Carrier Puron R-410A Service And Maintenance Instructions Download | Manualshive

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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53500223-01

Printed in U.S.A.

Form 50KC-4-6-01SM

Pg 1

2-19

Replaces: NEW

Service and Maintenance Instructions

CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 1
UNIT ARRANGEMENT AND ACCESS. . . . . . . . . . . . . 2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Seasonal Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . 3
SUPPLY FAN (BLOWER) SECTION . . . . . . . . . . . . . . 4
Supply Fan (Belt-Drive) . . . . . . . . . . . . . . . . . . . . . . . . 4
COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Condenser Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Condenser Coil Maintenance and Cleaning

Recommendation. . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Evaporator Coil  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Refrigerant System Pressure Access Ports  . . . . . . 10
PURON® (R-410A) REFRIGERANT. . . . . . . . . . . . . . 11
Refrigerant Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Compressor  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Condenser Fan Adjustment  . . . . . . . . . . . . . . . . . . . 17
CONVENIENCE OUTLETS . . . . . . . . . . . . . . . . . . . . . 18
Non-Powered Type. . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Unit-Powered Type. . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Duty Cycle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Fuse on Powered Type  . . . . . . . . . . . . . . . . . . . . . . . 19
Using Unit-mounted Convenience Outlets  . . . . . . . 19
SMOKE DETECTORS . . . . . . . . . . . . . . . . . . . . . . . . . 19
System  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Controller  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Smoke Detector Locations  . . . . . . . . . . . . . . . . . . . . 20
Completing Installation of Return Air Smoke

Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

FIOP Smoke Detector Wiring and Response. . . . . . 21
Sensor and Controller Tests . . . . . . . . . . . . . . . . . . . 22
PROTECTIVE DEVICES . . . . . . . . . . . . . . . . . . . . . . . 25
Compressor Protection . . . . . . . . . . . . . . . . . . . . . . . 25
Relief Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Control Circuit, 24-v . . . . . . . . . . . . . . . . . . . . . . . . . . 25
ELECTRIC HEATERS . . . . . . . . . . . . . . . . . . . . . . . . . 25
Single Point Boxes and Supplementary Fuses . . . . 26
Completing Heater Installation . . . . . . . . . . . . . . . . . 27
PREMIERLINK™ CONTROLLER (FACTORY

OPTION) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

RTU-OPEN CONTROL SYSTEM . . . . . . . . . . . . . . . . 27
ECONOMIZER SYSTEMS. . . . . . . . . . . . . . . . . . . . . . 28
EconoMi$er IV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Economi$er® X (Factory Option) . . . . . . . . . . . . . . . 38
WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . 49

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
START-UP, GENERAL  . . . . . . . . . . . . . . . . . . . . . . . .52
Unit Preparation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Return-Air Filters  . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Outdoor-Air Inlet Screens  . . . . . . . . . . . . . . . . . . . . .52
Compressor Mounting . . . . . . . . . . . . . . . . . . . . . . . .52
Internal Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Refrigerant Service Ports. . . . . . . . . . . . . . . . . . . . . .52
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . .52
Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Heating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Ventilation (Continuous Fan). . . . . . . . . . . . . . . . . . .53
START-UP, PREMIERLINK CONTROLS . . . . . . . . . .53
START-UP, RTU-OPEN CONTROL  . . . . . . . . . . . . . .53
OPERATING SEQUENCE . . . . . . . . . . . . . . . . . . . . . .53
Base Unit Controls . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Cooling - Units without Economizer . . . . . . . . . . . . .53
Heating - Units without Economizer . . . . . . . . . . . . .53
Cooling, Unit with EconoMi$er IV . . . . . . . . . . . . . . .53
Heating, Unit with EconoMi$er IV . . . . . . . . . . . . . . .53
Demand Controlled Ventilation . . . . . . . . . . . . . . . . .53
FASTENER TORQUE VALUES. . . . . . . . . . . . . . . . . .54
APPENDIX A — MODEL NUMBER SIGNIFICANCE .55
APPENDIX B — PHYSICAL DATA . . . . . . . . . . . . . . .57
APPENDIX C — FAN PERFORMANCE . . . . . . . . . . .59
APPENDIX D — ELECTRICAL DATA. . . . . . . . . . . . .67
APPENDIX E — WIRING DIAGRAMS. . . . . . . . . . . . .75
APPENDIX F — MOTORMASTER SENSOR

LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . .CL-1

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service,

maintenance, or use can cause explosion, fire, electrical shock

or other conditions which may cause personal injury or

property damage. Consult a qualified installer, service agency,

or your distributor or branch for information or assistance. The

qualified installer or agency must use factory-authorized kits or

accessories when modifying this product. Refer to the

individual instructions packaged with the kits or accessories

when installing.
Follow all safety codes. Wear safety glasses and work gloves.

Use quenching cloths for brazing operations and have a fire

extinguisher available. Read these instructions thoroughly and

follow all warnings or cautions attached to the unit. Consult

local building codes and appropriate national electrical codes

(in USA, ANSI/NFPA70, National Electrical Code (NEC); in

Canada, CSA C22.1) for special requirements.
It is important to recognize safety information. This is the

safety-alert symbol

. When you see this symbol on the unit

and in instructions or manuals, be alert to the potential for

personal injury.

