Carrier 50LC 14 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. 04-53500167-01

Printed in U.S.A.

Form 50LC-14-26-03SM

Pg 1

2-2020

Replaces: 50LC-14-26-02SM

Service and Maintenance Instructions

CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SUPPLY FAN (BLOWER) SECTION  . . . . . . . . . . . . . . 3
Supply Fan Assembly  . . . . . . . . . . . . . . . . . . . . . . . . . 3
Changing Fan Wheel Speed by Changing Pulleys . . 4
COOLING  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Evaporator Coil  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Coil Maintenance and Cleaning Recommendation . . 5
Evaporator Coil Metering Devices  . . . . . . . . . . . . . . . 6
Refrigerant System Pressure Access Ports  . . . . . . . 6
PURON® (R-410A) REFRIGERANT. . . . . . . . . . . . . . . 6
Refrigerant Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Evacuation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Compressors  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Condenser-Fan Adjustment  . . . . . . . . . . . . . . . . . . . 13
Troubleshooting Cooling System. . . . . . . . . . . . . . . 13
CONVENIENCE OUTLETS . . . . . . . . . . . . . . . . . . . . . 15
Wet in Use Convenience Outlet Cover . . . . . . . . . . . 15
Duty Cycle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Non-Powered Type. . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Unit-Powered Type. . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Fuse On Powered Type . . . . . . . . . . . . . . . . . . . . . . . 17
Using Unit-Mounted Convenience Outlets  . . . . . . . 17
SMOKE DETECTORS . . . . . . . . . . . . . . . . . . . . . . . . . 17
System  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Controller  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Smoke Detector Locations  . . . . . . . . . . . . . . . . . . . . 18
FIOP Smoke Detector Wiring and Response. . . . . . 19
Sensor and Controller Tests . . . . . . . . . . . . . . . . . . . 19
Controller Alarm Test Procedure . . . . . . . . . . . . . . . 20
Dirty Controller Test Procedure . . . . . . . . . . . . . . . . 20
Dirty Sensor Test Procedure. . . . . . . . . . . . . . . . . . . 20
Changing the Dirty Sensor Test . . . . . . . . . . . . . . . . 20
To Configure the Dirty Sensor Test Operation . . . . 20
SD-TRK4 Remote Alarm Test Procedure . . . . . . . . . 20
Detector Cleaning  . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Indicators  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Resetting Alarm and Trouble Condition Trips  . . . . 22
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
PROTECTIVE DEVICES . . . . . . . . . . . . . . . . . . . . . . . 22
Compressor Protection . . . . . . . . . . . . . . . . . . . . . . . 22
Supply (Indoor) Fan Motor Protection . . . . . . . . . . . 23
Condenser Fan Motor Protection . . . . . . . . . . . . . . . 23
Control Circuit, 24-V  . . . . . . . . . . . . . . . . . . . . . . . . . 23
ELECTRIC HEATERS . . . . . . . . . . . . . . . . . . . . . . . . . 23

Single Point Boxes and Supplementary Fuses . . . .24
Safety Devices  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Low-Voltage Control Connections  . . . . . . . . . . . . . .25
WIRING DIAGRAMS  . . . . . . . . . . . . . . . . . . . . . . . . . .25
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
START-UP, GENERAL  . . . . . . . . . . . . . . . . . . . . . . . .31
Unit Preparation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Return-Air Filters  . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Outdoor-Air Inlet Screens  . . . . . . . . . . . . . . . . . . . . .31
Compressor Mounting . . . . . . . . . . . . . . . . . . . . . . . .31
Internal Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Refrigerant Service Ports. . . . . . . . . . . . . . . . . . . . . .31
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . .32
Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Heating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Ventilation (Continuous Fan). . . . . . . . . . . . . . . . . . .32
RTU Open Control System. . . . . . . . . . . . . . . . . . . . .34
SYSTEMVU™ (FACTORY OPTION) . . . . . . . . . . . . . .34
Integrated Staging Control (ISC) Board . . . . . . . . . .34
EconoMi$er® X (Factory Option)  . . . . . . . . . . . . . . .36
Staged Air Volume (SAV™) with Variable Frequency

Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Multi-Speed VFD Display Kit (Field-Installed

Option). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

FASTENER TORQUE VALUES. . . . . . . . . . . . . . . . . .62
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . .62
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Economizer (Optional) . . . . . . . . . . . . . . . . . . . . . . . .63
Low Ambient Cooling Operation down to 40°F

(4°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Heating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
6APPENDIX A — MODEL NUMBER

NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . .64

APPENDIX B — PHYSICAL DATA . . . . . . . . . . . . . . .65
APPENDIX C — FAN PERFORMANCE . . . . . . . . . . .72
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . .CL-1

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be

hazardous due to system pressure and electrical components. Only

trained and qualified service personnel should install, repair, or

service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of

cleaning coils and filters and replacing filters. All other operations

should be performed by trained service personnel. When working

on air-conditioning equipment, observe precautions in the

literature, tags and labels attached to the unit, and other safety

precautions that may apply.

WeatherExpert

®

50LC*D14-D26

Single Package Rooftop Cooling Only

with Puron

®

(R-410A) Refrigerant

1
2
3
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Summary of Contents for 50LC 14

Page 1: ...r Protection 23 Condenser Fan Motor Protection 23 Control Circuit 24 V 23 ELECTRIC HEATERS 23 Single Point Boxes and Supplementary Fuses 24 Safety Devices 24 Low Voltage Control Connections 25 WIRING...

Page 2: ...n motor mounting bolts tightness Compressor mounting bolts Condenser fan blade positioning Control box cleanliness and wiring condition Wire terminal tightness Refrigerant charge level Evaporator coil...

Page 3: ...fixed pitch driven fan pulley is attached to the fan shaft and an adjustable pitch driver pulley is mounted on the motor The pulleys are connected using a V type belt See Fig 4 Fig 4 Belt Drive Motor...

Page 4: ...or flat of pulley hub and tighten setscrew to torque specifications Torque pul ley set screw to 72 5 in lbs To align fan and motor pulleys 1 Loosen fan pulley setscrews 2 Slide fan pulley along fan sh...

Page 5: ...part of the unit s regularly scheduled maintenance procedures to ensure long life of the coil Failure to clean the coils may result in reduced durability in the environment Avoid the use of coil brigh...

Page 6: ...vided in pink rose colored cylinders These cylinders are available with and without dip tubes cylinders with dip tubes will have a label indicating this feature For a cylinder with a dip tube place th...

Page 7: ...nd low side ports Never use the system compressor as a vacuum pump Refrigerant tubes and indoor coil should be evacuated to 500 microns Always break a vacuum with dry ni trogen The two possible method...

Page 8: ...600 650 s e e r g e D e r u t a r e p m e T g n i v a e L l i o C r o o d t u O F C Compressor Discharge Pressure psig Kpa 50LC500756 REV B Remove charge if below the curve Standard Unit Standard Unit...

Page 9: ...0 600 650 s e e r g e D e r u t a r e p m e T g n i v a e L l i o C r o o d t u O F C Compressor Discharge Pressure psig Kpa 50LC500757 REV B Standard Unit Standard Unit with Humidi MiZer For Standard...

Page 10: ...0 400 450 500 550 600 650 Outdoor Coil Leaving Temperature Degrees F C Compressor Discharge Pressure psig Kpa 50LC500758 REV B Remove charge if below the curve Standard Unit Standard Unit w Humidi MiZ...

Page 11: ...600 650 s e e r g e D e r u t a r e p m e T g n i v a e L l i o C r o o d t u O F C Compressor Discharge Pressure psig Kpa 50LC500759 REV B Remove charge if below the curve Standard Unit Standard Unit...

Page 12: ...600 650 s e e r g e D e r u t a r e p m e T g n i v a e L l i o C r o o d t u O F C Compressor Discharge Pressure psig Kpa 50LC500760 REV B Remove charge if below the curve Standard Unit Standard Uni...

Page 13: ...es to suction and discharge pressure 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 NOTE If the suction pres...

Page 14: ...striction and remove Compressor Operates Continuously Dirty air filter Replace filter Unit undersized for load Decrease load or increase unit size Thermostat set too low Reset thermostat Low refrigera...

Page 15: ...125 v power supply conductors into the bottom of the utility box containing the duplex receptacle Unit Powered Type A unit mounted transformer is factory installed to stepdown the main power supply vo...

