Carrier WeatherMaker 50TC 17-30 Series Service And Maintenance Instructions
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Carrier WeatherMaker 50TC 17-30 Series Service And Maintenance Instructions

Carrier WeatherMaker 50TC 17-30 Series Service And Maintenance Instructions

Single package rooftop unit with electric cooling and optional electric heat with puron (r-410a) refrigerant
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Service and Maintenance Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 2
UNIT ARRANGEMENT AND ACCESS . . . . . . . . . . . . 2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 3
Seasonal Maintenance . . . . . . . . . . . . . . . . . . . . . . . . 3
SUPPLY FAN (BLOWER) SECTION . . . . . . . . . . . . . . 4
Supply Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 4
DRIVE (VFD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Identifying Factory Option . . . . . . . . . . . . . . . . . . . . . 6
Unit Installation with SAV Option . . . . . . . . . . . . . . . 6
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . 6
MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Replacing the Motor . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Pulleys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
CONDENSER COIL SERVICE . . . . . . . . . . . . . . . . . . . 8
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
EVAPORATOR COILS . . . . . . . . . . . . . . . . . . . . . . . . . 9
SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Humidi-MiZer System Components . . . . . . . . . . . . 11
Operating Sequences . . . . . . . . . . . . . . . . . . . . . . . . 11
Humidi-MiZer Modes . . . . . . . . . . . . . . . . . . . . . . . . . 12
TXV Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
PURON (R-410A) REFRIGERANT . . . . . . . . . . . . . . 18
Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Using the Cooling Charging Charts . . . . . . . . . . . . 18
COOLING CHARGING CHARTS . . . . . . . . . . . . . . . . 19
COMPRESSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Replacing the Compressor . . . . . . . . . . . . . . . . . . . 23
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . 23
Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Adjusting the Condenser-Fan . . . . . . . . . . . . . . . . . 23
CONVENIENCE OUTLETS . . . . . . . . . . . . . . . . . . . . 25
Non-Powered Type . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Unit-Powered Type . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500227-01
with Electric Cooling and Optional Electric Heat
Printed in U.S.A.
Form 50TC-17-30-02SM
WeatherMaker
Single Package Rooftop Unit
with Puron® (R-410A) Refrigerant
Wet in Use Convenience Outlet Cover . . . . . . . . . . .25
GFCI Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Fuse On Powered Type . . . . . . . . . . . . . . . . . . . . . . .26
Installing a Weatherproof Cover . . . . . . . . . . . . . . . .26
SMOKE DETECTORS . . . . . . . . . . . . . . . . . . . . . . . . .26
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Smoke Detector Locations . . . . . . . . . . . . . . . . . . . .27
Sensor and Controller Tests . . . . . . . . . . . . . . . . . . . 29
Detector Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . .30
INDICATORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Normal State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Alarm State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
PROTECTIVE DEVICES . . . . . . . . . . . . . . . . . . . . . . .32
Compressor Protection . . . . . . . . . . . . . . . . . . . . . . .32
Control Circuit, 24v . . . . . . . . . . . . . . . . . . . . . . . . . .33
PremierLink™ Control . . . . . . . . . . . . . . . . . . . . . . . .33
RTU Open Control System . . . . . . . . . . . . . . . . . . . .33
ECONOMI$ER SYSTEMS . . . . . . . . . . . . . . . . . . . . . .33
EconoMi$er IV Standard Sensors . . . . . . . . . . . . . .37
EconoMi$er® X (Factory Option) . . . . . . . . . . . . . . .42
PRE-START-UP/START-UP . . . . . . . . . . . . . . . . . . . .56
START-UP, GENERAL . . . . . . . . . . . . . . . . . . . . . . . .56
Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Additional Installation/Inspection . . . . . . . . . . . . . .56
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Outdoor-Air Inlet Screens . . . . . . . . . . . . . . . . . . . . .56
Compressor Mounting . . . . . . . . . . . . . . . . . . . . . . . .57
Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Refrigerant Service Ports . . . . . . . . . . . . . . . . . . . . . 57
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . .57
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Ventilation (Continuous Fan) . . . . . . . . . . . . . . . . . .57
START-UP, PREMIERLINK CONTROLS . . . . . . . . . .57
START-UP, RTU-OPEN CONTROLS . . . . . . . . . . . . .57
FASTENER TORQUE VALUES . . . . . . . . . . . . . . . . .57
APPENDIX A - MODEL NUMBER
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . .58
APPENDIX B - PHYSICAL DATA . . . . . . . . . . . . . . .60
APPENDIX C - FAN PERFORMANCE . . . . . . . . . . .69
APPENDIX D - WIRING DIAGRAMS . . . . . . . . . . . .79
LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . .CL-1
Pg 1
50TC**17-30
®
1-21
Replaces: 50TC-17-30-01SM

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Summary of Contents for Carrier WeatherMaker 50TC 17-30 Series

  • Page 1: Table Of Contents

    WeatherMaker 50TC**17-30 ® Single Package Rooftop Unit with Electric Cooling and Optional Electric Heat with Puron® (R-410A) Refrigerant Service and Maintenance Instructions CONTENTS Wet in Use Convenience Outlet Cover ...25 GFCI Maintenance .

