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Bryant 551B Air Conditioner User Manual

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1. OOO eS ey s EXTERNAL STATIC PRESSURE in wg eMe cell ze cd knot jJ 3 Crt Rem Bnp watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp wans Rpm Bhp 1 09 1 25 1 41 1 59 1 76 1 14 1 31 1 48 1 65 1 83 1 20 1 37 1 54 1 72 1 90 1 26 1 43 1 61 1 79 1 98 1 32 1 50 1 68 1 87 2 06 1 39 1 57 1 76 1 95 2 14 1 46 1 65 1 83 2 08 2 23 1 53 1 72 1 91 2 11 2 31 1 61 1 80 2 00 2 20 2 40 1 69 1 88 2 09 2 50 1 77 1 97 2 18 2 60 1 86 2 06 2 27 2 70 1 95 2 16 2 37 2 80 2 04 2 25 2 47 2 91 2 14 2 35 2 57 3 03 2 24 2 46 2 68 3 14 2 35 2 57 3 26 2 45 2 68 3 39 2 57 2 80 3 52 LEGEND NOTES Bhp Brake Horsepower Input to Fan 1 Boldface indicates field supplied drive is required Watts Input Watts to Motor 2 Maximum continuous bhp is 4 20 3 See page 23 for general fan performance notes Motor drive range 860 to 1080 rpm All other rpms require field e 9 supplied drive Table 26 Fan Performance 551B120 Horizontal Discharge Units Standard Motor Belt Drive EXTERNAL STATIC PRESSURE in wg AIRFLOW CFM NN N Ah O O O N m o N O O k mb k k k k k k OO p qO N N to Q gt to Q o NMONNNROMOI
2. 93 91 913 3 d M Al 93 l1U3A 93 91 1H913M AI 43 IN0NO23 93 81 LHOTAM LINA 4015 LINN Table 1 Physical Data UNIT 551B po 10 2310 i X 150 NOMINAL CAPACITY tons OPERATING WEIGHT Ib Unit IV Perfect Humidity Dehumidification Package Roof Curb COMPRESSOR Scroll Quantity Oil oz each compressor REFRIGERANT TYPE Expansion Device Operating Charge Ib oz Standard Unit Circuit 1 Circuit 2 Unit With Perfect Humidity Dehumidification Package Circuit 1 Circuit 2 CONDENSER FAN Quantity Diameter in Nominal Cfm Motor Hp Rpm Watts Input Total CONDENSER COIL Rows Fins in Total Face Area sq ft EVAPORATOR COIL Standard Unit Rows Fins in Total Face Area sq ft Unit with Perfect Humidity Dehumidification Package Rows Fins in Total Face Area sq ft EVAPORATOR FAN Centrifugal Type Belt Drive Size in 15x15 15x15 15x15 Nominal Cfm Standard 3000 3400 4000 5000 Maximum Continuous Bhp Standard 2 90 2 90 3 70 5 25 High Static 4 20 4 20 5 25 Motor Frame 56 56 56 56 Fan Rpm Range Standard 840 1085 840 1085 860 1080 830 1130 High Static 860 1080 860 1080 830 1130 Motor Bearing Type Ball Ball Ball Ball Maximum Fan Rpm 2100 2100 2100 2100 Motor Pulley Pitch Diameter A B in Standard 3 4 4 4 3 4 4 4 4 0 5 0 2 8 3 8 High Static 4 0 5 0 4 0 5 0 2 8 3 8
3. 7 5 TON 60HZ CAPPLICABLE ONLY WHEN COIL IS IN SUBCOOLING MODE OUTDOOR FAN MUST BE OPERATING 140 ni g 130 wo lt 120 CIRCUIT 1 CIRCUIT 2 8 9 ADD CHARGE IF ABOVE CURVE gt 44 p 100 lt amp a 90 2 REDUCE CHARGE IF BELOW CURVE 70 60 50 100 150 200 250 300 350 400 LIQUID PRESSURE LEAVING CONDENSER PSIG NOTE When using the charging charts it is important that only the subcooling reheat dehumidification coil liquid line solenoid valve be energized The subcool ing reheat dehumidification coil liquid line solenoid valve MUST be energized to use the charging charts and the outdoor motor speed controller jumpered to run the fan at full speed Fig 51 Cooling Charging Chart 581B090 With the Perfect Humidity Dehumidification System COOLING MODE CHARGING CHART 8 5 amp 10 TON 60HZ CAPPLICABLE ONLY WHEN COIL IS IN SUBCOOLING MODE OUTDOOR FAN MUST BE OPERATING 150 ni o B 140 m CIRCUIT 1 2 130 2 S ADD CHARGE IF ABOVE CURVE 120 ul pono lt 100 a 22 REDUCE CHARGE IF BELOW CURVE 80 70 50 100 150 200 250 300 350 400 LIQUID PRESSURE LEAVING C
4. LEGEND NOTES Bhp Brake Horsepower Input to Fan 1 Boldface indicates field supplied drive is required Watts Input Watts to Motor 2 Maximum continuous bhp is 5 25 3 See page 23 for general fan performance notes Motor drive range 830 to 1130 rpm All other rpms require field pag 3 supplied drive Table 22 Fan Performance 551B090 Horizontal Discharge Units Standard Motor Belt Drive EXTERNAL STATIC PRESSURE in wg AIRFLOW CFM md md d d d d OOO N o e e e 2 gt I O gt Q o N 2000000 LTE T T ih 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 Q N Q gt p gt L2O0 o0o0900mNOOROO OO00 AAA amp gt MO gt OD gt Q w O O O N Gi gt oo sN EXTERNAL STATIC PRESSURE wg AIRFLOW CFM N NS SNS N SDS O 606000 LEGEND NOTES Bhp Brake Horsepower Input to Fan 1 Boldface indicates field supplied drive is required Watts Input Watts to
5. N N cc N Oto O 2 0 58 0 63 0 68 0 74 0 80 0 86 0 93 1 00 1 07 1 15 1 23 1 31 1 40 1 49 1 59 1 69 1 80 1 91 2 02 2 14 2 26 S to gt G N to I P gt O 51 O amp G GO G OQ O O IN Q O N EXTERNAL STATIC PRESSURE wg AIRFLOW CFM gt O O gt O O O gt O O101 4010 O WHO gt gt gt P CO CO O PO O O N Q N O cO O 00 0000 C0 P O lt O O O O O aaa aua LEGEND NOTES Bhp Brake Horsepower Input to Fan 1 Boldface indicates field supplied drive is required Watts Input Watts to Motor 2 Maximum continuous bhp is 5 25 3 See page 23 for general fan performance notes Motor drive range 830 to 1130 rpm All other rpms require field pag 9 5 supplied drive Table 28 Fan Performance 551B150 Horizontal Discharge Units Standard Motor Belt Drive EXTERNAL STATIC PRESSURE in wg AIRFLOW CFM Q P o O N to p po N O amp oO
6. 24 24 Vac Vac COM Fig 34 EconoMi er IV Control 2 SENSOR MAX RANGE SETTING 6000 E 5000 amp zt O 4000 E 800 ppm 900 2 ppm 3000 g 4 1000 ppm z m 1100 ppm Q 2000 2 1000 oc 0 T T T T T T 2 3 4 5 6 7 8 DAMPER VOLTAGE FOR MAX VENTILATION RATE Fig 35 CO Sensor Maximum Range Setting 18 Exhaust Set Point Adjustment The exhaust set point will determine when the exhaust fan runs based on damper position if accessory power exhaust is installed The set point is modified with the Exhaust Fan Set Point EXH SET potentiometer See Fig 30 The set point represents the damper position above which the exhaust fans will be turned on When there is a call for exhaust the EconoMi er IV controller provides a 45 15 second delay before exhaust fan activation to allow the dampers to open This delay allows the damper to reach the appropriate position to avoid unnecessary fan overload Minimum Position Control There is a minimum damper position potentiometer on the IV controller See Fig 30 The minimum damper position maintains the minimum airflow into the building during the occupied period When using demand ventilation the minimum damper posi tion represents the minimum ventilation position for VOC volatile organic compound ventilation r
7. I gt gt N N aaa P Q o N O O O S G O 0 6 0 7 0 7 0 8 0 8 0 9 1 0 1 1 1 2 1 2 1 3 1 4 1 5 1 6 1 7 1 8 2 0 2 1 2 2 2 4 2 5 RODRIOONNNNDOAADOWDON O gt No Q G O 9 O DO EXTERNAL STATIC PRESSURE wg AIRFLOW CFM w PO O O N N O CO OO QO oN O N O O1 GO O OO Q gt S O O gt Q N OO B O OOO O N OI P B C5 C0 02 03 Co S S O IN TS INTO Tp A amp O FS 1 O O O O LEGEND NOTES Bhp Brake Horsepower Input to Fan 1 Boldface indicates field supplied drive is required Watts Input Watts to Motor 2 Maximum continuous bhp is 3 70 3 See page 23 for general fan performance notes Motor drive range 860 to 1080 rpm All other rpms require field pag 9 supplied drive Table 20 Fan Performance 551B120 Vertical Discharge Units High Static Motor Belt Drive
8. to I gt O O 0 O N 010 01 EXTERNAL STATIC PRESSURE wg AIRFLOW CFM IO S S IS NS TS IS Qo io 2 OQ CO Co 00 LI RABORONNNNOUS LEGEND NOTES Bhp Brake Horsepower Input to Fan 1 Boldface indicates field supplied drive is required Watts Input Watts to Motor 2 Maximum continuous bhp is 2 90 3 See page 23 for general fan performance notes Motor drive range 840 to 1085 rpm All other rpms require field pos 3 supplied drive Table 16 Fan Performance 551B090 Vertical Discharge Units High Static Motor Belt Drive EXTERNAL STATIC PRESSURE in wg AIRFLOW CFM b b b to N MO GQ G O IN N 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 OU P gt N CHODDAUGTANOA8BANADw Oo gt Gio SCHWOODANAAANWBNWOONAY OO p to x Q P O OQ O 0 0 N w 010 01 O Q DURA P O Q FS O 1 G Q O P O EXTERNAL STATIC PRESSURE in wg ew 22 2222 2 31 Se 512 X1
9. Nominal Motor Shaft Diameter in 7 8 7 8 Fan Pulley Pitch Diameter Standard 8 0 5 8 High Static 5 8 Belt Quantity Type Length in Standard High Static Pulley Center Line Distance in 1 51 1 46 15 85 17 50 1 46 15 85 17 50 Speed Change per Full Turn of Movable Pulley Flange rpm Standard High Static Movable Pulley Maximum Full Turns From Closed Position Standard High Static Factory Setting Full Turns Open Factory Speed Setting rpm Standard High Static Fan Shaft Diameter at Pulley in HIGH PRESSURE SWITCH psig Standard Compressor Internal Relief Differential Cutout Reset Auto LOSS OF CHARGE LOW PRESSURE SWITCH Liquid Line psig Cutout Reset Auto FREEZE PROTECTION THERMOSTAT Opens F Closes F 45 5 OUTDOOR AIR INLET SCREENS Cleanable Screen size and quantity varies by options selected RETURN AIR FILTERS Throwaway Quantity Size in 4 16 x 20 x2 4 20 x 20 x 2 LEGEND Bhp Brake Horsepower 4 16 x 20 x 2 4 20 x 20 x 2 V STEP 5 MAKE ELECTRICAL CONNECTIONS N WARNING Unit cabinet must have an uninter rupted unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur 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 Nationa
10. ADJUST FACTORY INSTALLED OPTIONS A Disconnect Switch The optional disconnect switch is non fused The switch has the capability of being locked in place for safety purposes B Perfect Humidity Dehumidification System Perfect Humidity system operation can be controlled by field installation of a Bryant approved humidistat Fig 11 or light commercial Thermidistat device Fig 12 To install the humidistat 1 Route humidistat cable through hole provided in unit corner post 2 Feed wires through the raceway built into the corner post to the 24 v barrier located on the left side of the control box See Fig 10 The raceway provides the UL required clearance between high voltage and low voltage wiring CONNECTION BOARD FACTORY INSTALLED DISCONNECT OPTION RACEWAY COMPRESSOR NO 2 COMPRESSOR NO 1 CONVENIENCE OUTLET OPTION Es r HOLE IN END PANEL Fig 10 Field Control Wiring Raceway Table 4 Heat Anticipator Settings 208 230 UNIT VOLTAGE 575 Po UNIT MES Configuration T Configuration 5 Ww WC p 9388 24 8 32 0 06 278 330 rcm 1202 UN Heater EX KW is based on heater voltage of 208 v 240 v 480 v or 575 v If power distribution voltage to unit varies from rated heater voltage heater kW will vary accordingly 3 Use a wire nut to connect humidistat cable i
11. Perfect Humidity CONTENTS Page SAFETY CONSIDERATIONS 1 1 37 Step 1 Provide Unit Support 1 ll Step 2 Field Fabricate Ductwork 1 Step 3 Install Condensate Drain Line and External 2 IV Step 4 Rig and Place Unit 2 V Step 5 Make Electrical Connections 7 VI Step 6 Adjust Factory Installed Options 11 VII Step 7 Adjust Evaporator Fan Speed 21 38 START UP seek on od ka 38 41 SERVICE t i iaa jer n Ren URS 41 45 TROUBLESHOOTING 46 49 INDEX s xs nae RR 50 START UP CHECKLIST CL 1 SAFETY CONSIDERATIONS Installation and servicing of air conditioning equipment can be hazardous due to system pressure and electrical compo nents Only trained and qualified service personnel should install repair or service air conditioning equipment Untrained personnel can perform basic maintenance func tions of cleaning coils and filters and replacing filters All other operations should be performed by trained service per sonnel When working on air conditioning equipment observe precautions in the literature tags and labels attached to the unit and oth
12. Temperature too low in conditioned area Reset thermostat Field installed filter drier restricted Outdoor ambient temperature below 25 F Install low ambient kit Compressor No 2 Unit in economizer mode Proper operation no remedy necessary Will Not Run Table 31 Perfect Humidity Dehumidification System Subcooling Mode Service Analysis PROBLEM CAUSE REMEDY Subcooling Mode Liquid Reheat No power to control transformer from Check power source and evaporator fan relay Ensure all wire Will Not Energize evaporator fan motor connections are tight No power from control transformer to liquid 1 Fuse open check fuse Ensure continuity of wiring line solenoid valve 2 Low pressure switch open Cycle unit off and allow low pressure switch to reset Replace switch if it will not close 3 Transformer bad check transformer Liquid line solenoid valve will not operate 1 Solenoid coil defective replace 2 Solenoid valve stuck open replace Liquid line solenoid valve will not open ve is stuck closed replace valve Low System Capacity Low refrigerant charge or frosted evapora 1 Check charge amount Charge per Fig 51 53 tor coil Evaporator coil frosted check and replace low pressure switch if necessary Loss of Compressor Superheat Thermostatic expansion valve TXV Check TXV bulb mounting and secure tightly to suction line Conditions with Subcooling Reheat Replace TXV if stuck open or closed Dehumid
13. supplied drive 37 PRE START UP WARNING Failure to observe the following warn ings could result in serious personal injury 1 Follow recognized safety practices and wear protective goggles when checking or servicing refrigerant system 2 Do not operate compressor or provide any elec tric power to unit unless compressor terminal cover is in place and secured 3 Do not remove compressor terminal cover until all electrical sources are disconnected and prop erly tagged 4 Relieve all pressure from system before touch ing or disturbing anything inside terminal box if refrigerant leak is suspected around compres sor terminals Use accepted methods to recover refrigerant 5 Never attempt to repair soldered connection while refrigerant system is under pressure 6 Donot usetorch to remove any component Sys tem contains oil and refrigerant under pres sure To remove a component wear protective goggles and proceed as follows a Shut off electrical power to unit and install lockout tag b Relieve all pressure from system using both high and low pressure ports Use accepted methods to recover refrigerant c Cut component connection tubing with tub ing cutter and remove component from unit d Carefully unsweat remaining tubing stubs when necessary Oil can ignite when exposed to torch flame Proceed as follows to inspect and prepare the unit for initial start up 1 Remove all access panels 2 Rea
