft Motor Factory Wiring Indoor Fan Motor i ii BIG cape IGC Integrated Gas Control A da able LS Limit Switch e OS ds NOTES MGV Main Gas Valve Accessory or Optional Wiring 1 If any of the original wire furnished must be replaced it must be NEC National Electrical Code ma TO Indicate Common Potential replaced with type 90 C wire or its equivalent OFM Outdoor Fan Motor Only Not to Represent Wiring 2 Use copper conductors only Fig 30 208 230 1 60 Wiring Diagram Units 485X048 060 31 BLK EEP FP a AAA
24. Blower Relay QT Quadruple Terminal C Contactor RS Rollout Switch ws CAP Capacitor RT Red Terminal Lente COMP Compressor Motor ST Start Thermistor E ONNEC SD S usnon Pelay TRAN Transformer Discharge Thermostat EQUIP Equipment ZA Field Splice FL Fuse Link FS Flame Sensor lt A gt Terminal Marked FU Fuse i GND Ground O Terminal Unmarked GVR Gas Valve Relay Spli HS a Hall Effect Sensor plice High Voltage Transformer I Ignitor lt gt Splice Marked IDM Induced Draft Motor Factory Wirin IFM Indoor Fan Motor Field Hs ra c IGC Integrated Gas Control ses Held Gontro Wiring LS Limit Switch eee Field Power Wiring CAP 2 CAP 1 00D MoV Main Gas Valva ei Accessory or Optional Wiring National Electrical Code To Indicate Common Potential NOTES OFM Outdoor Fan Motor m Only Not to Represent Wiring 1 If any of the original wire furnished must be replaced it must be replaced with type 90 C wire or its equivalent 2 Use copper conductors only Fig 29 208 230 1 60 Wiring Diagram Units 48SX024 042 30 Fie a re AAA BLK MAXIMUM WIRE SPAY a E YEL SIZE 2 AWG MR a EQUIP GND T BLK BLK ak YEL OFM N GRN YEL h 230 VOLT OPERATION AS SHOWN FOR 208 VOLT OPERATION REVERSE RED AND ORN LEADS ON TRANSFORMER COOLING FAN LOGIC BR 0 T T 30 6 6 C ENERGIZED DE ENERGIZED HEATING FAN LOGIC
25. Remove the 3 screws holding the blower housing to the flue collector box cover see Fig 34 3 Remove the 12 screws holding the flue collector box cover Fig 34 to the heat exchanger assembly Inspect the heat exchangers 4 Clean all surfaces as required using the wire brush FLUE COLLECTOR BOX INDUCED DRAFT MOTOR MOUNTING PLATE BLOWER HOUSING BURNER RACK MOUNTING SCREW Fig 34 Blower Housing and Flue Collector Box Combustion Air Blower Clean periodically to as 5 To remove motor remove 4 screws that hold blower hous sure proper airflow and heating efficiency Inspect blower ing to mounting plate Remove the motor cooling fan by wheel every fall and periodically during heating season For removing one setscrew Remove nuts that hold motor to the first heating season inspect blower wheel bimonthly to mounting plate determine proper cleaning frequency 6 To reinstall reverse the procedure outlined above To inspect blower wheel remove draft hood assembly Shine a flashlight into opening to inspect wheel If cleaning is re quired remove motor and wheel as follows Limit Switch Remove blower panel Limit switch is located on the gas partition 1 Remove burner access panel See Fig 35 Burner Ignition Unit is equipped with a direct spark 2 Remove the 7 screws that attach induced draft motor mount ignition 100 lockout system Ignition module
26. a Or ie A A LEGEND Ewb Entering Wet Bulb SPH Superheat at Compressor F Table 9E Sup Do not attempt to charge system under these conditions refrig erant slugging may occur erheat Charging Table 48SX048 EVAP AIR CFM TEMP AIR ENT 1600 COND Evap Air Ewb F sa s 58 60 62 6 66 68 70 76 6 SPH 272 272 272 272 270 267 265 260 256 251 245 240 70 SPH 250 250 250 250 248 246 245 245 245 246 238 231 75 SPH 228 228 228 228 227 225 224 229 235 240 231 222 80 SPH 206 206 206 206 205 204 203 214 224 235 224 214 8s SPH 183 183 183 183 183 183 183 198 214 229 218 206 90 SPH 133 133 133 133 142 152 163 178 193 209 204 199 95 SPH s2 82 82 82 102 122 142 187 173 188 190 192 100 sm gt gt l 63 84 ws 129 152 175 181 187 CEA Pet E DO i A NO A A H T no SPH 71 105 140 153 166 ges EE A PALIO A in E ERA PAE A LO EA EA MESS LEGEND Do not attempt to charge system under these conditions refrig Ewb Entering Wet Bulb SPH Superheat at Compressor F erant slugging may occur Table 9F Superheat Charging Table 48SX060 EVAP AIR CFM TEMP AIR ENT 1993 COND Evap Air Ewb F sa s s 60 62 64
27. box side 36 914 Unit and block or concrete walls and other grounded surfaces control box Side o o oa a a a 0 2 1067 7 8 22 2 DIA 1 1 8 28 6 DIA CONTROL ENTRY POWER ENTRY FLUE HOOD 458 8 28 15 16 734 9 1 5 8 41 3 DIA ENTRY NP GAS CONNECTION FLUE PANEL REAR VIEW ELECTRICAL UNIT CHARACTERISTICS 485X042060 080 485X042100 120 48SX048080 48SX048100 120 140 48SX060080 EVAP COIL ACCESS UNIT WEIGHT Qs A se c 2087250 1 60 208 230 3 50 480 3 00 391 178 10045 9141 12085 208 230 1 60 208 230 9 60 460 3 60 408 183 108 47 9443 123 56 YA COND COIL 43 11 16 1108 8 EVAP COIL OPTIONAL RETURN S AIR OPENING RETURN 49 9 1259 3 14 7 16 365 9 La 1 16 6 A B 1 4 209 6 o 9352 281 4 17 1 16 433 9 OPTIONAL SUPPLY AIR OPENING 1 4 31 8 DIA ALTERNATE POWER ENTRY 7 8 22 2 DIA ALTERNATE LV ENTRY COMPRESSOR ACCESS PANEL 3 4 NPT 19 0 DRAIN OUTLET 11 1 27 292 1 LEFT SIDE VIEW FRONT VIEW CORNER WEIGHT Ib kg 76 35 48SX060100 120 140 CENTER OF GRAVITY in mm ais EA a 48SX042060 080 15 35 390 48SX042100 120 15 35 390 48SX048080 15 35 390 48SX048100 120 140 15 35 390 48SX060080 15 35 390 48SX060100 120 140 15 35 390 208 230 1 60 208 230 3 60 453 206 117 53 93 42 167 76 208 230 1 60 2
28. cooling air flow does not require checking unless improper perfor mance is suspected Ifa problem exists be sure that all supply and return air grilles are open and free from obstructions and that the air filter is clean When necessary refer to Evapo rator Airflow and Airflow Adjustments section on page 35 to check the system airflow Metering Device Acutrol Device This me tering device is a fixed orifice and is located in the header to the evaporator coil Liquid Line Strainer The liquid line strainer to pro tect metering device is made of wire mesh and located in the liquid line on the inlet side of the metering device SYMPTOM Compressor and condenser fan will not start Compressor will not start but condenser fan runs Three phase scroll compressor Units 48SS048 060 and 48SX036 060 only makes excessive noise and there may be a low pres sure differential Compressor cycles other than normally satisfying thermostat Compressor operates continuously Excessive head pressure Head pressure too low TROUBLESHOOTING Cooling CAUSE Power failure Fuse blown or circuit breaker tripped Defective thermostat contactor transformer or control relay REMEDY Call power company Replace fuse or reset circuit breaker Replace component Insufficient line voltage Incorrect or faulty wiring Thermostat setting too high Faulty wiring or loose connections in compressor c
29. restrip the wire end and reassemble the connection properly and securely After inspecting the electrical controls and wiring re place all the panels Start the unit and observe at least one complete heating cycle and one complete cooling cycle to ensure proper operation If discrepancies are observed in ei ther or both operating cycles or if a suspected malfunction has occurred check each electrical component with the proper electrical instrumentation Refer to the unit wiring label when making these checkouts NOTE Refer to the heating and or cooling sequence of op eration in this publication as an aid in determining proper control operation Refrigerant Circuit Inspect all refrigerant tubing con nections and the unit base for oil accumulations annually Detecting oil generally indicates a refrigerant leak If oil is detected or if low cooling performance is sus pected leak test all refrigerant tubing using an electronic leak detector halide torch or liquid soap solution If a refriger ant leak is detected refer to Check for Refrigerant Leaks section on page 23 If no refrigerant leaks are found and low cooling perfor mance is suspected refer to Checking and Adjusting Refrig erant Charge section on page 35 Gas Input The gas input does not require checking unless improper heating performance is suspected If a prob lem exists refer to Start Up section on page 23 Evaporator Airflow The heating and or
30. suitable air filter in the return air duct system Always replace the filter with the same dimensional size and type as originally installed See Tables 1 and 2 for recommended filter sizes Inspect air filter s at least once each month and replace throwaway type or clean cleanable type at least twice dur ing each heating and cooling season or whenever the filter s becomes clogged with dust and lint Unit Top Removal NOTE When performing maintenance or service proce dures that require removal of the unit top be sure to perform all of the routine maintenance procedures that require top removal including inspection of the heat exchanger area coil inspection and cleaning and condensate drain pan in spection and cleaning Only qualified service personnel should perform mainte nance and service procedures that require unit top removal Refer to the following top removal procedures 1 Turn off gas supply then turn off electric power to unit 2 Remove all screws that secure unit top including screws around 4 sides and those on top that screw into internal divider panels Save all screws 3 Lift top from unit carefully Set top on edge 4 Carefully replace and secure unit top to unit using screws removed in Step 2 when maintenance and or service pro cedures are completed Be sure to use original screws that have rubber washers to seal out water when securing top to internal divider panels Evaporator Blowe
31. this product 44 WARNING Before performing service or maintenance operations on unit turn off gas supply then unit main power switch Electrical shock could cause personal injury General The 48SS SX units see Fig 1 are fully self contained combination Category I gas heating electric cool ing units designed for outdoor installation See Fig 2 9 pages 2 9 for unit dimensions All unit sizes have dis charge openings for both horizontal and downflow configu rations and are factory shipped with all 4 duct openings covered Units may be installed either on a rooftop or a ground level cement slab See Fig 10 for roof curb dimensions Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 564 955 Book 1 4 PC 111 Tab taj6a Printed in U S A Form 48SS SX 10SI Pg 1 1 97 Replaces 48SS SX 8SI 43 11 16 1108 8 EVAP COIL OPTIONAL RETURN AIR OPENING BLOWER ACCESS BURNER AND CONTROL BOX PANEL RIGHT SIDE VIEW ACCESS PANEL 49 9 16 RETURN 1259 3 amp Lane REQ D CLEARANCES FOR SERVICING in mm 36579 Duet Panel ae Rre fae oy Se a ar ae oe Re a A a 0 XL 7 7 o A A A O yeaa Raita te 36 914 A Side opposite ducts 0 0 0 36 914 2 1 16 Compressor access o ee ee ee ee 36 914 10 9 16 52 6 Except for NEC requirements SUPPLY 268 9
32. to propane different size orifices must be used See separate natural to propane conversion kit instructions Based on altitudes from sea level to 2000 ft above sea level For altitudes above 2000 ft reduce input rating 4 for each additional 1000 ft above sea level In Canada from 2000 ft above sea level to 4500 ft above sea level derate the unit 10 NOTE Unit size 018 is 48SS only Measure Gas Flow Natural Gas Units Minor adjust ment to the gas flow can be made by changing the man ifold pressure The manifold pressure must be maintained between 3 4 and 3 6 in wg If larger adjustments are re quired change main burner orifices following the recom mendations of national and local codes NOTE All other appliances that use the same meter must be turned off when gas flow is measured at the meter Proceed as follows 1 Turn off gas supply to unit 2 Remove pipe plug on manifold see Fig 24 then con nect manometer at this point Turn on gas to unit 3 Record number of seconds for gas meter test dial to make one revolution 4 Divide number of seconds in Step 3 into 3600 number of seconds in one hour 5 Multiply result of Step 4 by the number of cu ft shown for one revolution of test dial to obtain cu ft of gas flow per hour 6 Multiply result of Step 5 by Btu heating value of gas to obtain total measured input in Btuh Compare this value with heating input shown in Table 5 Consult the local gas supplie
33. unit 1 Turn off gas to unit 2 Remove pipe plug on manifold see Fig 24 then con nect manometer at this point 3 Turn on gas to unit 4 Remove cover screw over regulator adjustment screw on gas valve 5 Adjust regulator adjustment screw to the correct mani fold pressure as specified in Table 5 Turn adjusting screw clockwise to increase manifold pressure or turn adjusting screw counterclockwise to decrease manifold pressure 6 Replace cover screw 7 Turn off gas to unit Remove manometer from pressure tap Replace pipe plug on gas valve then turn on gas to unit Check for leaks CHECK BURNER FLAME With burner access panel re moved observe the unit heating operation Watch the burner flames to see if they are light blue and soft in appearance and that the flames are approximately the same for each burner Propane will have blue flame with yellow tips See Fig 25 Refer to Maintenance section for information on burner removal BURNER FLAME ay MANIFOLD Fig 25 Monoport Burners AIRFLOW AND TEMPERATURE RISE The heating sec tion for each size unit is designed and approved for heating operation within the temperature rise range stamped on the unit rating plate Table 6 shows the approved temperature rise range for each heating input and the air delivery cfm at various tempera ture rises The heating operation airflow must produce a tem perature rise that falls within the appro
34. 0 os 20 to8 15 14 too 208 280 1 60t 187 253 218 1240 21 5o 40 1 e 8 f 10 208 230 1 60 187 253 26 4 1290 21 50 41 eo 6 to 018 75 208 230 3 60 187 253 150 990 21 50 259 4o sto 100 100 a AECI AE oi oso 208 230360 167 258 193 1280 21 68 asof s 460 3 60 414 506 LEGEND AWG American Wire Gage FLA Full Load Amps U HACR Heating Air Conditioning and L Refrigeration 6 LRA Locked Rotor Amps MCA Minimum Circuit Amps MOCP Maximum Overcurrent Protection RLA Rated Load Amps U Fuse or HACR Breaker C L T Carrier Scroll Compressor e Copeland Scroll Compressor NOTES 1 In compliance with NEC National Electrical Code requirements for multimotor and combination load equipment refer to NEC Articles 430 and 440 the overcurrent protective device for the unit shall be fuse or HACR breaker The CGA Canadian Gas As sociation units may be fuse or circuit breaker 2 Minimum wire size is based on 60 C copper wire If other than 60 C wire is used or if length exceeds wire length in table de termine size from NEC 3 Unbalanced 3 Phase Supply Voltage Never operate a motor where a phase imbalance in supply volt age is greater than 2 Use the following formula to determine the percentage of voltage imbalance Noltage imbalance 100x Max voltage deviation from average voltage average voltage 19
