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Carrier WeatherMaker 50FCQ 17 Series Service And Maintenance Instructions
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Carrier WeatherMaker 50FCQ 17 Series Service And Maintenance Instructions

Carrier WeatherMaker 50FCQ 17 Series Service And Maintenance Instructions

Single package rooftop heat pump with puron r-410a refrigerant and ecoblue fan technology
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Service and Maintenance Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 2
UNIT ARRANGEMENT AND ACCESS . . . . . . . . . . . . 3
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 3
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SUPPLY FAN (BLOWER) SECTION . . . . . . . . . . . . . . 5
Supply Fan (Direct-Drive) . . . . . . . . . . . . . . . . . . . . . . 6
Staged Air Volume . . . . . . . . . . . . . . . . . . . . . . . . . . 14
COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Condenser Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . 14
Evaporator Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Evaporator Coil Metering Devices . . . . . . . . . . . . . . 16
Typical Unit Piping . . . . . . . . . . . . . . . . . . . . . . . . . . 16
TXV Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Replacing TXV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
®
(R-410A) REFRIGERANT . . . . . . . . . . . . . . 21
Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . 21
COMPRESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Replacing Compressor . . . . . . . . . . . . . . . . . . . . . . . 25
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . 25
Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Condenser-Fan Adjustment . . . . . . . . . . . . . . . . . . . 25
Troubleshooting Cooling System . . . . . . . . . . . . . . 26
CONVENIENCE OUTLETS . . . . . . . . . . . . . . . . . . . . 27
Convenience Outlets . . . . . . . . . . . . . . . . . . . . . . . . 27
Installing Weatherproof Cover . . . . . . . . . . . . . . . . . 27
Non-Powered Type . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Unit-Powered Type . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Duty Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Fuse on Powered Type . . . . . . . . . . . . . . . . . . . . . . . 28
COMMERCIAL DEFROST CONTROL . . . . . . . . . . . . 28
Reversing Valve Control . . . . . . . . . . . . . . . . . . . . . 28
Compressor Control . . . . . . . . . . . . . . . . . . . . . . . . . 28
Auxiliary (Electric) Heat Control . . . . . . . . . . . . . . . 28
Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
ELECTRIC HEATERS . . . . . . . . . . . . . . . . . . . . . . . . 30
Heater Installation (All Units) . . . . . . . . . . . . . . . . . . 30
(65KA SCCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
(60KA SCCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500305-01
Page
Printed in U.S.A.
Form 50FCQ-17-28-01SM
WeatherMaker
Single Package Rooftop Heat Pump
with Puron
®
and EcoBlue™ Fan Technology
Completing Heater Installation . . . . . . . . . . . . . . . . .35
SMOKE DETECTORS . . . . . . . . . . . . . . . . . . . . . . . . .36
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Smoke Detector Sensor . . . . . . . . . . . . . . . . . . . . . .36
Smoke Detector Locations . . . . . . . . . . . . . . . . . . . .36
SENSOR AND CONTROLLER TESTS . . . . . . . . . . .39
Sensor Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Controller Alarm Test . . . . . . . . . . . . . . . . . . . . . . . .39
Dirty Controller Test . . . . . . . . . . . . . . . . . . . . . . . . .39
Dirty Sensor Test . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Changing the Dirt Sensor Test . . . . . . . . . . . . . . . . .39
Remote Station Test . . . . . . . . . . . . . . . . . . . . . . . . .40
Dirty Sensor Test Using an SD-TRK4 . . . . . . . . . . .40
Detector Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
PROTECTIVE DEVICES . . . . . . . . . . . . . . . . . . . . . . .42
Compressor Protection . . . . . . . . . . . . . . . . . . . . . . .42
Relief Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Control Circuit, 24-V . . . . . . . . . . . . . . . . . . . . . . . . .42
SYSTEMVU CONTROL SYSTEM . . . . . . . . . . . . . . . .43
SystemVu Interface . . . . . . . . . . . . . . . . . . . . . . . . . .43
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . .43
ECONOMIZER SYSTEMS . . . . . . . . . . . . . . . . . . . . .44
EconoMi$er2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
EconomizerONE (Factory Option) . . . . . . . . . . . . . .62
PRE-START-UP/START-UP . . . . . . . . . . . . . . . . . . . .83
START-UP, GENERAL . . . . . . . . . . . . . . . . . . . . . . . .83
Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
Additional Installation/Inspection . . . . . . . . . . . . . .83
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
Outdoor-Air Inlet Screens . . . . . . . . . . . . . . . . . . . . .83
Compressor Mounting . . . . . . . . . . . . . . . . . . . . . . .83
Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
Refrigerant Service Ports . . . . . . . . . . . . . . . . . . . . .83
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . .84
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
Ventilation (Continuous Fan) . . . . . . . . . . . . . . . . . .84
FASTENER TORQUE VALUES . . . . . . . . . . . . . . . . .84
START-UP, SYSTEMVU CONTROLS . . . . . . . . . . . .84
Pg 1
®
50FCQ*17-28
(R-410A) Refrigerant
6-24
Replaces: New

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Summary of Contents for Carrier WeatherMaker 50FCQ 17 Series

  • Page 1: Table Of Contents

    ® WeatherMaker 50FCQ*17-28 Single Package Rooftop Heat Pump with Puron ® (R-410A) Refrigerant and EcoBlue™ Fan Technology Service and Maintenance Instructions CONTENTS Completing Heater Installation ....35 SMOKE DETECTORS .

  • Page 2: Safety Considerations

    APPENDIX A — MODEL NUMBER  NOMENCLATURE......85 WARNING APPENDIX B — PHYSICAL DATA ....86 APPENDIX C —...

  • Page 3: Unit Arrangement And Access

    UNIT ARRANGEMENT AND ACCESS General Hood Carton Location Control Box Figures 1 and 2 show general unit arrangement and access (rear access panel) Access Panel locations. Filter and Indoor Coil Access Panel Control Box Unit Center Post Access Panel Filter and Indoor Coil Access Panel Indoor Blower...

  • Page 4: Seasonal Maintenance

    SEASONAL MAINTENANCE Return air filters are disposable fiberglass media type. Access to the filters is through the vertical panel to the right of the control These items should be checked at the beginning of each season (or box. Filters are situated on slide out racks for easy inspection and more often if local conditions and usage patterns dictate): repair.

  • Page 5: Supply Fan (Blower) Section

    Apply seal strip to the back of this flange Apply seal strip to the back of this flange Apply seal strip to the back of this flange Apply seal strip to the front of this flange ITEM # DESCRIPTION Filter Support Central Retainer Side Retainer Hood Top...

  • Page 6: Supply Fan (Direct-Drive)

    Units with Electro-mechanical controls Supply Fan (Direct-Drive) The Fan Speed set up controls are located on the lower section of All FC units have the EcoBlue™ direct drive vane axial fan sys- the Unit Control Board (UCB). See Fig. 10 for location. tem.
  • Page 7 ESP in. wg Factory Setting: Calculator 9.0 V 6000 Field Setting: 6500 Record field setting here 7000 7500 8000 Switch Range: 8500 9000 4.1 - 7.5 9500 10.0 6.9 - 8.7 10000 7.7 - 10.0 Field Accessories: Economizer * Overlap in A, B, C switch range designed for maximum field adjustment potential.
  • Page 8 Units with SystemVu™ controls Use the DOWN arrow key highlight the UNIT CONFIGU- RATIONS menu then press ENTER. On units equipped with the factory-installed SystemVu controller the Fan Speed settings are accessed through the SystemVu interface. Highlight UNIT CONFIGURATIONS then press ENTER. Check the job specifications for the cfm (cubic feet per min- Highlight INDOOR FAN and then press ENTER.
  • Page 9 TROUBLESHOOTING THE ECM MOTOR EcoBlue™ motors are designed with several built-in protections included in the motor software. If the motor detects a fault it will safely shut down. See Table 15, “Supply Fan Motor Logic and Safety Relays” on page 42 for a complete list. Troubleshooting the motor requires a voltmeter.
  • Page 10 Removing the Motor and Fan Assembly NOTE: Due to press fit design of composite Rotor on Motor, it is highly recommended that any time a motor is replaced the fan ro- tor is replaced as well. The rest of the assembly may be reused. See Fig.
  • Page 11 Disassembling Standard/Medium Motor and Fan Assembly Disassembling High Static Motor and Fan Assembly See Fig. 15. See Fig. 16. NOTE: Refer to “MODEL NUMBER NOMENCLATURE” on NOTE: Refer to “MODEL NUMBER NOMENCLATURE” on page 85, position 10 for specific unit requirements. page 85, position 10 for specific unit requirements.
  • Page 12 Reassembly of Standard/Medium Motor and Fan Assembly Reassembly of High Static Motor and Fan Assembly See Fig. 17. See Fig. 18. NOTE: Refer to “MODEL NUMBER NOMENCLATURE” on NOTE: Refer to “MODEL NUMBER NOMENCLATURE” on page 85, position 10 for specific unit requirements. page 85, position 10 for specific unit requirements.
  • Page 13 Reinstalling Motor and Fan Assembly See Fig. 19. Align motor harness/grommet at ~7 o’clock (facing installer) and align the bottom flats on right and left sides of fan stator with fan deck ribs. Drop fan assembly down into fan deck opening and slide back until aluminum stator is under the rear fan deck brackets.

  • Page 14: Staged Air Volume

    ROUTINE CLEANING OF COIL SURFACES Staged Air Volume All 50FCQ units with EcoBlue™ technology come factory set to Periodic cleaning with Totaline environmentally balanced coil ®1 automatically adjust the indoor fan motor speed in sequence with cleaner is essential to extend the life of coils. This cleaner is the unit’s ventilation, cooling, and heating operation.
  • Page 15 11. Move the inner coil back into position. Reinstall the 4 coil Support (Field-Supplied) clips. Reinstall the top panel and replace all screws. Replace the compressor access panel. Top Panel Corner Post Compressor Access Panel Fig. 23 — Separating Coil Sections (Top View) Corner Post Fig.

  • Page 16: Evaporator Coil

    included with the cleaner. The optimum solution tempera- Table 1 — 50FCQ*17 – Cooling Mode ture is 100°F. NOTE: Do NOT USE water in excess of 130°F, as the enzy- COMPONENT STATUS/POSITION matic activity will be destroyed. Reversing Valve Energized Thoroughly apply Totaline environmentally balanced coil Check Valve A Closed...
  • Page 17 Table 6 — 50FCQ*24 – Defrost Mode Table 8 — 50FCQ*28 – Heating Mode COMPONENT STATUS/POSITION COMPONENT STATUS/POSITION Defrost Thermostat Closed Reversing Valve De-energized Outdoor Fan(s) Check Valve A Open Reversing Valve Energized Check Valve B Open Check Valve A Closed Check Valve C Closed...
  • Page 18 LPS/LOC Filter Drier Heating TXV Heating TXV Reversing Valve Indoor Coil Outdoor Coils Fig. 25 — Piping Schematic — 50FCQ*17 Heating Mode LPS/LOC Filter Drier Heating TXV Heating TXV Reversing Valve Indoor Coil Outdoor Coils Fig. 26 — Piping Schematic — 50FCQ*24/28 Cooling Mode...

  • Page 19: Thermostatic Expansion Valve (Txv)

    LPS/LOC Filter Drier Heating TXV Heating TXV Reversing Valve Indoor Coil Outdoor Coils Fig. 27 — Piping Schematic — 50FCQ*24/28 Heating Mode THERMOSTATIC EXPANSION VALVE (TXV) Replacing TXV Recover refrigerant. The TXV is a bi-flow, bleed port expansion valve with an external equalizer.

  • Page 20: Refrigerant System Pressure Access Ports

    Refrigerant System Pressure Access Ports V I E W W I T H T X V B U L B There are two access ports in the system: on the suction tube near I N S U L A T I O N C O V E R R E M O V E D the compressor and on the discharge tube near the compressor.

  • Page 21: Puron ® (R-410A) Refrigerant

    Amount of refrigerant charge is listed on the unit’s nameplate. Re- fer to Carrier GTAC2-5 Charging, Recovery, Recycling and Rec- Suction Pressure ..... . 140 psig (965 kPa) lamation training manual and the following procedures.

  • Page 22: Cooling Charging Charts

    COOLING CHARGING CHARTS 15 Ton 50FCQ / 547K / RHV R410A Refrigerant Charging Chart (Unit must run in cooling mode, have both compressors on and outdoor fans on high speed) 59.9 Add charge if Above Curve 48.8 37.7 26.6 Remove Charge if Below the Curve 15.5 -6.7 1034...
  • Page 23 COOLING CHARGING CHARTS 20 Ton 50FCQ / 547K / RHV R410A Refrigerant Charging Chart (Unit must run in cooling mode, have both compressors on and outdoor fans on high speed) 59.9 Add charge if Above Curve 48.8 37.7 26.6 Remove Charge if Below the Curve 15.5 -6.7 1034...
  • Page 24 COOLING CHARGING CHARTS 25 Ton 50FCQ / 547K / RHV R410A Refrigerant Charging Chart (Unit must run in cooling mode, have both compressors on and outdoor fans on high speed) 59.9 Add charge if Above Curve 48.8 37.7 26.6 Remove Charge if Below the Curve 15.5 -6.7 1034...

  • Page 25: Compressor

    COMPRESSOR Compressor Rotation Lubrication CAUTION The compressor is charged with the correct amount of oil at the factory. EQUIPMENT DAMAGE HAZARD Failure to follow this caution can result in premature wear and damage to equipment. CAUTION Scroll compressors can only compress refrigerant if rotat- UNIT DAMAGE HAZARD ing in the right direction.

  • Page 26: Troubleshooting Cooling System

    Troubleshooting Cooling System Refer to Table 10 for additional troubleshooting topics. Table 10 — Troubleshooting SYMPTOM CAUSE SOLUTION Power failure. Call power company. Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. Determine root cause. Defective thermostat, contactor, transformer. Replacement component.

  • Page 27: Convenience Outlets

    CONVENIENCE OUTLETS GFCI Receptacle Cover — While-In-Use Not Included Weatherproof WARNING ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal injury or death. Units with convenience outlet circuits may use multiple disconnects. Check convenience outlet for power status before opening unit for service.

  • Page 28: Duty Cycle

    COMMERCIAL DEFROST CONTROL On 50FCQ units equipped with electro-mechanical controls the Defrost Control Board (DFB) coordinates thermostat demands for supply fan control, 2 stage cooling, 2 stage heating, emergency heating and defrost control with unit operating sequences. The DFB also provides an indoor fan off delay feature (user select- able).

  • Page 29: Defrost

    Table 11 — 50FCQ Defrost Board I/O and Jumper Configurations POINT NAME TYPE OF I/O CONNECTION PIN NUMBER UNIT CONNECTION NOTE INPUTS G Fan DI, 24 vac P2-3 UCB-REHEAT/HP-6 Y1 Cool 1 DI, 24 vac P2-5 UCB-REHEAT/HP-1 Y2 Cool 2 DI, 24 vac P2-4 UCB-REHEAT/HP-3...

  • Page 30: Electric Heaters

    Table 12 — DIP Switch Positions • • • • • • • • • 30 minutes 60 minutes 90 minutes 120 minutes Fan Delay (factory default) Route heater power wires through grommeted notches in ver- ELECTRIC HEATERS tical fan deck support. (See Fig. 42.) Continue routing wires The 50FCQ units can be equipped with field-installed accessory under coil and filter support through the bottom notched sec- electric heaters.
  • Page 31 Route heater wires to terminal block assembly. two wires shall be installed with barrels “up.” Add sec- ond nut (Item 4) and tighten to 9-10 Nm (79-88 in.-lb). NOTE: There may be 2 or 4 wires per leg depending on heat- For 2 wire/lug assembly: add lock washers (Item 5), wire ter- er configuration.
  • Page 32 Heater Support Rails Grommets Opening For Heater Fig. 42 — Opening for Electric Heater Access Door Open Fig. 43 — Electric Heater Accessory In Place (Shown with Access Door Opened)
  • Page 33 Control Box VIEW D 460V Heater Wire VIEW C Fuse Block 4mm Allen Head Screws Blue Yellow Black Control Box Fuse Block Control Box Blue Heater Black Yellow Wires VIEW D VIEW C NOTE: Route heater wires to lugs as Shroud shown using top two holes in lugs.
  • Page 34 Cover 230V Heater Wiring VIEW G Control Box Main Fuse Blue Yellow Cover for Lugs Removed Heater Wiring Black VIEW H Control Box Line Side Main Fuse VIEW H VIEW G Power Wires 2 Heater Wires Per Terminal VIEW H 4 Heater Wires Per Terminal Fig.

  • Page 35: Completing Heater Installation

    Fuse Holder Terminal Block Fig. 46 — Single Point Installation Fig. 47 — Wiring Diagram for Single Point Kit Accessory When Required Completing Heater Installation Check electrical connections Turn thermostat to OFF position. Restore power to unit. Check voltage supply and match the reading against unit and heater nameplate.

  • Page 36: Smoke Detectors

    Air is introduced to the duct smoke detector sensor’s sensing SMOKE DETECTORS chamber through a sampling tube that extends into the HVAC Smoke detectors are available as factory-installed options on duct and is directed back into the ventilation system through a 50FCQ models.
  • Page 37 RETURN AIR SMOKE DETECTOR SENSOR WITH ECONOMIZER The sampling tube is inserted through the side plates of the econo- mizer housing, placing it across the return air opening on the unit basepan. The holes in the sampling tube face into the return air stream.

  • Page 38: Fiop Smoke Detector Wiring And Response

    HIGHLIGHT B FIOP Smoke Detector Wiring and Response 24-v power signal using the ORN lead is removed at the smoke ALL UNITS detector input on UCB; all unit operations cease immediately. The FIOP smoke detector is configured to automatically shut HIGHLIGHT C down all unit operations when a smoke condition is detected.

  • Page 39: Sensor And Controller Tests

    SENSOR AND CONTROLLER TESTS Dirty Sensor Test The dirty sensor test provides an indication of the sensor’s ability Sensor Alarm Test to compensate for gradual environmental changes. A sensor that The sensor alarm test checks a sensor’s ability to signal an can no longer compensate for environmental changes is consid- alarm state.

  • Page 40: Remote Station Test

    Remote Station Test The remote station alarm test checks a test/reset station’s ability to IMPORTANT: Failure to follow this ALERT can result in initiate and indicate an alarm state. an unnecessary evacuation of the facility. Holding the test magnet to the target area for longer than seven seconds will put the detector into the alarm state and activate IMPORTANT: Failure to follow this ALERT can result in all automatic alarm responses.

  • Page 41: Indicators

    NOTE: All troubles are latched by the duct smoke detector. The Indicators trouble condition must be cleared and then the duct smoke detec- NORMAL STATE tor must be reset in order to restore it to the normal state. The smoke detector operates in the normal state in the absence of RESETTING ALARM AND TROUBLE CONDITION TRIPS any trouble conditions and when its sensing chamber is free of Manual reset is required to restore smoke detector systems to Nor-...

  • Page 42: Protective Devices

    LOW PRESSURE SWITCH PROTECTIVE DEVICES The system is protected against a loss of charge and low evapora- Compressor Protection tor coil loading condition by a low pressure switch located on the OVERCURRENT suction line near the compressor. The switch is stem-mounted. Trip setting is 54 psig ±...

  • Page 43: Systemvu Control System

    Through the SystemVu interface, the user can access all of the The SystemVu control system is fully communicating and cable- inputs and outputs to check on their values and status, config- ready for connection to the Carrier Comfort Network (CCN), ®...

  • Page 44: Economizer Systems

    ECONOMIZER SYSTEMS Economizer Actuator The unit may be equipped with a factory-installed or accesso- Outside Air (this end) ry (field-installed) economizer system. Three types are avail- Damper able: two with a logic control system (EconomizerONE and EconoMi$er X) and one without a control system Wiring (EconoMi$er 2).

  • Page 45: Economi$Er2

    EconoMi$er2 IMPORTANT: The optional EconoMi$er 2 does not ® include a controller. The EconoMi$er2 is operated by a 4 mA to 20 mA signal from an existing field-supplied con- troller. See Fig. 61 for wiring information. BLACK Transformer Ground BLUE 500 OHM Resistor VIOLET...

  • Page 46: Economi$Er X (Factory-Installed Option)

    User Interface EconoMi$er X (Factory-Installed Option) Provides status for normal operation, setup parameters, checkout PRODUCT DESCRIPTION tests, and alarm and error conditions with a 2-line 16 character The EconoMi$er ® X system is an expandable economizer control LCD display and four button keypad. system, which includes a W7220 economizer module (controller) Electrical with an LCD and keypad (see Fig.

  • Page 47: Economizer Module Wiring Details

    Storage Temperature: Table 16 — Economizer Module — –40°F to 150°F (–40°C to 65°C) Left Hand Terminal Blocks Shipping Temperature: LABEL TYPE DESCRIPTION –40°F to 150°F (–40°C to 65°C) Top Left Terminal Block Relative Humidity: 20k NTC and Mixed Air Temperature Sensor (Polarity 5% to 95% RH non-condensing Insensitive Connection) 20k NTC and...

  • Page 48: Interface Overview

    CO Sensor (Hot) Black Yellow Analog Brown – Orange Green Switch Label Power supply. Provide disconnect means and overload protection as required. Switches Fig. 65 — CO Sensor Wiring INTERFACE OVERVIEW This section describes how to use the EconoMi$er ® X user inter- face for: •...

  • Page 49: Menu Structure

    To use the keypad when working with Set Points, System and Ad- IMPORTANT: Table 20 illustrates the complete hierarchy. vanced Settings, Checkout tests and Alarms: Your menu parameters may be different depending on your Navigate to the desired menu. configuration. Press the (Enter) button to display the first item in the For example, if you do not have a DCV (CO...
  • Page 50 Table 20 — W7220 Menu Structure PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT FIRST STAGE COOLING DEMAND (Y1–IN) ECONO AVAIL YES/NO YES = economizing available; the system can use outside air for free cooling when required. FIRST STAGE COOLING RELAY OUTPUT ECONOMIZING YES/NO YES = outside air being used for 1 stage cooling...
  • Page 51 Table 20 — W7220 Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT MECH COOL ON Displays stage of mechanical cooling that is active. 0, 1, or 2 HEAT STAGES ON Displays the stage of heat pump heating that is active. STATUS SUPPLY FAN SPEED (cont)
  • Page 52 Table 20 — W7220 Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT 0°F to 50°F ENERGY RECOVERY VENTILATOR UNIT OUTDOOR AIR ERV OAT SP 32°F (–18°C to 10°C); TEMPERATURE SETPOINT increment by 1°F Only displayed when AUX1 O = ERV. Exhaust fan set point for single speed units.
  • Page 53 Table 20 — W7220 Menu Structure (cont) PARAMETER PARAMETER 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 of 15 min, then cooling when economizer is first stage and mechanical cooling is STG3 DLY 2.0h...
  • Page 54 Table 20 — W7220 Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT DISCHARGE AIR S-BUS SENSOR ERROR DA SYLK T ERR Discharge air sensor has failed or become disconnected - check wiring then replace sensor if the alarm continues. OUTSIDE AIR TEMPERATURE SENSOR ERROR OA SENS T ERR Outdoor air temperature sensor has failed or become disconnected...
  • Page 55 2 SPEED FAN OPERATION The 2 speed fan delay is available when the system is programmed for 2 speed fan (in the System Setup menu item). The 2 speed fan The W7220 controller has the capability to work with a system us- delay is defaulted to 5 minutes and can be changed in the Ad- ing a 2-speed supply fan.

  • Page 56: Enthalpy Settings

    ENTHALPY SETTINGS When all of the OA conditions are above the selected bound- ary, the conditions are not good to economize and the mode is When the OA temperature, enthalpy and dew point are below set to NO. the respective set points, the Outdoor Air can be used for econ- Figure 67 shows the 5 current boundaries.

  • Page 57: Troubleshooting

    CHECKOUT To perform a Checkout test: Scroll to the desired test in the Checkout menu using the ▲ Inspect all wiring connections at the economizer module’s termi- and ▼ buttons. nals, and verify compliance with the installation wiring diagrams. For checkout, review the Status of each configured parameter and Press the (Enter) button to select the item.

  • Page 58: Economizerone (Field-Installed Accessory)

    EconomizerONE (Field-Installed Accessory) MOUNTING, INSTALLATION, AND WIRING WARNING Failure to follow this caution may result in damage to equipment. Be sure to allow enough time for compressor startup and shutdown between checkout tests so that the compressors do not short-cycle. Mounting the Economizer Controller Base Module Before mounting, leave specific mounting clearances so that there is space for mounting, wiring, and servicing.
  • Page 59 Table 24 — Economizer Control Wiring Settings LABEL TYPE DESCRIPTION RS485 Modbus A Line A RS485 Modbus B Line B ¬ GND_ISO Earth Ground Type II NTC 10K or 0-10 vdc Mixed or Discharge Air Temperature Sensor Mixed or Discharge Air Temperature Sensor Common Type II NTC 10K or 0-10 vdc Outside Air Temperature Sensor 0-10 vdc or 4-20mA...
  • Page 60 CONNECTING PERIPHERAL DEVICES TO THE  ECONOMIZER CONTROLLER See Fig. 69-73 for wiring details. • Outside Air: Connect to the Mixed or Discharge Air Temperature Sensor OAT and COM terminals of the Outside Air Temperature Sensor device. • Return Air (Differential): Return Air Temperature Sensor Connect to the RAT...
  • Page 61 • Outside Combination Temperature/ Humidity: Connect Combo Temperature and Humidity Sensor to the OAT, COM, and OAH terminals of the device. • Combo Temperature and Humidity Sensor Return Combination Temperature/ Humidity: Connect to the RAT, S-COM, and RAH terminals of the device. Fig.

  • Page 62: Economizerone (Factory Option)

    LED Indication EconomizerONE (Factory Option) NOTE: If different faulty events occur at the same time, the ECONOMIZER SETTINGS sensor/DAC LED lights up following this priority: Red  Interface Overview Yellow  Off. For example, if there is a humidity sensor error and air temperature failure at the same time, the sensor LED EconomizerONE turns red rather than yellow.
  • Page 63 Table 25 — LED Indication FREE SENSOR Power STATUS COOLING DAC LED Yellow Yellow Yellow Commissioning mode Blinking Blinking Blinking Power start-up Yellow On Yellow On Yellow On Free cooling is running Green On — — Free cooling is available Green —...
  • Page 64 Table 26 — Free Cooling Functions CONTROL MODE SENSORS USED ENABLE FREE COOLING? The outside air dry bulb temperature is compared with the set temperature Control Mode 1 OA (outside air) Temperature Sensor shutoff set point. • Fixed Dry Bulb and MA (Mixed Air) Temperature Sensor If the outside air dry bulb temperature is below the temperature shutoff set point, then the outside air is used to meet all or part of the cooling demand.
  • Page 65 Table 30 — Different Fan Speeds with Different Table 28 — 2-Stage Cooling Stage I/O Logic Configured Outputs ECONOMIZER COOLING COOLING FAN TYPE 1-SPEED COOLING 2-STAGE COOLING CONDITION MET STAGE 1 STAGE 2 • Spd H (regardless of • Spd H (regardless of 1-SPEED cooling demand, cooling demand,...
  • Page 66 Table 32 — Different Damper Position Setting with Different Configured Outputs (DCV is Enabled) FAN TYPE 1-STAGE COOLING 2-STAGE COOLING • 2VENTMIN H to 2VENTMAX H (regardless of • 2VENTMIN H to 2VENTMAX H (regardless of 1-SPEED FAN cooling demand, OCC=Yes) cooling demand, OCC=Yes) 2VENTMIN L to 2VENTMAX L ...
  • Page 67 • If Exhaust Fan 2 is connected and configured, then Fault Detection and Diagnostics Exhaust Fan 2 parameter group (L, M, and H) is available, The economizer controller can detect and diagnose free cooling depending on fan configuration. faults, sensor operation faults, and damper modulating faults. It •...
  • Page 68 WIRING WARNING Failure to follow this caution may result in damage to equipment. Be sure to allow enough time for compressor startup and shutdown between checkout tests so that the compressors do not short-cycle.  Mounting Devices Connected to the Economizer Controller Devices like damper actuators, sensors (temperature sensor, hu- midity sensor, combination temperature and humidity sensor, CO...
  • Page 69 Table 34 — Economizer Control Wiring Settings LABEL TYPE DESCRIPTION RS485 Modbus A Line A RS485 Modbus B Line B ¬ GND_ISO Earth Ground Type II NTC 10K or 0-10 vdc Mixed or Discharge Air Temperature Sensor Mixed or Discharge Air Temperature Sensor Common Type II NTC 10K or 0-10 vdc Outside Air Temperature Sensor 0-10 vdc or 4-20mA...
  • Page 70 Connecting Peripheral Devices to the Economizer Controller See Fig. 81-85 for wiring details. • Outside Air: Connect to the Mixed or Discharge Air Temperature Sensor OAT and COM terminals of the Outside Air Temperature Sensor device. • Return Air (Differential): Return Air Temperature Sensor Connect to the RAT and S-COM...
  • Page 71 • Outside Combination Temperature/ Humidity: Connect Combo Temperature and Humidity Sensor to the OAT, COM, and OAH terminals of the device. • Combo Temperature and Humidity Sensor Return Combination Temperature/ Humidity: Connect to the RAT, S-COM, and RAH terminals of the device. Fig.
  • Page 72 SETUP AND CONFIGURATION NOTE: Parameters and display menus may display differently/dynamically if different applications are config- ured. See Tables 35-42. IMPORTANT: Before setup and configuration, it is recom- mended to obtain some location-based values, such as shutoff points, or utilize the location services in the Climatix ™...
  • Page 73 Table 35 — Status Display PARAMETER DESCRIPTION VALUE 1FREECOOL Indicates if the system can use outdoor air for free cooling. 1ECON ENAB Indicates if outdoor air is being used for the first stage of cooling. Indicates if the space is occupied. If users choose ALWAYS for 6OCC when configuring I/Os, the parameter value is YES;...
  • Page 74 Table 36 — Parameter Settings — Basic PARAMETER DESCRIPTION RANGE DEFAULT Temperature shutoff set point can be obtained automatically if a smartphone or tablet is connected to the network provided by a Wi-Fi/WLAN stick 2 TEMP OFF plugged into the Economizer Controller and the mobile application is 48...80°F;...
  • Page 75 Table 37 — Parameter Settings — Advanced PARAMETER DESCRIPTION VALUE/RANGE DEFAULT 3FREEZE POS Anti-freeze protection damper position (closed or minimum). 3SD ACT POS Damper position during shutdown (open or closed). MAT sensor location: • Choose MAT if the sensor is installed before the DX (Direct Expansion) coil. 3DIF T LOC •...
  • Page 76 Table 38 — Parameter Settings — I/O Configurations (cont) PARAMETER DESCRIPTION VALUE DEFAULT Choose ACT FB if feedback signal is available from the connected damper ACT FB 6AUX-AI2 ACT FB actuator. Otherwise, choose NONE. NONE Choose “COOL 2” if Cooling Stage 2 is available (another compressor is COOL 2 6Y2O COOL 2...
  • Page 77 Table 41 — Enter Running State PARAMETER DESCRIPTION 8RUN STATE Change to Running State. Press Enter to confirm the change. 8ENTER RUN? Confirm the change to Running State. Perform factory reset. Press Enter to confirm the reset. (This action resets the controller 8FACTORY DEF password to default: OneBT.) 8DEF CONFIRM?
  • Page 78 2.75" (70 mm) 3.95" (100 mm) NOTE: Dimensions in inches (mm). Fig. 86 — HH57LW001 Dimensional, Connection and Switching Information 1.327 Max 18.0±0.25 1/4" Stud Hole 0.531±0.008 20 AWG 7/28 PVC Insulated Wire 1/8" ø Black 2-520102-2 (one black/one red) Polyolefin Heat Shrink Insulation Connectors...
  • Page 79 U.S. and Canada I-Codes / ASHRAE Zones Climate Zone 1 Climate Zone 5 and Marine Climate Zone 2 Climate Zone 6 Climate Zone 3 Climate Zone 7 and 8 Climate Zone 4 (Except Marine) Fig. 90 — U.S. and Canada Climate Zones Table 43 —...
  • Page 80 Economizers are shipped standard with an HH79NZ039 outside Table 44 — California Title 24 Regional High Limit air dry bulb sensor (refer to Fig. 87). System default setting (high Dry Bulb Temperature Settings temp limit) is 63°F (17°C) and has a range of 48°F to 80°F (9°C to REQUIRED HIGH LIMIT 27°C).

  • Page 81: Electric Shock Hazard

    CHECKOUT NOTE: All settings are stored in non-volatile flash memory. Status Inspect all wiring connections at the economizer module’s termi- nals, and verify compliance with the installation wiring diagrams. Use the Status menu (refer to Table 35) to check the parameter For checkout, review the Status of each configured parameter and values for the various devices and sensors configured.
  • Page 82 TROUBLESHOOTING For EconomizerONE troubleshooting issues, see Table 46. Table 46 — Operating Issues and Concerns SYMPTOM REASON SOLUTION An alarm is displayed on the Sensor, damper, or the whole working Check sensor, damper, or the whole working system following the detailed alarm information. system may not work properly DAC LED is blinking RED Damper slippage...

  • Page 83: Pre-Start-Up/Start-Up

    using electronic leak detector, halide torch, or liquid- soap solution. c. Inspect all field-wiring and factory-wiring connections. PRE-START-UP/START-UP Be sure that connections are completed and tight. Be sure that wires are not in contact with refrigerant tubing or sharp edges. WARNING d.

  • Page 84: Compressor Rotation

    Compressor Rotation Heating To start unit, turn on main power supply. Set system selector switch to the HEAT position and set thermostat at a setting above CAUTION room temperature. Set fan to AUTO position. First stage of thermostat energizes the first stage of the electric EQUIPMENT DAMAGE HAZARD heaters.

  • Page 85: Appendix A - