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Carrier 48HC User's Manual

1. 575V ONLY FIOP PL19 DUET ACCESSORI POWER MID TIER YAC CONTROL 208 230V 4607 5750 LABEL RETURN 20 ORED SS 50 502044 ie 208 230 4607 ONLY SMOKE RJ 45 4 FROM POWER SCHEMATIC N 2 A SENSO TRAN ont SUPPLY El BLK SMOKE MEAS MO RED gt W RED SENSOR 6 3 2 AMPS GRN YEL ORN y BRN TROUBLE DP
2. FLOP MID TIER YAC W DEHUMIDIFICATION CONTROL 208 230V 460V 575V SEE POWER ACCESSORY POER L L H BLK 208 230 460v RETURN 50HE502358 A SMOKE RJ 45 FROM POWER SCHEMATIC SENSOR TRANI 3 BRN REHEAT BD ak 575 ONLY 45 RED 5 049 1 SENSOR 3 2 AMPS GRN YEL ORN 6 BRN oe TH ELS Dp BRN RED ALARM
3. FIOP MID TIER YAC W DEHUMIDIFICATION CONTROL 208 230V 460V 575V SEE POWER ACCESSORY Br 2087230 460 ONLY M 50 502358 vio SENSOR GO Fono Mz KA LL BRN 3 REHEAT BD 575V ONLY SUPPLY 27 Opu n SMOKE RJ 45 NO ED 2506 ORN SENSOR 6 RA ones Lu mou PNK BRN tt BLE een gt BOARD 27 9849 8 BLU o 8L0 To SMOKE CONTROL bi MODULE vlo F IOP ACCESSORY Raf FC gt BRN 575V s FTOP ACCY TWO STAGE 1016 2 9 3 7 HP wt REDO OT IM ONLY pee SAFETY PMR Logic
4. accessory Pomen ce Laas MID TIER YAC W DEHUMIDIFICATION CONTROL 208 230V 460V 575V col ae 2080530 omy RETURN Gy pep Sse 50HE502358 A il SMOKE RJ 45 FROM POWER SCHEMATIC il 66 SENSOR TE 4 IGC ti ONLY eer s sin men m RUN 7 41 3 2 AMPS GRN YEL a ORN 6 BRN peg Gm 5 OUR ALARM 9 BLU BLU NO d RN BRN 24V TRAN BLU supe do NH BRN 20 TRAN is x GRA O IFC p BRN STAGE g T orate 2777 06 T YEL RED GRA arr i FOR FIELD USE BRN 9M o 2 SEN EARS 7 CE 55 GROUNDED CONTROL as THRU STANDOFF E 8 0 CCHR2 4 pp ae LITER STATUS p GRA 9 cam PER ae site ee ae L Accessory ORO 7 77 POWER SCHEMATIC w vio
5. C08635 Fig 46 Indoor Outdoor Air Quality Sensor 33ZCSENCO2 Typical Wiring Diagram To accurately monitor the quality of the air in the conditioned air space locate the sensor near a return air grille if present so it senses the concentration of CO2 leaving the space The sensor should be mounted in a location to avoid direct breath contact Do not mount the IAQ sensor in drafty areas such as near supply ducts open windows fans or over heat sources Allow at least 3 ft 0 9 m between the sensor and any corner Avoid mounting the sensor where it is influenced by the supply air the sensor gives inaccurate readings if the supply air is blown directly onto the sensor or if the supply air does not have a chance to mix with the room air before it is drawn into the return airstream Wiring the Indoor Air Quality Sensor For each sensor use two 2 conductor 18 AWG American Wire Gage twisted pair cables unshielded to connect the separate isolated 24 vac power source to the sensor and to connect the sensor to the control board terminals To connect the sensor to the control identify the positive 4 to 20 mA and ground SIG COM terminals on the sensor See Fig 46 Connect the 4 20 mA terminal to terminal TB3 9 and connect the SIG COM terminal to terminal TB3 11 See Fig 47 IAQ Sensor TB3 PL TB3 lt J5 3 24 VAC 11156 Fig 47 In
6. 19 14 14891 6 1 NOTES 6 1 4 157 11581 1 DIMENSIONS ARE IN INCHES DIMENSIONS IN 1 ARE IN MILLIMETERS 2 45 CENTER OF GRAVITY 3 DIRECTION OF AIR FLOW OUTDOOR AIR 68 68 1 8 1727 OPTIONAL 1130 14 1 8 1357 SES A B C 1 118 8 1 8 11811 12061 11 12 18 1279 13291 13191 50 1 2 112841 2 DIA 51 4 HOLES 24 1 8 16301 l 1NDOOR 19 CONTROL FILTER BLOWER 14831 Box AND ACCESS ACCESS INDOOR PANEL PANEL COIL 48 1 4 PANEL CEPS ME 112241 outSIDE GAS ACCESS 7 POWER p EXHAUST FLOW POWER EXHAUST OPTIONAL DOOR LIFTING HANDLE VERTICAL RETURN AIR VERTICAL SUPPLY AIR 151 3 4 140081 HORIZONTAL SUPPLY 5 5 8 5 1 4 11441 135 29 3 4 11561 HORIZONTAL DISCHARGE W O ECON WHEN ORDERED CONNECTION SIZES 1 3 8 DIA 35 FIELD POWER SUPPLY KNOCKOUT 3 DIA 76 FIELD POWER SUPPLY KNOCKOUT 3 5 8 DIA 1921 FIELD POWER SUPPLY KNOCKOUT 7 8 DIA 22 FIELD CONTROL WIRING HOLE 3 4 14 NPT CONDENSATE DRAIN 3 4 14 NPT GAS CONNECTION NOT SHOWN gt FLUE HOOD INTAKE HOOD FRONT s 6 1 2 11651 3 1 8 83 1981 1 1 4 DIA 32 KNOCKOUT CONDENSER CONDENSER 51 3 8 COIL COIL 1456 __
7. 34 Supply Fan Status Switch 34 Remote Occupied Switch 34 Power Exhaust 34 CCN Communication Bus 35 Open Control System 36 Supply Air Temperature SAT Sensor 39 Outdoor Air Temperature OAT Sensor 39 1 2 39 48HC Field Connections 39 Space Temperature SPT Sensors 40 Indoor Air Quality Sensor 40 Outdoor Air Quality Sensor 41 Space Relative Humidity Sensor or Humidistat 41 Smoke Detector Fire Shutdown FSD 42 Connecting Discrete 42 Communication Wiring Protocols 43 General cde mice Pe de ges 43 Local ACCESS cere pce bb de ts 44 Open Troubleshooting 44 Outdoor Air Enthalpy Control 45 Differential Enthalpy Control 45 Smoke Detectors 46 Return Air Sensor Tube Installation 46 Smoke Detector Test Magnet 47 Additional Application 47 Step 13 Adjust Factory Installed Options 50 Step 14 Install Accessories 50 SAFETY CONSIDERATIONS Improper installation adjustment alteration service maintenance or use can cause explosion fire
8. 0 0 1 4 0 0 5 16 16 2 ALL FLANGES 1 1 4 31 GL 15461 j 27 3114 gt 5 8 3 4 111461 P INSULATED PANS MIN 18 GA STEEL WITH 1 2 INCH THK NEOPRENE INSULATION DETAIL A SCALE 1 2 SCALE 1 2 OPENING FOR ALT GAS SERVICE INSULATED PAN MIN 18 GA STEEL WITH 1 2 INCH THK NEOPRENE INSULATION C10956 Fig 8 Roof Curb Details 28 Size Unit 13 48HC MAXIMUM ALLOWABLE DIFFERENCE IN MM C10628 Fig 9 Unit Leveling Tolerances Step 5 Field Fabricate Ductwork Cabinet return air static pressure a negative condition shall not exceed 0 5 in wg 87 Pa with economizer or without economizer For vertical ducted applications secure all ducts to roof curb and building structure Do not connect ductwork to unit Fabricate supply ductwork so that the cross sectional dimensions are equal to or greater than the unit supply duct opening dimensions for the first 18 in 458 mm of duct length from the unit basepan Insulate and weatherproof all external ductwork joints and roof openings with counter flashing and mastic in accordance with applicable codes Ducts passing through unconditioned spaces must 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 applicable fire codes 54 SEE DETAIL A A m
9. O 5 2 PNK M n ii rin x mt D C MN da 41 lt n Dos Ko ale mae M I es hO BR BOARD 1 me uu ve es m3 ACCESSORY E HPS2 x Oey MOOOs 95 vio REHEA Le ee Gol Lus 9 qub CONTROL m A DIG a qne BRN E RDV2 VIO o Av Jo 8RN E g3 un CENTRAL ed sn us BRN TERMINAL BOARD Jee BI 155 57 74 als 11139 Fig 34 Typical Humidi MiZer Adaptive Dehumidification System Humidistat Wiring EDGE Pro THERMIDISTAT Unit CTB THERMOSTAT e Rh 0 i 1 4 O Y2 1 l wo o DE UR UE ne I I O W2 B ssp Sin aaa LaL Y1 54 EM 125 Lan nb a Y2 vi OAT O O R RRS O SRTN O Humidi MiZer FIOP HUM O 01 4 E THERMOSTAT 1 LTO REHEAT V O Pn oo CONTROL A Connection not required 09298 Fig 35 Typic
10. f RED 8LU o 8LU COT 6882 RS 7 BLU o BLU T oe SHOKE CONTROL BRN 24V TRAN FIOP ACCESSORY GRA ro BRN a 15 vio FAN Tox euo TWO STAGE 1FM OL 2 9 3 7 HP Fropiaccy 515V RED ONL v r ONLY CONT SAFETY LOGIC abs 9 en atu d pod H GRN RED o Em RN ET BRN FOR FIELD USE BRN 2 5 tB m y som UNIT FLAME SENSOR DMP2 SHUTDOWN BRN 1 BRN FIELD CONTROL 7 GROUNDED WIRING i S THRU STANDOFF S w BRA 0 Bi t m GRA HRI ACCESSORY MORN FILTER pas i TERM L RTU MP BOARD status 71 U ACCESSORY EXCEPT a BRN p 2 NZ Om ORN BRN OFC 1 u BRN S TERM BRN BOARD PER orc LOW AMBIENT f CENTRAL TERMINAL BOARD Area rere 50HE500891 t DISCRETE 0 20mA ANALOG JA J5 J6 290008099999 999008 99999909 3 8 E d 2255222 CO FIOP ACCY 1 BLK SLUT BRN CO Dyno mE S ECONOMIZER _ FIOP ACCESSORY ACCY RED7O 3 lt 2 CO c P amp qw alu IX LES F Up i 9 BLU BLK RED
11. S we wi aa 9 ve Note Typical multi function marking Follow manufacturer s configuration instructions to select Y2 Field Wiring UNIT DAMAGE HAZARD Failure to follow this caution may cause a short circuit Carefully check the connection of control coductor for indoor fan control at terminal G Connecting the indoor fan lead to terminal C will cause a short circuit condition which can cause component damage inside the unit or at thermostat C10731 Fig 30 Typical Low Voltage Control Connections NOTE If utilizing the through the base connections route the low voltage wire through the wire ties to the central terminal board Rubber Grommet Corner Post Wire Ties Thru the Base Connection C10734 Fig 31 Field Control Wiring Raceway Heat Anticipator Settings Set heat anticipator settings at 0 14 amp for the first stage and 0 14 amp for second stage heating Transformer Connection for 208 v Power Supply All units except 208 230 v units are factory wired for the voltage shown on the nameplate If the 208 230 v unit is to be connected to 208 v power supply the control transformer must be rewired by moving the black wire with the in female spade connector from the 230 v connection and moving it to the 208 v 1 4 in male
12. RED 29 eu we aU FOR FIELD USE BRN ORN o 1 A TEL O FLAME SENSOR 777 7 29 SHUTDOWN T FIELD a ae B m us Is ss s THRU STANDOFF 4 rs lt zz V i gt ORY ET 12 ONLY lary 0 BRN ly OD TE GO BLU BLK Lo Slt ACCESSORY 4 FILTER STATUS one 3 lt lt 3 h DA e p Qu NE eue BLK TAN Sir ee m our STATUS Y E je 1 5 ACCESSORY lt E DEM LG Maa POWER SCHEMATIC rem 1 IRAN vio emm 1 2 i SH 1 G rp 1711 XD jo la BLK Ko pe nis z Ord 1 9 gt TE kami m OWT pun 1 TERM L ORN XD s gt Hora4 BOARD lec P a G de 1 er 5747 1 Lor vio HUMIDISTAT crar KD 2 1 2 T ACCESSORY vio Ke 9 RED 3 Sce H vio aa 10 XS pio REHEATI Ets EYE HP TR ig e i RDV1 ORN o o BRN Rove VIO o v 10 8RN CENTRAL BLK BRN TERMINAL BOARD LDV2 BRN BLK Aror X e 50HE500891 E DISCRETE 0 20mA ANALOG 24 J5 J6 990099000890 900098 990099089 55 f 3 z 2288
13. 19 CONTROL FILTER INDOOR 483 Box AND BLOWER lt ACCESS INDOOR ACCESS CONDENSER CONDENSER PANEL COIL PANEL COIL 48 1 4 ACCESS 49 318 1224 PANEL i 1253 OUTSIDE ISI GAS ACCESS POWER EXHAUST FLOW POWER EXHAUST 15 1 8 10 1 4 m FLUE HOOD 2 5 8 OPTIONAL 1384 12591 AIR INTAKE 811 HAT DOOR LIFTING VERTICAL VERTICAL HANDLE RETURN AIR SUPPLY AIR WIDTH 50 1 2 112831 FRONT DE 121 1 8 132491 15 1 8 14021 4 HORIZONTAL SUPPLY HORIZONTAL RETURN WITHOUT ECONOMIZER 5 5 8 5 1 4 23 3 8 144 1351 15931 I 29 3 4 Ss ST MB are 19511 50 54 112891 HORIZONTAL DISCHARGE W O ECON WHEN ORDERED CONNECTION SIZES 1 3 8 DIA 35 FIELD POWER SUPPLY KNOCKOUT 3 DIA 76 FIELD POWER SUPPLY KNOCKOUT 3 5 8 DIA 92 FIELD POWER SUPPLY KNOCKOUT 7 8 DIA 22 FIELD CONTROL WIRING HOLE 3 4 14 NPT CONDENSATE DRAIN m o o om 3 4 14 NPT GAS CONNECTION NOT SHOWN BACK 41 3 8 10511 4 3 4 1221 ELECTRICAL DISCONNECT LOCATION 45 3 8 1151 9 3 8 239 HORIZONTAL RETURN vo WITH ECONOMIZER 1564 mi LEFT 4761 HORIZONTAL DISCHARGE W ECON WHEN ORDERED C10896 Fig 1 Unit Dimensi
14. COMM 1 E purus T SPACE ECONOMIZER a gt gt SENSOR DOR FIOP 1234 6 G ACCESSORY Accu 6 22 oR PM YEL PNK aS Sl Ou Lao zz i 2 8 25 8 0 vIO EG Rnet lt 6 1 0 1 ne gt gt gt RESISTOR MU 12 BLU ECONO 500 Q lt lt lt 1 10 1 RS UY sji n KECK RS 2 59 I Gy wo lt BLU J vio Bono alan gd QD accu a K NET Q BLK 1 Eon l BRN SHLD 2 s Mren RP lt S R 81k L E wo zz i 466 D 55 YEL 5 2 i lt gp lt ORN i 33CSENTHSW 955 crops 91 HUM TA lt 24 r F OP ACCESSORY VIO E Sr POWER EXHAUST lege me IGND Cow GRATE DAMPER lt 0 G in exi ENTHALPY DE ny fa fee 4 SM LCEIOP ACCESSORY PLO R PLG Fig 58 RTU Open System Control Wiring Diagram 37 C11142 48HC 575V ONLY
15. Fig 19 Gas Piping Guide 17 48HC Factory Option Thru Base Connections Electrical Connections Knockouts are located in the control box area Remove the appropriate size knockout for high voltage connection Use the field supplied connector depending on wiring or conduit being utilized Remove the 7 g in 22mm knockout and appropriate connector for low voltage wiring If non unit powered convenience outlet is being utilized remove the 7 g in 22mm knockout and utilize appropriate connector for 115 volt line See Step 12 Making Electrical Connections for details Gas Connections Remove the knockout in the base pan and route 3 4 in gas line up through the opening Install an elbow and route gas line through opening in panel after first removing plastic bushing Install a gas shut off followed by a drip leg and ground joint union Route gas line into gas section through the grommet Part KAS56SL112 at the gas inlet and into the gas valve See Fig 17 and Table 2 If a regulator is installed it must be located 4 feet 1 22 meters from the flue outlet Some municipal codes require that the manual shutoff valve be located upstream of the sediment trap See Fig 18 for typical piping arrangements for gas piping that has been routed through the sidewall of the base pan When installing the gas supply line observe local codes pertaining to gas pipe installations Refer to the NFPA 54 ANSI Z223 1 NFGC latest edition
16. UNIT MODEL UNITSIZE max 5 0 in wg 13 0 in wg CAUTION EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in damage to equipment 101006 Fig 18 Gas Supply Line Piping When connecting the gas line to the unit gas valve the installer MUST use a backup wrench to prevent X damage to the valve 9 MINIMUM CLEARANCE FOR PANEL REMOVAL GAS FROM REGULATOR GAS Install a gas supply line that runs to the unit heating section Refer to NFPA 54 NFGC or equivalent code for gas pipe sizing data Do not use a pipe smaller than the Ag MINIMUM 7 size specified Size gas supply line to allow for a DRIP LEG maximum pressure drop of 0 5 in wg 124 Pa between f PER NFGC gas regulator source and unit gas valve connection when BASERAS ELD unit is operating at high fire flow rate FABRICATED SUPPORT LEGEND The gas supply line can approach the unit in two ways horizontally from outside the unit across the roof or Field supplied through unit basepan Observe clearance to gas line NOTE Followalll cal codes components per Fig 19 SPACING OF SUPPORTS X DIMENSION STEEL PIPE NOMINAL DIAMETER EN in ft 1 2 6 3 4 or 1 8 11 or larger 10 C11121
17. 2 5 8 RETURN WITHOUT ECONOMIZER HORIZONTAL 67 86 3 8 CURB 121941 WIDTH RIGHT 0 4 3 4 122 49 3 8 id Met 5 5 8 aay LOCATION 45 3 8 1152 3 1 4 1841 4 3 4 23 3 8 1251 240 1593 LEFT 31 1 2 9511 50 3 4 112891 HORIZONTAL RETURN WITH ECONOMIZER 61 5 8 115641 E BACK LEFT ty 182313 HORIZONTAL DISCHARGE W ECON WHEN ORDERED C10900 Fig 3 Unit Dimensional Drawing 28 Size Unit 48HC STD UNIT CORNER CORNER CORNER CORNER C G UNIT WEIGHT WEIGHT A WEIGHT B WEIGHT C WEIGHT D dal LBS KG LBS KG LBS KG LBS KG LBS KG X Y 1 48HC28 2292 1042 577 262 559 254 583 265 602 274 44 11181 17 1 2 1969 19 483 STANDARD UNIT WEIGHT IS WITH LOW GAS FOR OTHER OPTIONS AND ACCESSORIES REFER TO THE PRODUCT DATA CATALOG CORNER A Y CORNER D TOP EAT AND WITHOUT PACKAGING CORNER B CORNER C Fig 3 Unit Dimensional Drawing 28 Size Unit cont FRONT C10901 INSTALLATION Jobsite Survey Complete the following checks before installation 1 Consult local building codes and the NEC National Electrical Code ANSI NFPA 70 for special installa tion requirements 2 Determine unit location from project plans
18. BLU 4152 r Y BRN RED ie a ee 9 CST 3 ORN RESISTOR IL be 2 ECONO 500 0 lt or 1 15 i oc 10 710 gt AUX LK iti SENG COM SET Aut zy 1 K EE CIS SPACE TEMP OFFSET SENSORS EE Se HOS alk mor LTOS rep CCN COMM 4 com C Eat DE Sup 53 5 12 GJ 8LK Lerep 2 lt lt RED 0 E Z tomo lis i rit 12 aS YEL GRA DE Gg Dann mI a em om t p B3CSENTHSW 93 1 LEAST 25 L wg ERU D 10600 OW Gra DAMPER h K lt lt Sr ps orc 5 E PREMIERLINK OPTION L FIOP ACCESSORY PL R PL6 D DARED J8 C11140 Fig 38 PremierLink Wiring Schematic 27 48HC 575V ONLY
19. Carrier logo should be orientated correctly when the sensor is properly mounted Avoid corner locations Allow at least 4 ft between the sensor and any corner Airflow near corners tends to be reduced resulting in erratic sensor readings The sensor should be vertically mounted approximately 5 ft up from the floor beside the space temperature sensor For wiring distances up to 500 feet use a 3 conductor 18 or 20 AWG cable ACCN communication cable can be used although the shield is not required The shield must be removed from the sensor end of the cable if this cable is used See Fig 51 for wiring details TB3 7 183 43 3 a lo Vin Gnd Vo il E 5 11085 Fig 51 Space Relative Humidity Sensor Connection The power for the sensor is provided by the PremierLink control on terminal J5 4 33 to 35vdc To wire the sensor 1 At the sensor remove 4 inches of the jacket from the cable Strip 4 inch of insulation from each conduct or Route the cable through the wire clearance open ing in the center of the sensor See Fig 50 2 Connect a field supplied BLACK wire to the sensor screw terminal marked Vin 3 Connect a field supplied RED wire into the sensor screw terminal marked Io 4 Connect the field supplied RED wire from the sensor to TB3 13 5 Connect the field supplied BLACK wire from the sensor to TB3 7 Humidistat connections A hu
20. Remote Occupied Switch The PremierLink control permits a remote timeclock to override the control s on board occupancy schedule and place the unit into Occupied mode This function may also provide a Door Switch time delay function that will terminate cooling and heating functions after a 2 20 minute delay Connect one side of the NO contact set on the timeclock to CTB s THERMOSTAT R terminal Connect the other side of the timeclock contact to the unit s TB3 2 terminal LCTB Remote Occupied Thermostat l R Time Clock TB3 PL ER 2 C10288 Fig 54 PremierLink Wiring Remote Occupied Refer to Form 33CS 67SI for additional information on configuring the PremierLink control for Door Switch timer function Power Exhaust output Connect the accessory Power Exhaust contactor coils s per Fig 55 Power Exhaust TB3 PL C11158 Fig 55 PremierLink Power Exhaust Output Connection NOTE The Power Exhaust and Humidi MiZer options can not be used with PremierLink at the same time as both options require connection at TB3 15 AUX OUT 34 CCN Communication Bus The PremierLink controller connects to the bus in a daisy chain arrangement Negative pins on each component must be connected to respective negative pins and likewise positive pins on each component must be connected to respective positive pins The controlle
21. electrical shock or other conditions which may cause personal injury or property damage Consult a qualified installer service agency or your distributor or branch for information or assistance The qualified installer or agency must use factory authorized kits or accessories when modifying this product Refer to the individual instructions packaged with the kits or accessories when installing Follow all safety codes Wear safety glasses and work gloves Use quenching cloths for brazing operations and have a fire extinguisher available Read these instructions thoroughly and follow all warnings or cautions attached to the unit Consult local building codes and appropriate national electrical codes in USA 70 National Electrical Code NEC in Canada CSA C22 1 for special requirements It is important to recognize safety information This is the safety alert symbol 4 When you see this symbol on the unit and in instructions or manuals be alert to the potential for personal injury Understand the signal words DANGER WARNING CAUTION and NOTE These words are used with the safety alert symbol DANGER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies hazards which could result in personal injury or death CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage NOTE is used to highlight suggestion
22. in Canada CAN CSA B149 1 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 l 4 in in every 15 ft 7 mm in every 5 m to prevent traps Grade all horizontal runs downward to risers Use risers to connect to heating section and to meter 2 Protect all segments of piping system against physical and thermal damage Support all piping with appro priate straps hangers etc Use a minimum of one hanger every 6 ft 1 8 m For pipe sizes larger than 1 5 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 lique fied petroleum gases as specified by local and or nation al codes If using PTFE Teflon tape ensure the materi al is Double Density type and is labeled for use on gas lines Apply tape per manufacturer s instructions 4 Pressure test all gas piping in accordance with local and national plumbing and gas codes before connect ing piping 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 3450 Pa Pressure test the gas supply piping system at pressures equal to or less than 0 5 psig
23. terminal on the primary side of the transformer Refer to unit label diagram for additional information 23 48HC Humidi MiZer Control Connections Humidi MiZer Space RH Controller NOTE The Humidi MiZer is a factory installed option The Humidi MiZer dehumidification system requires a field supplied and installed space relative humidity control device This device may be a separate humidistat control contact closes on rise in space RH above control setpoint or a combination thermostat humidistat control device such as Carrier s EDGE Pro Thermidistat with isolated contact set for dehumidification control The humidistat is normally used in applications where a temperature control is already provided units with PremierLink control To connect the Carrier humidistat HL38MG029 1 Route the humidistat 2 conductor cable field sup plied through the hole provided in the unit corner post 2 Feed wires through the raceway built into the corner post see Fig 31 to the 24 v barrier located on the left side of the control box The raceway provides the UL required clearance between high voltage and low voltage wiring 3 Use wire nuts to connect humidistat cable to two PINK leads in the low voltage wiring as shown Fig 34 To connect the Thermidistat device 33CS2PPRH 01 1 Route the Thermidistat multi conductor thermostat cable field supplied through the hole provided in the unit corner post
24. 13 Adjust Factory Installed Options EconoMi er IV Occupancy Switch Refer to Fig 76 for general EconoMi er IV wiring External occupancy control is managed through a connection on the Central Terminal Board If external occupancy control is desired connect a time clock or remotely controlled switch closed for Occupied open for Unoccupied sequence at terminals marked OCCUPANCY on CTB Remove or cut jumper JMP 2 to complete the installation Step 14 Install Accessories Available accessories include Roof Curb Thru base connection kit must be installed before unit is set on curb LP conversion kit Manual outside air damper High Altitude Gas kits Low Ambient Controls Thermostat Sensors Unit Without Economizer or resto Damper 2 Position Damper C10645 IV Wiring Two Position motorized outside air damper EconoMi er2 without control for external signal and integrated barometric relief IV with control and integrated barometric relief Power Exhaust Differential dry bulb sensor EconoMi er IV Outdoor enthalpy sensor Differential enthalpy sensor CO sensor DDC interface PremierLink Louvered hail guard Phase monitor control Winter Start kit Refer to separate installation instructions for information on installing these accessories Pre Start and Start Up This completes the mechanical installation of the unit Refer to the unit s Service and Maintenance ma
25. 2 Feed wires through the raceway built into the corner post see Fig 31 to the 24 v barrier located on the left side of the control box The raceway provides the UL required clearance between high voltage and low voltage wiring 3 The Thermidistat has dry contacts at terminals D1 and D2 for dehumidification operation see Fig 35 The dry contacts must be wired between CTB terminal R and the PINK lead to the LTLO switch with field supplied wire nuts Refer to the installation instructions included with the Carrier Edge Thermidistat device Form 33CS 65SI or latest for more information 24 RELATIVE HUMIDITY C09295 Fig 32 Accessory Field Installed Humidistat 1 l F actual temp 59 outside temp LI C09296 Fig 33 EDGE Pro Thermidistat 575V ONLY
26. 2288452 5 FIOP ACCY lt 8LK 46 COL RED 8 071 BRN Qu Drin 1 1 ECONOMI ZER FIOP ACCESSORY ACCY no PNK O ORN 0 cm lt lt PNK DO VI0 O BRV gt J9 gt lt lt VIO 3 RESISTOR 622 a G ECONO 5000 D 4 MOTOR 10 0 amp 0 0 1 a SENCH COM SET E GL n x T K Spe SPACE TEMP OFFSET GH pK S pz 1 1 7 BLK lt s Go ub CCN COMM yi com n nm 5 o Li RED DRAN uu ES ne i 18 25 YEL TD rco 5 SN 0 k H lt lt Sow rA EX orn 33CSENTHSW 1 FIOP 1 em aK Eg Grp Mg J GRA DAMPER 1 ri ao C n copie oc epe es DET PREMIERLINK OPTION Bu F IOP ACCESSORY ple R V HS ore Do rep C11141 Fig 39 PremierLink Wiring Schematic with Humidi MiZer 28 Supply Air Temperature SAT Sensor On FIOP equipped 48HC unit the unit is supplied with a supply air temperature SAT sensor 33ZCSENSAT This sensor is a tubular probe type approx 6 inches 12 7 mm in length It is a nominal 10 k ohm thermistor The SAT is factory wired The SAT probe
27. 3450 Pa The unit heating section must be isolated from the gas piping system by closing the external main manual shutoff valve and slightly opening the ground joint union 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 specified by local codes and or regulations WARNING FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in personal injury death and or property damage Connect gas pipe to unit using a backup wrench to avoid damaging gas controls Never purge a gas line into a combustion chamber Never test for gas leaks with an open flame Use a commercially available soap solution made specifically for the detection of leaks to check all connections Use proper length of pipe to avoid stress on gas control manifold NOTE If orifice hole appears damaged or it is suspected to have been redrilled check orifice hole with a numbered drill bit of correct size Never redrill an orifice A burr free and squarely aligned orifice hole is essential for proper flame characteristics D BURNER ORIFICE Fig 20 Orifice Hole A93059 18 Step 11 Install External Condensate Trap and Line The unit has one 3 4 condensate drain connection on the end of the condensate pan see Fig 21 See Figs 1 2 and 3 item in the view labeled BACK
28. AMP GRN YEL ORK Dx gt gt BRN wir TROUBLE 3 4 PNK gt gt CONTROL NC 8 BRN 5 BOARD RED ALARM 27 68 BLU o 8LU wo SMOKE CONTROL BRN 24V TRAN FIOP ACCESSORY GRA BRN a a 15 m vio rr rl ep O FIOP ACCY 1 TWO STAGE BRN M OL_ 2 9 3 7 HP 8 a UR IFM ONLY PNK CONT SAFETY RED HP YEL RED GRA 1951 ym ORN peu GRA T GRN RED BRN BRN FOR FIELD USE ORN O 6 3 YEL o FLAME SENSOR 777 UNIT SHUTDOWN BRN BRN FIELD CONTROL 7 GROUNDED WIRING Be j 5 THRU STANDOFF N YEL ONLY larn 0 0 1 ee GRA ante OO ACCESSORY 0RN 0 fm FILTER STATUS TERM L STATUS D BOARD 1 ACCESSORY gt GAYS as 3 OFM EX Tom X 0 0 2 G gt OW 2 3 BLK i TERM L BOARD i p O gt pc PER ore LOW AMBIENT H AT n CENTRAL TERMINAL BOARD Arr u e 50 501687 SOT Se RELATIVE CCESSORY E RELATIVE SEN afl eee COMM Tur a OPTION 1 2 4 OR OR 8 BLU FIOP ACCY alll BLK 80 06 CO pP 2 BLUI 2 BRN zt PORT x J12 1 gt i ACCESSORY
29. Arr Pal ET u e 50 501687 7 56 7 GVERELAS RELATIVE ACCESSORY TRITT 8 5 J15 e ISIC Faa als COMM TE 5 OPTION Sa OR OR 8 8LU 3 FIOP ACCY 2 BLK 6 DH ren ACCESS BLUT Gore SJ L SEN J12 T 55 WHT 1 ACCESSORY M Grn ECONOMIZER gt gt SENSOR gt GRN FIOP 1234 ACCESSORY Acen 5 co 80 0 PNK O ORN PK a Oru L K t Sp V10 O BRN E vio I 8 22 8 0 5 5 lt vo otio Oo R sistor sull Sq ECONO 500 za 12 x MOTOR w WISE 15 I RN 1 J2 232559 wr K Spe 35 2 07 l o n BLK BLK oe g SENSO 5l pi NET BLK em eT em SHLD 2 m ae alu p I 5 L L z RED CO a 59 B MD s 21 ES YEL i lt cea GH T6 ra n 5n I bn ORN s 1 DU A s CFIOP ACCESSORY VIO ACCESSORY J 12 25 n i POWER EXHAUST x GND Cow Rhea DAMPER i ae i i VIO VOX 1XPERKO BRN ENTHALPY K 2000 _ FIOP ACCESSORY WE eR OU m NEEDS ALL LIE lis 11143 Fig 59 Open System Control Wirin
30. L CONTROL BOX 11181 Fig 23 Location of TB1 Field power wires are connected to the unit at line side pressure lugs on the terminal block see wiring diagram label for control box component arrangement or at factory installed option non fused disconnect switch Use copper conductors only NOTE Make field power connections directly to line connection pressure lugs only 19 48HC WARNING FIRE HAZARD Failure to follow this warning could result in intermittent operation or unsatisfactory performance Do not connect aluminum wire between disconnect switch and air conditioning unit Use only copper wire See Fig 24 ELECTRIC DISCONNECT No SWITCH COPPER WIRE ONLY Fig 24 Disconnect Switch and Unit A93033 Units without Factory Installed Disconnect When installing units provide a disconnect switch per NEC National Electrical Code of adequate size Disconnect sizing data is provided on the unit informative plate Locate on unit cabinet or within sight of the unit per national or local codes Do not cover unit informative plate if mounting the disconnect on the unit cabinet Units with Factory Installed Disconnect The factory installed option disconnect switch is located in the main control box The manual switch handle is accessible on the corner post adjacent to the control box access panel All Units All field wiring must comply with NEC and all local code requ