50KC04-06

Single Package Rooftop

Electric Cooling Units with Optional Electric Heat

with Puron

®

(R-410A) Refrigerant

1
2
3
...
»

Summary of Contents for Puron R-410A

Page 1: ...2 Cooling 52 Heating 52 Ventilation Continuous Fan 53 START UP PREMIERLINK CONTROLS 53 START UP RTU OPEN CONTROL 53 OPERATING SEQUENCE 53 Base Unit Controls 53 Cooling Units without Economizer 53 Heating Units without Economizer 53 Cooling Unit with EconoMi er IV 53 Heating Unit with EconoMi er IV 53 Demand Controlled Ventilation 53 FASTENER TORQUE VALUES 54 APPENDIX A MODEL NUMBER SIGNIFICANCE 55...

Page 2: ...ess checked Condensate drain checked WARNING ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal injury or death Before performing service or maintenance operations on unit turn off main power switch to unit Electrical shock and rotating equipment could cause injury WARNING ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal injury or...

Page 3: ...each inside and extract the filters from the filter rack 4 Replace these filters as required with similar replacement filters of same size To re install the access panel 1 Slide the top of the panel up under the unit top panel 2 Slide the bottom into the side channels 3 Push the bottom flange down until it contacts the top of the lower panel or economizer top IMPORTANT DO NOT OPERATE THE UNIT WITH...

Page 4: ... alignment of the pulleys adjust if necessary 7 Tighten all bolts 8 Check the tension after a few hours of runtime and re adjust as required ADJUSTABLE PITCH PULLEY ON MOTOR The motor pulley is an adjustable pitch type that allows a ser vicer to implement changes in the fan wheel speed to match as installed ductwork systems The pulley consists of a fixed flange side that faces the motor secured to...

Page 5: ...maintain proper operation of the unit Elimination of contamination and remov al of harmful residues will greatly increase the life of the coil and extend the life of the unit The following maintenance and cleaning procedures are recommended as part of the routine maintenance activities to extend the life of the coil REMOVE SURFACE LOADED FIBERS Surface loaded fibers or dirt should be removed with ...

Page 6: ...able 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 7 Secure inner and outer coil rows together with a field sup plied fastener 8 Reposition the outer coil section and remove the coil cor ner post from between the top panel and center post Rein stall the coil corner post and replace all screws Totaline ...

Page 7: ...ownward rinsing motion of water spray noz zle Protect fins from damage from the spray nozzle Evaporator Coil CLEANING THE EVAPORATOR COIL 1 Turn unit power off Install lockout tag Remove evapora tor coil access panel 2 If economizer or two position damper is installed remove economizer by disconnecting Molex plug and removing mounting screws 3 Slide filters out of unit 4 Clean coil using a commerc...

Page 8: ...8 NOTE Each feeder tube in the liquid header has a metering device Fig 11 50KC A B Sizes 04 05 Metering Piping Diagram Accutrol ...

Page 9: ...9 NOTE Each feeder tube in the liquid header has a metering device Fig 12 50KC A B Sizes 06 Dual Metering Piping Diagram Accutrol Accurater ...

Page 10: ...tly assembled into this core body and cannot be serviced separately replace the entire core body if necessary Service tools are available from RCD that allow the replacement of the check valve core without having to recover the entire system refrigerant charge Apply compressor refrig erant oil to the check valve core s bottom o ring Install the fit ting body with 96 10 in lb of torque do not over ...

Page 11: ...t are met Note the charging charts are differ ent from type normally used Charts are based on charging the units to the correct superheat for the various operating condi tions Accurate pressure gage and temperature 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 am...

Page 12: ... N I L N O I T C U S SUCTION LINE TEMPERATURE Cooling Charging Chart Standard 3 Ton R410A Refrigerant OUTDOOR TEMP F C 115 46 105 41 95 35 85 29 75 24 65 18 1 1 1 6 4 4 7 2 10 12 8 15 6 18 3 21 1 23 9 26 7 29 4 32 2 F C a p K e r u s s e r P n o i t c u S 1241 1172 1103 1034 965 896 827 758 690 621 552 48KC000264 Rev 65 F 18 C 75 F 24 C 95 F 35 C 85 F 29 C 105 F 41 C 115 F 46 C ...

Page 13: ... C U S SUCTION LINE TEMPERATURE Cooling Charging Chart Standard 4 Ton Single Phase R410A Refrigerant OUTDOOR TEMP F C 115 46 105 41 95 35 85 29 75 24 65 18 1 1 1 6 4 4 7 2 10 12 8 15 6 18 3 21 1 23 9 26 7 29 4 32 2 F C a p K e r u s s e r P n o i t c u S 1241 1172 1103 1034 965 896 827 758 690 621 552 48KC000267 Rev 65 F 18 C 75 F 24 C 85 F 29 C 95 F 35 C 105 F 41 C 115 F 46 C ...