14. 31 8 42 4 125 150 114 129 301 301 51 51 305 305 7 8 10 4 1 25 51 51 305 305 HIGH YES 187 254 0 13 1 105 0 12 0 16 0 f 1 I 70 70 56 62 305 305 STATIC 18 6 24 8 90 100 77 86 305 305 24 0 32 0 1 110 125 94 106 305 305 31 8 42 4 150 150 119 135 305 305 e JE Hh EE 460 3 60 HIGH dq er HIGH STATI YES 414 508 55 0 See page 10 for legend and notes UNIT NOMINAL 551B V PH Hz STATIC HIGH STATIC 575 3 60 208 230 3 60 460 3 60 575 3 60 208 230 3 60 460 3 60 575 3 60 See page 10 for legend and notes HIGH STATIC HIGH STATIC HIGH STATIC HIGH STATIC HIGH STATIC HIGH STATIC I 0 I STD STD CONV OUTLET Table 2 Electrical Data cont VOLTAGE RANGE COMP NO 1 o o I o o o Zt o 19 0 P COMP NO 2 OFM OFM IFM QTY FLA FLA B A A A RI EN o o AY gt 28 mi a m P 1 gt 5 S N gt o n e o o e i o o lt o ES ES EN ELECTRIC HEATER HEATER 7 8 10 4 12 0 16 0 24 0 32 0 31 8 42 4 37 5 50 0 21 7 25 0 33 4 38 5 66 7 77 0 88 4 102 0 104 2 120 3 21 7 25 0 33 4 38 5 66 7 7
15. 341 341 341 341 341 341 341 341 341 341 345 345 345 345 345 345 345 345 345 345 345 345 364 364 364 364 364 364 364 364 364 364 364 364 369 369 369 369 369 369 369 369 369 369 369 369 426 426 426 426 426 426 426 426 426 426 426 426 431 431 431 431 431 431 431 431 431 431 431 431 LEGEND AND NOTES FOR TABLE 2 LEGEND Example Supply voltage is 460 3 60 FLA Full Load Amps AB 452 HACR Heating Air Conditioning and Refrigeration B C BC Ao V IFM Indoor Evaporator Fan Motor AC 455 v LRA Locked Rotor Amps T MCA Minimum Circuit Amps U 452 464 455 MOCP Maximum Overcurrent Protection C US Average Voltage NEC National Electrical Code OFM Outdoor Condenser Fan Motor 1371 RLA Rated Load Amps Heater capacity kW is zased on heater voltage of 208 240 480 and 575 V If power 457 distribution voltage varies from rated heater voltage heater kW will vary accordingly TUsed to determine minimum disconnect per NEC 3 TAB 457 from average wattage NOTES 464 457 2 7 v 1 In compliance with NEC requirements for multimotor and combination load equip AC 457 455 22v ment refer to NEC Articles 430 and 440 the overcurrent protective device for the Maximum deviation is 7 v unit shall be fuse or HACR breaker Determine percent of voltage imbalance 2 Unbalanced 3 Phase Supply Voltage Never
16. 38 4 41 7 018 019 NOTES 1 The rated heater voltage is 240 480 and 575 v If power distribution voltage varies from rated heater voltage heater kW vary accordingly 2 To determine heater kW at voltages other than those shown in table use the following formula Heater kW new Heater kW rated x unit power distribution voltage rated heater voltage 2 As an example For a 16 kW heater rated at 240 v with a power distribution voltage of 215 v kW new 16 kW 215 240 2 kW new 12 8 kW rating at 215 v 10 B Field Control Wiring Install a Bryant approved accessory thermostat assembly according to installation instructions induded with the accessory Locate thermostat assembly on a solid wall in the conditioned space to sense average temperature in accor dance with thermostat installation instructions Route thermostat cable or equivalent single leads of colored wire from subbase terminals to low voltage connections on unit shown in Fig 9 as described in Steps 1 through 4 below NOTE For wire runs up to 50 ft use no 18 AWG American Wire Gage insulated wire 35 C minimum For 51 to 75 ft use no 16 AWG insulated wire 35 C minimum For over 75 ft use no 14 AWG insulated wire 35 C minimum All wire larger than no 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat 1 If mounted on a roof curb and electrical power is to be run through the base
17. EXTERNAL STATIC PRESSURE in wg AIRFLOW CFM O6qO0v0d00oO0 o2NB ONO NN Q N N P Q N N G O N N NI gt Q o 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 OG p N P N N RODBAOONNNNDOABDOODOH OO Q o NI gt 0 Q N 5310000 O gt o O Q gt t NEO EXTERNAL STATIC PRESSURE in wg AIRFLOW CFM N amp O G FS 1 O O O Qt NI Q gt o O gt O to KRDHDORODOAONGARRROON gt gt gt Q gt O O I Q gt G O N Q G lo to I G gt o O Q Q gt 02 aa LEGEND NOTES Bhp Brake Horsepower Input to Fan 1 Boldface indicates field supplied drive is required Watts Input Watts to Motor 2 Maximum
18. and condenser fans start The condenser fan motors run continuously while unit is in cool ing If the thermostat calls for a second stage of cooling by energizing Y2 compressor contactor no 2 C2 is energized and compressor no 2 starts B Heating Units Without EconoMi er IV If Accessory Heater is Installed Upon a call for heating through terminal W1 IFC and heater contactor no 1 HC1 are energized On units equipped for 2 stages of heat when additional heat is needed HC2 is energized through W2 C Cooling Units With EconoMi er IV When free cooling is not available the compressors will be controlled by the zone thermostat When free cooling is avail able the outdoor air damper is modulated by the EconoMi er IV control to provide a 50 to 55 supply air temperature into the zone As the supply air temperature fluctuates above 55 or below 50 F the dampers will be modu lated open or dose to bring the supply air temperature back within the set point limits For IV operation there must be a thermostat call for the fan G This will move the damper to its mini mum position during the occupied mode Above 50 F supply air temperature the dampers will modu late from 10096 open to the minimum open position From 50 F to 45 F supply air temperature the dampers will main tain at the minimum open position Below 45 F the dampers will be completely shut As the supply air temperature rises the dam
19. and jumper positions are also shown An EconoMi er IV simulator program is avail able from Bryant to help with EconoMi er IV training and troubleshooting IV Preparation This procedure is used to prepare the EconoMi er IV for troubleshooting No troubleshooting or testing is done by performing the following procedure NOTE This procedure requires a 9 v battery 1 2 kilo ohm resistor and a 5 6 kilo ohm resistor which are not supplied with the EconoMi er IV IMPORTANT Be sure to record the positions of all potenti ometers before starting troubleshooting 1 Disconnect power at TR and 1 All LEDs should be off Exhaust fan contacts should be open 2 Disconnect device at P and P1 J umper P to P1 4 Disconnect wires at T and T1 Place 5 6 kilo ohm resistor across T and T1 5 Jumper TR to 1 6 Jumper TR to N 7 f connected remove sensor from terminals So and Connect 1 2 kilo ohm 4074EJM checkout resistor across terminals So and 8 Put 620 ohm resistor across terminals Sp and 9 Set minimum position DCV set point and exhaust potentiometers fully CCW counterclockwise 10 Set DCV maximum position potentiometer fully CW clockwise 11 Set enthalpy potentiometer to D 12 Apply power 24 vac toterminals TR and TR1 w B Differential Enthalpy To check differential enthalpy 1 Make sure EconoMi er IV preparation procedure has been performed 2 Place 620 ohm resi
20. must be installed before unit is set on roof curb IMPORTANT The gasketing of the unit to the roof curb is critical for a watertight seal nstall gasket supplied with the roof curb as shown in Fig 2 Improperly applied gasket can also result in air leaks and poor unit performance Curb should be level This is necessary for unit drain to func tion properly Unit leveling tolerances are shown in Fig 3 Refer to Accessory Roof Curb Installation Instructions for additional information as required B Slab Mount Horizontal Units Only Provide a level concrete slab that extends a minimum of 6 in beyond unit cabinet Install a gravel apron in front of con denser coil air inlet to prevent grass and foliage from obstructing airflow NOTE Horizontal units may be installed on a roof curb if required C Alternate Unit Support 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 3 equally spaced 4 in x 4 in pads on each side STEP 2 FIELD FABRICATE DUCTWORK On vertical discharge units secure all ducts to roof curb and building structure Do not connect ductwork to unit For hori zontal applications field supplied flanges should be attached to horizontal discharge openings and all ductwork attached to the flanges Insulate and weatherproof all external duct work joints and roof openings with
21. 1 AI 83 180N093 d 01 1061 91 6 E 153 9NIN3d0 NYNLSY 1102 LX 162 8 1 0 H3NHOO QO0H AI H3 1WONO23 U3SN3QNOO 15 YAMOd AI H3 INONOO3 d 56013 8 E v E TANVd SS399V H3ZIWONOO3 U31 114 3015110 5 4015 1441 69511 159 28 2 S t 291 6 6 0 9111 91 6 7 0 LINN 40 WO1108 1103 438N30NO29 NOIIV201 193NNO2SIQO V2IU123 13 100 320N 4405 YAMOd 151 vid Zla 3lVSN3ONO2 14 tl t E 3 9NINIM 1081 03 01314 ZZ vid 8 2101 1404 Crh 10 6 15 100 320N 14405 H3MOd 1991 10 2 1 218 310H 14405 YAMOd 01314 SE VIO 878 1 53215 NOI193NNOO 2179 3SV8 JHL 40 01108 SHI dn 051 ONY 021 ZOL 303 0191 0 c 050 l SI ALIAVH9 40 H31N32 WOILYAA JHL 8 1 9NINSAOO 3004 2 HO 8 V 55 19 YO GOOM WOuUJ 3QvW 590014 3181451805 NO Q3TIVISNI 38 AVN SLINN 72 3ONvuv3 Oo ON S3SUInO3H dQvOlHHV8 HO 39N34 318VAOW3H V gt 05 SJLON NI 31 15 SV 1109 UJSN3QNOO 3Hl 3ONVuV3 O JHL 40 NOILd3OX3 HLIM 9 350 SI NIVHO 31VSN3QNOD 31VNH3l V 3Hl N3HM S3HONI QN3 0134 ONY 4405 TV1NOZIWOH O3N 334 NI 3QIS JOHlNOO S32vJuns q3aNnouo YSHLO STIVM 31382NOO YO 32018 LINN N33M
22. Performance tables to determine indoor blower rpm and watts GENERAL FAN PERFORMANCE NOTES 1 Extensive motor and electrical testing on these units ensures that the full range of the motor can be utilized with confidence Using fan motors up to the ratings shown will not result in nuisance trip ping or premature motor failure Unit warranty will not be affected For additional information on motor performance refer to Evapora tor Fan Motor Data Tables 11 and 12 35 2 3 4 Values include losses for filters unit casing and wet coils See Tables 13 and 14 and Fig 36 for accessory FIOP static pressure information Use of a field supplied motor may affect wire sizing Contact Bryant representative to verify Interpolation is permissible Do not extrapolate Table 15 Fan Performance 551B090 Vertical Discharge Units Standard Motor Belt Drive EXTERNAL STATIC PRESSURE in wg AIRFLOW CFM to P Q N O GQ Gi O IN DONO t O6mO O0E amp 0090 Q0420014 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 gt 0 Q1 Q QI O N O O N N e M O O O OOO io gt Oi I SCHWOODAN S2ANWBNOONDL m
23. UNIT TROUBLESHOOTING Refer to Tables 30 32 for additional information Table 30 Cooling Troubleshooting PROBLEM CAUSE REMEDY Compressor s and Power failure Call power company mir A Will Not Start Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective thermostat contactor transformer Replace component control relay See problem Excessive Head Pressure Compressor s Will Not Faulty v wiring or loose connections in compressor Check wiring and repair or replace Start but Condenser Fan circuit Runs Compressor motor s burned out seized or internal Determine cause Replace compressor s overload open Defective overload Determine cause and replace One leg of 3 phase power dead Replace fuse or reset circuit breaker Determine cause Other Than Normally to nameplate Satisfying Thermostat Compressor s Operates Continuously Scroll Compressor s Compressor s rotating in the wrong direction Reverse the 3 phase power leads as described in Makes Excessive Noise Start Up section page 38 Excessive Head Pressure Dirty air filter Replace filter Dirty condenser coil Clean coil Refrigerant overcharged Remove excess refrigerant Air in system Recover refrigerant evacuate system to 500 microns and recharge Head Pressure Too Low Excessive Suction Suction Pressure Too Low Insufficient evaporator airflow Increase air quantity Check filter and replace if necessary
24. chart to deter mine that the range configuration for the CO sensor should be 1800 ppm The EconoMi er IV controller will output the 6 7 volts from the CO sensor to the actuator when the CO concentration in the spaceis at 1100 ppm The DCV set point may be left at 2 volts since the CO sensor voltage will be ignored by the IV controller until it rises above the 3 6 volt setting of the minimum position potentiometer Once the fully occupied damper position has been deter mined set the maximum damper demand control ventilation potentiometer to this position Do not set to the maximum position as this can result in over ventilation to the space and potential high humidity levels CO Sensor Configuration The CO sensor has preset standard voltage settings that can be selected anytime after the sensor is powered up See Table 7 Use setting 1 or 2 for Bryant equipment See Table 7 1 Press Clear and Mode buttons Hold at least 5 sec onds until the sensor enters the Edit mode 2 Press twice The STDSET Menu will appear 3 Use the Up Down button to select the preset number See Table 7 4 Press Enter tolock in the selection 5 Press Mode to exit and resume normal operation The custom settings of the CO sensor can be changed any time after the sensor is energized Follow the steps below to change the non standard settings 1 Press Clear and Mode buttons Hold at least 5 sec onds until the se
25. considerations J Safety relief 39 Service 41 45 Service ports 38 Slab mount 1 Start up 38 41 Start up checklist CL 1 Supply air temperature sensor 14 Thermostat 11 Troubleshooting 46 49 Ventilation 39 Weight Comer 5 5 6 Perfect Humidity dehumidification 6 Unit 4 6 Wiring EconoMiSerIV 15 Humidistat 12 Perfect Humidity system 12 Power connections 7 Printed in U S A CATALOG NO 04 53551004 01 Copyright 2005 Bryant Heating amp Cooling Systems START UP CHECKLIST Remove and Store in Job File PRELIMINARY INFORMATION MODEL DATE BUILDING LOCATION SERIAL NO TECHNICIAN PRE START UP insert checkmark in box as each item is completed SETSCREW IS TIGHT 00 EVE ELE Eel SHARP METAL EDGES START UP ELECTRICAL SUPPLY VOLTAGE L1 L2 CIRCUIT 1 COMPRESSOR AMPS L1 CIRCUIT 2 COMPRESSOR AMPS L1 EVAPORATOR FAN AMPS L1 TEMPERATURES OUTDOOR AIR TEMPERATURE DB RETURN AIR TEMPERATURE DB COOLING SUPPLY AIR DB PRESSURES REFRIGERANT SUCTION CIRCUIT 1 REFRIGERANT SUCTION CIRCUIT 2 REFRIGERANT DISCHARGE CIRCUIT 1 REFRIGERANT DISCHARGE CIRCUIT 2 PSIG AT PSIG AT PSIG AT PSIG AT L2 L3 L2 L2 L2 WB WB WB VERIFY JOBSITE VOLTAGE AGREES WITH VOLTAGE LISTED ON RATING PLATE VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS CHECK THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT CHECK THAT RETURN INDOOR SECTION AIR FILTERS ARE CLE