31. OPERATION HAZARD Failure to follow this warning could result in personal injury or death Units with convenience outlet circuits may use multiple disconnects Check convenience outlet for power status before opening unit for service Locate its disconnect switch if appropriate and open it Lock out and tag out this switch if necessary 20 Two types of convenience outlets are offered on 48HC models Non unit powered and unit powered Both types provide a 125 volt GFCI ground fault circuit interrupter duplex receptacle rated at 15 A behind a hinged access cover located on the corner panel of the unit See Fig 26 Control Box Access Panel Electric Disconnect Switch Convenience Outlet C10641 Fig 26 Convenience Outlet Location Installing Weatherproof Cover weatherproof while in use cover for the factory installed convenience outlets is now required by UL standards This cover cannot be factory mounted due to its depth it must be installed at unit installation For shipment the convenience outlet is covered with a blank cover plate The weatherproof cover kit is shipped in the unit s control box The kit includes the hinged cover a backing plate and gasket DISCONNECT ALL POWER TO UNIT AND CONVENIENCE OUTLET LOCK OUT AND TAG OUT ALL POWER Remove the blank cover plate at the convenience outlet discard the blank cover Loosen the two screws at the GFCI duplex outlet until approximately 1
32. Smoke Detector Test Magnet Locate the magnet it is shipped in the control box area Additional Application Data Refer to Catalog No HKRNKA 1XA for discussions on additional control features of these smoke detectors including multiple unit coordination NO C O or UNPWR C O DISC SIZE 71 393 74 410 419 234 243 247 184 184 198 440 449 459 245 249 254 w pwrd fr unit FUSE or DISC SIZE HACR BRKR 100 0 413 100 0 430 100 0 439 50 0 246 50 0 255 50 0 40 0 40 0 40 100 100 125 80 1 82 8 87 6 41 1 42 5 45 1 31 0 31 0 33 8 87 5 92 3 97 7 42 8 45 4 48 2 31 33 8 37 2 100 5 105 9 119 4 54 8 57 6 63 6 36 38 41 27 125 0 125 150 60 0 70 80 50 0 50 50 175 0 175 175 554 628 277 282 47 48HC Table 11 Unit Wire Fuse or HACR Breaker Sizing Data cont COMBUSTION POWER w PWRD NOM FAN MOTOR EXHAUST w pwrd fr unit V Ph Hz FUSE or DISC SIZE FUSE or DISC SIZE MCA HACR MCA HACR BRKR BRKR 73 1 90 0 77 398 84 9 100 0 208 230 3 60 75 8 80 415 87 6 100 0 HIGH 80 6 85 424 92 4 100 0 37 1 39 236 43 3 50 0 460 3 60 38 5 i 41 245 44 7 50 0 HIGH 41 1 E 44 249 47 8 60 0 575 3 60 208 230 3 60 460 3 60 575 3 60 UNIT a r f r m m f I 41 4 44 251 47 6 44 2 47 256 50 4 27 9 29 2 7 30 7 202 35 5 34 1 200
33. This sensor may be a T 55 Space Sensor see Fig 41 installed in the space or in the return duct or it may be sensor PNO 33ZCSENSAT installed in the return duct Connect this sensor to TB3 1 and TB3 3 per Fig 42 Configure the Unit for Thermostat Mode Connect to the CCN bus using a CCN service tool and navigate to PremierLink Configuration screen for Operating Mode Default setting is Sensor Mode value 1 Change the value to 0 to reconfigure the controller for Thermostat Mode When the PremierLink is configured for Thermostat Mode these functions are not available Fire Shutdown FSD Remote Occupied RMTOCC Compressor Safety CMPSAFE Supply Fan Status SFS and Filter Pressure Switch FILTER 31 48HC Economizer Controls Indoor Air Quality 2 Sensor The indoor air quality sensor accessory monitors space carbon dioxide levels This information is used to monitor IAQ levels Several types of sensors are available for wall mounting in the space or in return duct with and without LCD display and in combination with space temperature sensors Sensors use infrared technology to measure the levels of CO present in the space air The sensors are all factory set for a range of 0 to 2000 ppm and a linear mA output of 4 to 20 Refer to the instructions supplied with the CO sensor for electrical requirements and terminal locations See Fig 46 for typical sensor wiring schematic
34. building network or zoning system However it is still recommended that return air duct sensor be installed to allow stand alone operation for back up Refer to the configuration section for details on controller configurations associated with space sensors 33ZCTSSSPT space temperature sensor with override button T 55 33ZCT56SPT space temperature sensor with override button and setpoint adjustment T 56 33ZCTS9SPT space temperature sensor with LCD liquid crystal display screen override button and setpoint adjustment T 59 Use 20 gauge wire to connect the sensor to the controller The wire is suitable for distances of up to 500 ft 152 m Use three conductor shielded cable for the sensor and setpoint adjustment connections If the setpoint adjustment slidebar is not required then an unshielded 18 or 20 gauge two conductor twisted pair cable may be used Connect T 55 See Fig 41 for typical T 55 internal connections Connect the T 55 SEN terminals to RTU Open J20 1 and J20 2 See Fig 60 C08460 Fig 60 RTU Open T 55 Sensor Connections Connect T 56 See Fig 43 for T 56 internal connections Install a jumper between SEN and SET terminals as illustrated Connect T 56 terminals to RTU Open J20 1 J20 2 and J20 3 per Fig 61 4 Jumper lt SETY C08461 Fig 61 RTU Open T 56 Sensor Connections Connect T 59 The T 59 space sensor requires a separate isolated
35. is included in the FIOP accessory 2 package lt t oS N ovo ndul Ovi z mdu bz x endu 5 a v2 LOCAL ACCESS PORT RNET lt 12 VDG Rnet Q _LSB _MSB Rnett Sw1 SW2 The RTU Open controller is an integrated component of the Carrier rooftop unit Its internal application programming provides optimum performance and energy efficiency RTU Open enables the unit to run in 100 stand alone control mode Carrier s I Vu Open network or a Third Party Building Automation System BAS On board DIP switches allow you to select your protocol and baud rate of choice among the four most popular protocols in use today BACnet Modbus Johnson N2 and LonWorks See Fig 57 Refer to Table 9 RTU Open Controller Inputs and Outputs for locations of all connections to the RTU Open board gt 1 Oz 0 10VDC e gt 5 5 mi g 000055 5 5 82 4 20 l 1 5 m 3 3 3 O PBO lt LER 5320 GoSosis 244 3252085 5 lt 55555555 OS O 2 GND 0 10V only ET DO 6 H _ Humidistat 00 7 Spare 00 8 Power Ethaust J11 J14 Protocol Selector Remove Input_10 55 Accy BACne
36. is mounted in the fan deck see Fig 40 It can be removed or remounted per local codes Drill or punch a 1 2 in hole in the flange or duct Use two field supplied self drilling screws to secure the sensor probe in a_ horizontal orientation Insure that the sensor wires do not contact the hot surface of the heat exchanger SUPPLY AIR TEMPERATURE 2 SENSOR lt ROOF CURB SUPPLY AIR RETURN AIR C10733 Fig 40 Mounting Location for Supply Air Temperature SAT Sensor on 48HC Units NOTE Refer to Form 33CS 67SI for complete PremierLink configuration operating sequences and troubleshooting information Have a copy of this manual available at unit start up NOTE The sensor must be mounted in the discharge airstream downstream of the cooling coil and any heating devices Be sure the probe tip does not come in contact with any of the unit s heater surfaces Outdoor Air Temperature OAT Sensor The OAT is factory mounted in the EconoMi er2 or accessory It is a nominal 10k ohm thermistor attached to an eyelet mounting ring 2 The PremierLink control is used with EconoMi er2 option or accessory for outdoor air management The damper position is controlled directly by the PremierLink control EconoMi er2 has no internal logic device Outdoor air management functions can be enhanced with field installation of these accessory contr
37. not factory connected If local codes permit the transformer primary leads can be connected at the line side terminals on the unit mounted non fused disconnect switch this will provide service power to the unit when the unit disconnect switch is open See Fig 28 SCHEMATIC CONVENIENCE OUTLET FU4 5 REPLACE WITH 208 230V BUSSMAN FNO 7 460V BUSSMAN FNQ 3 5 RED 4 FU5 p YEL FIOP CONVENIENCE OUTLET 115V z GRA q pP BLK z 5 RED GRA RED Eu GRA d gt 7 GRN W a qp 42 Gy L GRN YEL gt E X9 090 9 e 2 e SECONDARY SECONDARY 20V 120V SW 0 SPLICE BLK RED 600V GRA i TRANS 82 40 QD WHT SECONDARY 120V BLK C10730 UNIT CONNECT PRIMARY TRANSFORMER VOLTAGE AS CONNECTIONS TERMINALS 208 240 11 RED YEL H1 H3 230 L2 BLU GRA H2 H4 H1 0 80 11 RED 46 4 Splice BLU YEL L2 GRA L1 RED H1 Fig 28 Powered Convenience Outlet Wiring 21 48HC NOTICE AVIS Convenience Outlet Utilization Maximum Intermittent Use 15 Amps Maximum Continuous Use 8 Amps Observe a 50 limit on the circuit Loading above 8 Amps Utilisation de la prise utilitaire Usage intermittent maximum 15 Amps Usage continu maxim
38. power supply of 24 VAC See Fig 62 for internal connections at the T 59 Connect the SEN terminal BLU to RTU Open J20 1 Connect the COM terminal BRN to J20 2 Connect the SET terminal STO or BLK to J20 3 BLK STO jesse EN J20 3 BRN SENSOR 4 J202 WIRING J20 1 O O OPB COM PWR OQ OO Lr el Bcc POWER 24 WIRING NOTE Must use a separate isolated transformer 10291 Fig 62 Space Temperature Sensor Typical Wiring 33ZCT59SPT Indoor Air Quality CO2 Sensor The indoor air quality sensor accessory monitors space carbon dioxide CO2 levels This information is used to monitor IAQ levels Several types of sensors are available for wall mounting in the space or in return duct with and without LCD display and in combination with space temperature sensors Sensors use infrared technology to measure the levels of CO present in the space air The sensors are all factory set for a range of 0 to 2000 ppm and a linear mA output of 4 to 20 Refer to the instructions supplied with the CO sensor for electrical requirements and terminal locations See Fig 46 for typical CO sensor wiring schematic To accurately monitor the quality of the air in the conditioned air space locate the sensor near a return air grille if present so it senses the concentration of CO2 leaving the space The sensor should be mounted in a location to avoid direct breath conta
39. supply pipe enters the unit adjacent to the burner access panel on the front side of the unit through the grommeted hole The gas connection to the unit is made to the 3 4 in FPT gas inlet port on the unit gas valve Table 2 lists typical 3 4 inch NPT National Pipe Thread field supplied pipe fittings required for Thru Base gas supply starting from the unit gas valve see Fig 17 16 Table 2 Typical 3 4 in NPT Field Supplied Piping Parts CPN CA15RA201 90 Deg Street Elbow CA01CA226 5 Inch Long Nipple CA85RA201 Ground Joint Union CA01CA218 3 Inch Long Nipple CA05RA201 90 Deg Elbow CA01CA250 12 Inch Long Nipple CA05RA201 90 Deg Elbow CA01CA218 3 Inch Long Nipple 01 222 4 Inch Long Nipple Sediment Trap CA01CA220 3 1 2 Inch Long Nipple 13 1 NIBCO Ball Valve CA01CA238 8 Inch Long Nipple mE MN CA05RA201 90 Deg Elbow Fig 17 Gas Supply Line Piping with Thru Base Pipe gas supply into 90 degree elbow item 15 see Table 2 through the hole in the unit basepan For typical 3 4 inch NPT field supplied fittings required for NON Thru Base gas supply starting from the unit gas valve omit items 14 and 15 from Table 2 and pipe gas supply into TEE See Fig 18 Table 3 Natural Gas Supply Line Pressure Ranges
40. unit is factory configured for immediate smoke detector shutdown operation additional wiring or modifications to unit terminal board may be necessary to complete the unit and smoke detector configuration to meet project requirements Return Air Sensor Tube Installation The return air sampling tube is shipped in the unit s supply fan section attached to the blower housing see Fig 73 Its operating location is in the return air section of the unit see Fig 74 unit without economizer or Fig 75 unit with economizer inserted into the return air sensor module housing which protrudes through the back of the control box Return Air Sampling Tube Shipping Location a 22 J C09102 Fig 73 Typical Supply Air Smoke Detector Sensor Location Return Air Detector Sampling Tube C09135 Fig 74 Return Air Sampling Tube Location in Unit without Economizer Return Air Detector Sampling Tube C09136 Fig 75 Return Air Sampling Tube Location in Unit with Economizer 46 To install the return air sensor sampling tube 1 2 Remove the tube from its shipping location Open the unit end to access the return air sensor loc ated on right hand partition Orient the tube s sampling holes into the return air flow direction For vertical application position th
41. 2 13 mm under screw heads exposed Press the gasket over the screw heads Slip the backing plate over the screw heads at the keyhole slots and align with the gasket tighten the two screws until snug do not over tighten Mount the weatherproof cover to the backing plate as shown in Fig 27 Remove two slot fillers in the bottom of the cover to permit service tool cords to exit the cover Check for full closing and latching COVER WHILE IN USE WEATHERPROOF RECEPTACLE NOT SHOWN zm NBN Syri BASE PLATE FOR GFCI RECEPTACLE 09022 Fig 27 Weatherproof Cover Installation Non unit powered type This type requires the field installation of a general purpose 125 volt 15 A circuit powered from a source elsewhere in the building Observe national and local codes when selecting wire size fuse or breaker requirements and disconnect switch size and location Route 125 v power supply conductors into the bottom of the utility box containing the duplex receptacle Unit powered type A unit mounted transformer is factory installed to stepdown the main power supply voltage to the unit to 115 v at the duplex receptacle This option also includes a manual switch with fuse located in a control box and mounted on a bracket behind the convenience outlet access is through the unit s control box access panel See Fig 26 The primary leads to the convenience outlet transformer are