Page 14: ... C U S SUCTION LINE TEMPERATURE Cooling Charging Chart Standard 4 Ton Three Phase R410A Refrigerant 1 1 1 6 4 4 7 2 10 12 8 15 6 18 3 21 1 23 9 26 7 29 4 32 2 F C a p K e r u s s e r P n o i t c u S 1241 1172 1103 1034 965 896 827 758 690 621 552 48KC000268 Rev OUTDOOR TEMP F C 115 46 105 41 95 35 85 29 75 24 65 18 65 F 18 C 75 F 24 C 85 F 29 C 95 F 35 C 105 F 41 C 115 F 46 C ...

Page 15: ... C U S SUCTION LINE TEMPERATURE Cooling Charging Chart Standard 5 Ton Single Phase R410A Refrigerant OUTDOOR TEMP F C 115 46 105 41 95 35 85 29 75 24 65 18 1 1 1 6 4 4 7 2 10 12 8 15 6 18 3 21 1 23 9 26 7 29 4 32 2 F C a p K e r u s s e r P n o i t c u S 1241 1172 1103 1034 965 896 827 758 690 621 552 48KC000271 Rev 65 F 18 C 75 F 24 C 85 F 29 C 95 F 35 C 105 F 41 C 115 F 46 C ...

Page 16: ... C U S SUCTION LINE TEMPERATURE Cooling Charging Chart Standard 5 Ton Three Phase R410A Refrigerant OUTDOOR TEMP F C 115 46 105 41 95 35 85 29 75 24 65 18 1 1 1 6 4 4 7 2 10 12 8 15 6 18 3 21 1 23 9 26 7 29 4 32 2 F C a p K e r u s s e r P n o i t c u S 1241 1172 1103 1034 965 896 827 758 690 621 552 48KC000272 Rev 65 F 18 C 75 F 24 C 85 F 29 C 95 F 35 C 105 F 41 C 115 F 46 C ...

Page 17: ...t breaker tripped Replace fuse or reset circuit breaker Defective thermostat contactor transformer or control relay Replace component Insufficient line voltage Determine cause and correct Incorrect or faulty wiring Check wiring diagram and rewire correctly Thermostat setting too high Lower thermostat setting below room temperature Compressor will not start but condenser fan runs Faulty wiring or l...

Page 18: ...et circuit being de energized when the unit disconnect or HACR switch is open See Fig 22 Fig 22 Powered Convenience Outlet Wiring Head pressure too low Low refrigerant charge Check for leaks repair and recharge Compressor valves leaking Replace compressor Restriction in liquid tube Remove restriction Excessive suction pressure High head load Check for source and eliminate Compressor valves leaking...

Page 19: ...eration additional wiring or modifications to unit terminal board may be necessary to complete the unit and smoke detector configuration to meet project requirements System The smoke detector system consists of a four wire controller and one or two sensors Its primary function is to shut down the roof top unit in order to prevent smoke from circulating throughout the building It is not to be used ...

Page 20: ...on RETURN AIR WITHOUT ECONOMIZER The sampling tube is located across the return air opening on the unit basepan See Fig 26 The holes in the sampling tube face downward into the return air stream The sampling tube is connected via tubing to the return air sensor that is mounted on a bracket high on the partition between return filter and con troller location This sensor is shipped in a flat mountin...

Page 21: ...tector HIGHLIGHT B Smoke detector NC contact set will open on smoke alarm con dition de energizing the ORN conductor HIGHLIGHT C 24 v power signal via ORN lead is removed at Smoke Detector input on CTB all unit operations cease immediately PREMIERLINK CONTROL Unit operating functions fan cooling and heating are termi nated as described above HIGHLIGHT D On smoke alarm condition the smoke detector ...

Page 22: ... for environmental changes is considered 100 dirty and requires cleaning or replacing A field provided SD MAG test magnet must be used to initiate a sensor dirty test The sensor s Dirty LED indicates the results of the dirty test as shown in Table 2 B D F E A C 48TM500213 L CAUTION OPERATIONAL TEST HAZARD Failure to follow this caution may result in personnel and authority concern This test places...

Page 23: ...tion see Changing the dirty sensor test opera tion on page 23 Fig 31 Remote Test Reset Station Connections Dirty Sensor Test Using an SD TRK4 1 Turn the key switch to the RESET TEST position for two seconds 2 Verify that the test reset station s Trouble LED flashes Table 2 Dirty LED Test FLASHES DESCRIPTION 1 0 25 dirty Typical of a newly installed detector 2 25 50 dirty 3 51 75 dirty 4 76 99 dirt...

Page 24: ...ult between a sensor and the controller is detected An internal sensor fault is detected upon entering the trouble state The contacts on the controller s supervisory relay switch positions See Fig 33 If a sensor trouble the sensor s Trouble LED the control ler s Trouble LED turn on If 100 dirty the sensor s Dirty LED turns on and the controller s Trouble LED flashes continuously If a wiring fault ...

Page 25: ...high discharge gas temperatures HIGH PRESSURE SWITCH The system is provided with a high pressure switch mounted on the discharge line The switch is stem mounted and brazed into the discharge tube Trip setting is 630 psig 10 psig 4344 69 kPa when hot Reset is automatic at 505 psig 3482 kPa LOW PRESSURE SWITCH The system is protected against a loss of charge and low evapo rator coil loading conditio...