35. 0 120 2411613 48SS042060 080 208 230 1 60 208 230 3 60 460 3 60 375 170 95 43 86 39 119 54 75 34 28 1 714 48SS042100 120 208 230 1 60 208 230 3 60 460 3 60 387 176 98 45 89 40 122 55 78 35 28 1 714 uun CENTER OF GRAVITY in mm oe 5 E LEGEND in mm in mm Center of Gravity MATL Material X Y Z COND Condenser NEC National Electrical Code 48SS018040 25 07 637 20 59 523 LV Low Voltage REQ D Required 48SS024040 27 07 688 23 35 593 NOTES 4855024060 26 98 685 23 27 591 1 Clearances must be maintained to prevent recirculation of air from outdoor 48SS030040 16 6 420 7 181 6 481 0 26 71 678 23 46 596 10 85 276 fan discharge 4855030060 080 27 15 689 22 36 568 2 Adequate clearance around air openings into combustion chamber must be provided 48SS036060 080 27 50 698 22 48 571 48SS036100 120 27 40 696 22 44 570 48SS042060 080 27 01 686 22 44 570 48SS042100 120 26 94 684 ERA Fig 2 48SS018 042 Without Base Rail Unit Dimensions 2 BLOWER ACCESS PANEL RIGHT SIDE VIEW ACCESS PANEL 45 1 2 COND COIL 1155 7 1 43 117 167 1108 8 BURNER AND CONTROL BOX 52 49 9 16 1320 8 1259 9 REQ D CLEARANCES FOR SERVICING in mm DUCE Bangl ie a Rete 7012 E AE EH a E e i a 0 UnitiOPi ciao Pgs ee ee Ud A as ran E 36 914 Side opposite ducts 0 o 02 0008 36914 es ASS SSA lt Compressor access 2
36. 08 230 3 60 465 211 120 55 96 44 167 76 LEGEND CG Center of Gravity MAT L Material COND Condenser NEC National Electrical Code LV Low Voltage REQ D Required NOTES 1 Clearances must be maintained to prevent recirculation of air from outdoor fan discharge 2 Adequate clearance around air openings into combustion chamber must be provided Fig 8 48SX042 060 Without Base Rail Unit Dimensions 2 1 16 52 3 7 8 22 2 DIA S 1 2 1 1 8 28 6 DIA 155 9 POWER ENTRY COND COIL CONTROL ENTRY 0 15 167 19 16 23 8 K DNS 39 7 Y 8 TA OPTIONAL RETURN Ue eh AIR OPENING EVAP COIL 52 49 9 16 RETURN 1320 8 1259 3 14 7 16 365 9 1 8 41 3 DIA x Meera NPT FLUE PANEL j c GAS CONNECTION 2 171 s 10 9 16 REAR VIEW APPLY 268 9 4 13 16 i Sn AA 0 L 13 16 122 2 KA aoe tiie 46 2 Gov ot T 11 1 15 ana Vass 281 4 OPTIONAL SUPPLY Y 17 1116 AIR OPENING 433 9 REQ D CLEARANCES FOR SERVICING in mm D t panali po anita Ss wee R eo T Pea RR Ee H Sie Be 0 he 578 NIETO ia aoe EE evra ghee Gia a ean TA 36 914 396 9 Side opposite ducts 0 36 914 Compressor access 2 eee ee ee 36 914 Except for NEC requirements REQ D CLEARANCES TO COMBUSTIBLE MATL in mm BLOWER ACCESS BURNER AND CONTROL BOX Maximum extension of overhangs a oa oo aa 48 1219 PANEL RIGHT
37. 080 48SS060100 120 140 17 66 448 6 17 66 448 6 17 66 448 6 17 66 448 6 28 18 715 6 20 19 512 8 27 79 705 9 20 23 513 8 UNIT WEIGHT Ce EP a E AA 21 16 52 3 1 148 28 6 DIA POWER ENTRY 7 8 22 2 DIA CONTROL ENTRY 1 13 16 45 3 29 7 8 758 8 818 1 2 14 NPT FLUE PANEL GAS CONNECTION REAR VIEW CORNER WEIGHT Ib kg LEGEND CG Center of Gravity MAT L Material COND Condenser NEC National Electrical Code LV Low Voltage REQ D Required NOTES 1 Clearances must be maintained to prevent recirculation of air from outdoor fan discharge 2 Adequate clearance around air openings into combustion chamber must be provided Fig 5 48SS048 060 With Optional Base Rail Unit Dimensions 5 1 4 31 9 DIA 7 8 22 2 DIA ALTERNATE POWER ENTRY ALTERNATE LV ENTRY EVAP COIL ACCESS COND COIL K 11 16 L gt EVAP COIL OPTIONAL RETURN 18 1 16 4 49 9 16 1259 3 lt 14 7 16 g 365 9 10 9 16 SUPPLY 268 9 LEFT SIDE VIEW A REQ D CLEARANCES FOR SERVICING in mm 81 47 209 6 DUctpanel e a a a o R daa AWE te o 0 N S A is R d ee ee RR OS 36 914 Y Be a Side opposite ducts o oo a a 36 914 Pa See Compressor access 2 22 ee ee ee eee 36 914 ATR OPENING Except for NEC requirements REQ D CLEARANCES TO COMBUSTIBLE MAT
38. 13 233 247 259 272 278 285 70 SPH 136 141 146 150 171 192 213 228 242 257 263 269 75 SPH 130 130 130 130 151 172 192 209 226 242 248 254 so SPH 109 mo no 109 136 161 187 201 214 227 236 244 85 SPH 89 89 89 89 120 151 182 192 202 212 224 235 so SPH 83 84 84 83 109 136 162 177 192 208 216 225 sPH 78 78 78 78 99 120 141 161 182 202 209 217 100 SPH 73 73 73 73 93 114 136 156 176 197 202 207 105 SPH 67 67 67 67 88 109 130 150 171 191 194 198 no sm gt 67 89 109 130 50 171 180 189 ms SPH 68 89 109 130 150 165 180 LEGEND Ewb Entering Wet Bulb SPH Superheat at Compressor F Do not attempt to charge system under these conditions refrig erant slugging may occur Table 8D Superheat Charging Table 48SS036 EVAP AIR CFM KH 1200 COND Evap Air Ewb F STS e2 H e 7m 2 a7 65 SPH 84 84 84 84 125 167 187 207 220 234 248 26 1 70 SPH 50 50 50 50 90 181 159 186 200 213 227 240 sa gt 84 96 131 166 179 193 206 220 80 SPH gt gt gt gt gt 0 103 145 159 173 18 6 20 0 easar VER VELO E GE a e e REO 0 sa AAA A 54 104 12
39. 2 Charge Ib REFRIGERANT METERING DEVICE Orifice ID in CONDENSER COIL Rows Fins in Face Area sq ft CONDENSER FAN Nominal Cfm Diameter in Motor Hp Rpm 1900 18 Ya 1050 1900 18 Ya 1050 Reciprocating 1 Acutrol Device S asosa o o o o o a o Car 3 a a 4 4 Hermetic Scroll 1 2400 20 Ya 1050 375 375 387 387 414 426 426 426 453 399 399 411 411 438 450 450 450 477 034 034 034 034 030 030 030 030 030 2 17 R E 2 17 2 17 2 17 2 17 2 17 2 17 2 17 7 04 7 04 7 04 7 04 8 67 8 67 8 67 8 67 8 67 2400 20 Ya 1050 Et 060120 465 465 489 489 7 00 030 2 17 8 67 2400 20 Ya 1050 2400 20 Ya 1050 20x20 20x20 20x20 20x24 20x24 20x 24 20 x 24 20x 24 20 x 24 20 x 24 060140 5 465 489 2400 20 Ya 1050 EVAPORATOR COIL Rows Fins in Face Area sq ft EVAPORATOR FAN Nominal Airflow Cfm Size in FURNACE SECTION Burner Orifice Qty drill size Natural Gas Burner Orifice Qty drill size Propane Gas RETURN AIR FILTERS in t Throwaway 1400 10 x 10 Based on altitude of 0 2000 feet 1400 10 x 10 1900 1900 2400 2400 2400 18 18 20 20 20 Ya 1050 Ya 1050 1050 1050 1050 3 15 3 15 4 44 4 44 Direct Drive 1400 1400 1600 1600 1600 10x10 10x10 10x10 10x10 10x10 1600 10x10 tRequired filter sizes shown are based on the larger of the ARI Air Conditioni
40. 48SS018 060 48SX024 060 Single Package Gas Heating Electric Cooling Units Installation Start Up and ee Service Instructions COMMERCIAL CONTENTS Page SAFETY CONSIDERATIONS 1 9 General 1 RECEIVING AND INSTALLATION 10 22 Step 1 Check Equipment 10 s IDENTIFY UNIT INSPECT SHIPMENT Step 2 Provide Unit Support 10 e ROOF CURB s SLAB MOUNT s FLUSH MOUNT Step 3 Field Fabricate Ductwork 10 Step 4 Provide Clearances 10 Step 5 Rig and Place Unit 10 e UNITS WITHOUT BASE RAIL s UNITS WITH OPTIONAL BASE RAIL Step 6 Connect Condensate Drain 13 Step 7 Install Flue Hood 13 Step 8 Install Gas Piping 13 Step 9 Install Duct Connections 16 e CONFIGURING UNITS FOR DOWNFLOW VERTICAL DISCHARGE Step 10 Install Electrical Connections 18 s HIGH VOLTAGE CONNECTIONS e SPECIAL PROCEDURES FOR 208 V OPERATION CONTROL VOLTAGE CONNECTIONS NON INTEGRATED CONTROL MOTOR NON ICM UNITS CONTROL VOLTAGE CONNECTIONS INTEGRATED CONTROL MOTOR ICM UNITS e HEAT ANTICIPATOR SETTING s TRANSFORMER PROTECTION PRE START UP occ 22 23 START UP a Ra R irrita 23 44 MAINTENANCE 44 47 TROUBLESHOOTING 48 50 START UP CHECKLIST CL 1 NOTE TO INSTALLER Before the installation READ
41. 5 146 168 188 95 seH gt 8 AR te BAT na 141 170 198 w j sem o ER E SE e O TS A E HERA MT ws sea o EA FE E OA A E A A E EE 110 seH J gt f gt of gt T gt ERA gt T 93 124 156 187 KR cE BA E A A EA AA E LEGEND Do not attempt to charge system under these conditions refrig Ewb Entering Wet Bulb SPH Superheat at Compressor F erant slugging may occur Table 8E Superheat Charging Table 4855042 EVAP AIR CFM AIR ENT 1400 COND Evap Air Ewb F 54 56 58 60 62 6 66 6 70 72 74 76 65 SPH 11 0 110 11 0 140 170 200 220 240 260 260 277 286 70 SPH 75 75 75 104 134 164 189 214 240 250 261 27 1 75 seH 69 99 129 159 189 219 232 244 257 so sPH gt 59 84 108 138 168 198 213 228 249 es sPH gt 50 69 88 18 148 178 195 211 228 80 seH o gt gt gt 68 10 2 137 173 186 20 0 21 4 95 seH gt 50 87 127 167 178 189 200 100 seH gt gt gt gt E f es 105 146 16 4 18 2 20 0 105 seH gt J gt pt T gt gt T gt f 8a 126 151 176 200 mo SPH 80 120 142 164 186 ns sH gt gt 5 pe 71H a 183 172 LEGEND Do not attempt to charge system under these conditions refrig Ewb
42. 5 v HACR Heating Air Conditioning and G des Refrigeration _ 452 464 LRA Locked Rotor Amps Average Voltage 3 MCA Minimum Circuit Amps MOCP Maximum Overcurrent Protection 1371 RLA Rated Load Amps U SR Fuse or HACR Breaker C L 3 t Carrier Scroll Compressor 457 Copeland Scroll Compressor NOTES 1 In compliance with NEC National Electrical Code requirements for multimotor and combination load equipment refer to NEC Articles 430 and 440 the overcurrent protective device for the unit shall be fuse or HACR breaker The CGA Canadian Gas As sociation units may be fuse or circuit breaker Minimum wire size is based on 60 C copper wire If other than 60 C wire is used or if length exceeds wire length in table de termine size from NEC Unbalanced 3 Phase Supply Voltage Never operate a motor where a phase imbalance in supply volt age is greater than 2 Use the following formula to determine the percentage of voltage imbalance Voltage imbalance max voltage deviation from average voltage average voltage 100 x 20 Determine maximum deviation from average voltage AB 457 452 5 v BC 464 457 7 v AC 457 455 2 V Maximum deviation is 7 v Determine percent of voltage imbalance 7 457 1 53 This amount of phase imbalance is satisfactory as it is below the maximum allowable 2 Voltage Imbalance 100 x IMPORTANT If the supply voltage phase
43. 68 1882 1796 1676 1555 1437 1318 Air delivery values are without air filter and are for dry coil See NOTE Do not operate the unit at a cooling airflow that is less than Table 17 for wet coil pressure drop Deduct field supplied air filter 350 cfm for each 12 000 Btuh of rated cooling capacity Evaporator pressure drop and wet coil pressure drop to obtain external static coil icing may occur at airflows below this point Water blow off may pressure available for ducting occur at airflows above 450 cfm per 12 000 Btuh of rated cooling Unit air delivery is outside of operating range capacity Table 13 Dry Coil Air Delivery Horizontal Discharge at 230 and 460 V Unit 48SX Deduct 10 from Cfm and Watts for 208 V Operation UNIT MOTOR AIR EXTERNAL STATIC PRESSURE in wg 48Sx_ SPEED DELIVERY 00 01 02 03 04 05 06 07 08 09 10 820 810 755 700 660 600 560 T T T 1025 1010 975 eso 90 8so 800 720 630 con Watts Sn Waits Sn O al Sass Waits Cim Wats t 650 64 575 540 510 480_ Sn 380 n 360 1300 024 030 ojo High Loy Was 490 480 460 Sn 1300 042 Med Watts 590 580 560 545 525 505 480 450 420 t Cfm 1600 1560 1540 1470 1430 1360 1300 1220 1120 t mign __Watts t t 700 670 60 600 50 i 1 ojo 1 70 EN Sn S a ae 7 on C wms 1050 1000 o0 eso 87 sto 750 es0 eo Cim a aa ol e aa aaa
44. 97 4855030040 208 230 1 60 208 230 3 60 106 48 53 24 132 60 53 24 27 4 697 48SS030060 080 208 230 1 60 208 230 3 60 102 46 71 32 123 56 60 27 27 4 697 48SS036060 080 208 230 1 60 208 230 3 60 460 3 60 92 42 82 37 117 53 69 31 27 4 697 48SS036100 120 208 230 1 60 208 230 3 60 460 3 60 95 43 85 39 120 55 72 33 27 4 697 48SS042060 080 208 230 1 60 208 230 3 60 460 3 60 399 181 101 46 92 42 125 57 81 37 31 4 798 4855042100 120 208 230 1 60 208 230 3 60 460 3 60 411 187 104 47 95 43 128 58 84 38 31 4 798 UNIT MER CENTER OF GRAVITY in mm ap gt a a oe A Gand Center of Gravity L Material mn D imm O O x Y Z COND Condenser NEC National Electrical Code 4855018040 25 04 636 22 72 577 LV Low Voltage REQ D Required 4855024040 26 90 683 3 Ea 17 512 3 4855024060 26 82 681 2 20 22 513 6 NOTES ee e 1 Clearances must be maintained to prevent recirculation of air from outdoor 4855030040 1974 504 8 2214 565 4 26 57 674 9 20 1 509 3 13 16 334 3 fan discharge 2 Adequate clearance around air openings into combustion chamber must 48SS030060 080 26 93 684 21 1 535 4 be ploviied 48SS036060 080 27 31 693 7 21 0 532 6 48SS036100 120 27 23 691 6 21 0 533 1 4855042060 080 26 87 682 5 21 0 533 1 7 1 4855042700730 23 606 4 2616668 e Too a337 1490 380 Fig 3 48SS018 042 With Optional Base Rail Unit Dimensions 3 COND COIL 43 11 16 1108 8 EVAP COIL AIR OPE
45. B Superheat Charging Table 48SX030 EVAP AIR CFM reo T COND Evap Air Ewb F ASAS AA AAA 76 65 SPH t12 t12 112 112 149 186 223 224 225 227 229 23 1 70 SPH 75 77 77 77 121 166 211 216 220 224 225 225 T S of ey ear dar aaa eaten seed 221 220 so seH gt gt gt gt J 8s 135 185 193 202 21 0 21 6 22 1 85 SPH gt gt 76 123 170 180 189 199 211 223 o sa OA 100 142 160 178 196 27 218 95 SPH gt 77 ns 141 167 192 202 21 2 100 SPH 57 99 140 182 194 206 105 SPH 57 14 171 186 201 110 SPH 89 135 158 180 ns sH gt gt gt CE O T gt A O A too 130 160 LEGEND Do not attempt to charge system under these conditions refrig Ewb Entering Wet Bulb erant slugging may occur SPH Superheat at Compressor F Table 9C Superheat Charging Table 485X036 EVAP AIR CFM E 1200 COND Evap Air Ewb F ss ss 8 0 62 6 6 68 70 2 73 7 6 s 213 215 213 213 220 226 283 285 287 288 233 228 70 SPH 193 193 193 193 202 212 222 23 225 226 220 215 75 SPH 172 172 172 172 185 197 210 214 213 214 207 20 so SPH 136 136
46. Book 1 4 PC 111 Catalog No 564 955 Printed in U S A Form 48SS SX 10SI Pg 50 1 97 Replaces 48SS SX 8SI Tab taj6a START UP CHECKLIST Remove and Store in Job File lI PRELIMINARY INFORMATION MODEL NO DATE SERIAL NO TECHNICIAN ll PRE START UP insert checkmark in box as each item is completed CHECK GAS PIPING FOR LEAKS VERIFY THAT UNIT INSTALLATION IS LEVEL TIGHTNESS lll START UP ELECTRICAL SUPPLY VOLTAGE L1 L2 L2 L3 COMPRESSOR AMPS L1 L2 COMPRESSOR AMPS LI L2 INDOOR EVAPORATOR FAN AMPS TEMPERATURES OUTDOOR CONDENSER AIR TEMPERATURE RETURN AIR TEMPERATURE DB COOLING SUPPLY AIR GAS HEAT SUPPLY AIR PRESSURES GAS INLET PRESSURE IN WG GAS MANIFOLD PRESSURE IN WG REFRIGERANT SUCTION PSIG REFRIGERANT DISCHARGE PSIG CORRECT DIRECTION Copyright 1997 Carrier Corporation VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS CHECK THAT INDOOR EVAPORATOR AIR FILTER IS CLEAN AND IN PLACE CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING ORIFICE AND SETSCREW L3 L1 L3 L3 DB WB VERIFY REFRIGERANT CHARGE USING CHARGING TABLES VERIFY THAT 3 PHASE SCROLL COMPRESSOR 4855048 060 AND 48S X036 060 UNITS ROTATING IN Manufacturer reserves the right to discontinue or change at any time s