26. operate a motor where a phase imbalance in supply voltage is greater than Voltage Imbalance 100 x 2 Use the following formula to determine the percent of voltage imbalance 457 Voltage Imbalance 1 53 100 x Max voltage deviation from average voltage This amount of phase imbalance is satisfactory as it is below the maximum allow average voltage able 2 IMPORTANT If the supply voltage phase imbalance is more than 2 contact your local electric utility company immediately 3 Non fused disconnect switch cannot be used when rooftop unit electrical ratings exceed 80 amps Table 3 Electric Heater Usage ACCESSORY HEATER ACCESSORY SINGLE POINT BOX PART NUMBER PART NUMBER CRHEATER A00 CRSINGLE A00 aes 017 208 230 24 12 0 14 7 16 0 010 18 6 22 8 24 8 011 24 0 29 4 32 0 012 31 8 39 0 42 4 0124017 E 460 480 15 2 16 5 8 phase 25 6 27 8 30 4 33 0 38 4 41 7 78 98104 208 230 240 12 0 14 7 16 0 010 3 phase 18 6 22 8 24 8 011 24 0 29 4 32 0 012 31 8 39 0 42 4 0124017 128139 460 480 15 2 16 5 8 phase 25 6 27 8 30 4 33 0 38 4 41 7 2 208 230 24 12 0 14 7 16 0 010 24 0 29 4 32 0 012 31 8 38 9 42 4 0124017 37 5 46 0 50 0 010 012 12 8 13 9 460 480 15 2 16 5 3 phase 30 4 33 0 38 4 41 7 7 8 9 6 10 4 208 230 240 12 0 14 7 16 0 3 phase 24 0 29 4 32 0 31 8 38 9 42 4 0124017 37 5 46 0 50 0 0104012 1280 3 9 460 480 15 2 16 5 h 30 4 33 0 eS
27. wg See crt Rem Bnp watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp 1 06 1 19 33 1 46 1 60 1 12 1 26 40 1 54 1 68 1 19 1 34 48 1 62 1 77 1 26 1 41 56 1 71 1 86 1 34 1 49 64 1 80 1 95 1 42 1 57 73 1 89 2 05 1 50 1 66 82 1 98 2 15 1 58 1 75 92 2 08 2 25 1 67 1 84 2 36 1 76 1 94 2 47 1 86 2 04 2 58 1 96 2 14 2 70 2 06 2 25 2 83 2 17 2 37 2 28 2 48 2 40 2 61 2 52 2 73 2 65 2 86 2 78 LEGEND NOTES Bhp Brake Horsepower Input to Fan 1 Boldface indicates field supplied drive is required Watts Input Watts to Motor 2 Maximum continuous bhp is 2 90 3 See page 23 for general fan performance notes Motor drive range 840 to 1085 rpm All other rpms require field e 9 P supplied drive Table 18 Fan Performance 551B102 Vertical Discharge Units High Static Motor Belt Drive EXTERNAL STATIC PRESSURE in wg AIRFLOW CFM 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 P Q N gt Q Q Q gt gt a m p O N 0 020i 60006 nO0RO0A NN 5 gt o io m Q b N O MOdOqv0d0qO002NA IOmNO0OO0 N NNN c0c
28. 0NOo ad0900BN 200000200760 gt p Q S gt Q o O O023ROONO O0O0 0020600024fgM0O90 gt 2 a to 1 G O gt G to 00170 AKRBRAVNGAROONNNDAAOHANSAAOAAWERD 15 l O GQ b I On gt G N Q amp O cO 0100 G O O GQ G 000 1 1 1 1 ils 1 1 1 1 1 1 2 2 2 2 2 2 2 2 3 3 3 3 3 3 4 4 Bem an EXTERNAL STATIC PRESSURE wg AIRFLOW CFM AA gt gt P P P P C C O N N O O1 N O cO G S O OO gt 0 O1 N O O ci P RR GO CO CO GO N O NS INTO N INTO NS gt N gt I O G Po O O gt ON amp oROXO IO XO0BRBREO LEGEND NOTES Bhp Brake Horsepower Input to Fan 1 Boldface indicates field supplied drive is required Watts Input Watts to Motor 2 Maximum continuous bhp is 5 25 3 See page 23 for general fan performance notes Motor drive range 830 to 1130 rpm All other rpms require field pag 3
29. 138 3 5 H3d SE 3015 1041 03 S30vJuns GSGNNOYINN ONY LINN N33M138 O3N H3d NI 3QIS X09 10H1NO2 SLINA N33M138 NOI1VU3d0 3 H3SN3ONOO u3dOHd 3un55Vv 01 S3HONI OS QV3HH3A0 VWNOILdO SI 3 319339 9 11139 3015 H3HlO S3HONI 21 3015 3NO S3HONI SE HIV H3dOHd 304 1105 Hu35N3QNOO 1004 1 303 AYOMLONG Ol 3ONVHV3 IO HONI L 1 91419978 SLINQ 98 2510 TWLNOZIYOH NO S3HONI 0 8802 ONISN LON NAHM S3OV4uHfns 371811519002 01 WOLLOE CIIVA3Ud NOTLOTOSIYNS 30 53003 1V20D 3ONVHYV3IO WAWINIW S KINO 8803 53003 055432 01 GSHOVILV 38 01 AYOMLONG t NIV 30 NOIL123UIQ ALIAVH9 30 d31N39 e SU3IJALTTIW Suv 1 SNOISNAWIG S310N 303 S6v1 C l 8 E 0 ESE 828 B E geal SEL 008 91 95 82 cal c6 coc 0865 0518155 8 E 0 ESC 588 8 2 0l C vEL vec 256 22 021 06 661 Sle 516 0618155 8 E 0 ESC 588 8 2 01 LEL 88c Gil SZ 991 88 961 0 558 019155 958 8 11 6 2 050 CES 18 2 0 OLL vc v6 80c 79 ve v91 6 59 5 1 1 SZ 584 0609155 WW NI 14 WW NI 1d 93 Q LH9I3M H3NHOO 81 9 81 9 1 913 23 93 81 1H9I3M WH3NuOO 93 81 V LHOTSM
30. 242 7 8 10 4 i 242 242 j j 5 12 0 16 0 242 242 18 6 24 8 1 80 90 242 242 24 0 32 0 4 100 110 242 242 31 8 42 4 j 125 150 242 242 247 247 7 8 10 4 s 247 247 STD j 7 5 12 0 16 0 60 70 247 247 18 6 24 8 1 80 90 247 247 24 0 32 0 1 100 125 247 247 508 230 3 50 31 8 42 4 125 150 247 247 267 267 7 8 10 4 i 267 267 HIGH y 1 6 12 0 16 0 60 70 267 267 STATIC 18 6 24 8 80 90 267 267 24 0 32 0 1 100 110 267 267 31 8 42 4 j 125 150 267 267 ES 271 271 7 8 10 4 i 271 271 HIGH 6 12 0 16 0 70 70 271 271 STATIC 18 6 24 8 i 90 100 271 271 24 0 32 0 i 110 125 271 271 31 8 42 4 150 150 271 271 11111 460 3 60 575 3 60 u i 34 276 276 7 8 10 4 276 276 T 18 1 105 0 12 0 16 0 Y d 276 276 18 6 24 8 276 276 24 0 32 0 100 110 276 276 31 8 42 4 110 150 276 276 281 281 7 8 10 4 j 281 281 T 18 1 105 0 12 0 16 0 60 70 281 281 18 6 24 8 80 90 281 281 24 0 32 0 100 125 91 103 281 281 208 2303 60 31 8 42 4 125 150 116 131 281 281 1 j 301 301 7 8 10 4 46 46 301 301 HIGH 187 254 f 0 13 1 105 0 12 0 16 0 60 70 51 56 301 301 STATIC 18 6 24 8 80 90 72 81 301 301 24 0 32 0 100 110 89 101 301 301
31. 2A01 are for thru the curb gas type Packages CRBTMPWRO003A01 and 4A01 are for thru the bottom type gas connections SECTION C C SCALE 1 4 OPENING FOR BASEPAN ENTRY SERVICE SEE NOTE 8 SEE NOTE 2 SZ 0 4 3 0 0 7 16 111 2 6 15 16 1 2 7 8 0 0 7 16 BOLT HEADS 17861 0 3781 EADS RIGID INSULATION FIELD SUPPLIED 0 0 7 15 0 0 7 16 4 111 aa l 0 2 1 8 BOLT HEADS BOLT HEADS a 54 4 1 1 1 Fd 4 GAS SERVICE a PLATE SEE NOTE 8 1 8 3 16 5132 CINSIDE S Li SUPPLY AIR RETURN S N VIEW HEAD OF BOLT TO BE ON INSIDE OF FLANGE 12641 2 TYP ALL CORNERS or SEE VIEW 7828 Fig 2 Roof Curb Details Q gt 0 4 5 16 11101 INSIDE 1 ISS I 0 2 751 1 8 3 16 513 INSIDE NOTE CAMBRIDGEPORT SURE LOCK CORNER FASTENING DEVICE IS ACCEPTABLE ALTERNATE CONSTRUCTION B MAXIMUM ALLOWABLE DIFFERENCE AB AC 05 10 10 Fig 3 Unit Leveling Tolerances HORIZONTAL DRAIN PLUG DRAIN OUTLET NOTE Drain plug is shown in factory installed position Fig 4 Condensate Drain Location MINIMUM PITCH ONE IN PER 10 FT OF LINE TO ROOF DRAIN DRAIN PLUG NOTE Trap should be deep enough to offset maximum unit static differ ence A 4 in trap is recommen
32. 5 2 14 1 46 1 65 1 83 2 08 2 23 1 53 1 72 1 91 2 11 2 31 1 61 1 80 2 00 2 20 2 40 1 69 1 88 2 09 2 50 1 77 1 97 2 18 2 60 1 86 2 06 2 27 2 70 1 95 2 16 2 37 2 80 2 04 2 25 2 47 2 14 2 35 2 57 2 24 2 46 2 68 2 35 2 57 2 80 2 45 2 68 2 57 2 80 LEGEND NOTES Bhp Brake Horsepower Input to Fan 1 Boldface indicates field supplied drive is required Watts Input Watts to Motor 2 Maximum continuous bhp is 2 90 3 See page 23 for general fan performance notes Motor drive range 840 to 1085 rpm All other rpms require field 3 4 supplied drive 33 Table 25 Fan Performance 551B102 Horizontal Discharge Units High Static Motor Belt Drive EXTERNAL STATIC PRESSURE in wg AIRFLOW CFM 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 gt N 0 gt P m lt Q G O N to to OD NN ass anni sis si O0 m P gt 0 N N N N gt 5 G Q t N O gt N Z G G G Q amp Q O O Q N 00 OOO m n N O Q O O Q G Q G O
33. 7 0 88 4 102 0 104 2 120 3 21 7 25 0 33 4 38 5 66 7 77 0 88 4 102 0 104 2 120 3 21 7 25 0 33 4 38 5 66 7 77 0 88 4 102 0 104 2 120 3 7 8 10 4 12 0 16 0 24 0 32 0 31 8 42 4 37 5 50 0 7 8 10 4 12 0 16 0 24 0 32 0 31 8 42 4 37 5 50 0 7 8 10 4 12 0 16 0 24 0 32 0 31 8 42 4 37 5 50 0 7 8 10 4 12 0 16 0 24 0 32 0 31 8 42 4 37 5 50 0 21 7 25 0 33 4 38 5 66 7 77 0 88 4 102 0 104 2 120 3 f 21 7 25 0 33 4 38 5 66 7 77 0 88 4 102 0 104 2 120 3 7 8 10 4 12 0 16 0 24 0 32 0 31 8 42 4 37 5 50 0 143 5 133 5 59 0 59 0 59 0 59 0 59 9 66 4 101 6 114 5 128 7 145 8 148 5 137 5 57 4 57 4 57 4 57 4 60 4 66 9 102 1 115 0 129 2 146 3 149 0 139 0 63 4 63 4 63 4 63 4 65 4 71 9 107 1 120 0 134 2 151 3 154 0 143 0 107 1 120 0 134 2 151 3 154 0 143 0 222 So oon 60 70 100 110 125 150 150 150 70 70 70 70 110 125 150 150 150 150 70 70 70 80 110 125 150 150 150 175 70 70 80 80 110 125 150 175 175 175 70 70 70 80 110 125 150 150 150 175 70 70 80 80 110 125 150 175 175 175 8111 88811118811 8111 56 56 56 56 56 56 89 101 114 129 132 151 61 61 61 61 61 62 94 106 119 135 138 156 61 61 61 61 61 62 94 106 119 135 137 156 66 66 66 66 66 67 99 111 124 140 143 161 64 64 64 64 94 106 119 135 137 156 70 70 70 70 70 70 99 111 124 140 143 161 341 341
34. 8 a ij Bhp Watts Rem Bhp Watts Rem Bhp Watts Rem Bhp Watts Rem Bhp Watts 1 71 2 92 1 75 2 97 1 83 3 07 1 92 3 18 1 97 3 23 2 02 3 29 2 12 3 41 2 23 3 54 2 34 3 67 2 46 3 80 2 58 3 95 2 71 4 10 2 84 2 99 3 13 3 29 3 45 3 54 LEGEND NOTES Bhp Brake Horsepower Input to Fan 1 Boldface indicates field supplied drive is required Watts Input Watts to Motor 2 Maximum continuous bhp is 4 20 3 See page 23 for general fan performance notes Motor drive range 860 to 1080 rpm All other rpms require field pag 3 5 supplied drive 25 Table 17 Fan Performance 551B102 Vertical Discharge Units Standard Motor Belt Drive EXTERNAL STATIC PRESSURE in wg AIRFLOW CFM 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 OO P N gt 1 NNN S0060 2800000000002 AAA DAALAnL2222oooooooo x Q gt 400 0 0 0 2056000340504 NN 2 000005 1 p Oo S aaa en Q io Oo i gt G Io 2 o o Z S O O Q O n Q gt N co O gt P Q N 0 10 066 O NS O cO v OIO Q EXTERNAL STATIC PRESSURE in
35. 85 6 090 102 1085 1060 1035 1010 985 960 935 910 890 865 840 120 1080 1060 1035 1015 990 970 950 925 905 880 860 Approximate fan rpm shown Table 10 Fan Rpm at Motor Pulley Setting High Static Motor Drive MOTOR PULLEY TURNS OPEN bh 3 t 2 2 3 3 4 s s 6 1080 1025 1007 988 970 952 933 915 897 860 1080 1025 1007 988 970 952 93 915 897 878 860 1130 Approximate fan rpm shown Table 11 Evaporator Fan Motor Data Standard Motor UNIT UNIT MAXIMUM MAXIMUM MAXIMUM 551B PHASE CONTINUOUS BHP OPERATING WATTS UNIT VOLTAGE AMP DRAW 208 230 86 090 102 2 90 Three 3775 x 4400 1 LEGEND BHP Brake Horsepower Extensive motor and electrical testing on these units ensures that the full horsepower and watts range of the motors can be utilized with confidence Using your fan motors up to the ratings shown in this table will not result in nuisance tripping or premature motor failure Unit warranty will not be affected Table 12 Evaporator Fan Motor Data High Static Motors UNIT UNIT MAXIMUM MAXIMUM MAXIMUM 5551B PHASE CONTINUOUS BHP OPERATING WATTS UNIT VOLTAGE AMP DRAW 208 230 3775 40 55 8975 55 208 230 Three 4400 8 575 001 85 LEGEND BHP Brak
36. AN AND IN PLACE VERIFY THAT UNIT INSTALLATION ISLEVEL CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING AND ORIFICE AND CHECK THAT CHECK PULLEY ALIGNMENT AND BELT TENSION PER INSTALLATION INSTRUCTIONS CHECK TO ENSURE THAT ELECTRICAL WIRING IS NOT IN CONTACT WITH REFRIGERANT LINES OR L3 L1 L3 L3 L3 AT SERVICE PORT AT SERVICE PORT CONDENSER LIQUID LINE OUTLET TUBE F F F F CONDENSER LIQUID LINE OUTLET TUBE VERIFY THAT 3 PHASE SCROLL COMPRESSOR IS ROTATING IN THE CORRECT DIRECTION VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS ON PAGES 43 45 Printed in U S A CL 1 CATALOG NO 04 53551004 01 CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE
37. ANEL lt 221 4 DIVIDER 3 1 OUTSIDE N piat ALUMINUM FILTER HOOD DIVIDER BAROMETRIC RELIEF Fig 23 Outdoor Air Hood Construction EUER CLIP Fig 24 Filter Installation FOR OCCUPANCY CONTROL REPLACE JUMPER WITH FIELD SUPPLIED TIME CLOCK BLK ECONOMIZER MOTOR FIELD m D POSITION POT WHT IREMOTE 135 OFM Tha ECONOMISER IV d 225 mec gal BOARD Ti MIN 1 T POS FOR STD OPEN UNIT v FIELD INSTALLED Q m EL os 11 Quer sd NOT USED lt NTHALPY N YEL 10 2 a NOT USED lt 5 4 LA 8 FIELD ACCESSORY 2 RAT ENTHALPY SENSOR j BLU S FIELD SPLICE 7 EON M SS SS E OW CRURA REC a E BRN a L J 1 NOT USED X 1 GRY 5 lt ORG 12 LEGEND Potentiometer Defaults Settings NOTES DCV Demand Controlled Ventilation IAQ Indoor Air Quality LA Low Ambient Lockout Device OAT Outdoor Air Temperature POT Potentiometer RAT Return Air Temperature Power Exhaust Middle 1 620 ohm 1 watt 5 resistor should be removed only when using differential Minimum Pos Fully Closed enthalpy or dry bulb DCV Max Middle 2 separate fi
38. CONDENSER COIL Fig 44 Propping Up Top Panel TOP VIEW CONDENSER COIL INNER COIL SECTION CENTER BAFFLE OUTER COIL CLEAN SECTION RETURN END Fig 45 Separating Coil Sections C Condensate Drain Check and dean each year at start of cooling season win ter protect against freeze up D Filters Clean or replace at start of each heating and cooling season or more often if operating conditions require it Replacement filters must be same dimensions as original filters E Outdoor Air Inlet Screen Clean screen with steam or hot water and a mild detergent Do not use throwaway filters in place of screens LUBRICATION A Compressors Each compressor is charged with correct amount of oil from the factory B Fan Motor Bearings Fan motor bearings are permanently lubricated No further lubrication of condenser fan or evaporator fan motors is required CONDENSER FAN ADJUSTMENT FIG 46 1 Shut off unit power supply and install lockout tag 2 Remove condenser fan assembly grille motor motor cover and fan and loosen fan hub setscrews 3 Adjust fan height as shown in Fig 46 4 Tighten setscrews and replace condenser fan assembly UNIT VOLTAGE FAN HEIGHT A in 208 230 v 460 v and 575 v Fig 46 Condenser Fan Adjustment IV BELT PULLEY ADJUSTMENT Inspect once each season or sooner if conditions warrant ve