42. 38 9 93 5 549 105 3 98 9 559 110 7 112 4 633 124 2 50 8 279 57 0 53 6 284 59 8 59 6 321 65 8 37 2 206 42 0 45 4 41 1 45 9 122 2 134 0 127 6 139 4 140 3 152 1 56 2 62 4 59 65 2 65 71 2 46 9 50 3 50 8 27 9 29 186 327 40 0 27 9 29 186 327 40 0 30 7 33 200 35 5 45 0 80 5 85 445 92 3 100 85 3 90 454 97 1 110 90 7 96 464 102 5 125 208 230 3 60 460 3 60 575 3 60 HIGH 208 230 3 60 460 3 60 575 3 60 HIGH 38 8 41 247 45 NOTE See page 49 for table legend and notes pire m T AB o o a m T M a x N N a x N B o 48 Legend and Notes for Table 11 LEGEND BRKR Circuit breaker Convenience outlet DISC Disconnect FLA Full load amps LRA Locked rotor amps US MCA Minimum circuit amps LISTED PE Power exhaust PWRD CO Powered convenient outlet UNPWR CO Unpowered convenient outlet NOTES 1 In compliance with NEC 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 Canadian units may be fuse or circuit breaker 2 Unbalanced 3 Phase Supply Voltage Never operate a motor where a phase imbalance in supply voltage is greater than 2 Use the following formula to de termine the perce
43. 48HC Single Package Rooftop Gas Heating Electric Cooling Unit with Puron R 410A Refrigerant Sizes 17 20 24 28 turn to the experts fH Installation Instructions NOTE Read the entire instruction manual before starting the installation TABLE OF CONTENTS SAFETY CONSIDERATIONS 2 INSTALLATION 9 Jobsite Survey 9 Step 1 Plan for Unit Location 9 Roof uu u i s eere eee 9 Step 2 Plan for Sequence of Unit Installation 10 Curb Mount Installation 10 Pad Mount Installation 10 Frame Mount Installation 10 Step 3 Inspect 10 Step 4 Provide Unit Support 10 Roof Curb Mount 10 Slab Mount Horizontal Units Only 10 Alternate Unit Support In Lieu of Curb or Slab Mount 10 Step 5 Field Fabricate Ductwork 14 Step 6 Rig and Place Unit 14 Positioning on Curb 15 Step 7 Horizontal Duct Connection 15 Step 8 Install Outside Air Hood Factory Option 15 Step 9 Install Flue Hood and Combustion Air Hood 16 Step 10 Install Gas Piping 16 Gas Supply Line 16 Factory Option Thru Base Connections 18 Step 11 Install Exter
44. 6 B0 2 3 4 110 2 110 01 0 0 3 3 4 16 21 REF 95 61 48 2 AT 2 PLCS 1269 51 1 3 11 5 8 1209 3 2 0 1 16 RETURN AIR T 611 1 REF OPENING 2 15 16 0 1 1 8 V docta 115 01 OPENING FOR 41 6 1563 51 THRU THE BASE ve CINSIDE 0 6 1 4 ELECTRICAL SERVICE 1161 5 6 8 5 8 IS 2041 81 _ OUTSIDE Ex ER RETURN 4 SUPPLY V ATR AIR 11 114 2 1 1 2 lt 489 0 717 5 1649 21 SEE DETAIL A SEE DETAIL ur A 6 0 0 1 2 2 91 16 21 S DETAIL SCALE 1 2 SCALE 1 2 TYP FRONT AND BACK TYP BOTH ENDS NOTES 1 ROOF CURB ACCESSORY IS SHIPPED UNASSEMBLED 2 DIMENSIONS IN 1 ARE IN MILLIMETERS 3 ROOF CURB GALVANIZED STEEL 4 ATTACH DUCTWORK TO CURB FLANGES ON DUCT REST ON CURB 5 SERVICE CLEARANCE 4 ft ON EACH SIDE gt DIRECTION OF AIR FLOW BACK 110 4 28 ROOF CURB RETURN END 5 91 gy Teres MAX CURB LEVELING TOLERANCES GASKET SUPPLIED WITH CURB 0 7 16 COUNTER FLASHING 4 Lu FIELD SUPPLIED ROOFING FELT FIELD SUPPLIED CANT STRIP FIELD SUPPLIED MM GG TYPICAL 4 SIDES RIGID INSULATION FIELD SUPPLIED OPENING FOR ALT GAS SERVICE ar ALL FLANGES 1 1 4 31 15461 27 3 1 4 16921 9723 74 1
45. 606 INSULATED PANS MINIMUM 18 GAUGE STEEL WITH 1 2 INCH NEOPRENE INSULATION C10954 Fig 6 Roof Curb Details 17 Size Unit 11 48HC 20 24 117 2 1356 01 CRRECURBOATAOO 2 0 610 0 CRRFCURBO48A00 1 NOTES 1 ROOF CURB ACCESSORY IS SHIPPED UNASSEMBLED 2 DIMENSIONS IN E J ARE IN MILLIMETERS 27 3 1 8 11 3 11 16 3 ROOF CURB GALVANIZED STEEL 1108 41 13445 71 INSIDE OUTSIDE 4 ATTACH DUCTWORK TO CURB FLANGES ON DUCT 5 REST ON CURB 5 SERVICE CLEARANCE 4 ft ON EACH SIDE SUPPLY AIR 317 5 OPENING ATO DIRECTION OF AIR FLOW lt 0 4 5 16 52 34 0 2 374 eee Z 8110 01 0 3 i 16 21 REF tastes 47 2 AT 2 PLCS 1269 51 110 4 i 39 11 5180 28 11209 31 ROOF 2 0 1716 PETN CURB 7 611 1 REF op Nl i RETURN END T ae OPENING FOR oan 28 0 1 1 8 1730 1 4 07 2 15 16 OPENING TO is 3i 41 6 1563 51 115 01 INSIDE SERVICE Y poor CURB 161 5 6 8 5 8 MAX CURB LEVELING TOLERANC
46. 9 BLU nh A lt 4 GRN gt BRN SMOKE CONTROL BLU o 8LU Doo MODULE BRN o FIOP ACCESSORY e BRN i i un 1FM OL FIOP ACCY TWO STAGE 2 9 3 7 ONLY roog oT MGV ONLY CONT GRA MP RED a ADU Eg PNK FOR FIELD USE BRN ORN O o M UNIT FLAME SENSOR SHUTDOWN BRN FIELD CONTROL 3 WIRING ORN BRN ACCESSORY COW FILTER STATUS GBA ae 1810 oes cepa See eis RTU MP STATUS Comp MEME ONLY LPS 1 Accessory Co 0 FROM POWER 1 1 VIO vio ORN 1 2 T dur P x D up ue So EXCEPT 3 OFM YEL woes JE AI Om 2 KET Lomo BLK 2 G gt BRN l2 BRN 0 OFR 2 L 3 Lw 2 ORN BRN OFC 1 ic lt BEN Pi 4 E EN D vul DGO BRN ku o eram axem DIEN vio lt o BIMIDISTAT i 52 LPS2 ley Or ACCESSORY EC WOODS RED ORN 222 Oe sh CONTRO 9 REHEAT to 0 Lak 10 VOC JOC BRN 9 2 Or BRN 0 PER RDV1 vio BRN oA sm 10 LOVI CENTRAL BLK BRN TERMINAL BOARD BLK eJ Ax e
47. A00 i NOTES 1 ROOF CURB ACCESSORY IS SHIPPED UNASSENBLED 2 BOLT HEADS TO BE ON INSIDE OF FLANGE CLEARANCE IS 111 0 0 7 16 TYP ALL CORNERS 3 DIMENSIONS IN J ARE IN MILLIMETERS 4 ROOF CURB GALVANIZED STEEL ATTACH DUCTWORK TO CURB FLANGES ON DUCT 2 3 1 8 REST ON CURB 1108 41 1 15 16 CINSTDE 6 SERVICE CLEARANCE 4 ft ON EACH SIDE QUIS TD 7 GAS SERVICE PLATE IS PART OF A SEPERATELY SHIPPED ACCESSORY PACKAGE 1 2 1 8 8 GAS SERVICE PLATE CAN BE USED WITH EITHER SUPPLY AIR 5 OPENING p 1311 51 ACCESSORY ROOFCURB lt a 0 4 5 16 ALT GAS DIRECTION OF AIR FLOW 110 2 E REF 8110 01 vane 0 3 314 110 41 po 16 21 REF 95 6 L 1269 5 ROOF CURB Tq 3 11 5 8 1209 31 2 0 1 16 EE RETURN END REF OPENING oue 281 5 9 n 1 1 ROOF CURB 0 2 15 16 4 5 01 d 10 14 MAX CURB LEVELING TOLERANCES 1563 5 0 6 1 4 INSIDE 161 5 6 8 5 8 m 2047 83 ch OPENING FOR OUTSIDE ELECTRICAL SERVICE GASKET SUPPLIED WITH CURB m di NAIL 0 7 16 111 4 lt COUNTER FLASHING SUPPLIED ROOFING FELT FIELD SUPPLIED CANT STRIP FIELD SUPPLIED a ROOFING MATERIAL FIELD SUPPLIED 2 3 RIGID INSULATION RETURN A EFIEEDESURRCTEDA XX GQ AIR 1 7 1 4 2 4 1 4 B MET TYPICAL 4 SIDES 1489 01 1717 5 649 2 gt SEE DETAIL SEE DETAIL
48. ES 2041 81 OUTSIDE SUPPLIED WITH CURB NAIL 0 1 16 111 Ml COUNTER FLASHING FIELD SUPPLIED ROOFING FELT FIELD SUPPLIED HH CANT STRIP FIELD SUPPLIED ROOFING MATERIAL FIELD SUPPLIED ll 1 L RIGID INSULATION NN SUPPLY HELD SUPPLIED AX QO AIR AIR 11 14 2 4 114 273 2 ENS PA TYPICAL 4 SIDES 1489 01 1717 5 1649 21 5 SEE DETAIL A SEE DETAIL m 2 0 0 5 16 0 0 1 4 1 41 16 21 ALL FLANGES 1 1 4 31 1 9 1 2 1 1546 Pe 2 3 1 4 16921 gt lt 2321 47 116061 DETAIL B INSULATED PANS MINIMUM SCALE SCALE 1 2 18 GAUGE STEEL WITH 1 2 TYP FRONT AND BACK TYP BOTH ENDS OPENING FOR ALT GAS SERVICE INCH NEOPRENE INSULATION INSULATED PANS MINIMUM 18 GAUGE STEEL WITH 1 2 INCH NEOPRENE INSULATION C10955 Fig 7 Roof Curb Details 20 and 24 Size Units 12 T ROOF CURB UNIT SIZE A ACCESSORI 28 17527 1356 01 CRRFCURBO49A00 2 0 610 0 CRRFCURBOSO
49. HORIZONTAL DISCHARGE for the location of the condensate drain connection CONDENSATE DRAIN CONNECTION 10729 Fig 21 Condensate Drain Pan Connection The piping for the condensate drain and external trap can be completed after the unit is in place Hand tighten fittings to the drain pan fitting Provide adequate support for the drain line Failure to do so can result in damage to the drain pan See Fig 22 2 51 MIN MINIMUM PITCH 1 25mm PER 10 3m OF LINE BASE RAIL OPEN VENI TO ROOF DRAIN SEE NOTE ROOF CURB DRAIN PLUG NOTE Trap should be deep enough to offset maximum unit static difference A 4 102 trap is recommended C08022 Fig 22 Condensate Drain Piping Details All units must have an external trap for condensate drainage Install a trap at least 4 in 102 mm deep and protect against freeze up If drain line is installed downstream from the external trap pitch the line away from the unit at 1 per 10 ft 25 mm in 3 of run Do not use a pipe size smaller than the unit connection 3 4 in Step 12 Make Electrical Connections WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death Do not use gas piping as an electrical ground Unit cabinet must have an uninterrupted unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should o
50. Identification and Seal Strip Application Areas 4 Secure side plates to panel using the screws provided 5 Apply seal strip to mating flange of the hood see Fig 14 6 Secure top flange using screws provided in kit 7 Install outdoor air screens by sliding them into the channel formed by the four angles installed in step 2 Make sure that the screens extend across the entire length of the hood 8 Install side filter supports using the screws provided 9 Install side drip angles using the screws provided 10 Run a continuous length of seal strip across the hood covering the engagement holes in the lower hood 11 Install top diverter using the screws provided 12 On units with barometric relief remove screws at bot tom of relief damper Do not discard damper door ACA C09090 Fig 15 Hood Assembly Completed Step 9 Install Flue Hood and Combustion Air Hood The flue hood is shipped screwed to the fan deck inside the burner compartment Remove the burner access panel and then remove the flue hood from its shipping location Using the screws provided install flue hood in the location shown in Fig 16 The combustion air hood is attached to the back of the burner access panel Remove the two screws securing the hood to the back of the burner access panel Using the two screws re attach the hood to the front of the burner access panel as shown in Fig 16 UU Combustion Ai
51. OFF Raw 9 OW p s pom ij NOTE DS Dip Switch BACnet MS TP SW3 example shown Baud Rate Selections ewone o9 959 x ON OF OF ON emo O ow Comm Set to Option Set to MSTP 38 4k Unused Port master baud OFF ON Protocol Selector DIP Switches 07166 Fig 67 RTU Open SW3 Switch Settings MSB 158 SW2 Fig 68 RTU Open Address Switches SW1 C10815 C10816 Fig 69 Network Wiring 43 48HC Local Access BACview Handheld The BACview is a keypad display interface used to connect to the RTU Open to access the control information read sensor values and test the RTU see Fig 70 This is an accessory interface that does not come with the RTU Open controller and can only be used at the unit Connect the BACview to Open J12 local access port There are 2 password protected levels in the display User and Admin The user password is defaulted to 0000 but can be changed The Admin password is 1111 and cannot be changed There is a 10 minute auto logout if a screen is idle See Form 48 5 01 Appendix A for navigation and screen content Virtual BACview Virtual BACview is a freeware computer program that functions as the BACview Handheld The USB Link interface USB L is required to connect a computer to the RTU Open board The link cable connects a USB port to the J12 local access port
52. RE IN MILLIMETERS I 2 45 CENTER OF GRAVITY 35 gt DIRECTION OF AIR FLOW OUTDOOR AIR ET 61 5 8 68 HOOD 115641 17271 OPTIONAL 1 14 118 360 Ne l 2061 6 1 2 3 1 4 3 1 8 7 1 8 12 118 279 1671 831 98 181 p 1 1 4 DIA 32 KNOCKOUT h gt s0172 TOP 112841 CONDENSER 24 1 8 2 DIA 51 16301 HOLES 4 COIL 19 FILTER INDOOR 14831 CONTROL ano BLOWER Box INDOOR ACCESS 1 ACCESS colL PANEL CONDENSER 112241 ACCESS au PANEL ppm ME H OUTSIDE m GAS access POWER p EXHAUST FLOW POWER EXHAUST 4 15 178 10 174 FLUE HOOD lt 2 58 86 3 8 13841 12591 AIR INTAKE 67 2194 DOOR LIFTING VERTICAL VERTICAL HOOD TYP NDLE RETURN AIR SUPPLY AIR RIGHT 5031 2 FRONT 112831 141 1 2 3595 4 3 4 122 RETURN ELECTRICAL WITHOUT DISCONNECT ECONOMIZER LOCATION HORIZONTAL A 45 3 8 SUPPLY Be 11151 C 3 1 4 9 3 8 Le 239 841 LEFT 11221 23 3 8 29 34 17561 37 1 2 19511 50 3 4 112891 HORIZONTAL DISCHARGE W O ECON WHEN ORDERED CONNECTION SIZES I A 1 3 8 DIA 35 FIELD POWER SUPPLY KNOCKOUT 3 DIA 76 FIELD POWER SUPPLY KNOCKOUT C 3 5 8 DIA 1921 FIELD POWER SUPPLY KNOCKOUT HORTZONTAL RE
53. SW Requires 33CSENTHSW or equivalent Requires 33CSENTSEN or equivalent 332 2 Room sensor adjustable Aspirator box is required for duct mounting of the sensor 33ZCASPCO2 Aspirator box used for duct mounted CO room sensor 33ZCT55CO2 Space temperature and room sensor with override 33ZCT56CO2 Space temperature and room sensor with override and setpoint 29 48HC Table 5 Space Sensor Mode TB3 TERMINAL FIELD CONNECTION INPUT SIGNAL 1 T65 SEN TS6 SEN T65 SEN TS6 SEN Discrete 24VAC LOOP PWR Analog 24VDC Discrete 24VAC T56 SET Analog 10k thermistor 10 IAQ SEN Analog 4 20 IAQ COM OAQ COM RH CO Analog 4 20mA FILTER Discrete 24VAC COM CCN RED Digital 5 DC LEGEND 55 56 CMPSAFE FILTER FSD IAQ OAQ RH SFS Space Temperature Sensor Space Temperature Sensor Carrier Comfort Network communication bus Compressor Safety Dirty Filter Switch Fire Shutdown Indoor Air Quality Outdoor Air Quality Relative Humidity Supply Fan Status Table 6 Thermostat Mode TB3 TERMINAL FIELD CONNECTION INPUT SIGNAL 1 EMEN 82 I ____ Y2 2 s _ EET ss RAT SEN Analog 10k thermistor Discrete 24VAC Discrete 24VAC Discrete 24VAC 088888 we CON RED Digital VDC OAQ SEN RH SEN Analog 4 20mA
54. TURN 5 5 8 D 7 8 DIA 221 FIELD CONTROL WIRING HOLE WITH ECONOMIZER 143 E 3 4 14 NPT CONDENSATE DRAIN 3 4 14 NPT GAS CONNECTION NOT SHOWN m 61 5 8 UNIT 6 H 1564 718 3 4 41 3 8 49 3 8 20 SIZE 1051 1253 LEFT 14161 24 s ze 4973 8 51 3 8 HORIZONTAL DISCHARGE W ECON WHEN ORDERED 10892 Fig 2 Unit Dimensional Drawing 20 and 24 Size Units 48HC STD UNIT CORNER CORNER CORNER CORNER UNIT WEIGHT WEIGHT A WEIGHT B WEIGHT C WEIGHT D 18 KG 185 KG LBS KG LBS KG LBS KG X y 1 48HC20 2102 956 474 215 390 177 593 269 582 265 47 1 2 1120711 1 4 18101 16 1 2 14191 48HC24 2247 1021 540 246 556 253 598 272 581 264 44 5 8 11331 71 5 8 1819 19 14831 STANDARD UNIT WEIGHT IS WITH LOW GAS HEAT AND WITHOUT PACKAGING FOR OTHER OPTIONS AND ACCESSORIES REFER TO THE PRODUCT DATA CATALOG CORNER CORNER FRONT Fig 2 Unit Dimensional Drawing 20 and 24 Size Units cont C10893 HORIZONTAL RETURN AIR W O ECONOMIZER 53 3 4 113651 HORIZONTAL SUPPLY AIR t 4 25 1 2 1 16491 61 5 8 115641