47. E RED AND ORN RED a LEADS ON TRANSFORMER YEL 030 shied YEL TTK RAN YEL 1 COOLING FAN LOGIC 1 aR ORN RED FL BLK 230 200 0 T 71 30 6 6 seer RANI YEL VIO BLURED ENERGIZED DE ENERGIZED eh arn IP T HEATING FAN LOGIC YEL BR N 0 45 T T 30 N BR N BR RED ENERGIZED ENERGIZED DE ENERGIZED DE ENERGIZED WHT GRN RED BLU persa Ls YEL gd GRA BRN SINGLE STAGE HEAT amp SINGLE STAGE ve o op COOL THERMOSTAT TYP 24V SPLICE I COMMON BOX oRN 0 O fhp GRN YE L f BRN c t GROUNDED THRU STANDOFF BRN 24V COMP AREA COMP AREA DISCONNEC COMPONENT YEL BRN TRAN MESS T ony CONN ARRANGEMENT LEGEND AWG American Wire Gage PWR Power BR Blower Relay QT Quadruple Terminal C Contactor RS Rollout Switch CAP Capacitor TRAN Transformer CH Crankcase Heater E COMP Compressor Motor LEN Field Splice TENANTE en i E com ustion Relay DISCONNECT ea E pau pmen lt gt Terminal Marked FS Flame Sensor l FU Fuse O Terminal Unmarked GND Ground l GVH Gas Valve Relay 0 Splice Hall Effect Sensor HV TRAN High Voltage Transformer Splice Marked l Ignitor A pes IEM een Motor Factory Wiring Indoor Fan Motor A iri IGC Integrated Gas Control TAT Fielg Control wiring IP Internal Protector w m mm Field Power Wiring Gi YI a Accessory or Optional Wiring Main Gas Valve i NEC National Electrica
48. ERS in Disposable 2 15 2 15 3 15 3 15 3 15 4 15 4 15 4 15 3 6 3 6 2 7 2 7 2 7 3 6 3 6 3 6 Direct Drive 800 800 1000 1000 1000 1200 1200 1200 10x 10 10x 10 10x 10 10x 10 10 x 10 10x 10 10x 10 10x 10 24 x 24 24 x 24 24 x 24 24 x 24 24 x 24 24 x 24 24 x 24 24 x 24 4 15 3 6 1200 10 x 10 3 32 3 42 24 x 24 UNIT SIZE 48SX TETI 042080 042100 042120 048080 a 00 HET Era UT 20 S NOMINAL CAPACITY ton 3 3 3 3 4 4 OPERATING WEIGHT Ib Without Base Rail 391 391 403 403 422 434 434 434 453 465 465 465 with Optional Base Rail 415 415 427 427 446 458 458 458 477 489 489 489 COMPRESSORS Scroll Quantity 1 REFRIGERANT R 22 Charge Ib 5 7 5 7 5 7 5 7 5 8 5 8 5 8 5 8 7 00 7 00 7 00 REFRIGERANT METERING Acutrol Device DEVICE Orifice ID in 034 034 034 034 034 034 034 034 030 030 030 CONDENSER COIL Rows Fins in 2 47 2 17 2 417 2 47 2 17 2 47 2 17 2 17 2 17 2 17 2 47 Face Area sq ft 8 7 8 7 8 7 8 7 8 7 8 7 8 7 8 7 8 67 8 67 8 67 CONDENSER FAN Nominal Cfm 2400 2400 2400 2400 2400 2400 2400 2400 2400 2400 2400 Diameter in 20 20 20 20 20 20 20 20 20 20 20 Motor Hp Rpm Ya 1100 1100 va 1100 va 1100 1100 va 1100 va 1100 Ya 1050 18 1050 vs 1050 vs 1050 EVAPORATOR COIL Rows Fins in 3 15 3 15 3 15 4 15 4 15 4 15 4 15 Face Area sq ft 4 4 4 4 4 4 4 4 4 4 4 4 4 44 EVAPORATOR FAN
49. Entering Wet Bulb erant slugging may occur SPH Superheat at Compressor F Table 8F Superheat Charging Table 4855048 Carrier Scroll Compressor EVAP AIR CFM TEMP F 1600 AIR ENT S COND Evap Air Ewb F 54 56 58 60 62 6 6 68 70 72 74 76 65 SPH 155 155 156 156 176 196 216 228 240 25 2 252 253 70 SPH 1417 18 18 11 8 139 160 180 201 222 243 243 243 75 SPH s0 80 80 80 102 123 145 174 204 233 283 233 80 SPH 60 60 60 60 87 113 139 163 186 209 215 220 85 SPH gt gt gt gt J 72 103 134 151 16 8 185 197 208 90 SPH gt 56 77 99 124 150 176 187 198 9 SPH 52 63 98 132 167 177 188 100 sPH 1 Eo f gt f gt gt 58a 91 125 158 171 18 4 105 ESPA gt SS J gt f gt f gt f 52 84 n7 149 165 181 no SPH gt 62 88 n4 140 159 178 115 SPH gt gt 71 91 11 131 153 175 LEGEND Do not attempt to charge system under these conditions refrig Ewb Entering Wet Bulb erant slugging may occur SPH Superheat at Compressor F Table 8G Superheat Charging Table 485S048 Copeland Scroll Compressor EVAP AIR CFM TEMP AIR ENT 1900 COND Evap Air Ewb F ss o e se oe 65 SPH
50. Factory Wiring Indoor Fan Motor iri IGC Integrated Gas Control E Field Gontro Wiring LS Limit Switch eee Field Power Wiring Main Gas Valve Accessory or Optional Wiring ar DOD ce sed dd NOTES 1 If any of the original wire furnished must be replaced it must be replaced with type 90 C wire or its equivalent 2 Use copper conductors only Fig 28 460 3 60 Wiring Diagram Units 48SS036 060 29 FIELO K OFM MAXIMUM WIRE J SUPPLY SR ye SIZE 2 AWG ne 6 LR lh EQUIP GNO E 036 ONLY YEL 230 VOLT OPERATION AS SHOWN FOR 208 024 036 048 060 BLK ane VOLT OPERATION REVERSE RED AND ORN En BLUE LEADS ON TRANSFORMER RED ten TLS BRN W MOTORS 030 042 A B as e HY KO HD AN YEL hh gt COOLING FAN LOGIC gy to aE VIO 230 200 CC BLU BRN 10M T T 30 TRANI sl vla T du zeu ENERGIZED DE ENERGIZED Ro EN Bad C HEATING FAN LOGIC E p p BLK o 45 T 1430 N BR N BR RED ENERGIZED ENERGIZED DE ENERGIZEO DE ENERGIZED e WHT ers GRN l RED YEL ee BRN FS SINGLE STAGE HEAT amp SINGLE STAGE ai MAIN oe YEL Oije COOL THERMOSTAT TYP COMMON ki Ze in GRANEL BRN c gt GROUNDED THRU STANDOFF BLK WHT BRN 24V P AREA COMP Al pT 1 G AIN PWR COMPONENT YEL v10 T vio BRN TRAN ARRANGEMENT E 036 042 ONLY BRN ter 024 030 ONLY YEL YEL BRN C LEGEND AWG American Wire Gage PWR Power BR
51. IELD SUPPLIED A OPENING ROOFING MATERIAL lt FIELD SUPPLIED SEs Gy SNS SS RIGID INSULATION FIELD SUPPLIED DETAIL A Fig 10 Roof Curb Dimensions 11 FLUSH WITH SLAB Fig 11 Slab Mounting Details SEAL STRIP MUST BE IN PLACE BEFORE PLACING UNIT ON ROOF CURB 914 1371 54m DUCT END e SECURE SCREW AGAINST BASEPAN TO HOLD LIFTING 3 BRACKET IN PLACE DETAILA NOTICE TO RIGGERS Hook rigging shackles through holes in lifting brackets as shown in Detail A Lifting brackets to be centered around the unit center of gravity Use wooden top skid when rigging to prevent rigging straps from damaging unit A CAUTION All panels must be in place when rigging UNIT MAX 48SS WEIGHT Size lb kg in mm in mm in 018 024 030 036 49 4 1255 042 048 060 UNIT 48SX 024 030 036 042 048 060 49 4 1255 Fig 12 Suggested Rigging for Units Without Base Rail 12 SCREWS SEAL_STRIP MUST BE IN PLACE BEFORE PLACING 914 1371 UNIT ON ROOF CURE 36 S4 OUCT END DETAIL A SCREWS cesta cme NOTICE TO RIGGERS Hook rigging shackles through holes in lifting brackets as shown in Detail A Lifting brackets to be centered around the unit center of gravity Use wood top skid when rigging to prevent rigging straps from damaging unit Remove 4 screws to slide wood support through rectangular hole in rail
52. L in mm Maximum extension of overhangs 48 1219 4 13 16 UnA 2 and Sort ri a o a Ae eS 144306 122 2 DIE ESE OE unit a e a a ee lar te A 2 51 Side opposite ducts 0 2 0008 14 356 Bottom Of ORE 4 R E Ra E ge O54 Na edi dE a eee Pe as 0 FUE Panel pe hte A oe eae Eig Teds E Seedy By ahs 36 914 d NEC REQ D CLEARANCES in mm ha gne Between units control box side a n u u oa a a 42 1067 G12 7 Unit and ungrounded surfaces control box side 36 914 Unit and block or concrete walls and other grounded surfaces control box side 028 42 1067 Irons BLOWER ACCESS BURNER AND CONTROL BOX PANEL RIGHT SIDE VIEW ACCESS PANEL COMPRESSOR ACCESS PANEL 7 8 22 2 DIA 1 1 8 28 6 DIA CONTROL ENTRY ROWER ENTRY ES 9 16 90 5 1 5 8 41 3 DIA GAS ENTRY 3 4 NPT 19 0 DRAIN outer 1 2 14 NPT GAS CONNECTION FLUE PANEL FRONT VIEW REAR VIEW ELECTRICAL UNIT WEIGHT Ba n T oe scene EIA A EL CI 485X024040 208 230 1 60 333 104 47 50 23 130 59 48SX024060 208 230 1 60 345 107 49 53 24 133 60 48SX030040 208 230 1 60 336 97 44 66 30 118 54 48SX030060 080 208 230 1 60 348 100 45 69 31 121 55 48SX036060 080 208 230 1 60 208 230 3 60 460 3 60 366 94 43 84 38 117 53 48SX036100 120 208 230 1 60 208 230 3 60 460 3 60 378 97 44 87 40 120 55 74 34 CENTER OF GRAVITY in mm
53. LEGEND UNIT X Z CG Center of Gravity MAT L Material COND Condenser NEC National Electrical Code 48SX024040 26 71 678 20 06 510 12 65 321 Low Voltage REQ D Required 48SX024060 26 64 677 20 12 511 12 65 321 285X030010 IAS S 12 65321 T ENEN st be maintained to prevent recirculation of air from outdoor 485X030060 080 26 98 685 21 07 535 12 65 321 fan discharge E R g 48SX036060 080 27 14 689 21 10 536 12 65 321 2 Adequate clearance around air openings into combustion chamber must 485X036100 120 27 06 687 21 12 536 12 65 321 be provided Fig 6 48SX024 036 Without Base Rail Unit Dimensions 6 4 13 16 122 2 BLOWER ACCESS PANEL BURNER AND CONTROL BOX RIGHT SIDE VIEW ACCESS PANEL REQ D CLEARANCES FOR SERVICING in mm DECI panel 2 6 le ee wel Re he EO ee 4 0 Unit eos 7 6 ToS een e he eee a TR sed 36 914 Side opposite ducts 36 914 Compressor access 2 2 ee 36 914 Except for NEC requirements REQ D CLEARANCES TO COMBUSTIBLE MAT L in mm Maximum extension of overhangs 48 1219 UNI HOP lt Gite ie o ra e ate tee haan ae dora a 14 ee DECESO a sR Le po d cask crane Here ane Seed 8 2 51 Side opposite ducts 2 u 2 ee 14 356 Bottomsor unit Cua tae Sale ie Re te ae ee A En et oe tk 0 Flue panels a aie RR TEE E 9 36 914 NEC REQ D CLEARANCES in mm Between units control box side 0 2 1067
54. NING RETURN 49 9 16 1259 3 14 7 16 365 9 SUPPLY 4 3 4 120 6 BLOWER ACCESS BURNER AND CONTROL BOX PANEL RIGHT SIDE VIEW ACCESS PANEL 57 fea E COMPRESSOR ACCESS PANEL 22 3 16 3 4 NPT 19 0 55 6 DRAIN OUTLET FRONT_VIEN ELECTRICAL UNIT CHARACTERISTICS 4855048080 48SS048100 120 140 48SS060080 48SS060100 120 140 CENTER OF GRAVITY in mm UNIT 48SS048080 28 76 731 23 46 598 15 35 890 48SS048100 120 140 28 42 722 23 42 595 15 35 390 4855060080 28 36 720 23 27 591 15 35 390 48SS060100 120 140 27 95 710 23 23 590 15 35 390 OPTIONAL RETURN 10 9 16 268 9 D Lane 1 uag 46 2 S r OPTIONAL SUPPLY 17 1 16 o AIR OPENING UNIT WEIGHT a G a a O 7 8 22 23 1 1 4 31 75 ALTERNATE LV ENTRY ALTERNATE POWER ENTRY FLUE HOOD EVAP COIL ACCESS 2 5 16 0 1 3 16 29 6 10 o 325 4 253 8 LEFT SIDE VIEW REQ D CLEARANCES FOR SERVICING in mm Duct panels uds ro a de das e Bagh aed ph bee be bdo NOD a S S cr S a eee te eee a ar es a eg 36 914 Side opposite ducts 2 2004 36 914 Compressor access 2 2 ee eee ee 36 914 Except for NEC requirements REQ D CLEARANCES TO COMBUSTIBLE MAT in mm Maximum extension Of overhangs 48 1219 MA O E ee 14 356 Duct sito ORURO 2 51 Side opposite ducts 2 bd ede ie AA 14 356 Bott
55. ON With the room thermostat SYSTEM switch in the COOL position and the FAN switch in the AUTO position the cooling sequence of operation is as follows When the room temperature rises to a point that is slightly above the cooling control setting of the thermostat the ther mostat completes the circuit between thermostat terminal R to terminals Y and G These completed circuits through the thermostat connect contactor coil C through unit wire Y and blower relay coil BR through unit wire G across the 24 v secondary of transformer TRAN NOTE The blower relay coil BR is used on standard non ICM units ICM units use evaporator indoor fan on IFO connection The normally open contacts of energized contactor C close and complete the circuit through compressor motor COMP to condenser outdoor fan motor OFM Both motors start instantly On standard non ICM units the set of normally open con tacts of energized relay BR close and complete the circuit through evaporator blower indoor fan motor IFM On ICM units the IFO completes the circuit through evaporator blower IFM The blower motor starts instantly NOTE Once the compressor has started and then has stopped it should not be started again until 5 minutes have elapsed The cooling cycle remains on until the room tempera ture drops to point that is slightly below the cooling control setting of the room thermostat At this point the thermostat
56. SIDE VIEW ACCESS PANEL Unit TOD So ieee eae VR E RT a ee one AE le ale ie vee Gite 14 356 ed Duct side of Unit lt a Aer maren o a a A 2 51 Side opposite ducts 2 2008 14 356 nares Bottom of unit esc T Re A ee a ex ae a a Ae ha 0 ALTERNATE POWER ENTRY Elle panel x ae feo es seo Se e eps he Cas Pew Moko e 36 914 FLUE HOOD EVAP COIL access 0 7 8 a CG Center of Gravity COND Condenser LV Low Voltage MAT L Material NEC National Electrical Code REQ D Required 18 1 16 458 8 E aop lo H 1 2 i 292 1 325 4 4 968 a 4 NPT 19 0 1 3 16 l la 10 atra 29 6 253 8 DRAIN OUTLET 34 9 LEFT SIDE VIEW FRONT VIEW nun ELECTRICAL UNIT WEIGHT kar Oar a o a AO 48SX042060 080 208 230 1 60 208 230 3 60 460 3 60 415 189 106 48 97 44 126 57 86 39 48SX042100 120 208 230 1 60 208 230 3 60 460 3 60 194 109 50 100 45 129 59 89 40 48SX060080 208 230 1 60 208 230 3 60 123 56 99 45 173 79 82 37 48SX060100 120 140 208 230 1 60 208 230 3 60 222 126 57 102 46 173 79 88 40 427 485X048080 208 230 1 60 208 230 3 60 460 3 60 446 293 115 52 91 41 164 75 76 35 485X048100 120 140 208 230 1 60 208 230 3 60 460 3 60 79 36 S NOTES UNIT CENTER OF GRAVITY in mm 1 Clearances must be maintained to prevent recirculation of air from outdoor x Y Z fan discharge 48SX042060 080 26 55 674 4 21 22 539 0 17 66 448 6 2 Adequate clea
57. THESE INSTRUCTIONS CAREFULLY AND COM PLETELY Also make sure the User s Manual and Replace ment Guide are left with the unit after installation The fur nace is NOT to be used for temporary heating of buildings or structures under construction SAFETY CONSIDERATIONS Installation and servicing of air conditioning equipment can be hazardous due to system pressure and electrical com ponents Only trained and qualified personnel should install repair or service air conditioning equipment E 0 Fig 1 Unit 48SX Shown With Optional Base Rail Untrained personnel can perform basic maintenance func tions of cleaning coils and filters All other operations should be performed by trained service personnel When working on air conditioning equipment observe precautions in the literature tags and labels attached to the unit and other safety precautions that may apply Follow all safety codes Wear safety glasses and work gloves Use quenching cloth for unbrazing operations Have fire ex tinguisher available for all brazing operations A WARNING Improper installation adjustment alteration service main tenance or use can cause carbon monoxide poisoning fire or an explosion which can result in personal injury or unit damage Consult a qualified installer service agency or gas supplier for information or assistance The quali fied installer or agency must use only factory authorized kits or accessories when modifying