39. E TEMPERATURE 1 Cooling Charging Charts Fig 49 CIRCUIT NO 2 u 7 571 95 071 38055384 3N11 NOILONS u S 1V25Vd0 o E e N 1130 38055384 INIT NOILONS 60 F 16 0 INE TEMPERATURE 4 40 SUCTION LINE TEMPERATURE Standard 551B150 Unit SUCTION 1 30 20 50 F 0 40 TION LINE TEMPERATURE 30 e 10 4 10 16 SUCTION LINE TEMPERATURE C 1 6 Cooling Charging Charts Fig 50 44 E To Use Cooling Charging Charts Units the Perfect Humidity Dehumidification System Refer tothe charts Fig 51 53 to determine the proper leav ing condenser pressure and temperature EXAMPLE Fig 51 Circuit 1 Leaving Condenser Pressure 300 psig Leaving Condenser Temperature 117F NOTE When using the charging charts it is important that only the subcooling reheat dehumidification coil liquid line solenoid valve be energized The subcooling reheat dehumid ification coil liquid line solenoid valve MUST be energized to use the charging charts and the outdoor motor speed control ler jumpered to run the fan at full speed Vil REPLACEMENT PARTS A complete list of replacement parts may be obtained from any Bryant distributor upon request COOLING MODE CHARGING CHART
40. HYSTERESIS ANALOG CONTROL RANGE ppm ppm ppm 0 10V RATE cfm Person y An Any VII STEP 7 ADJUST EVAPORATOR FAN SPEED Adjust evaporator fan rpm to meet jobsite conditions For units with electric heat required minimum cfm is 2250 for 551B090 and 102 and 3000 for 551B120 and 150 See Table 8 for exceptions Table 8 Minimum Required Airflow Exceptions VOLTAGE kW P URATION CFM 208 230 3200 Horizontal Horizontal or Vertical Tables 9 and 10 show fan rpm at motor pulley settings for standard and high static motors Tables 11 and 12 show evaporator fan motor data See Tables 13 and 14 and Fig 36 for accessory and option static pressure drops Refer to Tables 15 28 to determine fan speed settings Fan motor pulleys are factory set for speed shown in Table 1 To change fan speeds 1 Shut off unit power supply and install lockout tag 2 Loosen belt by loosening fan motor mounting nuts SeeFig 37 and 38 3 Loosen movable pulley flange setscrew see Fig 39 4 Screw movable flange toward fixed flange to increase rpm or away from fixed flange to decrease rpm Increasing fan rpm increases load on motor Do not exceed maximum speed specified in Table 1 5 Set movable flange at nearest keyway of pulley hub and tighten setscrew See Table 1 for speed change for each full turn of pulley flange Toalign fan and motor pulleys 1 Loosen fan pulley setscrews 0 35 2 Slide fan pulley a
41. LIB aO 0 58 0 63 0 68 0 74 0 80 0 86 0 93 1 00 1 07 1 15 1 23 1 31 1 40 1 49 1 59 1 69 1 80 1 91 2 02 2 14 2 26 S Or gt G N O O P gt Q N O I O gt Q O O S O N NIN IS O p o oO G Q P N a PN EXTERNAL STATIC PRESSURE wg AIRFLOW CFM PO N N O O N N N O O O O Q1 gt Q O CO O DIN N DIS ISIS IS a to O gt l O NO QO O O 0 4 gt Q S O gt wi gt 9 P w o ROXO IO XO0RBRIEOO IQO 00 d0 LEGEND NOTES Bhp Brake Horsepower Input to Fan 1 Boldface indicates field supplied drive is required Watts Input Watts to Motor 2 Maximum continuous bhp is 3 70 3 See page 23 for general fan performance notes Motor drive range 860 to 1080 rpm All other rpms require field pag 3 supplied drive 35 Table 27 Fan Performance 551B120 Horizontal Discharge Units High Static Motor Belt Drive EXTERNAL STATIC PRESSURE in wg AIRFLOW CFM N i i d d d d d O O gt 20S COANWUNODDOBAW k k mb m m m k d k O O too I gt G N o
42. Motor 2 Maximum continuous bhp is 2 90 3 See page 23 for general fan performance notes Motor drive range 840 to 1085 rpm All other rpms require field pag 3 4 supplied drive 31 Table 23 Fan Performance 551B090 Horizontal Discharge Units High Static Motor Belt Drive EXTERNAL STATIC PRESSURE in wg AIRFLOW CFM aoo 8 oe e e e O O G O O O Q O to O gt Q io lo 22B2l220BROO02 uB5BR2naOO 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 Q gt p gt o N Q O gt O O gt O Q O gt 1 OO BOOOO0NO002060NdO 1204 uo gt o P Q c O amp GQ gt G O O O N 5 aaa oo sN EXTERNAL STATIC PRESSURE in wg Oe 8 Rpm Bhp Watts Rpm Watts Rem Bhp Watts Bhp Watts Rpm Bhp Watts 1 60 2 75 1 64 2 80 1 71 2 89 1 79 3 00 1 83 3 05 1 88 3 10 1 96 3 21 2 05 3 32 2 15 3 44 2 24 3 56 2 35 3 69 2 45 3 82 2 56 3 96 2 68 4 10 2 80 2 92 3 05 3 12 LEGEND NOTES 1 Boldface indicates field supplied drive is required MEAS Meter tokan 2 Maximum co
43. ONDENSER PSIG NOTE When using the charging charts it is important that only the subcooling reheat dehumidification coil liquid line solenoid valve be energized The subcool ing reheat dehumidification coil liquid line solenoid valve MUST be energized to use the charging charts and the outdoor motor speed controller jumpered to run the fan at full speed Fig 52 Cooling Charging Chart 581B102 and 120 With the Perfect Humidity Dehumidification System COOLING MODE CHARGING CHART 2 5 TON 60HZ CAPPLICABLE ONLY WHEN COIL IS IN SUBCOOLING MODE OUTDOOR FAN MUST BE OPERATING 150 140 130 CIRCUIT 1 ADD CHARGE IF ABOVE CURVE 120 CIRCUIT 2 110 100 LIQUID TEMPERATURE LEAVING CONDENSER DEG F REDUCE CHARGE IF BELOW CURVE 50 100 150 200 250 300 350 400 LIQUID PRESSURE LEAVING CONDENSER PSIG NOTE When using the charging charts it is important that only the subcooling reheat dehumidification coil liquid line solenoid valve be energized The subcool ing reheat dehumidification coil liquid line solenoid valve MUST be energized to use the charging charts and the outdoor motor speed controller jumpered to run the fan at full speed Fig 53 Cooling Charging Chart 581B150 With the Perfect Humidity Dehumidification System TROUBLESHOOTING I
44. OUTDOOR AIR OO ADJUSTMENT SCREWS DAMPER BLADE Fig 15 Damper Panel with Manual Outdoor Air Damper Installed 13 SCREW HOLES SS HOOD HOOD SCREEN LOCATION NEGATIVE PRESSURE in wg To remove the existing unit filter access panel raise the panel and swing the bottom outward The panel is now disengaged from the track and can be removed SeeFig 20 HOOD TOP SCREWS HIDDEN SCREWS SCREEN HOLDERS HOOD SIDES AND TOP ASSEMBLED Fig 16 Outdoor Air Hood Details 9 z III III e funi 1 o 9 Fig 17 Optional Manual Outdoor Air Damper with Hood Attached OUTDOOR AIRFLOW cfm x 100 Fig 18 Outdoor Air Damper Position Setting 2 The box with the economizer hood components is shipped in the compartment behind the economizer The EconoMi er IV controller is mounted on top of the EconoMi er IV in the position shown in Fig 19 To remove the component box from its shipping posi tion remove the screw holding the hood box bracket tothe top of the economizer Slide the hood box out of theunit SeeFig 21 IMPORTANT If the power exhaust accessory is to be installed on the unit the hood shipped with the unit will not be used and must be discarded Save the aluminum fi
45. R and TR1 5 Carefully adjust the minimum position potentiometer until the measured mixed air temperature matches the calculated value 6 Reconnect the supply air sensor to terminals T and T1 Remote control of the EconoMi er IV damper is desirable when requiring additional temporary ventilation If a field supplied remote potentiometer Honeywell part num ber S963B 1128 is wired tothe E conoMi er IV controller the minimum position of the damper can be controlled from a remote location To control the minimum damper position remotely remove the factory installed jumper on the P and P1 terminals on the EconoMi er IV controller Wire the field supplied poten tiometer to the P and P1 terminals on the EconoMi er IV controller See Fig 34 Damper Movement Damper movement from full open to full dosed or vice versa takes 21 minutes Thermostats The EconoMi er IV control works with conventional thermo stats that have a Y1 cool stage 1 Y2 cool stage 2 W1 heat stage 1 W2 heat stage 2 and G fan The EconoMi er IV control does not support space temperature sensors Connections are made at the thermostat terminal connection board located in the main control box Occupancy Control The factory default configuration for the IV con trol is occupied mode Occupied status is provided by the black jumper from terminal TR to terminal N When unoccu pied mode is desired install a field suppli
46. TB Terminal Block Field Control Wiring Fig 13 Typical Perfect Humidity Dehumidification System Humidistat Wiring 208 230 v Unit Shown ROOF TOP UNIT T STAT WIRES Hote ames See N S RED 24y LEGEND ak a LL LS PINK PINK _ FROM CB Circuit Breaker PERFECT HUMIDITY LCT Light Commercial Thermidistat Device SYSTEM LLSV LLSV Liquid Line Solenoid Valve LTLO Low Temperature Lockout PERFECT HUMIDITY SYSTEM Fig 14 Typical Rooftop Unit with Perfect Humidity Dehumidification System with Thermidistat Device 12 C Convenience Outlet An optional convenience outlet provides power for rooftop use For maintenance personnel safety the convenience out let power is off when the unit disconnect is off Adjacent unit outlets may be used for service tools An optional Hot Out let is available from the factory as a special order item D Manual Outdoor Air Damper The outdoor air hood and screen are attached to the basepan at the bottom of the unit for shipping Assembly 1 Determine quantity of ventilation required for build ing Record amount for use in Step 8 2 Remove filter access panel by raising panel and swinging panel outward Panel is now disengaged from track and can be removed No tools are required to remove the filter access panel Remove outdoor air opening panel Save panels and screws SeeF ig 15 3 Separate hood and screen from basepan by removing the screws and brackets securi
47. ard return air section to remove foreign material Flush condensate pan after completion Reinstall economizer or two position damper and filters Reconnect wiring Replace access panels god B Condenser Coils Inspect coils monthly Clean condenser coils annually and as required by location and outdoor air conditions Clean 2 row coils as follows 1 Turn off unit power and install lockout tag 2 Remove top panel screws on condenser end of unit 41 Remove condenser coil corner post See Fig 43 To hold top panel open place coil corner post between top panel and center post See Fig 44 Remove device holding coil sections together at return end of condenser coil Carefully separate the outer coil section 3 to 4 in from the inner coil section See Fig 45 Use a water hose or other suitable equipment to flush down between the 2 coil sections to remove dirt and debris Clean the outer surfaces with a stiff brush in the normal manner Secure the sections together Reposition the coil sec tions and remove the coil corner post from between the top panel and center post Install the coil corner post and coil center post and replace all screws TOP REMOVE CONDENSER CONTROL BOX PANEL SCREWS FAN CORNER POST 3 0 4 REMOVE SCREWS COIL CENTER POST CONDENSER REMOVE COIL COIL CORNER POST Fig 43 Cleaning Condenser Coil COIL CORNER CENTER BAFFLE TOP PANEL
48. conomi er IV is equipped with an ambient tempera ture lockout switch located in the outdoor airstream which is used to lock out the compressors below a 42 F ambient tem perature See Fig 19 G IV Control Modes Determine the EconoMi er IV control mode before set up of the control Some modes of operation may require different sensors Refer to Table The EconoMi er IV is supplied from the fac tory with a supply air temperature sensor and an outdoor air temperature sensor This allows for operation of the EconoMi er IV with outdoor air dry bulb changeover control Additional accessories can be added to allow for different types of changeover control and operation of the IV andunit 40 1 1 68 86 2 416 1 1 198 Table 6 IV Sensor Usage ECONOMISER IV WITH OUTDOOR AIR APPLICATION DRY BULB SENSOR Accessories Required None The outdoor air dry bulb sensor Outdoor Air Dry Bulb is factory installed Differential Dry Bulb CRTEMPSNO002A00 Single Enthalpy 57 078 57 078 Differential Enthalpy and CRENTDIFO004A00 CO for DCV Control using a Wall Mounted 332 5 2 Sensor for DCV Control 33ZCSENCO2t using a Duct Mounted and CRCBDIOXO005A0011T CO Sensor 332 2 CRENTDIF004A00 CRTEMPSNO02A00 accessories are used on many different base units As such these kits may contain parts t
49. continuous bhp is 5 25 3 See page 23 for general fan performance notes Motor drive range 830 to 1130 rpm All other rpms require field pag 3 supplied drive 29 Table 21 Fan Performance 551B150 Vertical Discharge Units Standard Motor Belt Drive EXTERNAL STATIC PRESSURE in wg AIRFLOW CFM GrP Ix eB CO IO IO TO O IO TO O O zt gt S O O gt O gt O tO G gt Q o O DNNN NO O N O O O gt O gt O gt 0 O O OO OTI O Ore TS G CO GO CO SIN S IS kak to N O O w GQ O 0 G O O O 010 0 0 00 gt o O gt O co P N gt gt Q N gt amp 5 amp 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 EXTERNAL STATIC PRESSURE wg AIRFLOW CFM A P P P cO O O O P G O O S O OOO O O gt gt gt gt gt gt gt C O PO O O N N O O S O O N OQ IONO O T ECOO
50. counter flashing and mastic in accordance with applicable codes Ducts passing through an unconditioned space must be insu lated 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 appli cable fire codes A minimum clearance to combustibles is not required around ductwork on vertical discharge units On horizontal dis charge units a minimum dearance of 1 is required for the first 12 in of ductwork Cabinet return air static pressure a negative condition should not exceed 0 30 in wg with IV or 0 45 wg without economizer REMOVABLE HORIZONTAL RETURN DUCT OPENING COVER REMOVABLE HORIZONTAL SUPPLY DUCT OPENING COVER Fig 1 Horizontal Conversion Panels Ill STEP 3 INSTALL CONDENSATE DRAIN LINE AND EXTERNAL TRAP Condensate drain connections are located at the bottom and end of the unit Unit discharge connections do not determine the use of drain connections either drain connection can be used in vertical or horizontal applications When using the standard end drain connection make sure the plug red in the alternate bottom connection is tight before installing the unit To use the bottom drain connection for a roof curb installa tion relocate the factory installed plug red from the bottom connection to the end connection See Fig 4 The piping for the condensate drain and exter