Page 26: ...rdless of ac tual heater ampacity so only 60 A fuses are necessary Unit heater applications not requiring supplemental fuses re quire a special single point box without any fuses Connect power supply conductors to heater conductors and field sup plied base unit power tap leads see text below regarding Completing Heater Installation inside the empty single point box using UL approved connectors SAF...

Page 27: ...ole terminal board TB4 located on the heater bulkhead to the left of Heater 1 Connect the VIO lead from Heater 1 to terminal TB4 1 Connect the VIO lead from Heater 2 to terminal TB4 2 Connect both BRN leads to terminal TB4 3 See Fig 39 Fig 39 Accessory Electric Heater Control Connections PREMIERLINK CONTROLLER Factory Option For details on 50KC 04 06 units equipped with the factory in stalled Prem...

Page 28: ...r is used for EconoMi er IV and the W7220 controller is used for EconoMi er X See Fig 44 47 for econo mizer section wiring diagrams All three economizers use direct drive damper actuators Fig 41 EconoMi er X Component Locations Fig 42 EconoMi er IV Component Locations Fig 43 EconoMi er2 Component Locations OUTSIDE AIR TEMPERATURE SENSOR WIRING HARNESS ECONOMI ER IV CONTROLLER OUTSIDE AIR TEMPERATU...

Page 29: ...29 Fig 44 RTU Open Overlay for Economizer Wiring ...

Page 30: ...30 Fig 45 VFD Overlay for W2770 Controller Wiring ...

Page 31: ...b sensor or HH57A077 enthalpy sensor 3 50HJ540573 actuator consists of the 50HJ540567 actuator and a harness with 500 ohm resistor Fig 47 EconoMi er2 with 4 to 20 mA Control Wiring 4 3 5 2 8 6 7 1 10 11 9 12 PINK VIOLET BLACK BLUE YELLOW NOTE 1 NOTE 3 RUN 500 OHM RESISTOR 50HJ540573 ACTUATOR ASSEMBLY RED WHITE ECONOMISER2 PLUG DIRECT DRIVE ACTUATOR 4 20mA SIGNAL OAT SENSOR 4 20 mA TO J9 ON Premier...

Page 32: ...nctional View For single enthalpy control the module compares outdoor enthalpy to the ABCD set point Power at N terminal determines Occupied Unoccupied setting 24 vac Occupied no power Unoccupied Modulation is based on the supply air sensor signal Modulation is based on the DCV signal Modulation is based on the greater of DCV and supply air sensor signals between minimum position and either maximu...

Page 33: ...de 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 system will adjust the outside air dampers to minimum position If the outdoor air temperature is below the set point the position of the outside air dampers will be controlled to provided free cooling using outdoor air When in this mode t...

Page 34: ...e 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 controller selects the lower enthalpy air return or out door 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 b...

Page 35: ...rm the fol lowing procedure 1 Calculate the appropriate mixed air temperature using the following formula TO Outdoor Air Temperature OA Percent of Outdoor Air TR 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 re turn air temperature is 75 F 60 x 0 10 75 x 0 9...

Page 36: ...s position Do not set to the maximum position as this can result in over ventilation to the space and potential high humidity levels CO2 Sensor Configuration The CO2 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 Carrier equipment See Table 7 1 Press Clear and Mode buttons Hold at least 5 seconds until the ...

Page 37: ...conds after the Exhaust LED turns on 7 Return EconoMi er IV settings and wiring to normal after completing troubleshooting 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 actua tor should drive to between ...

Page 38: ...s are available with bus sensors User Interface Provides status for normal operation setup parameters check out tests and alarm and error conditions with a 2 line 16 char acter LCD display and four button keypad Electrical Rated Voltage 20 to 30 vac RMS 50 60 Hz Transformer 100 va maximum system input Nominal Power Consumption at 24 vac 60 Hz 11 5 VA without sensors or actuators Relay Digital Outp...

Page 39: ...le Left Hand Terminal Blocks LABEL TYPE DESCRIPTION Top Left Terminal Block MAT MAT 20k NTC and COM Mixed Air Temperature Sensor Polarity Insensitive Connection OAT OAT 20k NTC and COM Outdoor Air Temperature Sensor Polarity Insensitive Connection S BUS S BUS S BUS Sylk Bus Enthalpy Control Sensor Polarity Insensitive Connection Bottom Left Terminal Block IAQ 2 10 2 10 vdc Air Quality Sensor Input...

Page 40: ...hrough the menus and menu items select menu items and to change parameter and configuration settings To use the keypad when working with menus Press the Up arrow button to move to the previous menu Press the Down arrow button to move to the next menu Press the Enter button to display the first item in the currently displayed menu Press the Menu Up Exit button to exit a menu s item and return to th...

Page 41: ... SETUP CHECKOUT ALARMS NOTE Some parameters in the menus use the letters MA or MAT indicating a mixed air temperature sensor location before the cooling coil This unit application has the control sensor locat ed after the cooling coil in the fan section where it is designated as Cooling Supply Air Temperature or SAT sensor SETUP AND CONFIGURATION Before being placed into service the W7220 Economiz...