58. Terminal Marked GND Ground F a GVR Gas Valve Relay O Terminal Unmarked 2 Q di Hall Effect Sensor Soli HV TRAN High Voltage Transformer p ice l Ignitor ICM Integrated Control Motor lt gt Splice Marked IDM Induced Draft Motor Factory Wirin IFM Indoor Fan Motor y 9 IGC Integrated Gas Control Field Control Wiring LS Limit Switch eee Field Power Wiring NOTES es t l f MGV Main Gas Valve Accessory or Optional Wiring 1 If any of the original wire furnished must be replaced it must be NEC National Electrical Code To Indicate Common Potential replaced with type 90 C wire or its equivalent OFM Outdoor Fan Motor e Only Not to Represent Wiring 2 Use copper conductors only PWR Power Fig 32 208 230 3 60 Wiring Diagram Units 48SX048 060 33 C BLK EI mm Tra ger ae YEL OFM MAXIMUM WIRE SIRET am Teri Kae YEL CAP2 SIZE 2 AWG YEL O BRN L h POWER m Tt aT GRN YEL fl i BLK 0 BLU BLU COMP BLK YEL ve G E ONLY 036 048 060 y YEL IEN COOLING FAN LOGIC p BR n n j aa E 0 T T30 ENERGIZED DE ENERGIZED ape Wat TRANI HEATING FAN LOGIC RED c BR aaa 0 645 T T 30 Y BR W BR ENERGIZED ENERGIZED DE ENERGIZED DE ENERGIZED BLK RED u DAG WHT nE GRN RED YEL BRN MAIN SINGLE STAGE HEAT amp SINGLE STAGE 24V SPLICE COOL THERMOSTAT TYP COMMON X c 24v TRAN c To Indic
59. Unit and ungrounded surfaces control box side 36 914 Unit and block or concrete walls and other grounded surfaces control box side 2 1067 7 8 22 2 DIA pl 1 1 8 28 6 DIA FLUE HOOD POWER ENTRY 1 5 8 41 3 DIA GAS ENTRY 1 3 16 1 2 14 NPT FLUE PANEL 23 5 GAS CONNECTION REAR VIEW ELECTRICAL UNIT CHARACTERISTICS 48SX024040 48SX024060 48SX030040 48SX030060 080 48SX036060 080 48SX036100 120 208 230 1 60 a 10 o 253 8 UNIT WEIGHT Pa ee E a aa 163 m060 5025 19062 oro o H 168 w851 5927 199168 45 1 2 COND COIL i 43 11 167 on 1108 8 0 15 164 23 8 1 9 16 39 79 OPTIONAL RETURN AIR OPENING 9 16 52 49 1320 8 1259 3 365 9 21716 52 6 10 9 16 268 9 SUPPLY 12 1 16 L 433 9 OPTIONAL SUPPLY AIR OPENING 3 5 18 84 1 11 4 ALTERNATE ER ENTRY COMPRESSOR ACCESS PANEL o 778 EVAP COIL ACCESS 23 ALTERNATE LV ENTR 12 13 16 1 1 2 292 1 325 4 3 4 NPT 19 0 DRAIN OUTLET a2 3 16 LEFT SIDE VIEW 55 6 FRONT VIEW CORNER WEIGHT Ib kg 80 36 CENTER OF GRAVITY in mm LEGEND UNIT T E A Z CG Center of Gravity MAT L Material COND Condenser NEC National Electrical Code 48SX024040 26 57 674 9 20 17 512 3 14 96
60. aaa aaa aaa aaa aaa aaa aaa 8 Es eaa na aa a ES 1850 bis S Was t f 1050 1000 9 Cfm 2000 1940 1850 1750 1635 1500 1300 Air delivery values are without air filter and are for dry coil See NOTE Do not operate the unit at a cooling airflow that is less than Table 17 for wet coil pressure drop Deduct field supplied air filter 350 cfm for each 12 000 Btuh of rated cooling capacity Evaporator pressure drop and wet coil pressure drop to obtain external static coil icing may occur at airflows below this point Water blow off may pressure available for ducting occur at airflows above 450 cfm per 12 000 Btuh of rated cooling Unit air delivery is outside of operating range capacity For 460 v units only 42 Table 14 Dry Coil Air Delivery Downflow Discharge at 230 and 460 V Unit 48SX Deduct 10 from Cfm and Watts for 208 V Operation EXTERNAL STATIC PRESSURE in wg AIR DELIVERY o0 077 UNIT 48SX MOTOR SPEED 024 030 High a a ee ee 036 oz os ws H a 265 25 250 25 20 7 71 cm s eto 7s 700 s 600 560 t aa Was 3s 30 o 845 oso 30 30 s0 300 cm 0 00 95s 940 o0 eso 800 72 630 t wars 0 480 aro 460 4 480 no 30 waits 50 395 ara se 445 425 ieee es er ee a e a a k o 04 0s 06 07 08 09 ojo 1080 l t High em IE IS S SE eee ee cm 1600 1560
61. allation Codes or applicable provisions of local building code 4 CAUTION Do not restrict condenser airflow An air restriction at either the outdoor air inlet or the fan discharge can be detrimental to compressor life The condenser fan pushes air through the condenser coil and discharges it through the bank of louvers in the top cover the decorative grille on the right side of the unit and the compressor access panel Be sure that the fan discharge does not recirculate to the condenser coil Do not locate the unit in either a corner or under an overhead obstruction The mini mum clearance under a partial overhang such as a normal house overhang is 48 in above the unit top The maximum horizontal extension of a partial overhang must not exceed 48 inches Do not place the unit where water ice or snow from an overhang or roof will damage or flood the unit Do not in stall the unit on carpeting tile or other combustible mate rials The unit may be installed on wood flooring or on Class A B or C roof covering materials Step 5 Rig and Place Unit 4 CAUTION When installing the unit on a rooftop be sure the roof will support the additional weight Refer to Fig 2 9 for corner weight information Use spreader bars or crate top when rigging the unit The units must be rigged for lifting as shown in Fig 12 and 13 Refer to Tables 1 and 2 for operating weight and to Fig 2 9 for corner weights Use extreme ca
62. ate Common Potential Only Not to Represent Wiring Outdoor Fan Motor el Power LEGEND American Wire Gage QT Quadruple Terminal Blower Relay RS Rollout Switch Contactor RT Red Terminal capacitor p TRAN Transformer Compressor Motor l Combustion Relay ZA Field Splice Equipment Flame Sensor lt gt Terminal Marked Fuse 2 Ground O Terminal Unmarked Gas Valve Relay A Hall Effect Sensor O Splice High Voltage Transformer Z tor S De Splice Marked Induced Draft Motor F Wiri Indoor Fan Motor Factory Wiring Integrated Gas Control Field Control Wiring Limit Switch m gt Field Power Wiring Main Gas Valve c ee National Electrical Code Accessory or Optional Wiring cap 1 CAP zard PWR NOTES 1 If any of the original wire furnished must be replaced it must be re placed with type 90 C wire or its equivalent 2 Use copper conductors only Fig 33 460 3 60 Wiring Diagram Units 48SX036 048 34 CHECKING AND ADJUSTING REFRIGERANT CHARGE The refrigerant system is fully charged with R 22 refrig erant tested and factory sealed NOTE Adjustment of the refrigerant charge is not required unless the unit is suspected of not having the proper R 22 charge A superheat charging label is attached to the inside of the compressor access door The label includes a Superheat Charg ing Table and a R
63. breaks the circuit between thermostat terminal R to ter minals Y and G These open circuits deenergize contactor coil C and relay coil BR The condenser and compressor mo tors stop After a 30 second delay the blower motor stops The unit is in a standby condition waiting for the next call for cooling from the room thermostat 44 MAINTENANCE To ensure continuing high performance and to minimize the possibility of premature equipment failure periodic main tenance must be performed on this equipment This combi nation heating cooling unit should be inspected at least once each year by a qualified service person To troubleshoot heat ing or cooling of units refer to tables at the back of the book NOTE TO EQUIPMENT OWNER Consult your local dealer about the availability of a maintenance contract A WARNING The ability to properly perform maintenance on this equip ment requires certain expertise mechanical skills tools and equipment If you do not possess these do not at tempt to perform any maintenance on this equipment other than those procedures recommended in the User s Manual FAILURE TO HEED THIS WARNING COULD RESULT IN SERIOUS PERSONAL INJURY AND POSSIBLE DAMAGE TO THIS EQUIPMENT A WARNING Failure to follow these warnings could result in serious personal injury 1 Turn off gas supply then turn off electrical power to the unit before performing any maintenance or serv ice on the unit
64. ction operation label located inside the burner or blower access door to start the heating section NOTE Make sure that gas supply has been purged and that all gas piping has been checked for leaks CHECK HEATING CONTROL Start and check the unit for proper heating control operation as follows See furnace lighting instructions located inside burner or blower access panel 1 Place the room thermostat SYSTEM switch in the HEAT position and the fan switch in the AUTO position 2 Set the heating temperature control of the thermostat above room temperature 3 The induced draft motor will start 4 After a call for heating the main burner should light with in 5 seconds If the burners do not light there is a 22 second delay before another 5 second try If the burn ers still do not light this sequence is repeated If the burn ers do not light within 15 minutes from the initial call for heat there is a lockout To reset the control break the 24 v power to W 5 The evaporator fan will turn on 45 seconds after the flame has been established The evaporator fan will turn off 45 seconds after the thermostat has been satisfied CHECK GAS INPUT Check gas input and manifold pres sure after unit start up See Table 5 If adjustment is required proceed as follows The rated gas inputs shown in Table 5 are for al titudes from sea level to 2000 ft above sea level These in puts are based on natural gas with a heati
65. d Make sure that condensate drain trap is filled with wa ter to ensure proper drainage e Make sure that all tools and miscellaneous loose parts have been removed o 1 2 IN MAX MOTOR SHAFT MOTOR Fig 23 Fan Blade Clearance START UP Check for Refrigerant Leaks Proceed as follows to locate and repair a refrigerant leak and to charge the unit 1 Locate leak and make sure that refrigerant system pres sure has been relieved and reclaimed from both high and low pressure ports 2 Repair leak following accepted practices NOTE Install a filter drier whenever the system has been opened for repair 3 Add a small charge of R 22 refrigerant vapor to system and leak test unit 4 Evacuate and reclaim refrigerant from refrigerant system if additional leaks are not found 5 Charge unit with R 22 refrigerant using a volumetric charging cylinder or accurate scale Refer to unit rating plate for required charge Be sure to add extra refrigerant to compensate for internal volume of filter drier 23 Start Up Heating Section and Make Adjustments 4 CAUTION Complete the required procedures given in Pre Start Up section on page 22 before starting the unit Do not jumper any safety devices when operating the unit Make sure that burner orifices are properly aligned Un stable operation may occur when the burner orifices in the manifold are misaligned Follow the lighting instructions on the heating se
66. de skirt inwards until alternate clear ance holes align with base rails 3 Secure with screws removed in Step 1 Holes align with base rails To remove wood support under unit with base rail only loosen 4 screws above rigging holes and slide assembly out through rectangular hole Step 3 Field Fabricate Ductwork Secure all ducts to roof curb and building structure on vertical dis charge units Do not connect ductwork to unit For horizon tal applications unit is provided with flanges on the horizontal 10 openings All ductwork should be secured to the flanges In sulate and weatherproof all external ductwork joints and roof openings with counter flashing and mastic in accor dance with applicable codes Ducts passing through an unconditioned space must be insulated and covered with a vapor barrier If a plenum return is used on a vertical unit the return should be ducted through the roof deck to comply with ap plicable fire codes A minimum clearance is not required around ductwork Cabinet return air static shall not exceed 25 in wg Step 4 Provide Clearances The required mini mum operating and service clearances are shown in Fig 2 9 Adequate combustion ventilation and condenser air must be provided in accordance with section 5 3 Air for Combustion and Ventilation of the National Fuel Gas Code ANSI Z223 1 in Canada sections 7 2 7 3 or 7 4 or Can CGA Canadian Gas Association B149 Inst
67. des and ordinances Table 3 Maximum Gas Flow Capacity PE INTERNAL LENGTH OF PIPE ET N FIPE DIAMETER AE Ye e ae A 61 Y 200 170 118 110 103 93 77 72 a iaeo Tao oso 77o 600 S60 R 360 02 300 200 1 1 610 2100 1460 1180 090 900 810 750 690 650 620 550 500 460 430 Capacity of pipe in cu ft of gas per hr for gas pressure of 0 5 psig or less Pressure drop of 0 5 in wg based on a 0 60 specific gravity gas Refer to Table C 4 National Fire Protection Association NFPA 54 tThis length includes an ordinary number of fittings SUPPLY DUCT OPENING RETURN DUCT OPENING Fig 16 Supply and Return Duct Openings Fig 18 Vertical Duct Cover Removed UN Fig 17 Lance Location for Vertical Duct y Opening Cover Fig 19 Removal of Vertical Discharge Opening Cover 17 Rel VRAIS KMART ROSS RRR Fig 20 Vertical Discharge Cover Removed Adhere to the following criteria when selecting sizing and installing the duct system 1 Units are shipped with all 4 duct openings covered Re move appropriate panels for intended installation 2 Select and size ductwork supply air registers and return air grilles according to American Soc
68. e 2 ett 1 162 43 2 REQ D CLEARANCES FOR SERVICING in mm we 281 4 OPTIONAL SUPPLY gt 2 22 17 1 16 AIR OPENING Duet panel ox a cor tenida Hee a ch lc id Rote el 0 433 9 A A E E E 36 914 Side Opposite ducts iban atea TET 36 914 Compressor access 2 ee ee 36 914 4 43 16 Except for NEC requirements 122 2 REQ D CLEARANCES TO COMBUSTIBLE MAT L in mm Maximum extension of overhangs 48 1219 UR IOG gt S SLS ys Ges Oo ee Ste eS Re le Gh ay 14 356 D et Side OGM rie sos ace cen a Wiles ee ea aU Ae AO ee 2 51 Side opposite ducts 0 2 0048 14 356 Bottom of Unit ero y R Re R ds es o pt ep A Se ke e ed SSO Flue panel vindes E O E E T S 36 914 e c a NEC REQ D CLEARANCES in mm Between units control box side a o o u ooa a a 42 1067 Unit and ungrounded surfaces control box side 36 914 Unit and block or concrete walls and other grounded surfaces control box side oa ao a a 42 1067 BLOWER ACCESS PANEL BURNER AND CONTROL BOX RIGHT SIDE VIEW ACCESS PANEL COMPRESSOR ACCESS PANEL 3 4 NPT 19 0 DRAIN OUTLET FRONT VIEW ELECTRICAL UNIT CHARACTERISTICS 48SS048080 48SS048100 120 140 48SS060080 48SS060100 120 140 CENTER OF GRAVITY in mm 28 54 724 9 20 00 508 28 22 716 8 20 05 509 3 UNIT 4855048080 48SS048100 120 140 48SS060