55. This program functions and operates identical to the handheld RTU Open Troubleshooting Communication LEDs The LEDs indicate if the controller is speaking to the devices on the network The LEDs should reflect communication traffic based on the baud rate set The higher the baud rate the more solid the LEDs will appear See Table 10 mss se ERA fF swi SW Z S pier 4444 Access Port runi N P 1 P 1 Protocol Selector RTU Open 8 912 P5 P5 Cable Local Access Cable C10812 Fig 70 BACview Handheld Connections 44 Table 10 LEDs The LEDs on the RTU Open Control Board see Fig 57 show the status of certain functions m Opens receiving data om the network segment The Run and Error LEDs indicate control module and network status If Run LED shows And Error LED shows Status is 2 flashes per second 2 flashes 2 flashes per second alternating with Run LED Five minute auto restart delay after system error 2 flashes per second 4 Control module has just been formatted Hashes per sec nd 4 flashes Two or more devices on this network have the P then pause same ARC156 network address 5 per second Exec halted after frequent system errors or P control programs halted 5 flashes per second Exec start up aborted Boot is running 5 flashes per second Firmware transfer in progr
56. al Rooftop Unit with Humidi MiZer Adaptive Dehumidification System with EDGE Pro Thermidistat Device 25 48HC PremierLink Factory Option HVAC SENSOR INPUTS SPACE TEMP SET POINT SUPPLY AIR TEMP OUTDOOR TEMP INDOOR AIR QUALITY OUTDOOR AIR QUALITY EBD comfort system PremierLink Part Number Bus Element Unit Designation DUAL MODE SENSOR STAT REMOTE OCCUPANCY 77 COMP SAFETY Y1 Z FIRE SHUTDOWN Y2 77 SUPPLY FAN STATUS W1 NOT USED W2 are di ENTHALPY STATUS ENTH xt NAVIGATOR 4 20MA INDOOR COMPR HEAT EXHAUST PORT PORT ECONOMIZER FAN MOTOR 1 amp 2 LOW HIGH RVS VALVE OUTPUTS C08199 Fig 36 PremierLink Controller The PremierLink controller see Fig 36 is compatible with Carrier Comfort Network CCN devices This control is designed to allow users the access and ability to change factory defined settings thus expanding the function of the standard unit control board CCN service access tools include System Pilot Touch Pilot and DETECTOR CONTROLLER FIOP ACCY CENTRAL TERMINAL BOARD Service Tool Standard tier display tools Navigator and Scrolling Marquee are not suitable for use with latest MONITOR FUSE TRANI 5 RELAY BLOCK PremierLink controller Version 2 x FIOP ACCY The PremierLink control is factor
57. arton that is secured to the rear of the blower assembly Access the carton location through rear panel see Fig 13 Hood Top Shipping Position C09134 Fig 12 Hood Top Shipping Position To remove the hood parts package 1 Remove the back blower access panel 2 Locate and cut the strap being careful to not damage any wiring 3 Carefully lift the hood package carton through the back blower access opening See Fig 14 for identification of the various parts of the hood assembly Hood Package C09133 Fig 13 Hood Package Shipping Location 15 48HC To assemble the outside air hood 1 Remove hood top panel from shipping position on unit end 2 Install four angles to the upper end panel using the screws provided 3 Apply seal strip to mating flanges on the side plates of the hood see Fig 14 Apply Seal Strips to the back of these surfaces Apply Seal Strip to the front of this flange Apply Seal Strip to the front of this flange Apply Seal Strips to the back of these flanges 7 SLL SS y Apply Seal Strip ss to the back of this flange Seal Strips Item Description Qty 1 Angles 4 2 Side Plates 2 3 Hood 1 4 Outdoor Air Screens 4 5 Side Filter Supports 2 6 Side Drip Angles 2 Pd Top Diverters 2 C09079 Fig 14 Hood Part
58. ay 24VAC 1A J1 5 Power Exhaust Relay State pexh DO Relay 24VAC 1A J11 3 Dehumidification Relay State dehum DO Relay 24VAC 1A J11 7 8 LEGEND Analog Input AO Analog Output DI Discrete Input DO Discrete Output These inputs if installed take the place of the default input on the specific channel according to schematic Parallel pins J5 1 J2 6 J5 3 J1 10 J5 5 J1 2 are used for field installation The RTU Open controller requires the use of a Carrier space sensor A standard thermostat cannot be used with the RTU Open system Supply Air Temperature SAT Sensor On FIOP equipped 48HC unit the unit is supplied with a supply air temperature SAT sensor 33ZCSENSAT This sensor is a tubular probe type approx 6 inches 12 7 mm in length It is a nominal 10 k ohm thermistor The SAT is factory wired The SAT probe is wire tied to the supply air opening on the horizontal opening end in its shipping position Remove the sensor for installation Re position the sensor in the flange of the supply air opening or in the supply air duct as required by local codes Drill or punch a 2 in hole in the flange or duct Use two field supplied self drilling screws to secure the sensor probe in a horizontal orientation See Fig 40 Outdoor Air Temperature OAT Sensor The OAT is factory mounted in the EconoMi er2 FIOP or accessory It is a nominal 10k ohm thermistor attached to an eye
59. ccur This ground may consist of electrical wire connected to unit ground lug in control compartment or conduit approved for electrical ground when installed in accordance with NEC National Electrical Code ANSI NFPA 70 latest edition in Canada Canadian Electrical Code CSA Canadian Standards Association C22 1 and local electrical codes NOTE Field supplied wiring shall conform with the limitations of minimum 63 F 33 C rise Field Power Supply If equipped with optional Powered Convenience Outlet The power source leads to the convenience outlet s transformer primary are not factory connected Installer must connect these leads according to required operation of the convenience outlet If always energized convenience outlet operation is desired connect the source leads to the line side of the unit mounted disconnect Check with local codes to ensure this method is acceptable in your area On a unit without a unit mounted disconnect connect the source leads to the line side with unit field power leads See Fig 23 BLK U v YEL BLU vov LOAD SIDE _ 4 77 LINE SIDE 1 95 I Ll 4 ot ope A oem ee SEE DETAILA L1 L2 O K DETAIL
60. ct Do not mount the IAQ sensor in drafty areas such as near supply ducts open windows fans or over heat sources Allow at least 3 ft 0 9 m between the sensor and any corner Avoid mounting the sensor where it is influenced by the supply air the sensor gives inaccurate readings if the supply air is blown directly onto the sensor or if the supply air does not have a chance to mix with the room air before it is drawn into the return airstream Wiring the Indoor Air Quality Sensor For each sensor use two 2 conductor 18 AWG American Wire Gage twisted pair cables unshielded to connect the separate 40 isolated 24 vac power source to the sensor and to connect the sensor to the control board terminals To connect the sensor to the control identify the positive 4 to 20 mA and ground SIG COM terminals on the sensor See Fig 46 Connect the 4 20 mA terminal to RTU Open terminal J4 2 and connect the SIG COM terminal to RTU Open terminal J4 3 See Fig 63 IAQ Sensor 1 FRUTA 44 2 IG COM gt 44 3 24 10738 Fig 63 Open Indoor CO Sensor 33ZCSENCO2 Connections Outdoor Air Quality Sensor 33ZCSENCO2 plus weatherproof enclosure The outdoor air CO sensor is designed to monitor carbon dioxide 2 levels in the outside ventilation air and interface with the ventilation damper in an HVAC system The OAQ sensor is packaged with an outdoor cover See Fig 48 The
61. door CO Sensor 337 2 Connections Refer to Form 33CS 67SI PremierLink Installation Start up and Configuration Instructions for detailed configuration information Outdoor Air Quality Sensor 33ZCSENCO2 plus weatherproof enclosure The outdoor air sensor is designed to monitor carbon dioxide CO2 levels in the outside ventilation air and interface with the ventilation damper in an HVAC system The OAQ sensor is packaged with an outdoor cover See Fig 48 The outdoor air CO sensor must be located in the economizer outside air hood lt 414 e 33 4 S 6 1 2 COVER REMOVED SIDE VIEW C07135 Fig 48 Outdoor Air Quality Sensor Cover Wiring the Outdoor Air Sensor A dedicated power supply is required for this sensor A two wire cable is required to wire the dedicated power supply for the sensor The two wires should be connected to the power supply and terminals 1 and 2 To connect the sensor to the control identify the positive 4 to 20 mA and ground SIG COM terminals on the OAQ sensor See Fig 46 Connect the 4 to 20 mA terminal to the TB3 13 terminal of the 48HC Connect the SIG COM terminal to the TB3 11 terminal of the 48HC See Fig 49 32 OAQ Sensor D e D 011157 Fig 49 Outdoor Sensor Connections SIG COM 24 VAC Space Relative Humidity Sensor or Humidistat Connections Space Re
62. ds RED connect to 24V and BLK connect to GND The outdoor enthalpy changeover setpoint is set at the enthalpy controller Differential Enthalpy Control Differential enthalpy control is provided by sensing and comparing the outside air and return air enthalpy conditions Install the outdoor air enthalpy control as described above Add and install a return air enthalpy sensor see Fig 72 45 48HC PL6 1 24 V PL6 4 COM CTB ECON P LINK to J4 2 or RTU Open to J2 6 Outside Air Enthalpy Switch 24 36 Return Air VDC In Enthalpy 4 20 Main Sensor Out C11161 Fig 72 Outside and Return Air Enthalpy Sensor Wiring To wire the return air enthalpy sensor perform the following 1 Use a 2 conductor 18 or 20 AWG twisted pair cable to connect the return air enthalpy sensor to the enthal py controller 2 Connect the field supplied RED wire to spade connector on the return air enthalpy sensor and the terminal on the enthalpy controller Connect the BLK wire to spade connector on the return air en thalpy sensor and the terminal on the enthalpy controller Smoke Detectors Smoke detectors are available as factory installed options on 48HC models Smoke detectors may be specified for Supply Air only or for Return Air without or with economizer or in combination of Supply Air and Return Air Return Air smoke detectors are arranged for vertical return configurations only The
63. e provided to J11 2 on the RTU Open control board This can be provided by the unit s transformer from various sources The R terminal on the unit s low voltage terminal board LVTB is a logical source Refer to Fig 57 and Fig 58 or 59 for wire terminations at J11 42 Communication Wiring Protocols General Protocols are the communication languages spoken by contro devices The main purpose of a protocol is to communicate information in the most efficient method possible Different protocols exist to provide different kinds of information for different applications In the BAS application many different protocols are used depending on manufacturer Protocols do not change the function of a controller just make the front end user different The RTU Open can be set to communicate on four different protocols BACnet Modbus N2 and LonWorks Switch 3 SW3 on the board is used to set protocol and baud rate Switches 1 and 2 SW1 and SW2 are used to set the board s network address See Fig 67 and 68 for protocol switch settings and address switches The 3rd party connection to the RTU Open is through plug J19 See Fig 69 for wiring NOTE Power must be cycled after changing the SW1 3 switch settings Refer to the RTU Open Controller Integration Guide Catalog No 11 808 428 01 for more detailed information on protocols 3rd party wiring and networking SW3 Protocol Selection N2 Slave Unused OFF OFF OFF OFF
64. e sampling holes on the bottom of the tube facing into the bottom return duct opening For horizontal applic ation position the sampling holes on the side of the tube facing the unit s end panel Insert the sampling tube into the return air sensor module until the tube snaps into position Replace end panel or outside air hood NOM V Ph Hz TYPE STD 208 230 3 60 MED HIGH S 460 3 60 M HIGH 575 3 60 M HIGH 208 230 3 60 M HIGH Table 11 Unit Wire Fuse or HACR Breaker Sizing Data COMBUSTION FAN MOTOR POWER EXHAUST MCA 68 3 71 0 75 8 34 9 36 3 38 9 26 2 26 2 29 75 7 80 5 85 9 36 6 39 2 42 26 2 29 32 4 88 7 94 1 107 6 48 6 51 4 57 4 35 5 38 9 39 4 117 4 122 8 135 5 54 0 56 8 62 8 40 4 43 8 44 3 a 35 45 50 50 30 35 40 o HIGH HIGH T HIGH T HIGH T HIGH TD 575 3 60 NOTE See page 49 for table legend and notes w a m a A to A m a D D D D D D D D D D 5 5 5 5 5 208 230 3 60 M HIGH S M S S S S ED ED ED ED ED ED ED ED ED ED ED m T E z 2 M x N a N N FUSE or HACR BRKR 90 0 90 0 100 0 45 0 45 0 50 0 30 0 30 0 100 100 100
65. eld must be connected to ground at only one single point If the communication bus cable exits from one building and enters another building the shields must be connected to the grounds at a lightning suppressor in each building one point only Connecting CCN Bus NOTE When connecting the communication bus cable a color code system for the entire network 15 recommended to simplify installation and checkout See Table 8 for the recommended color code Table 8 Color Code Recommendations CCN BUS WIRE CCN PLUG PIN SIGNAL TYPE COLOR NUMBER Be 3 Connect the CCN lead typically RED to the unit s TB3 12 terminal Connect the CCN ground lead typically WHT to the unit s TB3 14 terminal Connect the CCN lead typically BLK to the unit s TB3 16 terminal See Fig 56 CCN Bus TB3 PL 01 020 TB3 GND WHT ha _ lt 2 2 TB3 iey C10290 Fig 56 PremierLink CCN Bus Connections 35 48HC RTU Open Control System The RTU Open control is factory mounted in the 48HC unit s main control box to the right of the CTB See Fig 37 Factory wiring is completed through harnesses connected to the CTB Field connections for RTU Open sensors will be made at the Phoenix connectors on the RTU Open board The factory installed Open control includes the supply air temperature SAT sensor The outdoor air temperature OAT sensor