  • Page 2: Safety Considerations

    SAFETY CONSIDERATIONS WARNING Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only UNIT OPERATION AND SAFETY HAZARD trained and qualified service personnel should install, repair, or service air-conditioning equipment. Failure to follow this warning could cause personal injury, death and/or equipment damage.

  • Page 3: Routine Maintenance

    • Evaporator coil cleaning SUPPLY FAN OUTDOOR • Evaporator blower motor amperage HEATING SECTION FANS/MOTORS OUTDOOR AIR HOOD HEATING • Heat exchanger flue passageways cleanliness • Gas burner condition • Gas manifold pressure • Heating temperature rise ECONOMIZER OR OUTSIDE AIR DAMPER •...

  • Page 4: Supply Fan (Blower) Section

    VERTICAL SUPPLY MODELS The two fan wheels used on the vertical supply models are the same: 15-in. diameter x 15-in. width. This arrangement provides uniform airflow distribution across the width of the evaporator coil, electric heater, and into the supply duct. HORIZONTAL SUPPLY MODELS The horizontal supply models have two different fan wheel sizes on a single shaft.
  • Page 5 Adjusting the Belt Tension STRAIGHTEDGE Use the following steps to adjust the V-belt tension. See Fig. 6. Loosen the four motor mounting nuts that attach the motor to BROWNING BELT the blower rail. TENSION CHECKER Loosen the two jack bolt locking nuts beneath the motor 1/2”...

  • Page 6: Staged Air Volume (Sav) Control: 2-Speed Fan With Variable Frequency Drive (Vfd)

    Increasing fan speed increases load on the motor. Do not heating operation. Conforming to ASHRAE 90.1 2010 Standard Section 6.4.3.10.b, during the first stage of cooling operation the exceed maximum speed specified in the Product Data or SAV system will adjust the fan motor to provide 66% of the de- motor amperage listed on the unit rating plate.

  • Page 7: Replacing The Motor

    18. On one bolt, place a new external-tooth lock washer between the motor and motor mounting band. BLOWER PULLEY 19. Make sure the teeth of the external-tooth lock washer make V-BELT contact with the painted base of the motor. This washer is MOTOR PULLEY essential for properly grounding the motor.

  • Page 8: Condenser Coil Service

    This cleaner is avail- able from Carrier Replacement Components Division as P/N: To determine variable pitch pulley diameter, perform the follow- P902-0301 for a one-gallon (3.8L) container, and P902-0305 for a ing calculation: 5-gallon (18.9L) container.

  • Page 9: Evaporator Coils

    Monthly cleaning with Totaline environmentally sound coil clean- er is essential to extend the life of the coils. This cleaner is avail- able from Carrier Replacement Parts Division (P/N: P902-0301 for a one-gallon (3.8L) container, and P/N: P902-0305 for a 5-gal- lon (18.9L) container).

  • Page 10: Refrigerant System Pressure Access Ports

    Interior and exterior finned areas must be thoroughly cleaned. 10. Finned surfaces should remain wet with cleaning solution for CAUTION 10 minutes. PERSONAL INJURY HAZARD 11. Make sure surfaces are not allowed to dry before rinsing. Failure to follow this caution can result in severe personal inju- Reapply cleaner as needed to ensure 10 minute saturation is ry and reduced unit performance.

  • Page 11: Humidi-Mizer® Adaptive Dehumidification

    SEAT CORE (Part No. EC39EZ067) 1/2-20 UNF RH 0.596 45° 30° WASHER DEPRESSOR PER AHRI 720 O-RING 1/2” HEX +.01/-.035 5/8” HEX 0.47 FROM FACE OF BODY This surface provides a metal to metal seal when 7/16-20 UNF RH torqued into the seat. Appropriate handling is required to not scratch or dent the surface.