69. ectrical power to the unit before changing blower speed Electrical shock can cause personal injury or death Airflow can be changed by changing the lead connections of the blower motor Unit 48SS two or 3 speed motors except size 030 are factory wired for low speed operation Unit 4855030 is fac tory wired for medium speed Units 48SX024 036 and 048 460 v two or 3 speed motors are factory wired for low speed units 48SX030 and 042 are factory wired for medium speed For 208 230 v and A O Smith 460 v Blower Motors The motor leads are color coded as follows 3 SPEED 2 SPEED black high speed black high speed blue medium speed red low speed red low speed To change the speed of the blower motor remove the fan motor speed leg lead from the blower relay BR This wire 1s attached to terminal BM for single phase and 3 phase units To change the speed remove and replace with lead for de sired blower motor speed Insulate the removed lead to avoid contact with chassis parts For 460 v GE Motors The motor leads are color coded as follows 3 SPEED 2 SPEED black high black high blue jumper blue jumper orange medium red low red low To change the speed of the blower motor remove fan mo tor speed lead from the blower relay BR and replace with the lead for the desired blower motor speed The motor speed lead is attached to terminal BM Insulate removed lead end to avoid contact with cha
70. ectrical service with a field supplied water proof disconnect switch mounted at or within sight from the unit Refer to the unit rating plate for maximum fuse circuit breaker size and minimum circuit amps ampacity for wire sizing See Tables 4A and 4B for electrical data The field supplied disconnect switch box may be mounted on the unit over the high voltage inlet hole when the standard power and low voltage entry points are used See Fig 2 9 for acceptable location Standard Power Entry Proceed as follows to complete the high voltage connections to the unit 1 Connect ground lead to chassis ground connection when using separate ground wire 2 Run high voltage leads into unit control box 3 Locate black and yellow wires connected to line side of contactor 4 Cut wires at partition where they exit control box 5 Strip back leads and connect to high voltage leads On 3 phase units blue wire is provided stripped back and ready to connect to high voltage lead See unit wiring la bel and Fig 21 Table 4A Electrical Data Unit 48SS VOLTAGE RANGE UNIT SIZE 48SS OUTDOOR FAN INDOOR FAN AWG 60 C Max RLA LRA FLA FLA mca Mocp SIZE 018 E 024 80 a 100 208 230 3 60 187 253 9 4 66 0 1 4 2 0 15 1 25 12 80 036 65 4603 60 414 508 56 400 08 14 92 10 14 100 208 230 1 60 187 253 20 4 104 0 1 4 4 0 30 9 50 8 100 460 360 414 506 64 42
71. efrigerant evacuate system and recharge Condenser coil dirty or restricted Dirty air filter Dirty condenser coil Refrigerant overcharged Air in system Condenser air restricted or air short cycling Low refrigerant charge Compressor valves leaking Restriction in liquid tube Clean coil or remove restriction Replace filter Clean coil Recover excess refrigerant Recover refrigerant evacuate system and recharge Determine cause and correct Check for leaks repair and recharge Replace compressor Remove restriction Excessive suction pressure Suction pressure too low High heat load Compressor valves leaking Refrigerant overcharged Dirty air filter Low refrigerant charge Metering device or low side restricted Insufficient evaporator airflow Temperature too low in conditioned area Outdoor ambient below 40 F Field installed filter drier restricted 48 Check for source and eliminate Replace compressor Recover excess refrigerant Replace filter Check for leaks repair and recharge Remove source of restriction Increase air quantity Check filter replace if necessary Reset thermostat Install low ambient kit Replace SYMPTOM Integrated control motor units 48SX048 060 208 230 v IFM does not run Integrated control motor units profile Cooling cont CAUSE Blower wheel not secured to shaft Insufficient voltage at motor Power connectors not properl
72. equired Suction Tube F Temperature chart An accurate superheat thermocouple or thermistor type thermometer a sling psychrometer and a gage manifold are required when using the superheat charging method for evalu ating the unit charge Do not use mercury or small dial type thermometers because they are not adequate for this type of measurement 4 CAUTION When evaluating the refrigerant charge an indicated ad justment to the specified factory charge must always be very minimal If a substantial adjustment is indicated an abnormal condition exists somewhere in the cooling system such as insufficient airflow across either coil or both coils Proceed as follows 1 Remove caps from low and high pressure service fittings 2 Using hoses with valve core depressors attach low and high pressure gage hoses to low and high pressure serv ice fittings respectively 3 Start unit in cooling mode and let unit run until system pressures stabilize 4 Measure and record the following a Outdoor ambient air temperature F db b Evaporator inlet air temperature F wb c Suction tube temperature F at low side service fitting d Suction low side pressure psig 5 Using Superheat Charging Table compare outdoor air temperature F db with evaporator inlet air temperature F wb to determine desired system operating superheat temperature See Tables 8A 8H and 9A 9F 6 Using Required Suction Tube F
73. er have an internal overload in the 24 v trans former If the overload trips allow 10 minutes for au tomatic reset Limit switch fault High temperature limit switch is Check the operation of the indoor evaporator fan LED 2 flashes open motor Ensure that the supply air temperature rise is in accordance with the range on the unit nameplate Flame sense fault The IGC sensed flame that Reset unit If problem persists replace control board LED 3 flashes should not be present 4 consecutive limit switch Inadequate airflow to unit Check operation of indoor evaporator fan motor and faults that supply air temperature rise agrees with range on LED 4 flashes unit nameplate information Ignition lockout Unit unsuccessfully attempted Check ignitor and flame sensor electrode spacing LED 5 flashes ignition for 15 minutes gaps etc Ensure that flame sense and ignition wires are properly terminated Verify that unit is obtaining proper amount of gas Induced draft motor fault IGC does not sense that induced Check for proper voltage If motor is operating check LED 6 flashes draft motor is operating the speed sensor plug IGC Terminal J2 connection Proper connection PIN 1 White PIN 2 Red PIN 3 Black Rollout switch fault Rollout switch has opened Rollout switch will automatically reset but IGC will LED 7 flashes continue to lockout unit Check gas valve operation Ensure that induced draft blower wheel is prope
74. estoy MIMO HSS or sia IGC Integrated Gas Control Field Control Wiring L Limit Switch i Field Power Wiring CAP 000 CAP sd NEC National Electrical Code Accessory or Optional Wiring OFM Outdoor Fan Motor wn TO Indicate Common Potential PWR Power Only Not to Represent Wiring NOTES 1 If any of the original wire furnished must be replaced it must be replaced with type 90 C wire or its equivalent 2 Use copper conductors only Fig 31 208 230 3 60 Wiring Diagram Units 48SX036 042 32 MAXIMUM WIRE Sey SI L SIZE 2 AWG pes ccs ts hc ARPA ADA BLU BLK YEL OFM BRN GRN YEL dh COMP EQUIP GND 230 VOLT OPERATION AS SHOWN FOR 208 VOLT OPERATION REVERSE REO AND ORN LEADS ON TRANSFORMER COOLING FAN LOGIC BR o T T 30 6 6 ENERGIZED DE ENERGIZED HEATING FAN LOGIC BR 0 45 T T 30 N BR N BR ENERGIZED ENERGIZED DE ENERGIZED DE ENERGIZED ICM BOARD SINGLE STAGE HEAT amp SINGLE STAGE COOL THERMOSTAT TYP BE A DI COMPONENT ALTERNATE ARRANGEMENT DISCONNECT sect TRAN c 160 SED SH ALS LEGEND AWG American Wire Gage QT Quadruple Terminal BR Blower Relay RS Rollout Switch C Contactor RT Red Terminal CAP Capacitor SEC Secondary COMP Compressor Motor TRAN Transformer CR Combustion Relay l l EQUIP Equipment fs Field Splice GAS SECTION Es Fuse Link GRI B FU Fue coe lt gt
75. event of flame rollout The switch is located above the main burn ers When the temperature at the auxiliary switch reaches the maximum allowable temperature the R control circuit trips closing the gas valve and stopping gas flow to the burn ers The indoor evaporator fan motor IFM and induced draft motor continue to run until switch is reset 26 Start Up Cooling Section and Make Adjustments A CAUTION Complete the required procedures given in the Pre Start Up section on page 22 before starting the unit Do not jumper any safety devices when operating the unit Do not operate the compressor when the outdoor tem perature is below 40 F unless accessory low ambient kit is installed Do not rapid cycle the compressor Allow 5 minutes be tween on cycles to prevent compressor damage CHECKING COOLING CONTROL OPERATION Start and check the unit for proper cooling control operation as follows 1 Place room thermostat SYSTEM switch in OFF position Observe that blower motor starts when FAN switch is placed in ON position and shuts down when FAN switch is placed in AUTO position 2 Place SYSTEM switch in COOL position and FAN switch in AUTO position Set cooling control below room tem perature Observe that compressor condenser fan and evapo rator blower motors start Observe that cooling cycle shuts down when control setting is satisfied The evaporator fan will continue to run for 30 seconds
76. ews securing the cover to the base pan and slide out the cover Discard the cover Fig 18 Remove supply duct cover located on duct panel Figure 16 shows duct cover removed Save duct cover and screws Remove and discard 2 screws which secure vertical dis charge opening cover to basepan Fig 19 Slide cover forward to disengage then tilt and remove cover through vertical discharge opening in bottom of unit Discard duct cover Fig 20 4 CAUTION Collect ALL screws that were removed Do not leave screws on rooftop as permanent damage to the roof may occur If unit ductwork is to be attached to vertical opening flanges on the unit basepan jackstand applications only do so at this time It is recommended that the basepan insulation around the perimeter of the vertical return air opening be se cured to the basepan with aluminum tape Applicable local codes may require aluminum tape to prevent ex posed fiberglass Cover both horizontal duct openings with the duct cov ers from Steps 2 and 5 Make sure opening is air and watertight After completing unit conversion perform all safety checks and power up unit NOTE The design and installation of the duct system must be in accordance with the standards of the NFPA for instal lation of nonresidence type air conditioning and ventilating systems NFPA 90A or residence type NFPA 90B and or local codes and residence type NFPA 90B and or local co
77. g all foreign matter from the pan Flush the pan and drain tube with clear water Do not splash water on the insulation motor wiring or air filter s If the drain tube is restricted clear it with a plumbers snake or similar probe device Ensure that the auxiliary drain port above the drain tube is also clear Condenser Fan A CAUTION Keep the condenser fan free from all obstructions to en sure proper cooling operation Never place articles on top of the unit Damage to unit may result 1 Remove 2 screws at bottom and 2 screws along sides of condenser air intake grille and remove plastic grille 2 Inspect the fan blades for cracks or bends 3 If fan needs to be removed loosen the setscrew and slide the fan off the motor shaft 4 When replacing fan blade position blade so that lead ing edge is 2 in in front of fan orifice See Fig 23 5 Ensure that setscrew engages the flat area on the motor shaft when tightening 6 Replace grille Electrical Controls and Wiring Inspect and check the electrical controls and wiring annually Be sure to turn off the gas supply and then the electrical power to the unit 47 Remove the control blower and compressor compart ment access panels to locate all the electrical controls and wiring Check all electrical connections for tightness Tighten all screw connections If any smoky or burned connections are noticed disassemble the connection clean all the parts
78. g connections and on unit base Detecting oil generally indicates a re frigerant leak Leak test all refrigerant tubing connec tions using electronic leak detector halide torch or liquid soap solution If a refrigerant leak is detected see Check for Refrigerant Leaks section on page 23 c Inspect all field and factory wiring connections Be sure that connections are completed and tight d Inspect coil fins If damaged during shipping and han dling carefully straighten fins with a fin comb 4 Verify the following conditions A CAUTION Do not purge gas supply into the combustion cham ber Do not use a match or other open flame to check for gas leaks Failure to follow this warning could result in an explosion causing personal injury or death a Before lighting the unit for the first time perform the following If the gas supply pipe was not purged be fore connecting the unit it will be full of air It is rec ommended that the ground joint union be loosened and the supply line be allowed to purge until the odor of gas is detected Never purge gas lines into a com bustion chamber Immediately upon detection of gas odor retighten the union Allow 5 minutes to elapse then light unit b Make sure that condenser fan blade is correctly posi tioned in fan orifice Leading edge of condenser fan blade should be 1 2 in maximum from plastic fan ori fice see Fig 23 Make sure that air filter s is in place