Page 16: ...d Convenience Outlet Wiring UNIT VOLTAGE CONNECT AS PRIMARY CONNECTIONS TRANSFORMER TERMINALS 208 230 240 L1 RED YEL L2 BLU GRA H1 H3 H2 H4 460 480 L1 RED Splice BLU YEL L2 GRA H1 H2 H3 H4 575 600 L1...

Page 17: ...rooftop unit in order to pre vent smoke from circulating throughout the building It is not to be used as a life saving device Controller The controller includes a controller housing a printed circuit...

Page 18: ...ule is mounted in the left side of the control box accessed by opening the Control Box access door Fig 21 Typical Supply Air Smoke Detector Sensor Location RETURN AIR WITHOUT ECONOMIZER The sampling t...

Page 19: ...LARM TEST The sensor alarm test checks a sensor s ability to signal an alarm state This test requires that use of a field provided SD MAG test magnet SENSOR ALARM TEST PROCEDURE 1 Hold the test magnet...

Page 20: ...test reset station s abili ty to initiate and indicate an alarm state SD TRK4 Remote Alarm Test Procedure 1 Turn the key switch to the RESET TEST position for seven seconds 2 Verify that the test rese...

Page 21: ...ERT can result in an unnecessary evacuation of the facility If the smoke detector is connected to a fire alarm system first notify the proper authorities that the detector is under going maintenance t...

Page 22: ...TROUBLE LED IS ON 1 Check the Trouble LED on each sensor connected to the controller If a sensor s Trouble LED is on determine the cause and make the necessary repairs 2 Check the wiring between the s...

Page 23: ...values are listed on the side of the External Overload Breaker TROUBLESHOOTING SUPPLY FAN MOTOR OVER LOAD TRIPS The supply fan used in 50LC units is a forward curved centrif ugal wheel At a constant w...

Page 24: ...8 230 v applications use UL Class RK5 250 v fuses Bussman FRNR 60 or Shawmut TR 60R Single point boxes for 460 v and 575 v applications use UL Class T 600 v fuses Bussman JJS 60 or Shawmut A6T 60 Note...

Page 25: ...g 34 38 for typical wiring diagrams RED HI TEMP FEED WIRES THRU STRAIN RELIEF BUSHING IN CONTROL PANEL INSULATED TERMINALS AT LIMITS HTR 1 BLUE 12 GA BLUE 12 GA YELLOW 12 GA YELLOW 12 GA BLACK 12 GA R...

Page 26: ...26 Fig 34 50LC 14 26 Control Wiring Diagram...

Page 27: ...27 Fig 35 50LC 14 26 RTU Open Control Wiring Diagram...

Page 28: ...28 Fig 36 50LC 14 20 208 230V 3 Phase Power Wiring Diagram...

Page 29: ...29 Fig 37 50LC 24 26 208 230V 3 Phase Power Wiring Diagram...

Page 30: ...30 Fig 38 50LC 14 26 460V 575V 3 Phase Power Wiring Diagram...

Page 31: ...line and one on the compressor discharge line These Schrader valves use black plastic caps with an O ring inside the cap Should this O ring be blown or fall out refrigerant may leak out of Schrader po...

Page 32: ...o provide constant air circulation FIELD CONTROL WIRING The 50LC size 14 26 units require an external temperature control device such as a thermostat field supplied THERMOSTAT Install a Carrier approv...

Page 33: ...field installed electric heaters The heaters are modular in design Heater modules are installed in the compartment below the in door blower access panel Access is through the electric heat access pan...

Page 34: ...the RTU Open option the RTU Open controller provides the signal which is passed through the ISC board to the Smoke Alarm terminal The crankcase heater will run at all times except when the compressor...

Page 35: ...d air tem perature to drop below 45 F 7 C the outdoor air damper will return to the minimum position If the mixed air temperature continues to fall the outdoor air damper will close Control re turns t...

Page 36: ...Module The W7220 economizer module can be used as a stand alone economizer module wired directly to a commercial set back space thermostat and sensors to provide outside air dry bulb economizer contro...

Page 37: ...C Temperature accuracy 0 F 2 F 18 C 17 C Humidity range 0 to 100 RH with 5 accuracy NOTE Up to three 3 S Bus sensors may be connected to the W7220 economizer module for outdoor air OA return air RA an...

Page 38: ...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 e g CO2 sensor IAQ COM COM Air Quality Sensor Co...

Page 39: ...button causes the display to automatically increment or decrement 1 Press the Enter button to accept the displayed value and store it in nonvolatile RAM CHANGE STORED displays 2 Press the Enter butto...

Page 40: ...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...

Page 41: ...alpy curves DCV SET 1100ppm 500 to 2000 ppm increment by 100 DEMAND CONTROLLED VENTILATION Displays only if CO2 sensor is connected Set point for Demand Controlled Ventilation of space Above the set p...

Page 42: ...out for second exhaust fan SYS use output as an alarm signal OCC INPUT INPUT or ALWAYS OCCUPIED MODE BY EXTERNAL SIGNAL When using a setback thermostat with occupancy out 24 vac the 24 vac is input I...

Page 43: ...e fully closed position CONNECT Y1 O N A N A Closes the Y1 O relay Y1 O CONNECT Y2 O N A N A Closes the Y2 O relay Y2 O CONNECT AUX1 O N A N A Energizes the AUX output If Aux setting is NONE no action...

Page 44: ...operation with a 2 speed indoor fan with or without DCV see Tables 17 and 18 For enthalpy operation with a 2 speed indoor fan with or with out DCV see Tables 19 and 20 ALARMS cont FREEZE ALARM N A N...

Page 45: ...NTILATION DCV OUTSIDE AIR GOOD TO ECONOMIZE Y1 I Y2 I FAN SPEED Y1 O Y2 O OCCUPIED UNOCCUPIED Below CO2 set No Off Off High 0 v Off 0 v Off VENTMIN Closed On Off High 24 v On 0 v Off VENTMIN Closed On...

Page 46: ...UPIED UNOCCUPIED Below CO2 set No Off Off High 0 v Off 0 v Off VENTMIN Closed On Off High 24 v On 0 v Off VENTMIN Closed On On High 24 v On 24 v On VENTMIN Closed Yes Off Off High 0 v Off 0 v Off VENT...

Page 47: ...Y2 I FAN SPEED Y1 O Y2 O OCCUPIED UNOCCUPIED Below CO2 Set No OFF OFF LOW 0v Off 0v Off VENTMIN Closed ON OFF LOW 24v On 0v Off VENTMIN Closed ON ON HIGH 24v On 24v On VENTMIN Closed Yes OFF OFF LOW...

Page 48: ...the supply fan and controls the OA damper to the required position see Table 21 The W heating mode is not controlled by the W7220 but it re quires the status to know where to position the OA damper fo...

Page 49: ...in the Checkout menu using the and buttons 2 Press the Enter button to select the item RUN appears 3 Press the Enter button to start the test The unit pauses and then displays IN PROGRESS When the tes...

Page 50: ...played within 5 seconds Staged Air Volume SAV with Variable Fre quency Drive The Staged Air Volume SAV system utilizes a Variable Fre quency Drive VFD to automatically adjust the indoor fan mo tor spe...

Page 51: ...56 VFD Keypad 230V 460V 575V ONLY 1 Parameter number and name 2 Parameter value 3 Setup number shows the active setup and the edit setup If the same set up acts as both the active and edit set up onl...

Page 52: ...ecure the cable to the VFD 2 Connect the female end of the cable to the back panel of the VFD Remote keypad Secure the cable to the remote keypad using the 2 remaining screws from the kit 1 Com LED Fl...

Page 53: ...display changes to d With the top row highlighted press OK The display changes to NOTE If English is not the desired language press OK select the desired language and press OK again e Press Down Arrow...

Page 54: ...ow keys to select the nameplate voltage Press OK again to set the selected voltage i Press Down Arrow once to display the following j Press OK to highlight the Frequency value and then use the and Up...

Page 55: ...ng display appears NOTE If the bottom row displays a number other than 0 000 press OK and use the and Up and Down Arrow key to select 0 000 e Press Down Arrow once the following display appears NOTE I...

Page 56: ...o enter the required values 10 Setting Digital Inputs a Press the Back key until the following display appears b Press Down Arrow once the following display appears c Press OK the following display ap...

Page 57: ...ges to h Press Down Arrow once the following display appears i Press OK to highlight the number of seconds and use the and Up and Down Arrow keys to select 600 seconds Press OK again to set the select...