Page 42: ... and displays measured discharge temperature Displays _ _ _F if sensor sends invalid value if not connected short or out of range OA TEMP _ _ _ F or _ _ _ C 40 F to 140 F 40 C to 60 C OUTSIDE AIR TEMP Displays measured value of outdoor air temperature Displays _ _ _F if sensor sends invalid value short or out of range OA HUM _ _ 0 to 100 OUTSIDE AIR RELATIVE HUMIDITY Displays measured value of out...

Page 43: ...N Displays only if CO2 sensor is connected Set point for Demand Controlled Ventilation of space Above the set point the OA dampers will modulate open to bring in additional OA to maintain a space ppm level below the set point MIN POS 2 8 V 2 to 10 vdc VENTILATION MINIMUM POSITION Displays ONLY if a CO2 sensor is NOT connected VENTMAX 2 8 V 2 to 10 vdc DCV MAXIMUM DAMPER POSITION Displays only if a...

Page 44: ...ITION Damper position when freeze protection is active closed or MIN POS CO2 ZERO 0ppm 0 to 500 ppm Increment by 10 CO2 ppm level to match CO2 sensor start level CO2 SPAN 2000ppm 1000 to 3000 ppm Increment by 50 CO2 ppm span to match CO2 sensor e g 500 1500 sensor output would be 500 CO2 zero and 1000 CO2 span STG3 DLY 2 0h 0 min 5 min 15 min then 15 min intervals Up to 4 hrs or OFF COOLING STAGE ...

Page 45: ...ange or become disconnected check wiring then replace sensor if the alarm continues OA SYLK T ERR N A N A OUTSIDE AIR S BUS SENSOR ERROR Outdoor air enthalpy sensor has failed or become disconnected check wiring then replace sensor if the alarm continues OA SYLK H ERR N A N A RA SYLK T ERR N A N A RETURN AIR S BUS SENSOR ERROR Return air enthalpy sensor has failed or become disconnected check wiri...

Page 46: ...2 Speed unit operation EQUIPMENT CONV AUX2 I W FAN SPEED 2SPEED For damper minimum position settings and checkout menu read ings see Table 13 For dry bulb operation with or without DCV see Tables 14 and 15 For enthalpy operation with or without DCV see Tables 16 and 17 With stage 3 delay STG3 DLY in Advanced setup menu can turn on second stage of mechanical cooling Y2 O after the delay if the call...

Page 47: ...High 24 v On 24 v On VENTMIN to VENTMAX Closed Yes Off Off High 0 v Off 0 v Off VENTMIN to VENTMAX Closed On Off High 0 v Off 0 v Off VENTMIN to Full Open Closed to Full Open On On High 24 v On 0 v Off VENTMIN to Full Open Closed to Full Open Table 16 Enthalpy Operation Without DCV CO2 Sensor 1 Speed Fan DEMAND CONTROLLED VENTILATION DCV OUTSIDE AIR GOOD TO ECONOMIZE Y1 I Y2 I FAN SPEED Y1 O Y2 O ...

Page 48: ...boundary the conditions are not good to economize and the mode is set to NO Figure 62 shows the 5 current boundaries There is also a high lim it boundary for differential enthalpy The high limit boundary is ES1 when there are no stages of mechanical cooling energized and HL high limit when a compressor stage is energized Fig 62 Single Enthalpy Curve Boundaries ECONOMIZING AVAILABLE NOT AVAILABLE E...

Page 49: ...he Enter button to start the test The unit pauses and then displays IN PROGRESS When the test is complete DONE appears 4 When all desired parameters have been tested press the Menu Up button to end the test The Checkout tests can all be performed at the time of installa tion or at any time during the operation of the system as a test that the system is operable TROUBLESHOOTING Alarms The economize...

Page 50: ...50 Fig 63 50KC Typical Unit Wiring Diagram Power 06A 208 230 3 60 ...

Page 51: ...51 Fig 64 50KC Unit Wiring Diagram Control A06 ...

Page 52: ...ure fittings 2 Energize the compressor 3 The suction pressure should drop and the discharge pres sure should rise as is normal on any start up If the suction pressure does not drop and the discharge pressure does not rise to normal levels 1 Note that 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 uni...

Page 53: ...ition as determined by occupancy mode and fan signal When free cooling is available as determined by the appropri ate changeover command dry bulb outdoor enthalpy differen tial dry bulb or differential enthalpy a call for cooling Y1 closes at the thermostat will cause the economizer control to modulate the dampers open and closed to maintain the unit supply air temperature at 50 F to 55 F Compress...

Page 54: ...ing 120 12 in lb Supply fan motor adjustment plate 120 12 in lb Motor pulley setscrew 72 5 in lb Fan pulley setscrew 72 5 in lb Blower wheel hub setscrew 72 5 in lb Bearing locking collar setscrew 65 to 70 in lb Compressor mounting bolts 65 to 75 in lb Condenser fan motor mounting bolts 20 2 in lb Condenser fan hub setscrew 84 12 in lb ...