79. hecking or servicing refrigerant system Do not operate compressor or provide any electric power to unit unless compressor terminal cover is in place and secured Do not remove compressor terminal cover until all electrical sources are disconnected Relieve and reclaim all refrigerant from system be fore touching or disturbing anything inside terminal box if refrigerant leak is suspected around compres sor terminals Never attempt to repair soldered connection while re frigerant system is under pressure Do not use torch to remove any component System contains oil and refrigerant under pressure To re move a component wear protective goggles and pro ceed as follows Shut off gas supply and then electrical power to unit Relieve and reclaim all refrigerant from system using both high and low pressure ports Cut component connecting tubing with tubing cut ter and remove component from unit Carefully unsweat remaining tubing stubs when necessary Oil can ignite when exposed to torch flame Proceed as follows to inspect and prepare the unit for ini tial start up 1 Remove all access panels 2 Read and follow instructions on all WARNING CAU TION and INFORMATION labels attached to or shipped with unit 3 Make the following inspections a Inspect for shipping and handling damages such as bro ken lines loose parts disconnected wires etc b Inspect for oil at all refrigerant tubin
80. iety of Heating Refrigeration and Air Conditioning Engineers ASHRAE recommendations 3 Use flexible transition between rigid ductwork and unit to prevent transmission of vibration The transition may be screwed or bolted to duct flanges Use suitable gaskets to ensure weathertight and airtight seal 4 All units must have field supplied filters or accessory fil ter rack installed in the return air side of the unit Rec ommended sizes for filters are shown in Tables 1 and 2 5 Size all ductwork for maximum required airflow either heating or cooling for unit being installed Avoid abrupt duct size increases or decreases or performance may be affected 6 Adequately insulate and weatherproof all ductwork located outdoors Insulate ducts passing through uncon ditioned space and use vapor barrier in accordance with latest issue of Sheet Metal and Air Conditioning Contractors National Association SMACNA and Air Con ditioning Contractors of America ACCA minimum in stallation standards for heating and air conditioning sys tems Secure all ducts to building structure 7 Flash weatherproof and vibration isolate all openings in building structure in accordance with local codes and good building practices 18 Step 10 Install Electrical Connections A WARNING The unit cabinet must have an uninterrupted unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur Thi
81. ightly opening the ground joint union Table 1 Physical Data Unit 48SS UNIT SIZE 48SS 018040 024040 024060 030040 030060 030080 036060 gt H 00 gt NOMINAL CAPACITY ton pm 2 aaa s 3 OPERATING WEIGHT Ib Without Base Rail 272 303 315 320 332 332 336 336 348 348 With Optional Base Rail 296 327 339 344 356 356 360 360 372 372 COMPRESSORS Rotary Reciprocating Quantity 1 1 REFRIGERANT R 22 Charge Ib 2 60 2 75 2 75 3 40 3 40 3 40 4 30 4 30 4 30 4 30 REFRIGERANT METERING DEVICE Acutrol Pavice Orifice ID in 030 032 CONDENSER COIL Rows Fins in 17 2 17 Face Area sq ft 5 95 5 95 CONDENSER FAN Nominal Cfm 1700 1700 1700 1900 1900 1900 1900 1900 1900 1900 Diameter in 18 18 18 18 18 18 18 18 18 18 Motor Hp Rpm Ye 850 Vs 850 Vs 850 850 Vs 850 Vs 850 4 1050 14 1050 1050 1050 EVAPORATOR COIL Rows Fins in 3 15 3 15 3 15 Face Area sq ft 1 83 2 29 3 06 EVAPORATOR FAN Direct Drive Nominal Airflow Cfm 600 800 800 1000 1000 1000 1200 1200 1200 1200 Size in 10x10 10x 10 10x 10 10 x 10 10x 10 10x 10 10x 10 10x 10 10 x 10 10x 10 FURNACE SECTION Burner Orifice Qty drill size 3 32 Natural Gas pa Burner Orifice Qty drill size 3 42 Propane Gas RETURN AIR FILTERS in t Throwaway UNIT SIZE 48SS NOMINAL CAPACITY ton OPERATING WEIGHT Ib Without Base Rail With Optional Base Rail COMPRESSORS Quantity REFRIGERANT R 2
82. imbalance is more than 2 contact your local electric utility company immediately THERMOSTAT TYPICAL POWER SUPPLY SPLICE BOX FIELD SUPPLIED FUSED DISCONNECT LOW VOLTAGE POWER LEADS SEE UNIT WIRING LABEL LEGEND Field Control Voltage Wiring eeee Field High Voltage Wiring NOTE Use blue wire for 3 phase units only Fig 21 High and Control Voltage Connections Alternate Power Entry 1 Remove knockouts in fixed compressor panel located on duct panel side of unit 2 Route high voltage leads into high voltage terminal box 3 Connect ground wire to green yellow wire using field supplied splice 4 Connect power wires to unit high voltage leads 5 On 3 phase units locate blue wire projecting from com pressor junction box Cut wire at partition and route into high voltage junction box through grommet in back of junction box 6 On 3 phase units strip back blue lead and connect to third leg of the power wires SPECIAL PROCEDURES FOR 208 V OPERATION 44 WARNING Make sure that the gas supply then the power supply to the unit is switched OFF before making any wiring changes Electrical shock can cause personal injury or death 1 Disconnect the orange transformer primary lead from the contactor See unit wiring label 2 Remove the tape and wirenut from the terminal on the end of the red transformer primary lead 3 Save the wirenut 4 Connect the red lead to the contactor ter
83. ional base rail as shown in Fig 13 Op erating weights are shown in Tables 1 and 2 Refer to rig ging instructions on unit Protective wood support must be removed from unit be fore unit is mounted to curb Remove 4 screws that secure support above rigging holes in rails Slide support out through rectangular hole in rail See Fig 13 Step 6 Connect Condensate Drain NOTE When installing condensate drain connection be sure to comply with local codes and restrictions Model 48SS SX disposes of condensate water through a 24 in NPT fitting which exits through the compressor access panel See Fig 2 9 for location Condensate water can be drained directly onto the roof in rooftop installations where permitted or onto a gravel apron in ground level installations Install a field supplied conden sate trap at end of condensate connection to ensure proper drainage Make sure that the outlet of the trap is at least 1 in lower than the drain pan condensate connection to pre vent the pan from overflowing See Fig 14 Prime the trap with water When using a gravel apron make sure it slopes away from the unit If the installation requires draining the condensate water away from the unit install a 2 in trap at the condensate con nection to ensure proper drainage See Fig 14 Make sure that the outlet of the trap is at least 1 in lower than the drain pan condensate connection to prevent the pan from over flowing Prime the trap
84. ircuit Determine cause and correct Check wiring diagram and rewire correctly Lower thermostat setting below room temperature Check wiring and repair or replace Compressor motor burned out seized or internal overload open Defective run start capacitor overload start relay One leg of 3 phase power dead Scroll compressor is rotating in the wrong direction Refrigerant overcharge or undercharge Determine cause Replace compressor Determine cause and replace Replace fuse or reset circuit breaker Determine cause Correct the direction of rotation by reversing the 3 phase power leads to the unit Shut down unit to allow pressures to equalize Recover refrigerant evacuate system and recharge to capacities shown on nameplate Defective compressor Insufficient line voltage Blocked condenser Defective run start capacitor overload or start relay Replace and determine cause Determine cause and correct Determine cause and correct Determine cause and replace Defective thermostat Faulty condenser fan motor or capacitor Restriction in refrigerant system Dirty air filter Unit undersized for load Thermostat set too low Low refrigerant charge Leaking valves in compressor Air in system Replace thermostat Replace Locate restriction and remove Replace filter Decrease load or increase unit size Reset thermostat Locate leak repair and recharge Replace compressor Recover r
85. irty air filter Gas input to furnace too low Unit undersized for application Run continuity check Replace wire if necessary Check flame ignition and sense electrode positioning Adjust as necessary 1 Check gas line for air Purge as necessary NOTE After purging gas line of air wait at least 5 minutes for any gas to dissipate before attempt ing to light unit 2 Check gas valve Clean or replace filter as necessary Check gas pressure at manifold Match with that on unit nameplate Replace with proper unit or add additional unit Restricted airflow Blower speed too low Limit switch cycles main burners Clean or replace filter Remove any restriction Use faster speed tap if available or install alternate motor Check rotation of blower thermostat heat antic ipator settings temperature rise of unit Adjust as necessary Poor flame characteristics Incomplete combustion results in Aldehyde odors carbon monox ide sooting flame floating flame 49 1 Tighten all screws around burner compartment 2 Cracked heat exchanger Replace 3 Unit overfired Reduce input change orifices or adjust gas line or manifold pressure 4 Check burner alignment LED Troubleshooting Error Code SYMPTOM CAUSE REMEDY Hardware failure Loss of power to control module Check 5 amp fuse on IGC power to unit 24 v circuit LED OFF IGC breaker and transformer Units without a 24 v circuit break
86. is lo ing plate to blower housing See Fig 34 cated in the control box Module contains a self diagnostic LED During servicing refer to label diagram for LED 3 Slide the motor and blower wheel assembly out of the blower housing See Fig 36 Clean the blower wheel mterpretation l l If additional cleaning is required continue with Steps 4 _ Tf lockout occurs unit may be reset by either momentarily and 5 interrupting power supply to unit or turning selector switch 4 To remove blower remove 2 setscrews See Fig 36 to OFF position at the thermostat Main Burners At the beginning of each heating sea son inspect for deterioration or blockage due to corrosion or other causes Observe the main burner flames and adjust if necessary 4 CAUTION When servicing gas train do not hit or plug orifice spuds REMOVAL OF GAS TRAIN OPERATING INSTRUCTIONS LOCATED ON INSIDE OF THIS PANEL 1 Shut off manual gas valve 2 Shut off power to unit BURNER gt ACCESS 3 Remove burner access panel See Fig 35 PANEL E C E 4 Disconnect gas piping at unit gas valve 5 Remove wires connected to gas valve Mark each wire 6 Remove ignitor and sensor wires at the ignitor module 7 Remove the mounting screw that attaches the burner rack to the basepan See Fig 34 8 Slide the burner rack out of the unit See Fig 34 and 37 9 To reinstall reverse the procedure outlined above NS
87. it through the access hole provided The gas connection to the unit is made to the 1 2 in FPT gas inlet on the manual shutoff or gas valve Install a gas supply line that runs to the heating section Refer to Table 3 and the NFGC for gas pipe sizing Do not use cast iron pipe It is recommended that a black iron pipe is used Check the local utility for recommendations con cerning existing lines Size gas supply piping for 0 5 in wg maximum pressure drop Never use pipe smaller than the Y2 in FPT gas inlet on the unit gas valve For natural gas applications the gas pressure at unit gas connection must not be less than 4 0 in wg or greater than 13 in wg while the unit is operating For propane applica tions the gas pressure must not be less than 4 0 in wg or greater than 13 in wg at the unit connection An in NPT plugged tapping accessible for test gage connection must be installed immediately upstream of the gas supply connection to the furnace When installing the gas supply line observe local codes pertaining to gas pipe installations Refer to the NFGC ANSI Z223 1 1988 NFPA latest edition in Canada CAN CGA B149 1 2 M86 In the absence of local building codes adhere to the following pertinent recommendations 1 Avoid low spots in long runs of pipe Grade all pipe Ya inch in every 15 ft to prevent traps Grade all hori zontal runs downward to risers Use risers to connect to heating section and to meter 2 Pr
88. l Code ce D E ROU OFM Outdoor Fan Motor y ORO MSP resent vung NOTES 1 If any of the original wire furnished must be replaced it must be replaced with type 90 C wire or its equivalent 2 Use copper conductors only Fig 27 208 230 3 60 Wiring Diagram Units 48SS030 060 28 BLK YEL OFM YEL YEL CAP2 YEL fo sRN aT RN YEL 4 MAXIMUM WIRE EPL a n i SIZE 2 AWG coe m FP EQUIP END BLK BL BLU COMP YEL IFM COOLING FAN LOGIC BR RN YEL 0 T T 30 6 G IDM ENERGIZED DE ENERGIZED HEATING FAN LOGIC BRN C BR 0 45 T T 30 N BR N H ENERGIZED ENERGIZED DE ENERGIZED OE ENERGIZED SINGLE STAGE HEAT amp SINGLE STAGE MAIN YEL Ol COOL THERMOSTAT TYP COMMON 24V SPLICE BOX BRN 24V National Electrical Code Outdoor Fan Motor Sn Power To Indicate Common Potential Only Not to Represent Wiring COMPONENT TRAN ARRANGEMENT RN BRN C LEGEND AWG American Wire Gage QT Quadruple Terminal BR Blower Relay RS Rollout Switch C Contactor TRAN Transformer CAP Capacitor l l CH Crankcase Heater Ls Field Splice cee com ressor Motor Combustion Rela EQUIP Equipment y LO Terminal Marked S Flame Sensor f FU Fuse O Terminal Unmarked GND Ground GVR Gas Valve Relay 0 Splice HV TRAN Hah Voltage Transt High Voltage Transformer lice Mark Ignitor L Splice Marked on nduced Dra Motor
89. minal from which the orange lead was disconnected 5 Using the wirenut removed from the red lead insulate the loose terminal on the orange lead 6 Wrap the cover with electrical tape so that the metal ter minal cannot be seen CONTROL VOLTAGE CONNECTIONS NON INTEGRATED CONTROL MOTOR NON ICM UNITS Locate the room thermostat on an inside wall in the space to be conditioned where it will not be subjected to either a cooling or heating source or direct exposure to sunlight Mount the thermostat 4 to 5 ft above the floor 21 NOTE Do not use any type of power stealing thermostat Unit control problems may result Use no 18 American Wire Gage AWG color coded in sulated 35 C minimum wires to make the control voltage connections between the thermostat and the unit If the ther mostat is located more than 100 ft from the unit as mea sured along the control voltage wires use no 16 AWG color coded insulated 35 C minimum wires Standard Connection Remove knockout hole located in the flue panel adjacent to the control access panel See Fig 2 9 Remove the rubber grommet from the installer s packet included with unit and install grommet in the knock out opening Provide a drip loop before running wire through panel Run the low voltage leads from the thermostat through the inlet hole and into unit low voltage splice box Locate five 18 gage wires leaving control box These low voltage connection lead