51. d and follow instructions on all WARNING CAU TION and INFORMATION labels attached to or shipped with unit 3 Make the following inspections a Inspect for shipping and handling damages such as broken lines loose parts or disconnected wires b Inspect for oil at all refrigerant tubing connec tions and on unit base Detecting oil generally indicates a refrigerant leak Leak test all refrig erant tubing connections using electronic leak detector halide torch or liquid soap solution c Inspect all field wiring and factory wiring con nections Be sure that connections are completed and tight d Inspect coil fins If damaged during shipping and handling carefully straighten fins with a fin comb 4 Verify the following a Make sure that condenser fan blades are correctly positioned in fan orifice Refer to Condenser Fan Adjustment section on page 42 for more details b Make sure that air filters arein place c Make sure that condensate drain trap is filled with water to ensure proper drainage d Make sure that all tools and miscellaneous loose parts have been removed e Make sure that the start up checklist has been performed and filled out NOTE Ensure wiring does not contac any refrigerant tubing START UP UNIT PREPARATION Make sure that unit has been installed in accordance with these installation instructions and applicable codes Il RETURN AIR FILTERS Make sure correct filters are installed in uni
52. ded Fig 5 Condensate Drain Piping Details POSITION ALL SEAL STRIPS IN PLACE BEFORE INSTALLING UNIT ON ROOF CURB AS 914 1371 NOTES 1 Place unit on curb as close as possible to the duct end 2 Dimension in is in millimeters 3 Hook rigging shackles through holes in base rail as shown in detail A Holes in base rails are centered around the unit center of gravity Use wooden top skid when rigging to prevent rigging straps from damaging unit 4 Unit weights do not include economizer See Table 1 for econo mizer weights 5 Weights include base unit without the Perfect Humidity dehumid ification system See Table 1 for additional unit operating weights with the Perfect Humidity dehumidification system A CAUTION AII panels must be in place when rigging CLOSE TO THIS END AS POSSIBLE OPERATING WEIGHT Ls EN 090 755 343 77 42 1967 41 5 1054 42 12 1070 102 895 406 77 42 1967 41 5 1054 50 12 1273 120 915 415 7742 1967 41 5 1054 50 12 1273 150 930 422 7742 1967 41 5 1054 50 12 1273 Fig 6 Rigging Details 31VSN3ONOO CLS 3 Nunl3M A ddns 3015 1H9IW M 2510 431734 2Iul3HOUVE t821 trei 91 11 S 07 247 01 fore 4 Y gu uIv 3015110 38 0 Seg WINOZIWOH NES 9NIN3d0 A ddns LL LLL rate IgOH 9NIN3d0 Va
53. e Horsepower Extensive motor and electrical testing on these units ensures that the full horsepower and watts range of the motors can be utilized with confidence Using your fan motors up to the ratings shown in this table will not result in nuisance tripping or premature motor failure Unit warranty will not be affected Table 13 Accessory FIOP EconoMi er IV Static Pressure wg CFM ee ee UE 2250 2500 2750 3000 3250 3500 3750 4000 4250 4500 4750 5000 5250 6250 Vertical EconoMiSerIV 0 06 0 075 0 09 0 115 0 13 0 15 0 17 0 195 022 0 25 0 285 0 325 0 36 Horizontal EconoMiSeriV 0 125 0 15 0 18 021 0 25 0275 034 0 388 LEGEND FIOP Factory Installed Option The static pressure must be added to external static pressure The sum and the evaporator entering air cfm should be used in conjunction with the Fan Performance tables to determine indoor blower rpm and watts Table 14 Accessory FIOP Electric Heaters Static Pressure in wg COMPONENT CFM 2200 2500 3000 3500 4000 4500 5000 5500 6000 2HeaterModules 0 03 0 05 0 07 009 012 014 016 019 021 LEGEND FIOP Factory Installed Option The static pressure must be added to external static pressure The sum and the evaporator entering air cfm should be used in conjunction with the Fan
54. ed timeclock func tion in place of the jumper between TR and N See Fig 25 When the timedock contacts are closed the EconoMi er IV control will be in occupied mode When the timedock con tacts are open removing the 24 v signal from terminal N the EconoMi er IV will bein unoccupied mode Demand Controlled Ventilation DCV When using the IV for demand controlled venti lation there are some equipment selection criteria which should be considered When selecting the heat capacity and cool capacity of the equipment the maximum ventilation rate must be evaluated for design conditions The maximum damper position must be calculated to provide the desired fresh air Typically the maximum ventilation rate will be about 5 to 1096 more than the typical cfm required per person using normal outside air design criteria A proportional anticipatory strategy should be taken with the following conditions a zone with a large area varied occupancy and equipment that cannot exceed the required ventilation rate at design conditions Exceeding the required ventilation rate means the equipment can condition air at a maximum ventilation rate that is greater than the required ventilation rate for maximum occupancy A proportional anticipatory strategy will cause the fresh air supplied to increase as the room CO level increases even though the CO set point has not been reached By the time the CO level reaches the set point
55. eld supplied 24 v transformer is used for the IAQ sensor power DCV Set Middle supply it cannot have the secondary of the transformer grounded Enthalpy C Setting 3 For field installed remote minimum position POT remove black wire jumper between P and P1 and set control minimum position POT to the minimum position Fig 25 IV Wiring 15 25001 2000 1500 1000 a e o 0 05 0 15 0 25 STATIC PRESSURE wg FLOW IN CUBIC FEET PER MINUTE cfm Fig 26 Barometric Relief Flow Capacity 301 25 20 STATIC PRESSURE in wg FLOW IN CUBIC FEET PER MINUTE cfm 0 13 0 20 0 22 0 25 0 30 0 35 0 40 0 45 0 50 Fig 27 Outdoor Air Damper Leakage 60007 5000 4000 3000 2000 1000 0 05 0 10 0 15 0 20 0 25 0 30 STATIC PRESSURE in wg FLOW IN CUBIC FEET PER MINUTE cfm Fig 28 Return Air Pressure Drop SUPPLY AIR TEMPERATURE SENSOR MOUNTING LOCATION SUPPLY AIR TEMPERATURE SENSOR gt Fig 29 Supply Air Sensor Location 0 35 Table 5 Supply Air Sensor Temperature Resistance Values 40 77 176 2 2 6 25 76 212 1 1 111266 89 o y oo 70 55 The temperature sensor looks like an eyelet terminal with wires running to it The sensor is located in the crimp end and is sealed from moisture Outdoor Air Lockout Sensor The E
56. equirements The maximum demand ventilation position is used for fully occu pied ventilation When demand ventilation control is not being used the min imum position potentiometer should be used to set the occu pied ventilation position The maximum demand ventilation position should be turned fully dockwise Adjust the minimum position potentiometer to allow the minimum amount of outdoor air as required by local codes to enter the building Make minimum position adjustments with at least 10 F temperature difference between the out door and return air temperatures To determine the minimum position setting perform the following procedure 1 Calculate the appropriate mixed air temperature using the following formula OA RA 100 Tp 1007 Outdoor Air Temperature OA z Percent of Outdoor Air Tg Return Air Temperature RA Percent of Return Air Tm Mixed Air Temperature As an example if local codes require 10 outdoor air during occupied conditions outdoor air temperature is 60 F and return air temperature is 75 F 60 x 10 75 x 90 73 5 F 2 Disconnect the supply air sensor from terminals T and T1 3 Ensure that the factory installed jumper is in place across terminals P and P1 If remote damper posi tioning is being used make sure that the terminals are wired according to Fig 25 and that the minimum position potentiometer is turned fully clockwise 4 Connect 24 vac across terminals T
57. er safety precautions that may apply Follow all safety codes Wear safety glasses and work gloves Use quenching doth for unbrazing operations Have fire extinguisher available for all brazing operations CAUTION Ensure voltage listed on unit data plate agrees with electrical supply provided for unit WARNING Before performing service or mainte nance operations on unit turn off main power switch to unit and install lockout tag Electrical shock could cause personal injury INSTALLATION Unit is shipped in the vertical configuration To convert to horizontal configuration remove side duct opening covers Using the same screws install covers on vertical duct open ings with the insulation side down Seals around duct openings must be tight SeeFig 1 installation start up and service instructions SINGLE PACKAGE ROOFTOP ELECTRIC COOLING UNITS 551B DuraPac Plus Series Sizes 090 150 71 gt to 121 Tons Cancels 11 551B 90 6 551B 90 7 10 15 05 I STEP 1 PROVIDE UNIT SUPPORT A Roof Curb Assemble and install accessory roof curb in accordance with instructions shipped with curb Install insulation cant strips roofing felt and counter flashing as shown Ductwork must be attached to curb If electric or control power is to be routed through the basepan attach the accessory thru the bottom service connections to the basepan in accordance with the accessory installation instructions Connections
58. es not rise to normal levels 1 Natethat the evaporator fan is probably also rotating in the wrong direction 2 Turn off power to the unit and install lockout tag 3 Reverse any two of the unit power leads 4 Turn on power tothe unit The suction and discharge pressure levels should now move totheir normal start up levels NOTE When the compressor is rotating in the wrong direc tion the unit makes an elevated level of noise and does not provide heating or cooling CAUTION Compressor damage will occur if rota tion is not immediately corrected IX COOLING Tostart unit turn on main power supply Set system selector switch at COOL position and fan switch at AUTO position Adjust thermostat to a setting below room temperature Compressor starts on closure of contactor Check unit charge Refer to Refrigerant Charge section on page 42 Reset thermostat at a position above room temperature Compressor will shut off To Shut Off Unit Set system selector switch at OFF position Resetting ther mostat at a position above room temperature shuts unit off temporarily until space temperature exceeds thermostat set ting Units are equipped with CydeLOC protection device Unit shuts down on any safety trip and remains off an indicator light on the thermostat comes on Check reason for safety trip Compressor restart is accomplished by manual reset at the thermostat by turning the selector switch to OFF position and t
59. ess a lower gross sensible capacity 2096 less and a greatly increased latent capacity up to 4096 more Hot Gas Reheat M ode When the humidity levels in the space require humidity con trol a hot gas solenoid valve specific to hot gas reheat mode only will open to bypass a portion of hot gas refrigerant around the condenser coil see Fig 42 This hot gas will mix with liquid refrigerant leaving the con denser coil and flow to the subcooling reheat dehumidifica tion coil Now the conditioned air coming off the evaporator GAS SOLENOID VALVE OUTDOOR AIR SUBCOOLING RE HEAT DEHUMIDIFICATION COIL 2 CCH gt ZuwGse HEATER COMPRESSOR FIXED RESTRICTOR CUTROL DEVICE BULB LPS LOW PRESSURE SWITCH EQUALIZER LINE CLOSED LLSV LIQUID LINE SOLENOID VALVE Fig 41 Perfect Humidity System Subcooling Mode Operation will be cooled and dehumidified but will be warmed to neu tral conditions 72 F to 75 F by the subcooling reheat dehu midification coil NOTE The 551B090 150 rooftop units can operate one cir cuit in subcooling mode and one circuit in hot gas reheat mode or both circuits in hot gas reheat mode or both in nor mal design cooling mode The net effect of the rooftop when in hot gas reheat mode is to provide nearly all latent capacity removal from the space when sensible loads diminish when outdoor temperature conditions a
60. hat will not be needed for installation 33ZCSENCO2 is an accessory CO sensor B8ZCASPCO is an accessory aspirator box required for duct mounted applications TTCRCBDIOXO005A00 is an accessory that contains both 33ZCSENCO2 and 33ZCASPCO2 accessories 16 Outdoor Dry Bulb Changeover The standard controller is shipped from the factory configured for outdoor dry bulb changeover control The outdoor air and supply air temperature sensors are induded as standard For this control mode the outdoor temperature is compared to an adjustable set point selected on the control If the outdoor air temperature is above the set point the EconoMi er IV will adjust the outdoor air dampers to minimum position If the outdoor air temperature is below the set point the position of the outdoor air dampers will be controlled to provide free cool ing using outdoor air When in this mode the LED next to the free cooling set point potentiometer will be on The changeover temperature set point is controlled by the free cooling set point potentiometer located on the control See Fig 30 The scale on the potentiometer is A B C and D SeeFig 31 for the corre sponding temperature changeover values Differential Dry Bulb Control For differential dry bulb control the standard outdoor dry bulb sensor is used in conjunction with an additional acces sory dry bulb sensor part number CRTEMPSNO02A00 The accessory sensor must be mounted in the ret