Page 55: ...Standard 1 LTL Electrical Options A None C Non Fused Disconnect D Thru the Base Connections F Non Fused Disconnect and Thru the Base Connections Service Options 0 None 1 Unpowered Convenience Outlet 2 Powered Convenience Outlet 3 Hinged Panels 4 Hinged Panels Unpowered Convenience Outlet 5 Hinged Panels Powered Convenience Outlet Intake Exhaust Options A None B Temperature Economizer w Barometric ...

Page 56: ...rmat POSITION NUMBER 1 2 3 4 5 6 7 8 9 10 TYPICAL 1 2 0 8 C 1 2 3 4 6 POSITION DESIGNATES 1 2 Week of manufacture fiscal calendar 3 4 Year of manufacture 08 2008 5 Manufacturing location C Monterrey Mexico 6 10 Sequential number ...

Page 57: ... 48 Fan Qty Type 1 Centrifugal 1 Centrifugal 1 Centrifugal Fan Diameter in 10 x 10 10 x 10 10 x 10 MEDIUM STATIC 1 PHASE Motor Qty Drive Type 1 Belt 1 Belt 1 Belt Max BHP 1 2 1 2 1 5 RPM Range 770 1175 770 1175 1035 1466 Motor Frame Size 48 48 56 Fan Qty Type 1 Centrifugal 1 Centrifugal 1 Centrifugal Fan Diameter in 10 x 10 10 x 10 10 x 10 HIGH STATIC 1 PHASE Motor Qty Drive Type 1 Belt 1 Belt N A...

Page 58: ... Type 3 8 RTPF 3 8 RTPF 3 8 RTPF Rows FPI 1 17 2 17 2 17 Total Face Area ft2 16 5 14 6 18 8 Cond fan motor Qty Motor Drive Type 1 direct 1 direct 1 direct Motor HP RPM 1 8 825 1 4 1100 1 4 1100 Fan diameter in 22 22 22 Filters RA Filter Size in Cu Al Cu Al Cu Al OA inlet screen Size in 3 8 RTPF 3 8 RTPF 3 8 RTPF Table B PHYSICAL DATA Cooling 3 5 Tons cont 50KC A04 50KC A05 50KC A06 ...

Page 59: ...R11HY161 and belt part number KR30AE035 with field sup plied drive Table C 50KC 04 3 Ton Horizontal Supply 1 Phase CFM AVAILABLE EXTERNAL STATIC PRESSURE in wg 0 2 0 4 0 6 0 8 1 0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 900 574 0 13 707 0 23 817 0 34 913 0 47 999 0 61 975 597 0 15 727 0 25 835 0 37 929 0 50 1015 0 64 1050 621 0 18 747 0 28 853 0 40 946 0 53 1030 0 68 1125 646 0 20 768 0 31 872 0 4...

Page 60: ... 642 0 19 777 0 30 896 0 43 1003 0 58 1102 0 75 1125 668 0 22 797 0 34 912 0 47 1017 0 62 1113 0 79 1200 695 0 25 818 0 37 930 0 51 1032 0 66 1126 0 83 1275 722 0 29 841 0 41 949 0 55 1048 0 71 1140 0 88 1350 750 0 33 864 0 46 968 0 60 1065 0 76 1155 0 93 1425 778 0 37 888 0 50 989 0 65 1083 0 81 1171 0 99 1500 807 0 42 913 0 56 1011 0 71 1103 0 87 1188 1 05 CFM AVAILABLE EXTERNAL STATIC PRESSURE ...

Page 61: ...385 1 62 1200 1140 0 92 1210 1 10 1276 1 28 1339 1 47 1399 1 68 1275 1157 0 97 1226 1 15 1292 1 33 1354 1 53 1414 1 73 1350 1174 1 02 1243 1 20 1308 1 39 1370 1 59 1429 1 80 1425 1192 1 08 1260 1 26 1325 1 45 1386 1 65 1444 1 86 1500 1210 1 14 1278 1 33 1342 1 52 1403 1 72 1461 1 93 Medium static 770 1175 RPM 1 7 BHP max High static 1035 1466 RPM 2 9 BHP max Table F 50KC 04 3 Ton Vertical Supply 3...

Page 62: ...LABLE EXTERNAL STATIC PRESSURE in wg 1 2 1 4 1 6 1 8 2 0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 900 1140 0 92 1210 1 10 1276 1 28 1339 1 47 975 1162 0 99 1232 1 16 1297 1 35 1050 1186 1 06 1254 1 24 1319 1 43 1125 1210 1 14 1278 1 33 1200 1236 1 23 1302 1 42 1275 1262 1 33 1350 1289 1 44 1425 1500 Medium static 770 1175 RPM 1 2 BHP max High static 1035 1466 RPM 1 5 BHP max Table H 50KC 05 4 Ton V...

Page 63: ... 0 89 1165 1 05 1275 851 0 52 949 0 66 1038 0 81 1118 0 97 1192 1 15 1350 888 0 60 984 0 75 1069 0 90 1148 1 07 1221 1 25 1425 927 0 69 1019 0 84 1102 1 00 1179 1 18 1250 1 36 1500 965 0 78 1054 0 94 1135 1 11 1210 1 29 1280 1 48 CFM AVAILABLE EXTERNAL STATIC PRESSURE in wg 1 2 1 4 1 6 1 8 2 0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 900 1140 0 92 1210 1 10 1276 1 28 1339 1 47 1399 1 68 975 1162 0 ...

Page 64: ...in wg 1 2 1 4 1 6 1 8 2 0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 900 1215 1 01 1298 1 21 1378 1 42 1454 1 64 1526 1 87 975 1231 1 08 1313 1 28 1390 1 49 1465 1 71 1536 1 94 1050 1249 1 16 1329 1 36 1405 1 57 1478 1 79 1547 2 03 1125 1270 1 24 1347 1 45 1421 1 66 1492 1 89 1200 1292 1 34 1367 1 54 1440 1 76 1509 1 99 1275 1315 1 44 1389 1 65 1459 1 88 1527 2 11 1350 1341 1 56 1412 1 77 1481 2 00 1...

Page 65: ...75 1251 1 30 1313 1 47 1050 1289 1 44 1125 1200 1275 1350 1425 1500 Medium static 1035 1466 RPM 1 5 BHP max Table M 50KC 06 5 Ton Horizontal Supply 3 Phase CFM AVAILABLE EXTERNAL STATIC PRESSURE in wg 0 2 0 4 0 6 0 8 1 0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 900 725 0 33 840 0 46 937 0 60 1023 0 75 1101 0 90 975 765 0 40 876 0 54 970 0 68 1054 0 84 1131 1 00 1050 806 0 48 912 0 63 1004 0 78 1087...

Page 66: ... 1 81 1462 2 01 1514 2 20 1125 1327 1 60 1387 1 80 1444 1 99 1498 2 19 1550 2 40 1200 1366 1 78 1426 1 98 1482 2 19 1535 2 40 1275 1406 1 97 1464 2 18 1520 2 40 1350 1446 2 18 1504 2 40 1425 1487 2 40 1544 2 63 1500 1529 2 64 Medium static 1035 1466 1303 RPM 2 9 BHP max High static 1303 1550 RPM 2 9 BHP max Table O PULLEY ADJUSTMENT BELT DRIVE UNIT MOTOR DRIVE COMBO MOTOR PULLEY TURNS OPEN 0 0 5 1...

Page 67: ...78 4 0 190 0 5 MED 87 2 5 190 0 5 HIGH 89 4 2 575 3 60 518 633 3 8 37 190 0 5 DD STD 78 4 0 190 0 5 MED 72 1 6 190 0 5 HIGH 77 2 8 Table Q 50KC 05 4 Tons Cooling v Ph Hz UNIT VOLTAGE COMP 1 OFM ea IFM RANGE RLA LRA WATTS FLA TYPE EFF at Full Load FLA MIN MAX 208 1 60 187 253 21 8 117 325 1 5 DD STD 78 7 4 325 1 5 MED 67 4 9 325 1 5 HIGH 76 7 0 230 1 60 187 253 21 8 117 325 1 5 DD STD 78 7 4 325 1 ...

Page 68: ...OFM ea IFM RANGE RLA LRA WATTS FLA TYPE EFF at Full Load FLA MIN MAX 208 1 60 187 253 25 0 134 325 1 4 DD STD 78 7 4 325 1 4 MED 76 7 0 230 1 60 187 253 25 0 134 325 1 4 DD STD 78 7 4 325 1 4 MED 76 7 0 208 3 60 187 253 15 9 110 325 1 4 DD STD 78 7 4 325 1 4 MED 89 8 4 325 1 4 HIGH 89 8 4 230 3 60 187 253 15 9 110 325 1 4 DD STD 78 7 4 325 1 4 MED 89 8 3 325 1 4 HIGH 89 8 3 460 3 60 414 506 7 0 52...

Page 69: ...2A 4 9 6 5 13 6 15 6 27 29 30 30 24 26 82 82 29 32 30 35 26 29 84 84 103B 6 5 8 7 18 1 20 9 32 36 35 40 29 33 82 82 35 38 35 40 32 35 84 84 104B 7 9 10 5 21 9 25 3 37 41 40 45 34 38 82 82 39 44 40 45 36 40 84 84 105A 12 0 16 0 33 4 38 5 51 58 60 60 47 53 82 82 54 60 60 60 49 55 84 84 MED NONE 20 19 25 25 19 19 111 22 21 30 30 21 21 113 101A 3 3 4 4 9 2 10 6 20 20 25 25 19 19 111 111 22 22 30 30 21...

Page 70: ...6 5 13 6 15 6 33 35 35 35 30 32 87 87 35 38 35 40 32 34 89 89 103B 6 5 8 7 18 1 20 9 38 42 40 45 35 38 87 87 41 44 45 45 37 40 89 89 104B 7 9 10 5 21 9 25 3 43 47 45 50 39 43 87 87 45 50 50 50 41 45 89 89 105A 12 0 16 0 33 4 38 5 57 64 60 70 52 58 87 87 60 66 60 70 55 60 89 89 MED NONE 24 24 30 30 25 24 116 26 26 30 30 27 26 118 101A 3 3 4 4 9 2 10 6 24 26 30 30 25 24 116 116 27 28 30 30 27 26 118...

Page 71: ...106 121 110 125 97 111 160 160 208 230 3 60 DD STD NONE 26 30 26 94 28 40 28 96 102A 4 9 6 5 13 6 15 6 27 29 30 30 26 26 94 94 29 32 40 40 28 29 96 96 103B 6 5 8 7 18 1 20 9 32 36 35 40 29 33 94 94 35 38 40 40 32 35 96 96 105A 12 0 16 0 33 4 38 5 51 58 60 60 47 53 94 94 54 60 60 60 49 55 96 96 104B 104B 15 8 21 0 43 8 50 5 64 73 70 80 59 67 94 94 67 75 70 80 61 69 96 96 MED NONE 24 24 30 30 23 23 ...

Page 72: ...127 125 150 103 116 165 165 208 230 3 60 DD STD NONE 31 40 32 99 33 45 34 101 102A 4 9 6 5 13 6 15 6 33 35 40 40 32 32 99 99 35 38 45 45 34 34 101 101 103B 6 5 8 7 18 1 20 9 38 42 40 45 35 38 99 99 41 44 45 45 37 40 101 101 105A 12 0 16 0 33 4 38 5 57 64 60 70 52 58 99 99 60 66 60 70 55 60 101 101 104B 104B 15 8 21 0 43 8 50 5 70 79 80 80 64 72 99 99 73 81 80 90 67 74 101 101 MED NONE 29 29 40 40 ...

Page 73: ...89 80 90 72 82 120 120 81 92 90 100 74 84 122 122 MED NONE 30 30 45 45 30 29 185 32 32 45 45 32 32 187 102A 4 9 6 5 13 6 15 6 30 30 45 45 30 29 185 185 32 33 45 45 32 32 187 187 104B 7 9 10 5 21 9 25 3 38 42 45 45 35 39 185 185 41 45 45 45 37 41 187 187 105A 12 0 16 0 33 4 38 5 53 59 60 60 48 54 185 185 55 61 60 70 50 56 187 187 104B 104B 15 8 21 0 43 8 50 5 66 74 70 80 60 68 185 185 68 76 70 80 6...

Page 74: ...0 78 87 125 125 87 98 90 100 80 90 127 127 MED NONE 35 35 50 50 35 35 190 37 37 50 50 37 37 192 102A 4 9 6 5 13 6 15 6 35 36 50 50 35 35 190 190 37 39 50 50 37 37 192 192 104B 7 9 10 5 21 9 25 3 44 48 50 50 40 44 190 190 47 51 50 60 43 46 192 192 105A 12 0 16 0 33 4 38 5 59 65 60 70 54 59 190 190 61 67 70 70 56 62 192 192 104B 104B 15 8 21 0 43 8 50 5 72 80 80 80 66 73 190 190 74 82 80 90 68 75 19...

Page 75: ...0211 page 77 208 230 3 60 48TM500214 page 79 460 3 60 48TM500214 page 79 575 3 60 48TM500214 page 79 A05 208 230 1 60 48KC000133 page 78 208 230 3 60 48TM500214 page 79 460 3 60 48TM500214 page 79 575 3 60 48TM500214 page 79 A06 208 230 1 60 48TM500211 page 77 208 230 3 60 48TM500214 page 79 460 3 60 48TM500214 page 79 575 3 60 48TM500214 page 79 ...

Page 76: ...76 Fig B Unit Wiring Diagram Controls for Sizes A04 A06 208 230 1 60 208 230 3 60 460 3 60 575 3 60 ...

Page 77: ...77 Fig C Unit Wiring Diagram Power for Sizes A04 and A06 208 230 1 60 ...

Page 78: ...78 Fig D Unit Wiring Diagram Power for Size A05 208 230 1 60 ...

Page 79: ...79 Fig E Unit Wiring Diagram Power for Sizes A04 A06 208 230 3 60 460 3 60 575 3 60 ...

Page 80: ...80 APPENDIX F MOTORMASTER SENSOR LOCATIONS Fig F 50KC A04 Outdoor Circuiting Fig G 50KC A05 Outdoor Circuiting ...

Page 81: ...81 Fig H 50KC A06 Outdoor Circuiting ...

Page 82: ...right to discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53500223 01 Printed in U S A Form 50KC 4 6 01SM Pg 82 2 19 Replaces NEW Carrier Corporation 2019 ...

Page 83: ...repair if necessary Y N _____ Verify that all electrical connections and terminals are tight Y N _____ Check that indoor air filters are clean and in place Y N _____ Check that outdoor air inlet screens are in place Y N _____ Verify that unit is level Y N _____ Check fan wheels and propeller for location in housing orifice and verify setscrew is tight Y N _____ Verify that electrical wiring is not...

Page 84: ...acts Y N _____ 3 Start unit In cooling Close Y1 Y N _____ OBSERVE AND RECORD A Suction pressure _______________ PSIG B Discharge pressure _______________ PSIG C Entering air temperature _______________ F D Liquid line temperature at outlet or reheat coil _______________ F E Confirm correct rotation for compressor Y N _____ F Check for correct ramp up of outdoor fan motor as condenser coil warms Y ...

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