66. ess Boot is running 7 flashes per second 4 per second alternating with Ten second recovery period after brownout 14 flashes per second Failure Try the following solutions Turn RTU Open off then on Format RTU Open Download memory to RTU Open Replace RTU Open NOTE Refer to Catalog No 48 5 01 for complete configuration of RTU Open operating sequences and troubleshooting information Refer to RTU Open Controller Integration Guide Catalog No 11 808 428 01 for details on configuration and troubleshooting of connected networks Have a copy of these manuals available at unit 9 L or RTU Open to J2 6 Outdoor Air Enthalpy Control Factory Wiring Harness PNO 33CSENTHSW C11160 Fig 71 Enthalpy Switch 33CSENTHSW Connections RED PL6 1 24 V BLK PL6 4 COM The enthalpy control 33CSENTHSW is available as a field installed accessory to be used with EconoMi er2 damper system The outdoor air enthalpy sensor is part of the enthalpy control The separate field installed accessory return air enthalpy sensor 33CSENTSEN is required for differential enthalpy control See Fig 71 Locate the enthalpy control in the economizer next to the Actuator Motor Locate two GRA leads in the factory harness and connect the gray lead labeled ESL to the terminal labeled LOW See Fig 71 Connect the enthalpy control power input terminals to economizer actuator power lea
67. for locations and sizes of the horizontal duct connections Note that there are two different retum air duct connection locations one for unit without an economizer on back side of unit and a different one for unit equipped with an economizer on left end under the economizer hood The supply air duct connection is on the back side See Fig 11 for top view depicting typical horizontal duct arrangements 9 Horizontal Supply Air Return Air Duct Return Air Duct without with Economizer Economizer C10626 5 Return without Return with upply Economizer Economizer 157 8 402 493 8 1253 189 g 467 293 4 756 233 8 593 615 1564 Height In mm Width in mm Fig 11 Horizontal Duct Opening Dimensions Field supplied 4 inch flanges should be attached to horizontal duct openings see Fig 11 and all ductwork should be secured to the flanges Insulate and weatherproof all external ductwork joints and roof or building openings with counter flashing and mastic in accordance with applicable codes Step 8 Install Outside Air Hood Factory Option The outside air hood for factory option economizer and two position damper is shipped in knock down form and requires field assembly The panel for the hood top is shipped on the end of the unit see Fig 12 The remaining parts for the hood assembly including side panels filters and tracks are shipped in a c
68. g Diagram with Humidi MiZer 38 Table 9 Open Controller Inputs and Outputs POINT NAME TYPE OF DEDICATED INPUTS Space Temp Zone Temp zone_temp Al 10K Thermistor 420 1 2 Supply Air Temperature sa_temp Al 10K Thermistor J2 1 2 Outdoor Air Temperature oa temp Al 10K Thermistor J2 3 4 Space Temperature Offset Pot stpt adj offset Al 100K Potentiometer J20 3 Safety Chain Feedback safety_status DI 24 VAC J1 9 Compressor Safety Status comp_status DI 24 VAC J1 2 Fire Shutdown Status firedown_status DI 24 VAC J1 10 Enthalpy Status enthalpy_status DI 24 VAC J2 6 Humidistat Input Status humstat_status DI 24 VAC 45 7 CONFIGURABLE INPUTS Indoor Air CO2 iaq Al 4 20 ma Outdoor Air CO2 Al 4 20 44 2 or 44 5 Space Relative Humidity space_rh Al 4 20 ma Supply Fan Status sfan_status DI 24 VAC Filter Status filter_status DI 24 VAC 45 1 or J5 3 Door Contact Input door_contact_status DI 24 VAC J5 5 or J5 7 Occupancy Contact occ contact status DI 24 VAC OUTPUTS Economizer Output econ output AO 4 20 J2 5 Supply Fan Relay State sfan DO Relay 24VAC 1A J1 4 Compressor 1 Relay State comp 1 DO Relay 24VAC 1A J1 8 Compressor 2 Relay State comp 2 DO Relay 24VAC 1A J1 7 Heat Stage 1 Relay State heat 1 DO Relay 24VAC 1A J1 6 Heat Stage 2 Relay State heat 2 DO Rel
69. inimum clearance is not required around ductwork CAUTION PROPERTY DAMAGE HAZARD Failure to follow this caution may result in damage to roofing materials Membrane roofs can be cut by sharp sheet metal edges Be careful when placing any sheet metal parts on such roof Step 6 Rig and Place Unit Keep unit upright and do not drop Spreader bars are not required if top crating is left on unit Rollers may be used to move unit across a roof Level by using unit frame as a reference See Table 1 on page 9 and Fig 10 for additional information Lifting holes are provided in base rails as shown in Fig 10 Refer to rigging instructions on unit CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage All panels must be in place when rigging Unit is not designed for handling by fork truck when packaging is removed Before setting the unit onto the curb recheck gasketing on curb PLACE ALL SEAL STRIP IN PLACE BEFORE PLACING DETAIL A UNIT ON ROOF CURB DUCT END C09107 48HC 17 2339 1061 127 8 3249 58 7 1491 52 3 1328 MAX WEIGHT UNIT j 5 P m m n n 48HC 20 2549 1156 141 5 3595 71 5 1816 52 3 1328 48HC 24 2699 1224 141 5 3595 71 5 1816 60 3 1532 48HC 28 2748 1246 157 8 4007 80 3 2040 60 3 1532 NOTES 1 Dimensions in are inches 2 Hook rigging shackles through holes in base rail as shown i
70. irements Size wire based on MCA Minimum Circuit Amps on the unit informative plate See Fig 25 for power wiring connections to the unit power terminal block and equipment ground Maximum wire size is 2 0 AWG per pole Provide a ground fault and short circuit over current protection device fuse or breaker per NEC Article 440 or local codes Refer to unit informative data plate for MOCP Maximum Over current Protection device size Voltage to compressor terminals during operation must be within voltage range indicated on unit nameplate See Table 11 On 3 phase units voltages between phases must be balanced within 2 and the current within 10 Use the formula shown in the legend for Table 11 see Note 2 on page 49 to determine the percent of voltage imbalance CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components Such operation would invalidate any applicable Carrier warranty Units Without Disconnect Option TBI 99 I Disconnect I I per i 1 TT TT L1 L2 L3 208 230 3 60 460 3 60 575 3 60 Units With Disconnect Option Factory Wiring 99 9 Disconnect Switch L1 L2 L3 C101000 Fig 25 Power Wiring Connections Convenience Outlets WARNING ELECTRICAL
71. istor RAT SEN Analog 10k thermistor AQ COM OAQ COM RH COM Analog 4 20mA CON Gnd WAT Digtal 5 06 AUX OUT Power Exhaust Output Discrete 24VAC CON LK Digital 5 0 LEGEND CON G IAQ RAT RH W1 Y1 Y2 Carrier Comfort Network communication bus Thermostat Fan Indoor Air Quality 2 Outdoor Air Quality 2 Return Air Temperature Relative Humidity Thermostat Heat Stage 1 Thermostat Heat Stage 2 Thermostat Cool Stage 1 Thermostat Cool Stage 2 30 Space Sensors The PremierLink controller is factory shipped configured for Space Sensor Mode A Carrier T 55 or T 56 space sensor must be used T 55 space temperature sensor provides a signal of space temperature to the PremierLink control T 56 provides same space temperature signal plus it allows for adjustment of space temperature setpoints from the face of the sensor by the occupants CCN COM SENSOR WIRING C08201 Fig 41 55 Space Temperature Sensor Wiring Connect T 55 See Fig 41 for typical T 55 internal connections Connect the T 55 SEN terminals to TB3 terminals 1 and 3 see Fig 42 10023 Fig 42 PremierLink T 55 Sensor Connect T 56 See Fig 43 for T 56 internal connections In
72. l EXH BLK BEER ZEE T p MIN WHT 0 5 25 55 PL6 R OPEN FOR STD m UNIT R_PLE R PL6 R PL6 RED TAQ O BLK 2v 2 ECONOMISER Li PNK O PNK ged v 24 dii D DIN X o RED OAT TEM aol 5 GRA VIO lt ENTHALPY SENSOR T YEL BRN 50 SE x lt soll 2v Y AU 40 ORNS WS No FREE amp LACCESSORY M 00 3 i Di RAT ENTHALPY SENSORI 00 e BESTES 7 Km 5 D vio 1 BLK BLK 5 m RED BRN lt BRN BRN 4 Economizer nores RED 2 2 lt amp 5 RESISTER REMOVED ONLY WHEN 1 a ihe DIFFERENTIA ENTHALEY OR DR GRA ail lt GRA SEPERATE FIELD SUPPLIED 24 TRANSFORMER 15 USED FOR THE g s SENSOR POWER Sue PLY IT CANNOT HAVE THE SECONDARY OF THE 1 51 51 O GRA GROUN ORN ORN 3 FOR FIELD INSTALLED REMOTE MINIMUM POSITION POT 3 3 amp REMOVE BLACK WIRE JUMPER BETWEEN P AND AND SET 3 1 9 1 O GRA CONTROL MINIMUM POSITION POT TO THE MINIMUM POSITION lt 1 FIOP PNK 5 wp poc FTOP ACCESSORY ONLY DAMPER e POWER EXHAUST x 11 ny SS sya 2D 9 ea Economizer Fig 76 Step
73. lative Humidity Sensor connections The accessory space relative humidity sensor 33ZCSENSRH 01 is installed on an interior wall to measure the relative humidity of the air within the occupied space The use of a standard 2 X 4 inch electrical box to accommodate the wiring is recommended for installation The sensor can be mounted directly on the wall if acceptable by local codes CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in permanent damage to the sensor DO NOT clean or touch the sensing element with chemical solvents as they can permanently damage the sensor CAUTION UNIT PERFORMANCE HAZARD Failure to follow this caution will result in inaccurate sensor readings DO NOT mount the sensor in drafty areas such as near heating or air conditioning ducts open windows fans or over heat sources such as baseboard heaters radiators or wall mounted dimmers Sensors mounted in those areas will produce inaccurate readings If the sensor is installed directly on a wall service install the humidity sensor using 2 screws and 2 hollow wall anchors field supplied Do not over tighten screws See Fig 50 MOUNTING HOLES WIRING OPENING Xj C11084 Fig 50 Space Relative Humidity Sensor Installation The sensor must be mounted vertically on the wall The
74. let mounting ring EconoMi er2 The RTU Open control is used with EconoMi er2 option or accessory for outdoor air management The damper position is controlled directly by the RTU Open control EconoMi er2 has no internal logic device Outdoor air management functions can be enhanced with field installation of these accessory control devices Enthalpy control outdoor air or differential sensors Space CO sensor Outdoor air sensor Field Connections Hield connections for accessory sensors and input devices are made the RTU Open at plugs J1 J2 J4 J5 J11 and J20 All field control wiring that connects to the RTU Open must be routed through the raceway built into the corner post as shown in Fig 31 The raceway provides the UL required clearance between high and low voltage wiring Pass the control wires through the hole provided in the corner post then feed the wires thorough the raceway 39 48HC to the RTU Open Connect to the wires to the removable Phoenix connectors and then reconnect the connectors to the board Space Temperature SPT Sensors There are two types of SPT sensors available from Carrier resistive input non communicating T55 T56 and 59 and Rnet communicating SPS SPPL SPP and SPPF sensors Each type has a variety of options consisting of timed override button set point adjustment a LCD screen and communication tie in Space temperature can be also be written to from a
75. midistat can not be directly connected to the PremierLink controller Follow the instructions on pages 24 amp 25 to connect a humidistat or a thermostat as an electromechanical device 33 48HC Smoke Detector Fire Shutdown FSD This function is available only when PremierLink is configured for Space Sensor Mode The unit is factory wired for PremierLink FSD operation when PremierLink is factory installed On 48HC units equipped with factory installed Smoke Detector s the smoke detector controller implements the unit shutdown through its NC contact set connected to the units input The FSD function is initiated the smoke detector s Alarm NO contact set The PremierLink communicates the smoke detector s tripped status to the CCN building control See Figs 38 and 39 the PremierLink wiring schematics Filter Status Switch This function is available only when PremierLink is configured for Space Sensor Mode PremierLink control can monitor return filter status in two ways By monitoring field supplied installed filter pressure switch or via supply fan runtime hours Using switch input Install the dirty filter pressure switch according to switch manufacturer s instructions to measure pressure drop across the unit s return filters Connect one side of the switch s NO contact set to CTB s THERMOSTAT R terminal Connect the other side of the NO contact set to TB3 10 Setpoint for Dirty Fil
76. n detail A Holes in base rails are centered around the unit center of gravity Use wooden top to prevent rigging straps from damaging unit Fig 10 Rigging Details 14 Positioning on Curb Position unit on roof curb so that the following clearances are maintained 1 4 in 6 mm clearance between the roof curb and the base rail inside the right and left 1 2 in 12 mm clearance between the roof curb and the base rail inside the front and back This will result in the distance between the roof curb and the base rail inside on the condenser end of the unit being approximately equal to Details A and B in Figs 6 7 and 8 Do not attempt to slide unit on curb after unit is set Doing so will result in damage to the roof curb seal Although unit is weatherproof guard against water from higher level runoff and overhangs Flue vent discharge must have minimum horizontal clearance of 48 in 1220 mm from electric and gas meters gas regulators and gas relief equipment Minimum distance between unit and other electrically live parts is 48 inches 1220 mm Flue gas can deteriorate building materials Orient unit such that flue gas will not affect building materials Locate mechanical draft system flue assembly at least 48 in 1220 mm from an adjacent building or combustible material After unit is in position remove rigging skids and shipping materials Step 7 Horizontal Duct Connection Refer to Figs 1 2 and 3
77. n steps Curb mounted installation Install curb Install field fabricated ductwork inside curb Install thru base service connection fittings affects curb and unit Rig and place unit Remove top skid Install outside air hood Install smoke detector tube Install combustion air hood Install flue hood Install gas piping Install condensate line trap and piping Make electrical connections Install other accessories Pad mounted installation Prepare pad and unit supports Rig and place unit Remove duct covers and top skid Install smoke detector return air sensor tube Install field fabricated ductwork at unit duct openings Install outside air hood Install combustion air hood Install flue hood Install gas piping Install condensate line trap and piping Make electrical connections Install other accessories Frame mounted installation Frame mounted applications generally follow the sequence for a curb installation Adapt as required to suit specific installation plan Step 3 Inspect unit Inspect unit for transportation damage File any claim with transportation agency Confirm before installation of unit that voltage amperage and circuit protection requirements listed on unit data plate agree with power supply provided Locate the carton containing the outside air hood parts see Figs 5 and 12 Do not remove carton until unit has been rigged and located in final position Step 4 Provide U