  • Page 12: Humidi-Mizer Modes

    When there is only a single cooling demand (thermostat Y1 alone Once the humidity requirement is met, the unit can continue to op- or with thermostat Y2), one or both circuits will operate in Re- erate in normal cooling mode to meet any remaining sensible ca- heat2 mode.
  • Page 13 RH2.x VALVE RH1.x VALVE HUMIDI-MIZER COIL CONDENSER COIL OUTDOOR AIR COMPRESSOR VALVE EVAPORATOR COIL = CLOSED VALVE INDOOR AIR = OPEN VALVE = 3-WAY VALVE Fig. 19 — Subcooling Mode (Reheat 1) – Humidi-MiZer System RH2.x VALVE RH1.x VALVE HUMIDI-MIZER COIL CONDENSER COIL OUTDOOR AIR COMPRESSOR...
  • Page 14 Table 2 — Humidi-MiZer Reheat Control Board I/O CONNECTION PIN POINT NAME TYPE UNIT CONNECTION NOTE NUMBER Humidistat/LTLO DI, 24VAC J1A - 1 (1) LTLO Thermostat W1 DI, 24VAC J1A - 2 (2) CTB - REHEAT - 4 Econ Y1 DI, 24VAC J1A - 6 (6) CTB - REHEAT - 5...
  • Page 15 Table 4 — Humidi-MiZer Troubleshooting PROBLEM CAUSE REMEDY General cooling mode problem See Cooling Service Troubleshooting (Table 5). No dehumidification demand See No Dehumidification Demand, below. Subcooling Reheat Mode Will Not Activate CRC relay operation See CRC Relay Operation, below. Circuit RLV, CLV or LDV valve problem See CLV, RLV or LDV Valve Operation, below.

  • Page 16: Thermostatic Expansion Valve (Txv)

    See Fig. 22 side of the diaphragm. and 23. The needle valve on the pin carrier is spring loaded, exert- 11. Route the equalizer tube through the suction connection ing pressure on the underside of the diaphragm. Therefore,...

  • Page 17: Refrigerant System Pressure Access Ports

    CLAMP TXV SENSOR TXV SENSOR BULBS BULB CIRCUIT 2 SENSOR BULBS (CIRCUIT 2) CIRCUIT 1 (CIRCUIT 1) Fig. 22 — TXV Sensor Bulb Locations Refrigerant System Pressure Access Ports CAPILLARY TUBE EQUALIZER TUBE There are two access ports in the system: on the suction tube near TO TXV FROM TXV VALVE the compressor, and on the discharge tube near the compressor.

  • Page 18: Puron (R-410A) Refrigerant

    If the system continues to rise above 1100 microns, then the sys- PURON (R-410A) REFRIGERANT tem has a leak and should be pressurized and leak tested using ap- This unit is designed for use with Puron (R-410A) refrigerant. Do propriate techniques as explained in GTAC2-5. After evacuating not use any other refrigerant in this system.

  • Page 19: Cooling Charging Charts

    COOLING CHARGING CHARTS COOLING CHARGING CHART 15 and 17.5 Ton - Circuit A 115F / 46.1C 185.0 105F / 40.6C 175.0 95F / 35.0C 85F / 29.4C 165.0 75F / 23.9C 65F / 18.3C 155.0 55F / 12.8C 45F / 7.2C 145.0 135.0 125.0...
  • Page 20 COOLING CHARGING CHART 20 Ton - Circuit A 115F / 46.1C 185.0 105F / 40.6C 175.0 95F / 35.0C 85F / 29.4C 165.0 75F / 23.9C 65F / 18.3C 155.0 55F / 12.8C 45F / 7.2C 145.0 135.0 125.0 115.0 105.0 95.0 85.0...
  • Page 21 COOLING CHARGING CHART 25.0 Ton - Circuit A 115F / 46.1C 180.0 105F / 40.6C 95F / 35.0C 170.0 85F / 29.4C 75F / 23.9C 160.0 65F / 18.3C 55F / 12.8C 150.0 45F / 7.2C 140.0 130.0 120.0 110.0 100.0 90.0 80.0...
  • Page 22 COOLING CHARGING CHART 27.5 Ton - Circuit A Fig. 30 — Cooling Charging Chart - 27.5 Ton (Circuit A) COOLING CHARGING CHART 27.5 Ton - Circuit B Fig. 31 — Cooling Charging Chart - 27.5 Ton (Circuit B)

  • Page 23: Compressors

    COMPRESSORS Compressor Rotation On 3-phase units with scroll compressors, it is important to be Lubrication certain the compressor is rotating in the proper direction. To de- The compressor is charged with the correct amount of oil at the termine whether or not the compressor is rotating in the proper factory.

  • Page 24: Troubleshooting The Cooling System

    TROUBLESHOOTING THE COOLING SYSTEM Refer to Table 5 for additional troubleshooting topics. Table 5 — Cooling Service Troubleshooting PROBLEM CAUSE REMEDY Power failure. Call power company. Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. Defective thermostat, contactor, transformer, or Replace defective component.

  • Page 25: Convenience Outlets

    service power to the unit when the unit disconnect switch or cir- CONVENIENCE OUTLETS cuit breaker is open. Other connection methods will result in the convenience outlet circuit being de-energized when the unit dis- connect or circuit breaker is open. See Fig. 34. WARNING ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal injury or...

  • Page 26: Fuse On Powered Type

    Repair ground wire connections as needed and correct the GFCI RECEPTACLE line phasing. NOT INCLUDED COVER - WHILE-IN-USE Press RESET button to clear the tripped condition. WEATHERPROOF Fuse On Powered Type The factory fuse is a Bussmann “Fusetron” T-15, non-renewable screw-in (Edison base) type plug fuse.

  • Page 27: Sensor

    DUCT SMOKE SENSOR CONTROLLER EXHAUST TUBE DUCT SMOKE SENSOR EXHAUST GASKET SENSOR HOUSING CONDUIT NUTS AND ELECTRONICS (SUPPLIED BY INSTALLER) SEE DETAIL INTAKE GASKET CONDUIT SUPPORT PLATE CONTROLLER HOUSING TERMINAL BLOCK COVER COVER GASKET AND ELECTRONICS (ORDERING OPTION) COVER GASKET (ORDERING OPTION) TSD-CO2 (ORDERING OPTION)

  • Page 28: Fiop Smoke Detector Wiring And Response

    FIOP Smoke Detector Wiring and Response RETURN AIR ALL UNITS DETECTOR MODULE (Shipping position The FIOP smoke detector is configured to automatically shut shown)* down all unit operations when a smoke condition is detected. See Fig. 41 for smoke detector wiring. CONTROLLER HIGHLIGHT A MODULE...

  • Page 29: Sensor And Controller Tests

    48TM502525 Fig. 41 — Typical Smoke Detector System Wiring Sensor and Controller Tests Controller Alarm Test Procedure Press the controller’s test/reset switch for seven seconds. SENSOR ALARM TEST Verify that the controller’s Alarm LED turns on. The sensor alarm test checks a sensor’s ability to signal an alarm Reset the sensor by pressing the test/reset switch for two state.

  • Page 30: Detector Cleaning

    be wired to the controller as shown in Fig. 42 and configured to Table 6 — Dirty LED Test operate the controller’s supervision relay. For more information, see “Changing the Dirty Sensor Test.” FLASHES DESCRIPTION 0-25% dirty. (Typical of a newly installed detector) 25-50% dirty 51-75% dirty SMOKE DETECTOR...

  • Page 31: Indicators

    Using a vacuum cleaner, clean compressed air, or a soft bris- • The contacts on the controller’s alarm initiation relay close. tle brush, remove loose dirt and debris from inside the sensor housing and cover. Use isopropyl alcohol and a lint-free cloth •...

  • Page 32: Resetting Alarm And Trouble Condition Trips

    Resetting Alarm and Trouble Condition Trips PROTECTIVE DEVICES Manual reset is required to restore smoke detector systems to Nor- Compressor Protection mal operation. For installations using two sensors, the duct smoke detector does not differentiate which sensor signals an alarm or OVERCURRENT trouble condition.

  • Page 33: Control Circuit, 24V

    TROUBLESHOOTING SUPPLY FAN MOTOR OVER- ECONOMI$ER IV LOAD TRIPS CONTROLLER The supply fan used in 50TC units is a forward-curved centrifu- OUTSIDE AIR gal wheel. At a constant wheel speed, this wheel has a character- WIRING TEMPERATURE SENSOR HARNESS istic that causes the fan shaft load to DECREASE when the stat- LOW AMBIENT ic pressure in the unit-duct system increases and to INCREASE SENSOR...
  • Page 34 Fig. 48 — RTU Open Overlay for Economizer Wiring...
  • Page 35 Fig. 49 — VFD Overlay for W2770 Controller Wiring...
  • Page 36 FOR OCCUPANCY CONTROL REPLACE JUMPER WITH FIELD-SUPPLIED TIME CLOCK LEGEND Potentiometer Defaults Settings: Power Exhaust Middle — Demand Controlled Ventilation Minimum Pos. Fully Closed DCV Max. Middle — Indoor Air Quality DCV Set Middle — Low Ambient Lockout Device Enthalpy C Setting —...

  • Page 37: Economi$Er Iv Standard Sensors

    An outdoor-air temperature is used to determine when the EconoMi$er IV simulator program is available from Carrier to EconoMi$er IV system can be used for free cooling. The sensor is help with EconoMi$er IV system training and troubleshooting.
  • Page 38 SUPPLY AIR TEMPERATURE (SAT) SENSOR al accessories can be added to allow for different types of change- over control and operation of the EconoMi$er IV system and unit. The supply air temperature sensor is a 3 K thermistor located at the inlet of the indoor fan.
  • Page 39 turn the enthalpy setpoint potentiometer fully clockwise to the D setting. (See Fig. 55.) ECONOMI$ER IV CONTROLLER 24 Vac ECONOMI$ER IV Open GROMMET RETURN AIR Free SENSOR Cool RETURN DUCT (FIELD-PROVIDED) Fig. 57 — Return-Air Temperature or Enthalpy Sensor Mounting Location Fig.
  • Page 40 3. Ensure that the factory-installed jumper is in place across CO SENSOR MAX RANGE SETTING terminals P and P1. If remote damper positioning is being 6000 used, make sure that the terminals are wired according to Fig. 54 and that the minimum position potentiometer is 5000 turned fully clockwise.
  • Page 41 See Table 10. continue to the next variable. Use setting 1 or 2 for Carrier equipment. See Table 10. DEHUMIDIFICATION OF FRESH AIR WITH DCV 1. Press Clear and Mode buttons. Hold at least 5 seconds (DEMAND CONTROLLED VENTILATION) CONTROL until the sensor enters the Edit mode.

  • Page 42: Economi$Er® X (Factory Option)

    7. If connected, remove sensor from terminals SO and +. DCV MINIMUM AND MAXIMUM POSITION Connect 1.2 kilo-ohm 4074EJM checkout resistor across To check the DCV minimum and maximum position: terminals SO and +. 1. Make sure EconoMi$er IV preparation procedure has been 8.
  • Page 43 • Relay Digital Output Rating at 30 vac (maximum power from Class 2 input only) — 1.5A run: 3.5A inrush at 0.45PF (200,000 cycles) or 7.5A inrush at 0.45PF (100,000 cycles) • External Sensors Power Output — 21 vdc ± 5% at 48mA IMPORTANT: All inputs and outputs must be Class 2 wiring.
  • Page 44 NOTE: The four terminal blocks are removable. Slide out each Table 12 — Economizer Module terminal block, wire it, and then slide it back into place. (Right Hand Terminal Blocks) LABEL TYPE DESCRIPTION Top Right Terminal Blocks AUX2 I 24 vac IN The first terminal is not used.
  • Page 45 To use the keypad when working with menus: Table 13 — HH57AC081 Sensor Wiring Terminations • Press the ▲ (Up arrow) button to move to the previous menu. TERMINAL TYPE DESCRIPTION • Press the ▼ (Down arrow) button to move to the next NUMBER LABEL menu.
  • Page 46 NOTE: Some parameters in the menus use the letters MA or The setup process uses a hierarchical menu structure that is easy to MAT, indicating a mixed air temperature sensor location before use. Press the ▲ and ▼ arrow buttons to move forward and back- the cooling coil.
  • Page 47 Table 15 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † DEMAND CONTROLLED VENTILATION STATUS DCV STATUS — ON/OFF Displays ON if above set point and OFF if below set point, and ONLY if a CO sensor is connected.
  • Page 48 Table 15 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † DCV MINIMUM DAMPER POSITION 2 to 10 vdc or 100 Displays only if a CO sensor is connected. Used for Va to 9990 cfm (ventilation min cfm) set point.
  • Page 49 Table 15 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † COOLING STAGE 3 DELAY 0 min, 5 min, Delay after stage 2 cool has been active. Turns on second stage 15 min, then 15 min of cooling when economizer is first stage call and mechanical STG3 DLY...
  • Page 50 Table 15 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † RA SYLK T ERR — — RETURN AIR S-BUS SENSOR ERROR Return air enthalpy sensor has failed or become disconnected - RA SYLK H ERR —...
  • Page 51 Table 16 — Damper Minimum Position Settings and Readings on Checkout Menu DEMAND CONTROLLED VENTILATION FAN SPEED SETPOINTS CHECKOUT SENSOR) MIN POS VMAX–HS — — MIN POS H VMAX–HS MIN POS L VMAX–LS VENT MIN VMAX–HS VENT MAX VMAX–HS VENT MIN H VMAX–HS VENT MAX H VMAX–LS...
  • Page 52 Table 19 — Enthalpy Operation without DCV (CO Sensor) — 1 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I FAN SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED VENTILATION (DCV) ECONOMIZE High 0-v/Off 0-v/Off MIN POS Closed High 24-v/On 0-v/Off MIN POS Closed High 24-v/On...
  • Page 53 Table 22 — Dry Bulb Operation with DCV (CO Sensor) — 2 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE 0v/Off 0v/Off VENTMIN Closed 24v/On 0v/Off VENTMIN Closed HIGH 24v/On 24v/On VENTMIN Closed...
  • Page 54 Table 24 — Enthalpy Operation with DCV (CO Sensor) — 2 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE 0v/Off 0v/Off VENTMIN Closed 24v/On 0v/Off VENTMIN Closed HIGH 24v/On 24v/On VENTMIN Closed 0v/Off...
  • Page 55 ECONOMIZING DUAL ENTHALPY AVAILABLE HIGH LIMIT NOT AVAILABLE SINGLE ENTHALPY P2 (T,RH) (T,RH) TEMPERATURE Fig. 66 — Single Enthalpy Curve Boundaries Table 26 — Single Enthalpy and Dual Enthalpy High Limit Curves POINT P1 POINT P2 ENTHALPY TEMP. DRY TEMP. ENTHALPY HUMIDITY HUMIDITY...

  • Page 56: Pre-Start-Up/Start-Up

    If one or more alarms are present and there has been no keypad ac- Proceed as follows to inspect and prepare the unit for initial start- tivity for at least 5 minutes, the Alarms menu displays and cycles through the active alarms. Remove all access panels.

  • Page 57: Compressor Mounting

    To shut off unit, set system selector switch at OFF position. Reset- Compressor Mounting ting thermostat at a position above room temperature shuts unit off Compressors are internally spring mounted. Do not loosen or re- temporarily until space temperature exceeds thermostat setting. move compressor hold down bolts.

  • Page 58: Nomenclature

    APPENDIX A — MODEL NUMBER NOMENCLATURE Position: 9 10 11 12 13 14 15 16 17 18 Example: Unit Heat Type Packaging & Seismic Compliance 50 - Electric Heat 0 = Standard Packaged Rooftop 3 = California Seismic Compliant Electrical Options Model Series - WeatherMaker ®...
  • Page 59 APPENDIX A — MODEL NUMBER NOMENCLATURE Position: 9 10 11 12 13 14 15 16 17 18 Example: Unit Heat Type Packaging and Seismic Compliance 50 - Electric Heat Packaged Rooftop 0 = Standard Model Series - WeatherMaker ® Electrical Options TC - Standard Efficiency A = Non USA models –...

  • Page 60: Appendix B - Physical Data

    APPENDIX B — PHYSICAL DATA Table A — Physical Data - Vertical (Cooling) 15 To 25 Tons (Novation Coils) 50TC-D17 50TC-D20 50TC-D24 50TC-D28 REFRIGERATION SYSTEM MCHX MCHX MCHX MCHX # Circuits / # Comp. / Type 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll...
  • Page 61 APPENDIX B — PHYSICAL DATA Table A — Physical Data - Vertical (Cooling) 15 To 25 Tons (Novation Coils) (cont) 50TC-D17 50TC-D20 50TC-D24 50TC-D28 COND. COIL (CIRCUIT B) Coil type Novation Novation Novation Novation Coil length (in.) Coil height (in.) Rows / FPI 1 / 20.3 1 / 20.3...
  • Page 62 APPENDIX B — PHYSICAL DATA Table B — Physical Data - Vertical (Cooling) 15 To 17.5 Tons (RTPF Coils) 50TC-D17 50TC-E17 50TC-D20 50TC-E20 REFRIGERATION SYSTEM RTPF RTPF RTPF RTPF # Circuits / # Comp. / Type 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll...
  • Page 63 APPENDIX B — PHYSICAL DATA Table B — Physical Data - Vertical (Cooling) 15 To 17.5 Tons (RTPF Coils) (cont) 50TC-D17 50TC-E17 50TC-D20 50TC-E20 COND. COIL (CIRCUIT A) Coil type RTPF RTPF RTPF RTPF Coil length (in.) Coil height (in.) Rows / FPI 2 /17 2 /17...
  • Page 64 APPENDIX B — PHYSICAL DATA Table C — Physical Data - Vertical (Cooling) 20 to 27.5 Tons (RTPF Coils) 50TC-D24 50TC-E24 50TC-D28 50TC-E28 50TC-D30 REFRIGERATION SYSTEM RTPF RTPF RTPF RTPF RTPF # Circuits / # Comp. / Type 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll...
  • Page 65 APPENDIX B — PHYSICAL DATA Table C — Physical Data - Vertical (Cooling) 20 to 27.5 Tons (RTPF Coils) (cont) 50TC-D24 50TC-E24 50TC-D28 50TC-E28 50TC-D30 COND. COIL (CIRCUIT B) Coil type RTPF RTPF RTPF RTPF RTPF Coil length (in.) Coil height (in.) Rows / FPI 2 /17 2 /17...
  • Page 66 APPENDIX B — PHYSICAL DATA Table D — Physical Data - Horizontal (Cooling) 15 To 17.5 Tons (RTPF Coils) 50TC-D18 50TC-E18 50TC-D21 50TC-E21 REFRIGERATION SYSTEM # Circuits / # Comp. / Type 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll R-410A charge A/B (lbs)
  • Page 67 APPENDIX B — PHYSICAL DATA Table D — Physical Data - Horizontal (Cooling) 15 To 17.5 Tons (RTPF Coils) (cont) 50TC-D18 50TC-E18 50TC-D21 50TC-E21 COND. COIL (CIRCUIT B) Coil type RTPF RTPF RTPF RTPF Coil length (in.) Coil height (in.) Rows / FPI 2 /17 2 /17...
  • Page 68 APPENDIX B — PHYSICAL DATA Table E — Physical Data - Horizontal (Cooling) 20 To 25 Tons (RTPF Coils) 50TC-D25 50TC-E25 50TC-D29 50TC-E29 REFRIGERATION SYSTEM # Circuits / # Comp. / Type 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll R-410A charge A/B (lbs)

  • Page 69: Appendix C - Fan Performance

    APPENDIX C — FAN DATA Table F — 50TC-*17 Vertical Supply/Return (15 tons) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 4500 0.60 0.89 1.20 1.54 1.90 4900 0.72 1.02 1.36 1.72 2.09 5250 0.85 1.16 1.51 1.88 2.27 5650 1.01 1.33 1.70 2.09 2.50...
  • Page 70 APPENDIX C — FAN DATA Table G — 50TC-*20 Vertical Supply/Return (17.5 tons) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.85 1.16 1.51 1.88 2.27 5250 1.03 1.35 1.72 2.11 2.53 5700 1.25 1.58 1.96 2.37 2.81 6150 1.46 1.81 2.20 2.63 3.08 6550...
  • Page 71 APPENDIX C — FAN DATA Table H — 50TC-*24 Vertical Supply/Return (20 tons) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.13 1.48 1.80 2.13 2.46 6000 1.36 1.75 2.11 2.46 2.82 6500 1.63 2.06 2.45 2.83 3.21 7000 1.93 2.40 2.83 3.24 3.65 7500...
  • Page 72 APPENDIX C — FAN DATA Table I — 50TC-*28 Vertical Supply/Return (25 tons) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.35 1.85 2.29 2.70 3.12 7500 1.62 2.19 2.68 3.14 3.60 8150 1.89 2.54 3.08 3.59 4.08 8750 2.20 2.96 3.56 4.12 4.65 9400...
  • Page 73 APPENDIX C — FAN DATA Table J — 50TC-*30 Vertical Supply/Return (27.5 tons) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.66 2.25 2.75 3.22 3.67 8250 1.98 2.67 3.23 3.75 4.25 8950 2.32 3.13 3.76 4.34 4.89 9650 2.65 3.60 4.30 4.93 5.54 10300...
  • Page 74 APPENDIX C — FAN DATA Table K — 50TC-*18 Horizontal Supply/Return (15 tons) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.04 1.51 2.03 2.59 3.19 4500 1.26 1.76 2.30 2.89 3.51 4900 1.48 2.00 2.57 3.18 3.82 5250 1.76 2.30 2.90 3.54 4.21 5650...
  • Page 75 APPENDIX C — FAN DATA Table L — 50TC-*21 Horizontal Supply/Return (17.5 tons) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.48 2.00 2.57 3.18 3.82 5250 1.80 2.35 2.95 3.58 4.26 5700 2.16 2.74 3.37 4.04 4.75 6150 2.54 3.14 3.80 4.50 5.23 6550...
  • Page 76 APPENDIX C — FAN DATA Table M — 50TC-*25 Horizontal Supply/Return (20 tons) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.54 2.01 2.51 3.02 3.56 6000 1.87 2.37 2.90 3.45 4.02 6500 2.25 2.79 3.35 3.93 4.53 7000 2.68 3.25 3.85 4.46 5.09 7500...
  • Page 77 APPENDIX C — FAN DATA Table N — 50TC-*29 Horizontal Supply/Return (25 tons) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 2.68 3.25 3.85 4.46 5.09 7500 3.17 3.78 4.41 5.05 5.72 8000 3.73 4.36 5.02 5.70 6.40 8500 4.34 5.01 5.71 6.42 7.15 9000...
  • Page 78 APPENDIX C — FAN DATA Table O — Pulley Adjustment (Vertical Units) MOTOR PULLEY TURNS OPEN MOTOR/DRIVE UNIT COMBO Standard Static 3 phase Medium Static High Static 1009 Standard Static 3 phase Medium Static High Static 1078 1058 1039 1019 1000 Standard Static 3 phase...

  • Page 79: Appendix D - Wiring Diagrams

    APPENDIX D — WIRING DIAGRAMS Table Q — Wiring Diagrams DUAL CIRCUIT HUMIDI-MIZER 50TC SIZE VOLTAGE CONTROL POWER CONTROL POWER 50HE500894 - L 50HE502185 - E 208/230-3-60 (page 83) (page 86) 50HE500887 - L 50HE502180 - G 50HE502182 - F 17, 18 460-3-60 (page 80)
  • Page 80 APPENDIX D — WIRING DIAGRAMS Fig. C — 50TC 17-28 Control Wiring Diagram...
  • Page 81 APPENDIX D — WIRING DIAGRAMS Fig. D — 50TC 30 Control Wiring Diagram (208/230-3-60 Units)
  • Page 82 APPENDIX D — WIRING DIAGRAMS Fig. E — 50TC 30 Control Wiring Diagram (460-3-60, 575-3-60 Units)
  • Page 83 APPENDIX D — WIRING DIAGRAMS Fig. F — 50TC 17-30 Power Wiring Diagram (208/230-3-60 Units)
  • Page 84 APPENDIX D — WIRING DIAGRAMS Fig. G — 50TC 17-30 Power Wiring Diagram (460-3-60, 575-3-60 Units)
  • Page 85 APPENDIX D — WIRING DIAGRAMS Fig. H — 50TC 17-30 Control Wiring Diagram with Humidi-MiZer System...
  • Page 86 APPENDIX D — WIRING DIAGRAMS Fig. I — 50TC 17-30 Power Wiring Diagram (208/230-3-60 Units) with Humidi-MiZer System...
  • Page 87 APPENDIX D — WIRING DIAGRAMS Fig. J — 50TC 17-30 Power Wiring Diagram (460-3-60 Units) with Humidi-MiZer System...
  • Page 88 APPENDIX D — WIRING DIAGRAMS Fig. K — 50TC 17-30 Power Wiring Diagram (575-3-60 Units) with Humidi-MiZer System...
  • Page 89 APPENDIX D — WIRING DIAGRAMS Fig. L — 50TC PremierLink System Wiring Diagram...
  • Page 90 APPENDIX D — WIRING DIAGRAMS Fig. M — 50TC RTU Open Wiring Diagram...
  • Page 91 APPENDIX D — WIRING DIAGRAMS Fig. N — 50TC SAV / VFD System Wiring Diagram...

  • Page 92: Appendix E - Motormaster Sensor

    APPENDIX E — MOTORMASTER SENSOR LOCATIONS SENSOR LOCATION SENSOR LOCATION Fig. O — Motormaster Sensor Location (Sizes 17-25) Fig. P — Motormaster Sensor Location (Sizes 28-30)
  • Page 94 © 2021 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500227-01 Printed in U.S.A. Form 50TC-17-30-02SM Pg 94 1-21 Replaces: 50TC-17-30-01SM...

  • Page 95: Start-Up Checklist

    START-UP CHECKLIST — 50TC 17-30 SINGLE PACKAGE ROOFTOP WITH HEAT/ELECTRIC COOLING WITH PURON (R-410A) REFRIGERANT NOTE: To avoid injury to personnel and damage to equipment or property when completing the procedures listed in this start-up checklist, use good judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preceding sec- tions of this Service and Maintenance Instruction document.
  • Page 96 10. Restore set-points for thermostat and humidistat (Y/N) _____ REPEAT PROCESS FOR 2 COMPRESSOR SYSTEMS © 2021 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500227-01 Printed in U.S.A.

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