61. hen ON position X HEATING IF ACCESSORY HEATER IS INSTALLED To start unit turn on main power suppl y Set thermostat at HEAT position and a setting above room temperature and set fan at AUTO position First stage of thermostat energizes the first stage electric heater elements second stage energizes second stage electric heater elements Check heating effects at air supply grille s If accessory electric heaters do not energize reset limit switch located on evaporator fan scroll by pressing button located between terminals on the switch To Shut Off Unit Set system selector switch at OFF position Resetting heating selector lever below room temperature temporarily shuts unit off until space temperature falls below thermostat setting XI SAFETY RELIEF A soft solder joint in the suction line at the loss of charge low pressure switch fitting provides pressure relief under abnormal temperature and pressure conditions XII VENTILATION CONTINUOUS FAN Set fan and system selector switches at ON and OFF posi tions respectively Evaporator fan operates continuously to provide constant air circulation XIII OPERATING SEQUENCE A Cooling Units Without EconoMi er IV When the thermostat calls for cooling terminals G and Y1 are energized The indoor evaporator fan contactor IFC outdoor condenser fan contactor OFC and compressor contactor no 1 C1 are energized and the evaporator fan motor compressor no 1
62. ification Coil Energized Table 32 Perfect Humidity Dehumidification Hot Gas Reheat Mode Service Analysis Reheat Mode Will Not Energize No power to control transformer from Check power source and evaporator fan relay Ensure all wire evaporator fan motor connections are tight No power from control transformer to hot 1 Fuse open check fuse Ensure continuity of wiring gas line solenoid valve 2 Low pressure switch open Cycle unit off and allow low pressure switch to reset Replace switch if it will not close 3 Transformer bad check transformer Hot gas line solenoid valve will not operate 1 Solenoid coil defective replace 2 Solenoid valve stuck closed replace Low refrigerant charge or frosted evapora 1 Check charge amount Charge per Fig 51 53 tor coil 2 Evaporator coil frosted check and replace low pressure switch if necessary Loss of Compressor Superheat Thermostatic expansion valve TXV 1 Check TXV bulb mounting and secure tightly to suction line Conditions with Subcooling Reheat 2 Replace TXV if stuck open or closed Dehumidification Coil Energized Excessive Superheat Liquid line solenoid valve will not operate Valve is stuck replace valve Hot gas line solenoid valve will not close Valve is stuck replace valve 47 ECONOMISER IV TROUBLESHOOTING See Table 33 for EconoMi er IV logic A functional view of the E conoMi er IV is shown in Fig 54 Typical settings sensor ranges
63. ig 24 8 Caulk the ends of the joint between the unit top panel and the hood top See Fig 22 9 Replace the filter access panel 10 Install all EconoMi er I V accessories EconoMi er IV wiring is shown in Fig 25 Barometric flow capadty is shown in Fig 26 Outdoor air leakage is shown in Fig 27 Return air pressure drop is shown in Fig 28 F EconoMi er IV Standard Sensors Outdoor Air Temperature OAT Sensor The outdoor air temperature sensor 57 074 is a 10 to 20 mA device used to measure the outdoor air temperature The outdoor air temperature is used to determine when the EconoMi er IV can be used for free cooling The sensor is factory installed on the EconoMi er IV the outdoor air stream See Fig 19 The operating range of temperature measurement is 40 to 100 F Supply Air Temperature SAT Sensor The supply air temperature sensor is a 3 K thermistor located at the inlet of the indoor fan See Fig 29 This sensor is factory installed The operating range of temperature measurement is 0 to 158 F See Table 5 for sensor tempera ture resistance values E HOOD BOX BRACKET Fig 21 Hood Box Removal SIDE PANEL b E TOP 4 gt SIDE PANEL INDOOR INDOOR COIL COIL ACCESS N ACCESS PANEL 5 PANEL Fig 22 Indoor Coil Access Panel Relocation 14 LEFT HOOD SIDE 24 9 16 anas ZOK CLEANABLE INDOOR COIL ACCESS P
64. l Electrical Code ANSI American National Standards I nstitute NFPA National Fire Protection Association 70 latest year and local electrical codes Failure to follow this warning could result in the installer being liable for personal injury of others A Field Power Supply All units except 208 230 v units are factory wired for the voltage shown on the unit nameplate If the 208 230 v unit is to be connected to a 208 v power supply the transformer must be rewired by disconnecting the black wire from the 230 v terminal wire on the transformer and connecting it to the 200 v red terminal of the transformer The end of the orange wire must then be insulated Refer to unit label diagram for additional information Pigtails are provided for field wire connections U se factory supplied splices or UL Underwriters Laboratories approved copper al uminum connector TO COMPS FIELD POWER SUPPLY pl DISCONNECT PERNEC 551B090 120 208 230 3 60 551B090 150 460 3 60 TO COMPS BLU Tg FIELD POWER SUPPLY aol ul LARE DISCONNECT 551B090 150 575 3 60 When installing units provide disconnect per the NEC All field wiring must comply with the NEC and local require ments In Canada electrical connections must be made in accordance with CSA Canadian Standards Association C22 1 Canadian Electrical Code Part One Install field wiring as follows 1 Install conduit thr
65. ld drive fully closed 6 Turn the DCV and Exhaust potentiometers CCW until the Exhaust LED turns on The exhaust con tacts will close 30 to 120 seconds after the Exhaust LED turns on 7 Return EconoMi er IV settings and wiring to normal after completing troubleshooting E DCV Minimum and Maximum Position To check the DCV minimum and maximum position 1 Make sure EconoMi er IV preparation procedure has been performed 2 Connect a 9 v battery to AQ positive node and AQ1 negative node The DCV LED should turn on The actuator should drive to between 90 and 95 open 3 Turn the DCV Maximum Position potentiometer to midpoint The actuator should drive to between 20 and 8096 open 4 Turn the DCV Maximum Position potentiometer to fully CCW The actuator should drive fully dosed 5 Turn the Minimum Position potentiometer to mid point The actuator should drive to between 20 and 8096 open 6 Turn the Minimum Position Potentiometer fully CW The actuator should drive fully open 7 Remove the jumper from TR and N The actuator should drive fully dosed 8 Return EconoMi er IV settings and wiring to normal after completing troubleshooting F Supply Air Input To check supply air input 1 Make sure EconoMi er IV preparation procedure has been performed 2 Set the Enthalpy potentiometer to A The Free Cool LED turns on The actuator should drive to between 20 and 80 open 3 Remove the 5 6 kilo ohm resistor and jumper t
66. long fan shaft 3 Make angular alignment by loosening motor from mounting plate To adjust belt tension 1 Loosen fan motor mounting nuts 2 Size090 Slide motor mounting plate away from fan scroll for proper belt tension 1 2 in deflection with 8 to 10 Ib of force and tighten mounting nuts see Fig 37 Sizes 102 150 Slide motor mounting plate down ward to tighten belt tension Secure motor mounting plate nuts See Fig 38 Use 1 deflection with 10 Ib of force 3 Adjust bolt and nut on mounting plate to secure motor in fixed position MOTOR MOUNTING hg PLATE NUTS e Fig 37 Typical Belt Drive Motor Mounting for Size 090 0 3 0 25 0 2 0 15 DELTA P IN WG 0 1 7 5ton 0 05 3 8 5 10 amp 12 5 ton T 0 1000 2000 3000 CFM T 4000 5000 6000 Fig 36 Perfect Humidity Dehumidification System Static Pressure Drop in wg 21 aN STRAIGHTEDGE OR STRING MOVABLE MUST BE PARALLEL FLANGE WITH BELT MOTOR MOUNTING MOTOR AND FAN PLATE NUTS SHAFTS MUST BE HIDDEN PARALLEL SETSCREWS FIXED FLANGE SINGLE GROOVE Fig 38 Typical Belt Drive Motor Mounting for Sizes 102 150 Fig 39 Indoor Fan Pulley Adjustment Table 9 Fan Rpm at Motor Pulley Setting Standard Motor Drive UNIT MOTOR PULLEY TURNS OPEN 551B o v 1 t 2 25 3 4 4 5
67. lter for use in the power exhaust hood assembly 3 The indoor coil access panel will be used as the top of the hood Remove the screws along the sides and bot tom of the indoor coil access panel See Fig 22 4 Swing out indoor coil access panel and insert the hood sides under the panel hood top Use the screws provided to attach the hood sides to the hood top Use screws provided to attach the hood sides to the unit See Fig 23 5 Remove the shipping tape holding the economizer barometric relief damper in place 6 Insert the hood divider between the hood sides See Fig 23 and 24 Secure hood divider with 2 screws on each hood side The hood divider is also used as the bottom filter rack for the aluminum filter 7 Open the filter clips which are located underneath the hood top Insert the aluminum filter into the bot tom filter rack hood divider Push the filter into ECONOMISER IV CONTROLLER WIRING HARNESS OUTSIDE AIR TEMPERATURE SENSOR LOW AMBIENT SENSOR ACTUATOR Fig 19 EconoMi er IV Component Locations FILTER ACCESS PANEL INDOOR COIL ACCESS PANEL Fig 20 Typical Access Panel Locations position past the open filter clips Close the filter dips tolock the filter into place SeeF
68. mperature is high add refrigerant If suction temperature is low carefully recover some of the charge Recheck the suction pressure as charge is adjusted EXAMPLE Fig 47 Circuit 1 Outdoor Temperature 85 F Suction Pressure 70 psig Suction Temperature should be 46 F Suction Temperature may vary 5 F 42 CIRCUIT NO 2 CIRCUIT NO 1 u e N G V2SVd0112D 38165389 3417 NOILONS in 8 575954071 34055384 11 NOIIOnS 60 SUCTION LINE TEMPERATURE F 40 0 30 z a 5 8 40 10 60 30 SUCTION LINE TEMPERATURE 1 21 16 10 SUCTION LINE TEMPERATURE C 4 1 4 Standard 5518090 Unit 3 Cooling Charging Charts Fig 47 STV0SVdO0113 38055384 INIT NOIlOnS 60 F o 40 SUCTION LINE TEMPERATURE 30 C 1 4 10 16 SUCTION LINE TEMPERATURE Standard 551B102 Unit 6 5 Cooling Charging Charts Fig 48 43 CIRCUIT NO 1 571 95 0 amp 1V95VdO 130 39055 113 38055 o aud 3417 NOILONS m N NOILINS 60 F 16 0 40 SUCTION LINE TEMPERATURE 30 0 60 40 gt ul E uj z 3 z S 8 30 eo 4 10 SUCTION LINE TEMPERATURE Standard 551B120 Unit 1 4 10 16 C SUCTION LIN
69. n is indicated on the unit nameplate draw ing Alsorefer to Fig 51 53 To charge systems using the Perfect Humidity dehumidification system fully evacuate recover and recharge the system to the nameplate specified charge level To check or adjust refrigerant charge on systems using the Perfect Humidity Dehumidification system charge per Fig 51 53 NOTE When using the charging charts it is important that only the subcooling reheat dehumidification coil liquid line solenoid valve be energized The subcooling reheat dehumid ification coil liquid line solenoid valve MUST be energized to use the charging charts and the outdoor motor speed control ler jumpered to run the fan at full speed The charts reference a liquid pressure psig and tempera ture at a point between the condenser coil and the subcooling reheat dehumidification coil A tap is provided on the unit to measure liquid pressure entering the subcooling reheat dehumidification coil IMPORTANT The subcooling mode charging charts Fig 51 53 are to be used ONLY with units having the optional Perfect Humidity dehumidification system DO NOT use standard charts Fig 47 50 for units with Perfect Humid ity option and DO NOT use Fig 51 53 for standard units D To Use Cooling Charging Charts Standard Units Take the outdoor ambient temperature and read the suction pressure gage Refer to appropriate chart to determine what the suction temperature should be If suction te
70. nal trap can be completed after the unit is place The center drain plug looks like star connection however it can be removed with a 1 gt in socket drive extension All units must have an external trap for condensate drain age Install a trap at least 4 in 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 in per 10 ft of run Do not use a pipe size smaller than the unit con nection 3 4 in See Fig 5 IV STEP 4 RIG AND PLACE UNIT Inspect unit for transportation damage File any daim with transportation agency 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 and Fig 6 for additional information Operating weight is shown in Table 1andFig 6 Lifting holes are provided in base rails as shown in Fig 6 and 7 Refer torigging instructions on unit A Positioning Maintain dearance around and above unit to provide proper airflow and service access SeeFig 7 Position unit on roof curb sothat the following dearances are maintained 14 in clearance between the roof curb and the base rail inside the front and rear 0 0 in dearance between the roof curb and the base rail inside on the duct end of the unit This will result in the distance between the roof curb and the base rail in
71. ng them Save all screws and discard brackets Replace outdoor air opening panel 5 Place hood on front of outdoor air opening panel See Fig 16 for hood details Secure top of hood with the 6 screws removed in Step 3 SeeFig 17 6 Remove and save 8 screws 4 on each side from sides of the manual outdoor air damper 7 Align screw holes on hood with screw holes on side of manual outdoor air damper See Fig 16 and 17 Secure hood with 8 screws from Step 6 8 Adjust minimum position setting of the damper blade by adjusting the manual outdoor air adjustment screws on the front of the damper blade See Fig 15 Slide blade vertically until it is in the appropriate position determined by Fig 18 Tighten screws 9 Remove and save screws currently on sides of hood nsert screen Secure screen to hood using the screws SeeFig 17 10 Replace filter access panel Ensure filter access panel slides along the tracks and is securely engaged E Optional EconoMi er IV See Fig 19 for component locations NOTE These instructions are for installing the optional EconoMi er IV Refer to the accessory EconoMi er IV installa tion instructions when field installing an EconoMi er IV accessory FILTER ACCESS PANEL OUTDOOR AIR OPENING PANEL SCREWS SIDE MANUAL 5