90. ng tUnit air delivery is outside of operating range 41 NOTE Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12 000 Btuh of rated cooling capacity Evaporator coil icing may occur at airflows below this point Water blow off may occur at airflows above 450 cfm per 12 000 Btuh of rated cooling capacity Table 12 Dry Coil Air Delivery Downflow Discharge at 230 and 460 V Unit 48SS Deduct 10 from Cfm and Watts for 208 V Operation UNIT MOTOR AIR EXTERNAL STATIC PRESSURE in wg 48ss SPEED DELIVERY oo or 02 03 04 os 06 07 os 09 10 T Waits i Sn f an L_Watts F Cim 334 123 128 9 816 658 461 246 17 F Watts t 285 284 282 278 274 270 261 251 244 230 S Cim 304 024 og Waits 283 030 Cm ton 92 9 906 88 771 703 597 492 387 nan Wais 341 E Sn 47 L Watts t 460 439 423 398 379 349 322 297 270 246 ow Cfm t 1191 1136 1081 1005 907 795 687 579 471 349 SAAT aps Watt 275 Cim 359 con Ves 398 Cim 509 ae Waits F 042 Cim F con Mi F Sn f t t t 018 E Was TH 7ea 746 708 6 6 609 568 516 ow Cfm t 1995 1901 1822 1730 1580 1477 1319 1178 t 048 909 esa s s 1 687 039 t t t 2018 1896 1814 1729 1582 1380 1270 t t t 983 950 923 885 845 804 751 697 665 633 1175 de ae Waits 742 Cim 1282 Hiah Watts T 1284 1201 1166 1131 1092 1053 1001 950 907 864 9 Cfm t 2167 2108 2038 19
91. ng amp Refrigeration Institute rated cool ing airflow or the heating airflow at a velocity of 300 ft min for throwaway type or 450 ft min for high capacity type For non standard air filters air filter pressure drop must not exceed 0 08 in wg Sq inch Filter is mounted external to unit 14 1995 10x 10 1995 10x10 1995 10 x 10 1995 10 x 10 3 32 3 40 24x 24 24x 24 24x 24 24x 24 24x 30 24x 30 ssa sie 24x30 24 x 30 24x 30 960 Table 2 Physical Data Unit 48SX UNIT SIZE 48SX 024040 024060 020040 020060 030080 ae 00 20 NOMINAL CAPACITY ton fos a 2 m m OPERATING WEIGHT Ib Without Base Rail 333 345 336 348 348 366 366 378 378 With Optional Base Rail 357 369 360 372 372 390 390 402 402 COMPRESSORS Scroll Quantity 1 REFRIGERANT R 22 Charge Ib 3 9 3 9 4 5 4 5 4 5 5 4 5 4 5 4 5 4 REFRIGERANT METERING DEVICE see aoe Orifice ID in CONDENSER COIL Rows Fins in 2 17 Face Area sq ft 7 0 CONDENSER FAN Nominal Cfm 2200 2200 2200 2200 2200 2200 2200 2200 2200 Diameter in Motor Hp Rpm 20 Ya 1100 20 Ya 1100 20 20 20 20 20 Ya 1100 Ya 1100 Ya 1100 Ya 1100 Ya 1100 20 Ya 1100 20 Ya 1100 EVAPORATOR COIL Rows Fins in Face Area sq ft EVAPORATOR FAN Nominal Airflow Cfm Size in FURNACE SECTIONt Burner Orifice Qty drill size Natural Gas Burner Orifice Qty drill size Propane Gas RETURN AIR FILT
92. ng value of 1050 Btu ft at 0 65 specific gravity or propane gas with a heating value of 2500 Btu ft at 1 5 specific gravity For elevations above 2000 ft reduce input 4 for each 1000 ft above sea level When the gas supply being used has a different heating value or specific gravity refer to national and local codes or contact your distributor to determine the required orifice size 4 CAUTION These units are designed to consume the rated gas in puts using the fixed orifices at specified manifold pres sures as shown in Table 5 DO NOT REDRILL THE ORIFICES UNDER ANY CIRCUMSTANCES ADJUST GAS INPUT The gas input to the unit is determined by measuring the gas flow at the meter or by measuring the manifold pressure Measuring the gas flow at the meter is recommended for natural gas units The mani fold pressure must be measured to determine the input of propane gas units Table 5 Rated Gas Inputs at Indicated Manifold Pressures NUMBER GAS SUPPLY PRESSURE in wg MANIFOLD PRESSURE NATURAL GAS PROPANE E es mm ans Max Natural Propane Size Btuh t L Btuh t 018040 024040 030040 1 ACE EA po 130 35 3 1 40 000 40 000 024060 030060 036060 EA SEE 56 000 54 000 EE 036080 042080 4 0 13 4 0 34 80000 42 000 80 000 036100 042100 048100 060100 EMT rro ESE OE 95 000 036120 042120 048120 060120 115 000 048140 060140 133 000 When a unit is converted
93. o the thermostat Alternate Connection 24 v Remove knockout in the flue panel adjacent to the control access panel Remove the rub ber grommet from the installer s packet included with unit and install grommet in the knockout opening Provide a drip loop before running wire through panel Run the low voltage leads from the thermostat through the inlet hole and into the unit low voltage splice box Connecting to Easy Select Interface Board The Easy Se lect interface board is located in the control box area The Easy Select interface board is factory wired to the motor and factory default selections are preset Locate the five 18 gage thermostat lead wires of plug as sembly 1 PL1 attached to the Easy Select interface board See Fig 22 and wiring diagrams for units 48SX048 and 060 on pages 31 and 33 These low voltage connection leads are identified by the colors red green yellow brown and white Cut the wires between the 2 wire ties approximately 4 in from the plug Connect low voltage leads to the ther mostat Secure all cut wires in the control and splice boxes so they do not interfere with the proper operation of the unit MB Lh pa PL aif Su Soo xs gt 3 ue aa cy S AMP FUSE _ LEGEND IFO Indoor Evaporator Fan On JW Jumper Wire Fig 22 Easy Select Interface Board HEAT ANTICIPATOR SETTING The room thermostat heat anticipator must be properly adj
94. om of UNIE eteran ao a e li A a e a R 0 PUB PARO De a a E R ae A as 36 914 NEC REQ D CLEARANCES in mm Between units control box side o 42 1067 Unit and ungrounded surfaces control box side 36 914 Unit and block or concrete walls and other grounded surfaces control box side 42 1067 1 1 8 28 6 DIA POWER ENTRY 7 8 22 2 DIA CONTROL ENTRY 1 13 18 45 3 26 9 16 674 9 1 5 8 41 3 DIAZ TI e NeT FLUE PANEL GAS CONNECTION REAR VIEW CORNER WEIGHT Ib kg 82 37 LEGEND CG Center of Gravity MAT L Material COND Condenser NEC National Electrical Code Low Voltage REQ D Required NOTES 1 Clearances must be maintained to prevent recirculation of air from outdoor fan discharge 2 Adequate clearance around air openings into combustion chamber must be provided Fig 4 48SS048 060 Without Base Rail Unit Dimensions 45 1 27 1155 7 C COND COIL 39 7 B ca EAS EZ 7 E ZA YN R SO GM OPTIONAL RETURN AIR OPENING 1 1 4 31 75 ALTERNATE POWER ENTRY VAP 0 7 8 EVAP COIL ACCESS 22 23 FLUE HOOD C ALTERNATE LY ENTRY THT TTT patni EP coit 49 9 RETURN 1320 8 1259 3 S G EUA A T S La 1 16 10 ser o E SUPPLY 7 68 d d BY y 29 6 253 8 A lo y LEFT SIDE VIEW 34 9 D 1 13 16 A aan el lor 11 167 46 2 dos l
95. ompensation etc MODE FAN ONLY COOLING HEATING LO Adjust 10 HI Adjust 10 AC HP TIME DELAY GRY Four motor operation delay options are provided to customize system operation See table below OPTION TERMINAL DESCRIPTION Used when it is desirable to allow system coils time to heat up or cool down prior to airflow Enhances system efficiency Preset factory default setting for 48SX Used for servicing or when other components are used to perform a delay func tion e g integrated gas control Enhances system efficiency Enhances system efficiency 30 Sec On 60 Sec Off Delay Profile No Delay Option 30 Sec Off Delay 45 Sec Off Delay Table 8A Superheat Charging Table 48SS018 EVAP AIR CFM TEMP F 600 AIR ENT COND Evap Air Ewb F s s 58 6 62 6 66 68 70 76 65 sm 173 185 196 208 242 277 285 203 203 293 203 203 70 SPH 138 149 161 173 207 241 287 273 era 273 273 273 75 10 2 11 4 12 5 13 7 17 1 20 6 22 9 25 2 25 2 25 2 25 2 25 2 a5 SPH 61 62 65 66 100 135 173 211 226 241 256 271 90 N K 5 0 8 1 11 4 15 2 19 0 20 5 22 0 23 5 25 0 too sPH_ gt gt a aa 149 172 195 217 240 105 sPH RS ARA gt 5 91 129 159 189 219 249 mo sm er ms es ee me 228 ms sm AAA AA 88 18 48 178 28 LEGEND Do not attempt to charge sy
96. otect all segments of piping system against physical and thermal damage Support all piping with appropriate straps hangers etc Use a minimum of one hanger every 6 ft For pipe sizes larger than Y in follow recommendations of national codes 3 Apply joint compound pipe dope sparingly and only to male threads of joint when making pipe connections Use only pipe dope that is resistant to action of liquefied petroleum gases as specified by local and or national codes Never use Teflon tape 4 Install sediment trap in riser leading to heating section per Fig 15 This drip leg functions as a trap for dirt and condensate 5 Install an accessible external manual main shutoff valve in gas supply pipe within 6 ft of heating section 6 Install ground joint union close to heating section be tween unit manual shutoff and external manual main shut off valve 7 Pressure test all gas piping in accordance with local and national plumbing and gas codes before connecting pip ing to unit NOTE Pressure test the gas supply system after the gas supply piping is connected to the gas valve The supply piping must be disconnected from the gas valve during the testing of the piping systems when test pressure is in excess of 0 5 psig Pressure test the gas supply piping system at pressures equal to or less than 0 5 psig The unit heating section must be isolated from the gas piping system by closing the external main manual shutoff valve and sl
97. pecifications or designs without notice and without incurring obligations PC 111 Catalog No 564 955 Printed in U S A Book 1 4 Tab taj6a Form 48SS SX 10SI Pg CL 1 1 97 Replaces 48SS SX 8SI CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE
98. r and Motor NOTE Motors without oilers are prelubricated Do not at tempt to lubricate these motors For longer life operating economy and continuing effi ciency clean accumulated dirt and grease from the blower wheel and motor annually Lubricate the motor every 5 years if the motor is used in termittently thermostat FAN switch in AUTO position or every 2 years if the motor is used continuously thermostat FAN switch in ON position 44 WARNING Turn off the gas supply then disconnect and tag elec trical power to the unit before cleaning and lubricating the blower motor and wheel Failure to adhere to this warning could cause personal injury or death To clean and lubricate the blower motor and wheel 1 Remove and disassemble blower assembly as follows a Remove blower access door b On standard non ICM units disconnect motor lead from blower relay BR Disconnect yellow lead from ter minal L2 of the contactor c On all units remove blower assembly from unit Re move screws securing blower to gas partition and slide assembly out Be careful not to tear insulation in blower compartment d Ensure proper reassembly by marking blower wheel and motor in relation to blower housing before dis assembly e Loosen setscrew s that secures wheel to motor shaft remove screws that secure motor mount brackets to 45 housing and slide motor and motor mount out of housing 2 Lubricate motor as follows a
99. r if the heating value of gas is not known EXAMPLE Assume that the size of test dial is 1 cu ft one revolution takes 30 seconds and the heating value of the gas is 1050 Btu ft Proceed as follows 1 30 seconds to complete one revolution 2 3600 30 120 3 120 x 1 120 ft of gas flow hr 4 120 x 1050 126 000 Btuh input If the desired gas input is 120 000 Btuh only a minor change in the manifold pressure is required Observe manifold pressure and proceed as follows to ad just gas input 1 Remove cover screw over regulator adjustment screw on gas valve 2 Turn regulator adjustment screw clockwise to increase gas input or turn regulator adjustment screw counterclock wise to decrease input Manifold pressure must be be tween 3 4 and 3 6 in wg 24 W MANIFOLD PIPE PLUG Fig 24 Burner Assembly A WARNING Unsafe operation of the unit may result if manifold pressure is outside this range Personal injury or unit damage may result Replace cover screw cap on gas valve Turn off gas supply to unit Remove manometer from pres sure tap and replace pipe plug on gas valve Turn on gas to unit and check for leaks Measure Manifold Pressure Propane Units The main burner orifices on a propane gas unit are sized for the unit rated input when the manifold pressure reading matches the level specified in Table 5 Proceed as follows to adjust gas input on a propane gas
100. rance around air openings into combustion chamber must be 485X042100 120 26 50 673 0 21 24 539 6 17 66 448 6 provided 48SX048080 28 25 717 6 20 04 509 0 17 66 448 6 NEC REQ D CLEARANCES in mm 48SX048100 120 140 28 16 715 3 20 08 510 0 17 66 448 6 GS E SrA SL E E ae A E Ca 48SX060080 28 18 715 6 20 19 5128 17 66 448 6 Unit and blocicor concreto walis and other grounded L gt 48SX060100 120 140 27 79 705 9 20 23 513 8 17 66 448 6 surfaces control box side 42 1067 Fig 9 48SX042 060 With Optional Base Rail Unit Dimensions 9 RECEIVING AND INSTALLATION Step 1 Check Equipment IDENTIFY UNIT The unit model number and serial num ber are stamped on unit identification plate Check this information against shipping papers and job data INSPECT SHIPMENT Inspect for shipping damage while unit is still on shipping pallet If unit appears to be damaged or is torn loose from its anchorage have it examined by trans portation inspectors before removal Forward claim papers directly to transportation company Manufacturer is not re sponsible for any damage incurred in transit Check all items against shipping list Immediately notify the nearest Carrier Air Conditioning office if any item is missing To prevent loss or damage leave all parts in original pack ages until installation Step 2 Provide Unit Support ROOF CURB Install accessory roof curb in accordance wi