78. nal Condensate Trap and Line 19 Step 12 Make Electrical Connections 19 Field Power 19 Units without Factory Installed Disconnect 20 Units with Factory Installed Disconnect 20 erre ce uero 20 Convenience Outlets 20 Factory Option Thru Base Connections 22 Units without Thru Base Connections 22 Field Control Wiring 22 Thermostat Ee nne ees 22 Unit without Thru Base Conversion Kit 22 Heat Anticipator Settings 23 Transformer Connection for 208 v Power 23 Humidi MiZer Control Connections 24 Humidi MiZer Space RH Controller 24 PremierLink Factory Option 26 Supply Air Temperature SAT Sensor 29 Outdoor Air Temperature OAT Sensor 29 2 29 Field Connections 29 Space Senso foe sis Fae EC PES US 31 Connect Thermostat 31 Configure the Unit for Thermostat Mode 31 Economizer Controls 32 Indoor Air Quality CO2 Sensor 32 Outdoor Air Quality Sensor 32 Space Relative Humidity Sensor or Humidistat Connections 33 Smoke Detector Fire Shutdown FSD 34 Filter Status Switch
79. nit Support Roof Curb Mount Accessory roof curb details and dimensions are shown in Figs 6 7 and 8 Assemble and install accessory roof curb in accordance with instructions shipped with the curb NOTE The gasketing of the unit to the roof curb is critical for a watertight seal Install gasket supplied with the roof curb as shown in Figs 6 7 and 8 Improperly applied gasket can also result in air leaks and poor unit performance Curb should be level This is necessary for unit drain to function properly Unit leveling tolerances are show in Fig 9 Refer to Accessory Roof Curb Installation Instructions for additional information as required Install insulation cant strips roofing felt and counter flashing as shown Ductwork must be attached to curb and not to the unit Thru the base power connection must be installed before the unit is set on the roof curb If field installed thru the roof curb gas connections are desired remove knockout in basepan located in the gas section see Fig 5 for location Gas connections and power connections to the unit must be field installed after the unit is installed on the roof curb If electric and control wiring is to be routed through the basepan remove knockouts in basepan located in control box area of access panel see Fig 1 2 or 3 for basepan knockout locations for location Attach the service connections to the basepan Hood Carton Location p rear access panel Con
80. ntage of voltage imbalance max voltage deviation from average voltage Voltage Imbalance 100 x average voltage Example Supply voltage is 230 3 60 A B C 224 v 231 AC 226 224 231 226 681 Average Voltage 3 3 227 Determine maximum deviation from average voltage 227 224 231 227 2 4v 227 226 1 Maximum deviation is 4 v Determine percent of voltage imbalance Noltage Imbalance 100 x 227 1 76 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 49 48HC ee ce POTENTIOMETER DEFAULTS SETTINGS POWER EXH WI M L PNK 1 MINIMUM POS FULLY CLOSED H DCV MAX MIDDLE VIO DCV SET MIDDLE We BLK RED 1 NI TR TRI ECONOMIZER c e ser 0 s MOTOR POSITION Wr zy 2V BRN BRN H 3 REMOTE POT 135 ELT rm at RED k p
81. nual for detailed Pre Start and Start up instructions 50 51 48HC Copyright 2011 Carrier Corp 7310 W Morris St Indianapolis IN 46231 Printed in U S A Edition Date 04 11 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 52 Catalog 48HC 11SI Replaces 48HC 08SI
82. ol devices Enthalpy control outdoor air or differential sensors Space CO sensor Outdoor air CO sensor Refer to Table 4 for accessory part numbers Field Connections Field connections for accessory sensor and input devices are made at the 16 pole terminal block TB3 see Fig 38 and Fig 39 located on the control box top shelf in front of the PremierLink control Some input devices also require a 24 vac signal source connect at CTB terminal R at THERMOSTAT connection strip for this signal source See connections figures on following pages for field connection locations and for continued connections at the PremierLink board inputs Table 5 provides a summary of field connections for units equipped with Space Sensor Table 6 provides a summary of field connections for units equipped with Space Thermostat Table 4 PremierLink Sensor Usage OUTDOOR AIR TEMPERATURE SENSOR APPLICATION Differential Dry Bulb Temperature with PremierLink PremierLink requires 4 20 mA Actuator Included CRTEMPSNO01A00 Single Enthalpy with PremierLink PremierLink requires 4 20mA Actuator Included Not Used Differential Enthalpy with PremierLink PremierLink requires 4 20 Actuator NOTES CO Sensors Optional Included Not Used RETURN AIR TEMPERATURE SENSOR OUTDOOR AIR ENTHALPY SENSOR RETURN AIR ENTHALPY SENSOR Required 33ZCT55SPT or equivalent Requires 33CSENTH
83. onal Drawing 17 Size Unit 3 48HC STD UNIT CORNER CORNER CORNER CORNER C G UNIT WEIGHT WEIGHT A WEIGHT B WEIGHT C WEIGHT D idi LBS KG LBS KG LBS KG 18 KG LBS KG X Y 1 48HC17 1892 860 401 182 449 204 565 257 505 230 48 1219 67 3 8 17111 16 1 2 14191 STANDARD UNIT WEIGHT IS WITH LOW GAS HEAT AND WITHOUT PACKAGING FOR OTHER OPTIONS AND ACCESSORIES REFER TO THE PRODUCT DATA CATALOG Y CORNER CORNER D CORNER C TOP doy FRONT C10897 Fig 1 Unit Dimensional Drawing 17 Size Unit cont HORIZONTAL RETURN AIR W O ECONOMIZER HORIZONTAL HORIZONTAL SUPPLY AIR m 53 3 4 113651 19 1 4 p 489 6 1 4 25 1 2 6 1 4 1571 649 NOTES 1 DIMENSIONS ARE IN INCHES DIMENSIONS IN 1 A
84. or select unit location 3 Check for possible overhead obstructions which may interfere with unit lifting or rigging Step 1 Plan for Unit Location Select a location for the unit and its support system curb or other that provides for the minimum clearances required for safety This includes the clearance to combustible surfaces unit performance and service access below around and above unit as specified in unit drawings See Fig 4 NOTE Consider also the effect of adjacent units C10638 Fig 4 Service Clearance Dimensional Drawing Be sure that the unit is installed such that snow will not block the combustion air intake or flute outlet Unit may be installed directly on wood flooring or on Class A B or C roof covering material when roof curb is used Do not install unit in an indoor location Do not locate air inlets near exhaust vents or other sources of contaminated air For proper unit operation adequate combustion and ventilation air must be provided in accordance with Section 5 3 Air for Combustion and Ventilation of the National Fuel Gas Code ANSI Z223 1 American National Standards Institute and NFPA National Fire Protection Association 54 TIA 54 84 1 In Canada installation must be in accordance with the CAN1 B149 installation codes for gas burning appliances Although unit is weatherproof avoid locations that permit water from higher level runoff and overhangs to fall onto the unit Loca
85. outdoor air CO sensor must be located in the economizer outside air hood Wiring the Outdoor Air Sensor A dedicated power supply is required for this sensor A two wire cable is required to wire the dedicated power supply for the sensor The two wires should be connected to the power supply and terminals 1 and 2 To connect the sensor to the control identify the positive 4 to 20 mA and ground SIG COM terminals on the OAQ sensor See Fig 46 Connect the 4 to 20 mA terminal to RTU Open terminal J4 5 Connect the SIG COM terminal to RTU Open terminal J4 6 See Fig 64 OAQ Sensor RH Sensor MN o e 24 VAC C10739 Fig 64 Open Outdoor CO Sensor 33ZCSENCO2 Connections Space Relative Humidity Sensor or Humidistat Humidi MiZer Control Wiring In units equipped with the Humidi MiZer option there are two pink PNK wires loose in the control box used to control the dehumidification function of the unit These pink wires are meant to be tied to a space humidistat or thermidistat on an electromechanical unit On RTU Open equipped units these pink wires must be connected to J11 7 amp 8 to allow the Open board to operate the dehumidification function for the unit Disconnect the J11 Phoenix style connector from the board and use the plug screws to secure the pink wires in pins 7 and 8 reconnect the plug to the board at J11 Relative Humidity Sensors Space or Duct Mounted The accessory space humidity
86. provided for low voltage An additional 7 g in knock out is provided for a 115 volt line which is used when the unit is equipped with the non unit powered convenience outlet option All required fittings are field supplied Install fittings when access to both top and bottom of the base pan is available See electrical and gas connections for routing and connection information Units without Thru Base Connections 1 Install liquid tight conduit between disconnect and control box 2 Pull correctly rated high voltage wires through the conduit 3 Install power lines to terminal connections as shown in Fig 25 Field Control Wiring The 48HC unit requires an external temperature control device This device can be a thermostat field supplied or a PremierLink controller available as factory installed option or as field installed accessory for use on a Carrier Comfort Network or as a stand alone control or the RTU Open for Building Management Systems using non CCN protocols RTU Open is available as a factory installed option only Thermostat Install a Carrier approved accessory 2 stage thermostat according to installation instructions included with the accessory Locate the thermostat accessory on a solid wall in the conditioned space to sense average temperature in accordance with the thermostat installation instructions If the thermostat contains a logic circuit requiring 24 v power use a thermostat cable or e
87. puts 3 5 8 or 9 to Filter Status and normally open N O or normally closed N C Input 8 or 9 is recommended for easy of installation Refer to Fig 57 and Fig 58 or 59 for wire terminations at J5 Fan Status The fan status accessory is a field installed accessory This accessory detects when the indoor fan is blowing air When installing this accessory the unit must be configured for status setting MENU Config Inputs 3 5 8 or 9 to Fan Status and normally open N O or normally closed N C Input 8 or 9 is recommended for easy of installation Refer to Fig 57 and Fig 58 or 59 for wire terminations at J5 Remote Occupancy The remote occupancy accessory is a field installed accessory This accessory overrides the unoccupied mode and puts the unit in occupied mode When installing this accessory the unit must be configured for remote occupancy by setting MENU Config Inputs 3 5 8 or 9 to Remote Occupancy and normally open N O or normally closed N C Also set MENU Schedules occupancy source to DI on off Input 8 or 9 is recommended for easy of installation Refer to Fig 57 and Table 9 for wire terminations at J5 Power Exhaust output The relay used by the RTU Open board to control power exhaust is a dry contact which means it does not have 24vac This 24vac must be connected to the relay to allow it to operate the power exhaust relay in the PE accessory A 24vac source must b
88. quivalent single leads of different colors with minimum of seven leads If the thermostat does not require a 24 v source connection required use a thermostat cable or equivalent with minimum of six leads Check the thermostat installation instructions for additional features which might require additional conductors in the cable For wire runs up to 50 ft 15 m use no 18 AWG American Wire Gage insulated wire 35 C minimum For 50 to 75 ft 15 to 23 m use no 16 AWG insulated wire 35 C minimum For over 75 ft 23 m use no 14 AWG insulated wire 35 C minimum All wire sizes larger than no 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat Unit without Thru Base Connection Kit Correctly rated low voltage wire can be routed through the rubber grommet located on the corner post adjacent to the control box access panel Route wire through the grommet and then route the wire behind the corner post utilizing the factory provided wire ties secured to the control box This will insure separation of the field low voltage wire and the high voltage circuit Route the low voltage wire to the central terminal board See Fig 30 22 Central Typical Terminal Thermostat Board Corrections 6 x c cU pans G G
89. r signal pins must be wired to the signal ground pins Wiring connections for CCN must be made at the 3 pin plug At any baud 9600 19200 38400 baud the number of controllers is limited to 239 devices maximum Bus length may not exceed 4000 ft 1219 m with no more than 60 total devices on any 1000 ft section Optically isolated RS 485 repeaters are required every 1000 ft 305 m NOTE Carrier device default is 9600 baud Communications Bus Wire Specifications The CCN Communication Bus wiring is field supplied field installed It consists of shielded 3 conductor cable with drain ground wire The cable selected must be identical to the CCN Communication Bus wire used for the entire network See Table 7 for recommended cable Table 7 Recommended Cables MANUFACTURER CABLE PART NO Alpha 2413 or 5463 NOTE Conductors and drain wire must be at least 20 AWG stranded and tinned copper Individual conductors must be insulated with PVC PVC nylon vinyl Teflon or polyethylene An aluminum polyester 100 foil shield and an outer jacket of PVC PVC nylon chrome vinyl or Teflon with a minimum operating temperature range of 20 C 4 F to 60 C 140 F is required Do not run communication wire in the same conduit as or next to any AC voltage wiring The communication bus shields must be tied together at each system element If the communication bus is entirely within one building the resulting continuous shi