Page 58: ...4 3 10 5 3 10 6 3 10 7 STD 208 230V 2 0 1 1 0 4 0 53 43 79 57 100 100 0 0 0 460V 2 0 1 1 0 4 0 53 43 79 57 100 100 0 0 0 575V 2 0 1 1 0 4 0 53 43 79 57 100 100 0 0 0 MID 208 230V 2 0 1 1 0 4 0 53 43 7...

Page 59: ...4 3 10 5 3 10 6 3 10 7 STD 208 230V 2 0 1 1 0 4 0 56 64 82 40 100 100 0 0 0 460V 2 0 1 1 0 4 0 56 64 82 40 100 100 0 0 0 575V 2 0 1 1 0 4 0 56 64 82 40 100 100 0 0 0 MID 208 230V 2 0 1 1 0 4 0 56 64...

Page 60: ...4 3 10 5 3 10 6 3 10 7 STD 208 230V 2 0 1 1 0 4 0 52 57 61 63 100 100 0 0 0 460V 2 0 1 1 0 4 0 52 57 61 63 100 100 0 0 0 575V 2 0 1 1 0 4 0 52 57 61 63 100 100 0 0 0 MID 208 230V 2 0 1 1 0 4 0 52 57...

Page 61: ...4 3 10 5 3 10 6 3 10 7 STD 208 230V 2 0 1 1 0 4 0 52 33 64 48 100 100 0 0 0 460V 2 0 1 1 0 4 0 52 33 64 48 100 100 0 0 0 575V 2 0 1 1 0 4 0 52 33 64 48 100 100 0 0 0 MID 208 230V 2 0 1 1 0 4 0 52 33...

Page 62: ...1L9800 1 102 16 230 60 37 3 1755 460V HD64FK654 HK30WA386 131L9869 1 122 16 460 60 16 9 1755 575V HD64FL576 HK30WA388 131N0233 1 132 16 575 60 12 6 1755 Start Delay Sec Flying Start Min Speed for Func...

Page 63: ...ll be propor tionally closed For economizer operation there must be a ther mostat call for the fan G If the unit is occupied and the fan is on the damper will operate at minimum position Otherwise the...

Page 64: ...l Cu E coat Al Cu E Cu Cu Al Cu F Cu Cu Cu Cu M Al Cu Al Cu Louvered Hail Guard N Precoat Al Cu Al Cu Louvered Hail Guard P E coat Al Cu Al Cu Louvered Hail Guard Q E coat Al Cu E coat Al Cu Louvered...

Page 65: ...al Fan Diameter in 15x15 15x15 15x15 15x15 15x15 15x15 15x15 15x15 15x15 15x15 Medium Static Motor Qty Drive Type 1 Belt 1 Belt 1 Belt 1 Belt 1 Belt Max BHP 4 9 7 4 7 4 7 4 9 9 RPM range 682 861 651 8...

Page 66: ...5T N A Fan Qty Type 2 Centrifugal 2 Centrifugal 2 Centrifugal 2 Centrifugal N A Fan Diameter in 18x15 15x11 18x15 15x11 18x15 15x11 18x15 15x11 N A COND COIL 1 Material Cu Al Cu Al Cu Al Cu Al Cu Al C...

Page 67: ...9 056 056 056 056 HIGH 302 305A00 15 0 11 3 13 8 279 270A00 25 0 18 8 23 0 309 312A00 50 0 37 6 45 9 056 056 056 056 ULTRA HIGH 302 305A00 15 0 11 3 13 8 279 270A00 25 0 18 8 23 0 056 309 312A00 50 0...

Page 68: ...45 9 056 056 056 056 281 272A00 75 0 56 3 68 9 056 056 056 056 ULTRA HIGH 279 270A00 25 0 18 8 23 0 056 056 056 280 271A00 50 0 37 6 45 9 056 056 056 056 281 272A00 75 0 56 3 68 9 056 056 056 056 460...

Page 69: ...9 056 056 056 056 281 272A00 75 0 56 3 68 9 056 056 056 056 ULTRA HIGH 279 270A00 25 0 18 8 23 0 056 056 056 280 271A00 50 0 37 6 45 9 056 056 056 056 281 272A00 75 0 56 3 68 9 056 056 056 056 460 3...