101. rly secured to motor shaft Reset unit at unit disconnect Internal control fault Microprocessor has sensed an If error code is not cleared by resetting unit power LED 8 flashes error in the software or hardware replace the IGC IMPORTANT Refer to Heating troubleshooting chart for addi 44 WARNING tional troubleshooting analysis If the IGC must be replaced be sure to ground yourself to dis sipate any electrical charge that may be present before han LEGEND dling new control board The IGC is sensitive to static electricity IGC Integrated Gas Unit Controller and may be damaged if the necessary precautions are not taken LED Light Emitting Diode PACKAGED SERVICE TRAINING Our packaged service training programs provide an excellent way to increase your knowledge of the equipment discussed in this manual Product programs cover e Unit Familiarization e Maintenance e Installation Overview e Operating Sequence A large selection of product theory and skills programs is available All programs include a video cassette and or slides and a companion booklet Use these for self teaching or to conduct full training sessions For a free Service Training Material Catalog STM call 1 800 962 9212 Ordering instructions are included Copyright 1997 Carrier Corporation Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations
102. s can be identified by the colors red green yellow brown and white See Fig 21 Ensure the leads are long enough to be routed into the low voltage splice box located below right side of control box Cut wires at the point where they exit control box do NOT cut yellow wire on 48SX024 030 units Stripped yellow wire is located in connection box Route leads through hole in bottom of control box and make low voltage connections as shown in Fig 21 Secure all cut wires so that they do not interfere with operation of unit Alternate Connection Remove knockout in compressor fixed panel located below high voltage knockout Remove the rub ber grommet from the installer s packet included with unit and install grommet in the knockout opening Route ther mostat wires through grommet providing drip loop at panel Connect low voltage leads as shown in Fig 21 On 48SX024 and 030 units the yellow wire originating from discharge thermostat of compressor must be cut and routed into low voltage section of junction box CONTROL VOLTAGE CONNECTIONS INTEGRATED CONTROL MOTOR ICM UNITS Routing Control Power Wires 24 v Remove knockout in the compressor fixed access panel located below the high voltage knockout Remove the rubber grommet from the in staller s packet included with unit and install grommet in the knockout opening Route thermostat wires through grom met providing drip loop at panel Connect low voltage leads t
103. s ground may consist of an electrical wire connected to the unit ground lug in the control compartment or conduit ap proved for electrical ground when installed in accor dance with NEC National Electrical Code ANSI NFPA latest edition in Canada Canadian Electrical Code CSA Canadian Standards Association C22 1 and local electrical codes Do not use gas piping as an elec trical ground Failure to adhere to this warning could result in personal injury or death 4 CAUTION Failure to follow these precautions could result in dam age to the unit being installed 1 Make all electrical connections in accordance with NEC ANSI NFPA latest edition and local electrical codes gov erning such wiring In Canada all electrical connections must be in accordance with CSA standard C22 1 Cana dian Electrical Code Part 1 and applicable local codes Refer to unit wiring diagram 2 Use only copper conductor for connections between field supplied electrical disconnect switch and unit DO NOT USE ALUMINUM WIRE 3 Be sure that high voltage power to unit is within oper ating voltage range indicated on unit rating plate 4 Do not damage internal components when drilling through any panel to mount electrical hardware conduit etc On 3 phase units ensure phases are balanced within 2 Con sult local power company for correction of improper volt age and or phase imbalance HIGH VOLTAGE CONNECTIONS The unit must have a separate el
104. ssis parts On 3 speed motors only connect orange lead to terminal BM of BR To select high speed on 460 v GE motors separate the black female QC from the blue lead male QC and connect the black lead to the BR Insulate the blue lead to avoid contact with any chas sis parts For Integrated Control Motors ICM To configure the 48SX unit move the 5 Easy Select board wires to the terminals which control the airflow Refer to the Easy Select interface board Fig 22 located next to the terminals and to Fig 30 and 32 Perform the configuration following steps for basic system AUX HEAT RANGE VIO The airflow for unit 48SX is preset at the factory The airflow selection must not be set at a setting lower than the default Refer to Table 15 for airflow and gas heat input for terminals 1 4 AC HP SIZE BLU The preset factory default selection for AC HP SIZE air conditioner heat pump is set to 400 cfm ton The selection pins are configured for 350 cfm ton and 400 cfm ton TYPE ORN The TYPE is a preset factory default se lection The preset factory default setting is AC for the 48SX units Default setting should not be altered AC HP CFM ADJUST BLK The preset factory default selection is MED Selections HI and LO will adjust the air flow supplied for all operational modes see following table The selection options allow installer to adjust airflow to meet such individual needs as noise and static c
105. stem under these conditions refrig Ewb Entering Wet Bulb SPH Superheat at Compressor F erant slugging may occur Table 8B Superheat Charging Table 4855024 EVAP AIR CFM TEMP F 800 AIR ENT COND Evap Air Ewb F sa s 88 0 62 68 6 6 7 72 4 76 6 sm 182 190 199 207 225 242 251 259 266 272 279 288 70 SPH 171 176 181 186 204 221 230 239 249 260 27 1 28 1 75 SPH 160 162 164 166 183 201 210 218 233 248 202 277 so SPH 198 147 146 145 163 180 107 213 224 235 246 28 e sPH 137 133 129 125 143 160 184 207 215 223 231 238 so sPH_ 111 109 107 104 122 139 163 187 199 210 222 204 SPH 85 s4 84 84 101 no 143 166 182 198 214 230 100 sem 73 75s 77 78 88 99 122 146 166 188 206 228 105 SPH 62 66 69 73 78 78 102 125 149 173 197 221 mo sm 53 55 ss 81 108 188 161 189 217 mopsa EY ALO A AA E LEGEND Do not attempt to charge system under these conditions refrig Ewb Entering Wet Bulb SPH Superheat at Compressor F erant slugging may occur Table 8C Superheat Charging Table 4855030 EVAP AIR CFM Ee 1000 COND Evap Air Ewb F Psa s 58 60 62 64 66 68 70 74 7 65 SPH 142 1581 161 171 192 2
106. th instructions shipped with curb See Fig 10 for roof curb dimensions Install insulation cant strips roofing and flash ing Ductwork must be attached to curb IMPORTANT The gasketing of the unit to the roof curb is critical for a watertight seal Install gasketing material supplied with the roof curb Improperly ap plied gasketing can also result in air leaks and poor unit performance Curb should be level to within 1 4 inch This is necessary for unit drain to function properly Refer to accessory roof curb installation instructions for additional information as required SLAB MOUNT Place the unit on a solid level concrete pad that is a minimum of 4 in thick with 2 in above grade The slab should be flush on the front of the unit to allow condensate drain installation and should extend 2 in on the three remaining sides of the unit See Fig 11 Install a 6 in gravel apron in front of condenser air inlets to prevent ob struction of airflow by grass or shrubs Do not secure the unit to the slab except when required by local codes FLUSH MOUNT Place side of unit with duct panel flush against transition On units with optional base rails the skirt on duct panel side of unit can be removed or relocated to allow unit to be mounted flush against transitions that ex tend below basepan of unit To move skirt proceed as follows 1 Remove 4 screws holding skirt to base rail Retain screws 2 Remove skirt or sli
107. usted to ensure proper heating performance Set the heat anticipator using an am meter between the W and R terminals to determine the exact required setting NOTE For thermostat selection purposes use 0 18 amp for the approximate required setting Failure to make a proper heat anticipator adjustment will result in improper operation discomfort to the occupants of the conditioned space and inefficient energy utilization how ever the required setting may be changed slightly to provide a greater degree of comfort for a particular installation TRANSFORMER PROTECTION The unit transformer protection may be one of 2 types The first transformer type may contain an auto reset over current protector for control circuit protection If this device trips it may reset without warning starting the heating or cooling section of this product Use caution when servicing 1f overcurrent protector continues to trip there is a problem in the low voltage electrical circuit such as an electrical short ground or transformer overload Disconnect power correct the condition and check for normal unit operation The second transformer type is of the energy limiting type It is set to withstand a 30 second overload or shorted secondary condition 22 PRE START UP 44 WARNING Failure to observe the following warnings could result in serious personal injury 1 Follow recognized safety practices and wear protec tive goggles when c
108. ution to prevent damage when moving the unit Unit must remain in an upright po sition during all rigging and moving operations The unit must be level for proper condensate drainage therefore the ground level pad or accessory roof curb must be level be fore setting the unit in place When a field fabricated sup port is used be sure that the support is level and properly supports the unit PART NUMBER A CURS CPRECURBOOZADD T S L Woo CPRFCURBO03A00 14 356 FLAT CURB ES o NOTES Roof curb must be set up for unit being installed Seal strip must be applied as required for unit being installed Dimensions in are in millimeters Roof curb is made of 16 gage steel Attach ductwork to curb flanges of duct rest on curb Service clearance 4 ft on each side 2 Direction of airflow Insulated panels 1 in thick fiberglass 1 Ib density POWER AND GAS ENTRY gt 17 9 16 SUPPLY AIR 1446 OPENING RETURN AIR OPENING y SUPPLY AIR RETURN AIR S N N N N NNNNA 39 3 4 172 013 1010 1 2 13 279 SCREW CLEARANCE THIS BRACKET MUST BE REMOVED BEFORE INSTALLATION THIS PANEL MUST BE REMOVED BEFORE INSTALLATION Y SEAL STRIP SUPPLIED WITH CURB CONLY FOR UNITS WITH BASE RAILS COUNTER FLASHING FIELO SUPPLIED ROOFING FELT FIELD SUPPLIED CANT STRIP Pi RETURN AIR F
109. ved range Refer to Evaporator Airflow and Airflow Adjustments sec tion on page 35 to adjust heating airflow when required Table 6 Air Delivery Cfm at Indicated Temperature Rise and Rated Heating Input sy TEMPERATURE RISE F Buh 20 25 so 35 40 45 so 85 40 000 56 000 833 80 000 2778 2222 1852 1587 1389 1235 1111 1010 926 95 000 2315 1984 1736 1543 1389 1263 1157 1068 992 120 000 4167 136 000 4029 2014 1831 1679 1549 1439 1343 NOTE Dashed areas do not fall within the approved temperature rise range of the unit 25 HEATING SEQUENCE OF OPERATION See Fig 26 33 and unit wiring label On a call for heating terminal W of the thermostat is energized starting the induced draft motor When the hall effect sensor on the induced draft motor senses that it has reached the required speed the burner sequence begins This function is performed by the integrated gas control IGC The evaporator fan motor is energized 45 seconds after flame is established When the thermostat is satisfied and W is deenergized the burners stop firing and the evaporator fan motor shuts off after a 45 second time off delay ALED light emitting diode indicator is provided on the control board to monitor operation The control board is lo cated by removing the burner access panel During normal operation the LED is continuously on
110. with water Connect a drain tube us ing a minimum of in PVC or Y4 in copper pipe all field supplied at the outlet end of the 2 in trap Do not undersize the tube Pitch the drain tube downward at a slope of at least one in for every 10 ft of horizontal run Be sure to check the drain tube for leaks 1 MIN 2 MIN Fig 14 Condensate Trap Step 7 Install Flue Hood The flue hood as sembly is shipped screwed to the control box in the burner compartment Remove the burner access panel to locate the assembly 4 CAUTION The venting system is designed to ensure proper vent ing The flue hood assembly must be installed as indi cated in this section of the unit installation instructions Install the flue hood as follows 1 This installation must conform with local building codes and with the National Fuel Gas Code NFGC American National Standards Institute ANSI Z223 1 in Canada CAN CGA B149 1 and B149 2 or NFPA National Fire Protection Association latest revision Refer to Provin cial and local plumbing or wastewater codes and other applicable local codes 13 2 Remove from shipping location Place vent cap assembly over flue panel Orient screw holes in vent cap with holes in the flue panel 3 Secure flue hood to flue panel by inserting a single screw on the right side the left side and the top of the hood Step 8 Install Gas Piping The gas supply pipe enters the un
111. y seated Motor programmed with a delay 48SX048 060 With thermostat in OFF the voltage 208 230 v l on G Y1 Y Y2 W with respect to IFM runs when it common should be 1 2 of actual should be off low voltage supply Water dripping into motor Connectors not firmly seated IFM Evaporator Indoor Fan Motor Integrated control motor units 48SX048 060 208 230 v IFM operation is intermittent SYMPTOM Burners will not ignite Heating CAUSE Water in gas line No power to furnace REMEDY Properly tighten blower wheel to shaft Determine cause and correct Connectors should snap easily do not force Allow a few minutes for motor to shut off If measured voltage is more than 1 2 the thermostat is incompatible with motor If voltage is less than Y the motor has failed Verify proper drip loops in connector wires Genily pull wires individually to be sure they are crimped into the housing REMEDY Drain Install drip leg Check power supply fuses wiring or circuit breaker No 24 v power supply to control circuit Miswired or loose connections Burned out heat anticipator in thermostat Check transformer NOTE Some transformers have internal overcurrent protection that requires a cool down period to reset Check all wiring and wirenut connections Replace thermostat Broken thermostat wire Misaligned spark electrodes No gas at main burners Inadequate heating D

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