90. r Hood Flue Hood C10744 Fig 16 Flue Hood and Combustion Air Hood Details Step 10 Install Gas Piping Installation of the gas piping must be in accordance with local building codes and with applicable national codes In U S A refer to NFPA 54 ANSI Z223 1 National Fuel Gas Code NFGC In Canada installation must be accordance with the CAN CSA B149 1 and CAN CSA B149 2 installation codes for gas burning appliances This unit is factory equipped for use with Natural Gas fuel at elevations up to 2000 ft 610 m above sea level Unit may be field converted for operation at elevations above 2000 ft 610 m and or for use with liquefied petroleum fuel See accessory kit installation instructions regarding these accessories NOTE Furnace gas input rate on rating plate is for installation up to 2000 ft 610 m above sea level In U S A the input rating for altitudes above 2000 ft 610 m must be derated by 4 for each 1000 ft 305 m above sea level In Canada the input rating must be derated by 10 for altitudes of 2000 ft 610 m to 4500 ft 1372 m above sea level For natural gas applications gas pressure at unit gas connection must not be less than 5 in wg 1246 Pa or greater than 13 in wg 3240 Pa while the unit is operating For liquified petroleum applications the gas pressure must not be less than 11 in wg 2740 or greater than 13 in wg 3240 Pa at the unit connection Gas Supply Line The gas
91. s which will result in enhanced installation reliability or operation WARNING FIRE EXPLOSION HAZARD Failure to follow this warning could result in personal injury or death Disconnect gas piping from unit when leak testing at pressure greater than 0 5 psig 3450 Pa Pressures greater than 0 5 psig 3450 Pa will cause gas valve damage resulting in hazardous condition If gas valve is subjected to pressure greater than 0 5 psig 3450 Pa it must be replaced before use When pressure testing field supplied gas piping at pressures of 0 5 psig 3450 Pa or less a unit connected to such piping must be isolated by closing the manual gas valve WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could cause personal injury or death Before performing service or maintenance operations on unit always turn off main power switch to unit and install lock s and lockout tag s Unit may have more than one power switch WARNING UNIT OPERATION AND SAFETY HAZARD Failure to follow this warning could cause personal injury death and or equipment damage Puron R 410A refrigerant systems operate at higher pressures than standard R 22 systems Do not use R 22 service equipment or components on Puron refrigerant equipment WARNING PERSONAL INJURY AND ENVIRONMENTAL HAZARD Failure to follow this warning could cause personal injury or death Relieve pressure and recover all refrigerant before sys
92. sensor 33ZCSENSRH 01 or duct humidity sensor 33ZCSENDRH O1 is used to measure the relative humidity of air within the space or return air duct The RH reading is used to control the Humidi MiZer option of the rooftop unit For wiring distances up to 500 ft 152 m use a 3 conductor 18 or 20 AWG shielded cable The shield must be removed from the sensor end of the cable and grounded at the unit end The current loop power for sensor is provided by the RTU Open controller as 24vdc Refer to the instructions supplied with the RH sensor for the electrical requirements and terminal locations Open configurations must be changed after adding an RH sensor See Fig 65 and 66 for typical RH sensor wiring J4 1 or J4 4 24vdc loop power 4 2 or J4 5 4 20mA signal input NOTE The factory default for dehumidification control is normally open humidistat MOUNTING HOLES lo Vin Gnd vo WIRING OPENING Vin J4 1 or 4 4 24Vdc lo J4 2 or J4 5 20mA output C11087 Fig 65 Space Relative Humidity Sensor Typical Wiring 41 48HC J4 1 or J4 4 24 VDC Supply Voltage J4 2 or J4 5 4 to 20 mA Current Loop Output to RTU OPEN Relative Humidity Sensor Polarized Male Connector 4 20 VAC GND 0 5V mA or or 0 10V C10839 Fig 66 D
93. stall a jumper between SEN and SET terminals as illustrated Connect T 56 terminals to TB3 terminals 1 3 and 5 see Fig 44 9 CCN COM SENSOR WIRING JUMPER TERMINALS AS SHOWN 08202 Fig 43 T 56 Internal Connections TB3 PL lt TB3 PL 74 GET GET C10022 Fig 44 PremierLink T 56 Sensor Connect Thermostat A 7 wire thermostat connection requires a 24 v power source and a common connection Use the R and C terminals on the CTB s THERMOSTAT connection strip for these Connect the thermostat s Y1 Y2 W1 W2 and G terminals to PremierLink TB3 as shown in Fig 45 If the 48HC unit is equipped with factory installed smoke detector s disconnect the factory BLU lead at TB3 6 Y2 before connecting the thermostat Identify the BLU lead originating at CTB DDC 1 disconnect at TB3 6 and tape off Confirm that the second BLU lead at TB3 6 remains connected to PremierLink J4 8 SPACE CTB THERMOSTAT THERMOSTAT CTB THERMOSTAT C10283 Fig 45 Space Thermostat Connections If the 48HC unit has an economizer system and free cooling operation is required a sensor representing Return Air Temperature must also be connected field supplied and installed
94. t both for 0 5V In 1 1 T 56 Accy e ad 10811 Fig 57 RTU Open Multi Protocol Control Board 36 575V ONLY FIOP PL19 A ACCESSORY POWER Loew gt gt MID TIER YAC CONTROL 208 230V 460V 575V LABEL RETURN CD RED six 208 230 460V ONLY SMOKE RJ 45 50HE502044 vio SENSOR wg Hon FROM POWER SCHEMATIC 3 TRAN Iw our SUPPLY ya yo 2 078009 SMOKE 7 4 RED 24V SENSOR 6 3 2
95. te mechanical draft system flue assembly at least 4 ft 1 2 m from any opening through which combustion products could enter the building and at least 4 ft 1 2 m from any adjacent building or per local code Locate the flue assembly at least 10 ft 3 05 m from an adjacent unit s fresh air intake hood if within 3 ft 0 91 m of same elevation or per local code When unit is located adjacent to public walkways flue assembly must be at least 7 ft 2 1 m above grade Select a unit mounting system that provides adequate height to allow installation of condensate trap per requirements Refer to Step 11 Install External Condensate Trap and Line for required trap dimensions Roof Mount Check building codes for weight distribution requirements Unit operating weight is shown in Table 1 Table 1 Operating Weights 48HC 17 UNIT LB KG 1892 858 2102 954 2247 1019 2292 1040 245 111 245 111 245 111 245 111 83 38 2 15 Humidi MiZer System 83 38 Curb 14 356 mm 24 610 mm 2 32 3 32 15 32 15 8 8 40 92 42 48HC Step 2 Plan for Sequence of Unit Installation The support method used for this unit will dictate different sequences for the steps of unit installation For example on curb mounted units some accessories must be installed on the unit before the unit is placed on the curb Review the following for recommended sequences for installatio
96. tem repair or final unit disposal Ware safety glasses and gloves when handling refrigerants Keep torches and other ignition sources away from refrigerants and oils CAUTION CUT HAZARD Failure to follow this caution may result in personal injury Sheet metal parts may have sharp edges or burrs Use care and wear appropriate protective clothing safety glasses and gloves when handling parts and servicing air conditioning equipment NOTES 1 DIMENS INT 2 My 3 gt HORTZONTAL RETURN AIR W O ECONOMIZER HORIZONTAL SUPPLY AIR 53 3 4 4 113651 19 1 4 ET Wer HR Hes 157 158 157 TONS ARE IN INCHES DIMENSIONS 1 ARE IN MILLIMETERS CENTER OF GRAVITY DIRECTION OF AIR FLOW 58 OUTDOOR AIR 68 1 8 115641 111211 HOOD OPTIONAL 1 14 1 8 13581 4 N 5 EM 1 1 8 2061 6 1 2 181 MES 11 167 3 1 4 12 118 12191 83 3291 14 1 8 1 1 4 DIA 32 13191 KNOCKOUT 50 1 2 TOP 112841 24 118 2 DIA 51 16301 HOLES i
97. ter is set at the switch See Fig 52 Filter Switch NO close on rising pressure high drop CTB Thermostat R TB3 PL Ss Qu C10286 Fig 52 PremierLink Filter Switch Connection When the filter switch s NO contact set closes as filter pressure drop increases indicating dirt laden filters the input signal to PremierLink causes the filter status point to read DIRTY Using Filter Timer Hours Refer to Form 33CS 67SI for instructions on using the PremierLink Configuration screens and on unit alarm sequence Supply Fan Status Switch The PremierLink control can monitor supply fan operation through a field supplied installed differential pressure switch This sequence will prevent or interrupt operation of unit cooling heating and economizer functions until the pressure switch contacts are closed indicating proper supply fan operation Install the differential pressure switch in the supply fan section according to switch manufacturer s instructions Arrange the switch contact to be open on no flow and to close as pressure rises indicating fan operation Connect one side of the switch s NO contact set to CTB s THERMOSTAT R terminal Connect the other side of the NO contact set to TB3 8 Setpoint for Supply Fan Status is set at the switch See Fig 53 Fan Pressure Switch NO close on rise in pressure CTB Thermostat TB3 PL 10287 Fig 53 PremierLink Wiring Fan Pressure Switch Connection
98. trol Box Access Panel Filter and Indoor Coil Access Panel Indoor Blower M Access Panel Gas Heat Access Panel Compressor each side C11154 Fig 5 Typical Access Panel and Compressor Locations Slab Mount Horizontal Units Only Provide a level concrete slab that extends a minimum of 6 in 150 mm beyond unit cabinet Install a gravel apron in front of condenser coil air inlet to prevent grass and foliage from obstructing airflow NOTE Horizontal units may be installed on a roof curb if required Alternate Unit Support In Lieu of Curb or Slab Mount A non combustible sleeper rail can be used in the unit curb support area If sleeper rails cannot be used support the long sides of the unit with a minimum of 4 equally spaced 4 in x 4 in 102 mm x 102 mm pads on each side Locate pads so that they support the rails Make sure to avoid the fork openings 10 e m 1 CRRFCURBO45A00 2 CRRFCURBO46A00 Z 27 3 1108 4 E 1108 41 CINSIDE 2 22 107 1 5 8 1308871 SUPPLY AIR __ L 18 OUTSIDE OPENING ALT GAS 0 4 5 1
99. uct Relative Humidity Sensor Typical Wiring Humidistat The accessory humidistat provides the RTU Open insight to the relative humidity in the space The humidistat reads the RH level in the space and compares it to its setpoint to operate a dry contact The humidistat is a dedicated input on the configurable input 9 and tells the RTU Open when the RH level is HIGH or LOW The normal condition for humidity is LOW A normally open humidistat is the factory default control for the Humidi MiZer option To wire in the field 15 8 24 VAC source for dry contact J5 7 Signal input Smoke Detector Fire Shutdown FSD On 48HC units equipped with factory installed Smoke Detector s the smoke detector controller implements the unit shutdown through its NC contact set connected to the units input The FSD function is initiated via the smoke detector s Alarm NO contact set The RTU Open controller communicates the smoke detector s tripped status to the BAS building control See Figs 58 and 59 the RTU Open wiring schematics The Fire Shutdown Switch configuration MENU Config Inputs input 5 identifies the normally open status of this input when there is no fire alarm Connecting Discrete Inputs Filter Status The filter status accessory is a field installed accessory This accessory detects plugged filters When installing this accessory the unit must be configured for filter status by setting MENU Config In
100. um 8 Amps Observez une limite de 50 sur le circuit Chargement au dessus de 8 Amps 10077 Fig 29 Convenience Outlet Utilization Notice Test the GFCI receptacle by pressing the TEST button on the face of the receptacle to trip and open the receptacle Check for proper grounding wires and power line phasing if the GFCI receptacle does not trip as required Press the RESET button to clear the tripped condition Using unit mounted convenience outlets Units with unit mounded convenience outlet circuits will often require that two disconnects be opened to de energize all power to the unit Treat all units as electrically energized until the convenience outlet power is also checked and de energization is confirmed Observe National Electrical Code Article 210 Branch Circuits for use of convenience outlets Factory Option Thru Base Connections All units are equipped with the ability to bring utilities through the base Gas is brought up through an embossed area located in the gas section behind the gas entrance post Access is gained through the gas access panel A knock out must be removed to accomplish this The electrical entrance is located in the control box area and can be accessed through the control box access panel An embossed area is provided with three knock outs High voltage is brought through the multi knock out by removing the appropriate size for the size of the fitting required 7 g in knock out is
101. y mounted in the 48 unit s main control box to the right of the Central Terminal 1 Board see Fig 37 Factory wiring is completed DISCONNECT IFC OFC through harnesses connected to the thermostat Field FIOP connections are made at a 16 pole terminal block TB3 located at the top of the unit control box in front of the PremierLink controller The factory installed PremierLink control includes supply air temperature SAT sensor The outdoor air temperature OAT sensor is included in the Emm EconoMi er 2 package See page 45 for En accessory enthalpy controls ae The PremierLink controller requires the use of a Carrier ooh electronic thermostat or a CCN connection for time broadcast to initiate its internal timeclock This is FIOP ACCY ACCY FIOP OFR CCHR1 CCHR2 RETURN SMOKE DETECTOR FIOP ACCY necessary for broadcast of time of day functions occupied unoccupied NOTE PremierLink controller is shipped in Sensor mode To be used with a thermostat the PremierLink controller must be configured to Thermostat mode Refer to PremierLink Configuration instructions for Operating Mode 26 C10643 Fig 37 48HC Control Box Component Locations

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