Page 70: ...81 272A00 75 0 56 3 68 9 056 056 056 056 ULTRA HIGH 279 270A00 25 0 18 8 23 0 056 056 056 056 280 271A00 50 0 37 6 45 9 056 056 056 056 281 272A00 75 0 56 3 68 9 056 056 056 056 460 3 60 STD 282 273A0...

Page 71: ...80 271A00 50 0 37 6 45 9 056 056 056 056 281 272A00 75 0 56 3 68 9 056 056 056 056 HIGH 279 270A00 25 0 18 8 23 0 056 056 056 056 280 271A00 50 0 37 6 45 9 056 056 056 056 281 272A00 75 0 56 3 68 9 05...

Page 72: ...on on the electrical properties of Carrier motors please see the Electrical information section of this book 6 For more information on the performance limits of Carrier motors see the application data...

Page 73: ...859 2 54 912 2 85 963 3 17 1010 3 49 1055 3 81 5938 870 2 75 923 3 09 973 3 42 1020 3 76 1065 4 10 6250 881 2 99 934 3 34 983 3 69 1030 4 04 1075 4 39 STD Static 498 676 rpm 2 9 Max BHP MID Static 68...

Page 74: ...5 07 6750 891 3 67 942 4 12 989 4 56 1033 5 01 1076 5 46 7125 904 3 98 956 4 46 1003 4 94 1047 5 41 1090 5 88 7500 917 4 31 970 4 83 1017 5 33 1062 5 83 1104 6 32 STD Static 498 676 rpm 2 9 Max BHP MI...

Page 75: ...3 44 869 4 05 8313 675 2 64 707 2 88 752 3 24 814 3 77 881 4 40 8750 707 3 06 737 3 30 776 3 64 830 4 13 893 4 77 CFM Available External Static Pressure in wg 1 2 1 4 1 6 1 8 2 0 RPM BHP RPM BHP RPM B...

Page 76: ...6 93 8313 746 4 49 794 5 19 841 5 96 887 6 78 931 7 64 8750 780 5 16 826 5 89 871 6 68 915 7 53 958 8 41 CFM Available External Static Pressure in wg 1 2 1 4 1 6 1 8 2 0 RPM BHP RPM BHP RPM BHP RPM B...

Page 77: ...4 99 9 500 764 3 87 789 4 12 822 4 44 864 4 88 917 5 47 10 000 802 4 50 825 4 74 854 5 05 891 5 47 937 6 03 CFM Available External Static Pressure in wg 1 2 1 4 1 6 1 8 2 0 RPM BHP RPM BHP RPM BHP RP...

Page 78: ...889 7 13 932 7 98 974 8 88 9 500 839 6 46 882 7 25 924 8 08 965 8 97 1005 9 90 10 000 879 7 45 919 8 27 960 9 14 999 10 05 1038 11 01 CFM Available External Static Pressure in wg 1 2 1 4 1 6 1 8 2 0 R...

Page 79: ...9 563 769 3 95 794 4 19 826 4 51 867 4 95 919 5 54 10 125 811 4 66 834 4 91 862 5 22 898 5 63 942 6 18 10 688 854 5 46 875 5 71 900 6 01 931 6 41 969 6 92 11 250 897 6 34 917 6 59 939 6 90 967 7 28 10...

Page 80: ...58 886 7 37 928 8 21 969 9 10 1009 10 03 10 125 889 7 72 929 8 54 969 9 42 1008 10 34 1046 11 30 10 688 933 8 98 972 9 84 1010 10 75 1047 11 71 1083 12 71 11 250 979 10 38 1015 11 28 1051 12 22 1087 1...

Page 81: ...29 915 901 887 873 859 846 832 818 804 High Static 1190 1170 1150 1130 1109 1089 1069 1049 1029 1009 988 968 948 Factory setting UNIT SIZE MOTOR DRIVE COMBO MOTOR PULLEY TURNS OPEN RPM 0 0 0 5 1 0 1 5...

Page 82: ...discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53500167 01 Printed in U S A Form 50LC 14 26 03SM Pg 82 2 2020 Replaces 50LC...

Page 83: ...als 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...

Page 84: ...at contacts 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 _______...

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