72. ngtt between min Modulatingtt between DCV LED On Free Cooling LED Off off On position and DCV maximum closed and DCV maximum Low High On Off Modulating Modulatingt tt For singe enthalpy control the module compares outdoor enthalpy A PON and a im o the set point rapt N ied nal eer nee soring DCV and supply air sensor vac Occupied no power Unoccupied 1 8 s Modulation ie based DR signal signals between closed and either maximum position DCV or fully ttModulation is based on the DCV signal open supply air signal 2 10 VDC ACTUATOR 2 84 Volts Temperature F eee freee 50 60 70 80 901 Fig 54 EconoMi er IV Functional View 49 Access panels 74 Barometric flow capacity 16 Charging chart refrigerant 43 45 Clearance 2 5 CO sensor Configuration 20 Settings 18 20 Compressor Lubrication 42 Mounting 38 Rotation 38 Condensate drain Cleaning 42 Location 2 4 Condenser coil 6 Cleaning 41 Condenser fan 6 Adjustment 42 Control circuit Wiring 11 Wiring raceway 11 Convenience outlet 13 Demand ventilation control 19 Dehumidification 20 Dimensions 3 5 Ductwork 1 EconoMi er IV 13 20 48 49 Adjustment 42 Components 14 Damper movement 19 Wiring 15 Electrical connections 7 Electrical data 8 10 Electric heaters 10 Enthalpy changeover set poin
73. nsor enters the Edit mode 2 Press Modetwice The STDSET Menu will appear 3 Use the Up Down button to toggle to the NONSTD menu and press Enter 4 Use the Up Down button to toggle through each of the nine variables starting with Altitude until the desired setting is reached 5 Press Mode to move through the variables 6 Press Enter to lock in the selection then press Mode to continue to the next variable Dehumidification of Fresh Air with DCV Control Information from ASHRAE indicates that the largest humid ity load on any zone is the fresh air introduced For some applications an energy recovery unit is added to reduce the moisture content of the fresh air being brought into the building when the enthalpy is high In most cases the nor mal heating and cooling processes are more than adequateto remove the humidity loads for most commercial applications If normal rooftop heating and cooling operation is not ade quate for the outdoor humidity level an energy recovery unit and or a dehumidification option should be considered Table 7 CO Sensor Standard Settings SETTING EQUIPMENT OUTPUT eee Interface w Standard Building Control System Proportiona Exponential 7 Exponential NC Health amp Safety Proportional Parking Air Intakes Loading Docks Proportional LEGEND ppm Parts Per Million Economizer EB Exponential VENTILATION OPTIONAL RELAY RELAY SETPOINT
74. ntactor no 1 HCl are energized On units equipped for 2 stages of heat when additional heat is needed HC2 is energized through W2 The economizer damper moves to the minimum position When the thermo stat is satisfied the damper moves to the fully dosed position E Units With Perfect Humidity Dehumidification System Normal Design Cooling Operation When the rooftop operates under the normal sequence of operation the compressors will cyde to maintain indoor con ditions See Fig 40 The Perfect Humidity dehumidification system indudes a factory installed Motormaster low ambient control to keep the head and suction pressure high allowing normal design cooling mode operation down to 0 F 39 CONDENSER COIL TM p HGSV HOT GAS OUTDOOR AIR SUBCOOLING RE HEAT DEHUMIDIFICATION COIL SUCTION CCH uf ACRANKCASE HEATER EVAPORATOR ua COMPRESSOR FIXED RESTRICTOR C ACUTROL DEVICE 2 4 BULB lt LPS LOW PRESSURE SWITCH 4 252 2 lt gt THERMOSTATIC EXPANSION OPEN VALVE CXV LIQUID LINE SOLENOID VALVE EQUALIZER L INE Fig 40 Perfect Humidity System Normal Design Cooling Operation Subcooling M ode When subcooling mode is initiated this will energize dose the liquid line solenoid valve LLSV forcing the hot liquid refrigerant to enter into the subcooling coil see Fig 41 As the hot liquid refrigerant passes thr
75. ntinuous bhp is 4 20 3 See page 23 for general fan performance notes Motor drive range 860 to 1080 rpm All other roms require field pos 3 supplied drive 32 Table 24 Fan Performance 551B102 Horizontal Discharge Units Standard Motor Belt Drive EXTERNAL STATIC PRESSURE in wg AIRFLOW CFM 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 N l S Q gt p P O 5 amp 4 m n OO m m md md d md d d d md md ad O O O O OOO gt O E 0 O P N N O O O O O P 0 N N N OIN d d d O O N to P Q N N Z G gt Q O Q O N 0 G EXTERNAL STATIC PRESSURE in wg eM IO ae j 20 51 crt Rem Bnp watts Rpm Bhp watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts 1 09 1 25 1 41 1 59 1 76 1 14 1 31 1 48 1 65 1 83 1 20 1 37 1 54 1 72 1 90 1 26 1 43 1 61 1 79 1 98 1 32 1 50 1 68 1 87 2 06 1 39 1 57 1 76 1 9
76. nto low voltage wiring as shown in Fig 13 install Thermidistat device 3 A field supplied relay must be installed between the Thermidistat device and the Perfect Humidity cuit recommended relay HN612K K 324 Fig 14 The relay coil is connected between the DEHUM output and C common of the unit The relay controls the Perfect Humidity solenoid valve and must be wired between the Perfect Humidity fuse and the low pressure switch Refer to the installation instructions included with the Bryant Light Commercial Thermi distat device for more information 1 Route Thermidistat cable through hole provided in unit corner post 2 Feed the wires through the raceway built into the cor ner post to the 24 v barrier located on the left side of the control box See Fig 10 The raceway provides the UL required dearance between high and low voltage wiring RELATIVE HUMIDITY Fig 11 Accessory Field Installed Humidistat 4 pk HR1 sci D LEGEND CB Circuit Breaker TRAN Transformer CR Cooling Relay 5 DHR Dehumidify Relay 1 4 Field Splice DSV Discharge Solenoid Valve HR Heater Relay Terminal Unmarked HU Humidistat e Splice LPS Low Pressure Switch LSV Liquid Solenoid Valve Factory Wiring LTLO Low Temperature Lockout hor
77. o T1 The actuator should drive fully open 4 Remove the jumper across T and T1 The actuator 4 Set minimum position DCV set point and exhaust should drive fully dosed potentiometers to previous settings 5 Return EconoMi er IV settings and wiring to normal 5 Remove 620 ohm resistor from terminals Sg and after completing troubleshooting 6 Remove 1 2 kilo ohm checkout resistor from termi G IV Troubleshooting Completion nals So and If used reconnect sensor from termi This procedure is used to return the EconoMi er IV to opera nals So and tion No troubleshooting or testing is done by performing the 7 Remove jumper from TR to N following procedure 8 Remove jumper from TR to 1 1 Disconnect power at TR and 1 9 Remove 5 6 kilo ohm resistor from T and T1 Recon 2 Set enthalpy potentiometer to previous setting nect wires at T and T1 3 Set DCV maximum position potentiometer to previ 10 Remove jumper from P to P1 Reconnect device at P OUS setting and P1 11 Apply power 24 vac to terminals and TR1 Table 33 IV Input Output Logic INPUTS OUTPUTS pisc N Terminalt sntilation Occupied Below set MM P position DCV LED Off Fee Cooling LED Off Low i Modulating between min Modulating between Free Cooling LED On ot or pee and full open closed and full open Above set High On Modulati
78. ooling and dehumidification will be off F Units With Power Exhaust When the outdoor air damper is modulated open the two end switches located in the actuator are tripped The factory settings are switch no 1 will close at 3096 outdoor air switch no 2 will dose at 7096 outdoor air Both switches are field adjustable As the outdoor air damper opens switch no 1 doses energizing a double pole relay that starts fan no 1 As the outdoor air damper continues to open switch no 2 will dose energizing a double pole relay that starts fan no 2 When the outdoor air damper doses to a point below the fan start points 30 fan no 1 70 fan no 2 the respective fan will be deenergized SERVICE N CAUTION When servicing unit shut off all elec trical power to unit to avoid shock hazard or injury from rotating parts I CLEANING Inspect unit interior at the beginning of each heating and cooling season or as operating conditions require A Evaporator Coil 1 Turn unit power off and install lockout tag Remove evaporator coil access panel 2 If EconoMi er IV or accessory two position damper is installed remove economizer or two position damper by disconnecting EconoMi er IV plug and removing mounting screws 3 Slide filters out of unit 4 Clean coil using a commercial coil cleaner or dish washer detergent in a pressurized spray canister Wash both sides of coil and flush with clean water For best results back flush tow
79. ooo io 20 I gt 0 Io 2 to 0 0 Q gt G N co P gt Q N 0 10 S O O OO Q EXTERNAL STATIC PRESSURE in wg ew ceo iur um ee _ ee 6 O Rem Bnp wats Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp 1 06 1 19 1 38 1 46 1 60 1 12 1 26 1 40 1 54 1 68 1 19 1 34 1 48 1 62 1 77 1 26 1 41 1 56 1 71 1 86 1 34 1 49 1 64 1 80 1 95 1 42 1 57 1 73 1 89 2 05 1 50 1 66 1 82 1 98 2 15 1 58 1 75 1 92 2 08 2 25 1 67 1 84 2 01 2 36 1 76 1 94 2 12 2 47 1 86 2 04 2 22 2 58 1 96 2 14 2 33 2 70 2 06 2 25 2 44 2 83 2 17 2 37 2 56 2 95 2 28 2 48 2 68 3 09 2 40 2 61 2 81 3 22 2 52 2 73 2 94 3 36 2 65 2 86 3 08 3 51 2 78 3 00 3 22 3 66 LEGEND NOTES Bhp Brake Horsepower Input to Fan 1 Boldface indicates field supplied drive is required Watts Input Watts to Motor 2 Maximum continuous bhp is 4 20 3 See page 23 for general fan performance notes Motor drive range 860 to 1080 rpm All other rpms require field pag 3 4 supplied drive 27 Table 19 Fan Performance 551B120 Vertical Discharge Units Standard Motor Belt Drive EXTERNAL STATIC PRESSURE in wg AIRFLOW CFM md d d ot OOO gt OO 0 0 36000 NN mb k k k k k k O
80. ough side panel openings For units without electric heat install conduit between discon nect and control box 2 Install power lines to terminal connections as shown in Fig 8 3 For units with electric heat refer to Accessory nstal lation Instructions During operation voltage to compressor terminals must be within range indicated on unit nameplate see Table 2 On 3 phase units voltages between phases must be balanced within 296 and the current within 1096 Use the formula shown in Table 2 Note 2 on page 10 to determine the per centage of voltage imbalance Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components Such operati on would invalidate any applicable Bryant warranty See Table 3 for electric heater and single point box usage TO COMP 1 FIELD POWER SUPPLY DISCONNECT _ PERNEC 5518150 208 230 3 60 LEGEND Contactor Compressor Indoor Evaporator Fan Contactor National Electrical Code Outdoor Condenser Fan Contactor Terminal Block Terminal Block Connection Field Wiring Factory Wiring Splice Connection Factory Supplied COMP S IFC NEC OFC TB Fig 8 Power Wiring Connections Table 2 Electrical Data VOLTAGE ELECTRIC HEATER POWER SUPPLY DISCONNECT comp 1 comp No 2 NO SIZET NOMINAL OFM OFM IFM V PH Hz QTY FLA FLA or RLA LRA 242
81. ough the subcooling reheat dehumidification coil it is exposed to the cold supply airflow coming through the evaporator coil The liquid is fur ther subcooled to a temperature approaching the evaporator leaving air temperature The liquid then enters a thermo static expansion valve TXV where the liquid drops to a lower pressure The TXV does not have a pressure drop great enough to change the liquid to a 2 phase fluid so the liquid then enters the Acutrol device at the evaporator coil The liquid enters the evaporator coil at a temperature lower than in standard cooling operation This lower temperature increases the latent capacity of the rooftop unit Therefriger ant passes through the evaporator and is turned into a vapor The air passing over the evaporator coil will become colder than during normal operation However as this same air passes over the subcooling coil it will be slightly warmed partially reheating the air Subcooling mode operates only when the outside air temper ature is warmer than 40 F A factory installed temperature switch located in the condenser section will lock out subcool ing mode when the outside temperature is cooler than 40 F The scroll compressors are equipped with crankcase heaters to provide protection for the compressors due to the addi tional refrigerant charge required by the subcooling reheat coil When in subcooling mode there is a slight decrease in sys tem total gross capacity 5 l
82. pan an accessory thru the bottom connection kit is required This is available through the local Bryant distributor This kit is required to ensure a reliable water tight connection 2 If unit is mounted on roof curb and accessory thru the bottom service connections are used route wire through connections 3 Pass control wires through the hole provided on unit see connection D in Connection Sizes table in Fig 7 4 Feed wire through the raceway built into the corner post to the 24 v barrier located on the left side of the control box See Fig 9 The raceway provides the COOL STAGE 1 i FAN G r HEAT STAGE 1 WWi 4 4 WIRE COOL STAGE 2 YN2 r La 24 VAC HOT Here B BOARD 24 VAC COM ao N A OUTDOOR AIR 81 SENSOR s THERMOSTAT DIPSWITCH SETTINGS ON F F m A B C D LEGEND Field Wiring NOTE Underlined letter indicates active thermostat output when configured for A C operation Fig 9 Low Voltage Connections UL required dearance between the high voltage and low voltage wiring 5 Connect thermostat wires to screw terminals of low voltage connector see Fig 9 NOTE If thru the bottom power connections are used refer to the accessory installation instructions for information on power wiring Refer to Fig 7 for drilling holes in basepan C Heat Anticipator Settings For units with electric heat set heat anticipator settings as shown in Table 4 VI STEP 6
83. pers will come back open to the minimum open posi tion oncethe supply air temperature rises to 48 F If optional power exhaust is installed as the outdoor air damper opens and doses the power exhaust fans will be energized and deenergized If field installed accessory CO sensors are connected to the EconoMi er control a demand controlled ventilation strategy will begin to operate As the CO level in the zone increases above the CO set point the minimum position of the damper will be increased proportionally As the CO level decreases because of the increase in fresh air the outdoor air damper will be proportionally dosed Damper position will follow the higher demand condition from DCV mode or free cooling mode Damper movement from full closed to full open or vice versa will take between 11 5 and 21 minutes If free cooling can be used as determined from the appropri ate changeover command switch dry bulb enthalpy curve differential dry bulb or differential enthalpy a call for cool ing Y 1 doses at the thermostat will cause the control to modulate the dampers open to maintain the supply air tem perature set point at 50 to 55 F As the supply air temperature drops below the set point range of 50 to 55 F the control will modulate the outdoor air dampers dosed to maintain the proper supply air temperature D Heating Units with EconoMi er IV Upon a call for heating through terminal W1 IFC and heater co
84. re moderate When in hot gas reheat mode the unit will operate to provide mostly latent capacity and extremely low sensible heat ratio capability Similar to the subcooling mode of operation hot gas reheat mode operates only when the outside air temperature is warmer than 40 F Below this temperature a factory installed outside air temperature switch will lock out this mode of operation See Table 29 for the Perfect Humidity dehumidification sys tem sequence of operation DISCHARGE SUBCOOLING RE HEAT DEHUMIDIFICATK SUCTION 2 CCH CRANKCASE HEATER FIXED RESTRICTOR ACUTROL DEVICE COMPRESSOR BULB LOW PRESSURE SWITCH EQUALIZER LINE THERMOSTATIC EXPANSION VALVE CXV CLOSED LIQUID LINE SOLENOID VALVE Fig 42 Perfect Humidity System Hot Gas Reheat Mode Operation Table 29 Perfect Humidity Dehumidification System Sequence of Operation and System Response Dual Compressor Units THERMOSTAT INPUT ECONOMIZER FUNCTION 551B UNIT OPERATION Second Stage 2 lt Economizer Compressor Subcooling Hot Gas Compressor Subcooling Hot Gas Set Point 1 Mode Reheat Mode 2 Mode Reheat Mode Unit Operates Under Normal Sequence of Operation No of o Ys wo o vs J N No Of Oo Ys N On N Ys N O No Ys LEGEND OAT Outdoor Air Temperature NOTE On a thermostat call for W1 all c
85. rifying that belt tension and pulley alignment are correct Replace belt if required V ECONOMISER IV ADJUSTMENT Refer to Optional EconoMi er IV section on page 13 VI REFRIGERANT CHARGE Amount of refrigerant charge is listed on unit nameplate also refer to Table 1 Refer to Bryant Standard Service Techniques Manual Chapter 1 Refrigerants section Unit panels must be in place when unit is operating during charging procedure A No Charge Locate and repair any refrigerant leak Use standard evacu ating techniques After evacuating system weigh in the specified amount of refrigerant refer to Table 1 B Low Charge Cooling Use Cooling Charging Charts Fig 47 50 Vary refrigerant until the conditions of the appropriate chart are met Note that charg ing charts are different from thetype normally used Charts are based on charging the units to the correct superheat for the var ious operating conditions Accurate pressure gage and tempera ture sensing device are required Connect the pressure gage to the service port on the suction line Mount the temperature sensing device on the suction line and insulate it so that outdoor ambient temperature does not affect the reading I ndoor air cfm must be within the normal operating range of the unit C Perfect Humidity System Charging The system charge for units with the Perfect Humidity option is greater than that of the standard unit alone The charge for units with this optio
86. roller selects the lower enthalpy air return or outdoor for cooling For example when the outdoor air has a lower enthalpy than the return air the EconoMi er IV opens to bring in outdoor air for free cooling Replace the standard outside air dry bulb temperature sensor with the accessory enthalpy sensor in the same mounting loca tion See Fig 19 Mount the return air enthalpy sensor in the return air duct See Fig 32 Wiring is provided in the EconoMi er IV wiring harness See Fig 25 The outdoor enthalpy changeover set point is set with the outdoor enthalpy set point potentiometer on the EconoMi er IV controller When using this mode of changeover control turn the enthalpy set point potentiometer fully dockwisetothe D setting EXHAUST FAN SET POINT LED LIGHTS WHEN EXHAUST CONTACT IS MADE MINIMUM DAMPER POSITION SETTING MAXIMUM DAMPER DEMAND CONTROL VENTILATION SET POINT LED LIGHTS WHEN DEMAND CONTROL VENTILATION INPUT IS ABOVE SETPOINT DEMAND CONTROL VENTILATION SET POINT LED LIGHTS WHEN OUTDOOR AIR IS SUITABLE FOR FREE COOLING ENTHALPY CHANGEOVER SET POINT Fig 30 EconoMi er IV Controller Potentiometer and LED Locations 40 45 50 55 60 65 70 75 80 85 90 95 100 DEGREES FAHRENHEIT Fig 31 Outdoor Air Temperature Changeover Set Point
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88. s ECONOMISER IV V CONTROLLER ECONOMISER IV GROMMET RETURN AIR SENSOR ye RETURN DUCT FIELD PROVIDED Fig 32 Return Air Temperature or Enthalpy Sensor Mounting Location Indoor Air Quality IAQ Sensor Input The input can be used for demand control ventilation control based on the level of CO measured in the space or return air duct Mount the accessory sensor according to manufacturer specifications The IAQ sensor should be wired to the AQ and CONTROL CONTROL POINT CURVE APPROX F C AT 50 RH ol LN AQ1 terminals of the controller Adjust the DCV potentiome ters to correspond to the DCV voltage output of the indoor air quality sensor at the user determined set point See Fig 35 If a separate field supplied transformer is used to power the IAQ sensor the sensor must not be grounded or the EconoMi er IV control board will be damaged 85 29 32 35 38 41 43 TRUST 95 100 105 110 n 22 7 23 PL SZ Ce Zs SZ SZ ZS V Z7 22712712 HIGH LIMIT CURVE y lt 2 85 90 95 100 105 110 2 4 7 10 13 16 18 21 24 27 29 32 35 38 41 43 APPROXIMATE DRY BULB TEMPERATURE F C Fig 33 Enthalpy Changeover Set Points TR m TRi Y
89. side on the condenser end of the unit being approximately equal to Fig 2 section C C Do not install unit in an indoor location Do not locate unit air inlet near exhaust vents or other sources of contaminated air Although unit is weatherproof guard against water from higher level runoff and overhangs After unit is in position remove polyethylene shi pping wrap per and rigging skid CONNECTOR D ALT ACCESSORY CRBTMPWR0014A01 s 374 19 NPT CRBTMPWRO002A01 19 117 81 7 2 87 1 1018 6 191 E 1 44 5 12 7 NPT 2 2 19 12 7 NPT P 19 174 131 7 17 12 7 NPT CRBTMPWRO04A01 GASKET NAIL SUPPLIED WITH CURB FIELD SUPPLIED RETURN AIR OPENING SUPPLY AIR OPENING TYPICAL 4 SIDES COUNTER FLASHING FIELD SUPPLIED NG FELT FIELD SUPPLIED CANT STRIP FIELD SUPPLIED ROOFING MATERIAL FIELD SUPPLIED ROOF CURB ACCESSORY UNIT SIZE CRRFCURBOOSAO 1 2 856 5090 150 CRRFCURB004A01 2 0 610 NOTES Roof curb accessory is shipped disassembled Insulated panels 1 in thick polyurethane foam 13 Ib density Dimensions in are in millimeters Roof curb 16 gage steel Attach ductwork to curb flanges of duct rest on curb Service clearance 4 ft on each side EZ Direction of airflow Connector packages CRBTMPWRO001A01 and
90. stor across So and 3 Place 1 2 kilo ohm resistor across Sp and The Free Cool LED should be lit 4 Remove 620 ohm resistor across So and The Free Cool LED should turn off 5 Return EconoMi er IV settings and wiring to normal after completing troubleshooting C Single Enthalpy To check single enthalpy 1 Make sure EconoMi er IV preparation procedure has been performed 2 Set the enthalpy potentiometer to A fully CCW The Free Cool LED should be lit 3 Set the enthalpy potentiometer to D fully CW The Free Cool LED should turn off 4 Return EconoMi er IV settings and wiring to normal after completing troubleshooting D DCV Demand Controlled Ventilation and Power Exhaust To check DCV and Power Exhaust 1 Make sure EconoMi er IV preparation procedure has been performed 2 Ensure terminals AQ and are open The L ED for both DCV and Exhaust should be off The actuator should be fully dosed 3 Connect a 9 v battery to AQ positive node and AQ1 negative node The LED for both DCV and Exhaust should turn on The actuator should drive to between 90 and 9596 open 4 Turn the Exhaust potentiometer CW until the Exhaust LED turns off The LED should turn off when the potentiometer is approximately 9096 The actuator should remain in position 5 Turn the DCV set point potentiometer CW until the DCV LED turns off The DCV LED should turn off when the potentiometer is approximately 9 v The actuator shou
91. t see Table 1 Do not operate unit without return air filters OUTDOOR AIR INLET SCREENS Outdoor air inlet screens must be in place before operating unit IV COMPRESSOR MOUNTING Compressors areinternally spring mounted Do not loosen or remove compressor holddown bolts V INTERNAL WIRING Check all electrical connections in unit control boxes tighten as required VI REFRIGERANT SERVICE PORTS Each refrigerant system has 4 Schrader type service gage ports one on the suction line oneon the liquid line and 2 on the compressor discharge line Be surethat caps on the ports aretight VII HIGH FLOW VALVES Two high flow refrigerant valves are located on the compres sor hot gas and suction tubes Large black plastic caps dis tinguish these valves with o rings located inside the caps These valves can not be accessed for service in the field Ensure the plastic caps in place and tight or the possibil ity of refrigerant leakage could occur VIII COMPRESSOR ROTATION On 3 phase units it is important to be certain the scroll compressor is rotating in the proper direction To determine whether or not compressor is rotating in the proper direction 1 Connect service gages to suction and discharge pres sure fittings 2 Energize the compressor 3 The suction pressure should drop and the discharge pressure should rise as is normal on any start up If the suction pressure does not drop and the discharge pres sure do
92. the damper will be at maximum ventilation and should maintain the set point In order to have the CO sensor control the economizer damper in this manner first determine the damper voltage output for minimum or base ventilation Base ventilation is the ventilation required to remove contaminants during unoccupied periods The following equation may be used to determine the percent of outside air entering the building for a given damper position For best results there should be at least a 10 degree difference in outside and return air temperatures OA RA _ To x 100 Tg X 1007 To Outdoor Air Temperature OA Percent of Outdoor Air Tg Return Air Temperature RA Percent of Return Air Mixed Air Temperature 19 Once base ventilation has been determined set the mini mum damper position potentiometer to the correct position The same equation can be used to determine the occupied or maximum ventilation rate to the building For example an output of 3 6 volts to the actuator provides base ventilation rate of 596 and an output of 6 7 volts provides the maximum ventilation rate of 2096 or base plus 15 cfm per person Use Fig 35 to determine the maximum setting of the CO sensor For example a 1100 ppm set point relates to a 15 cfm per person design Use the 1100 ppm curve on Fig 35 to find the point when the CO sensor output will be 6 7 volts Line up the point on the graph with the left side of the
93. ts 18 Evaporator coil 6 Cleaning 41 Evaporator fan motor 6 Lubrication 42 Motor data 22 23 Performance 24 37 Pulley adjustment 22 Pulley setting 6 22 Speed 6 Factory installed options Convenience outlet 73 Disconnect switch 17 IV 13 20 Manual outdoor air damper 13 Perfect Humidity M dehumidification system 1 1 12 Filter Cleaning 42 Installation 15 Size 6 Freeze protection thermostat 6 Heatanticipatorsettings JI High flow valves 38 High pressure switch Horizontal units 7 2 Humidistat 12 Indoor air quality sensor 18 Low pressure switch 6 Manual outdoor air damper 13 Mounting Uni 2 Non fused disconnect switch 11 Operating sequence Cooling 39 IV 39 Heating 39 Perfect Humidity dehumidification package 39 41 Outdoorairhood 13 15 Outdoor air temperature sensor 14 Outdoor air inlet screens Cleaning 42 Copyright 2005 Bryant Heating amp Cooling Systems INDEX Perfect Humidity dehumidification system 7 12 21 39 42 45 47 Physical data 6 Power supply Wiring 7 Pressure drop EconoMiSerIV 23 Electric heat 23 Perfect Humidity dehumidification 27 Pressure switches High pressure 6 Low pressure 6 Pre start up 38 Refrigerant Charge 6 42 Type 6 Refrigerant service ports 38 Replacement parts 45 Return air filter 6 38 Return air temperature sensor 17 Rigging unit 2 4 Roof curb Assembly 1 Dimensions 3 Connector package 3 Leveling tolerances 4 Weight 6 Safety
94. urn airstream See Fig 32 Wiring is provided in the IV wiring harness See Fig 25 In this mode of operation the outdoor air temperature is compared to the return air temperature and the lower tem perature airstream is used for cooling When using this mode of changeover control turn the enthalpy set point potenti om eter fully clockwise to the D setting See Fig 30 Outdoor Enthalpy Changeover For enthalpy control accessory enthalpy sensor part num 57 078 is required Replace the standard outdoor dry bulb temperature sensor with the accessory enthalpy sensor in the same mounting location See Fig 19 When the outdoor air enthalpy rises above the outdoor enthalpy changeover set point the outdoor air damper moves to its minimum position The outdoor enthalpy changeover set point is set with the outdoor enthalpy set point potenti ome ter on the IV controller The set points are A B and D See Fig 33 The factory installed 620 ohm jumper must be in place across terminals SR and SR on the EconoMi er IV controller See Fig 19 and 34 Differential Enthalpy Control For differential enthalpy control the EconoMi er IV control ler uses two enthalpy sensors HH57ACO78 and CRENTDIF004A00 one in the outside air and one in the return air duct The EconoMi er IV controller compares the outdoor air enthalpy to the return air enthalpy to determine EconoMi er IV use The cont

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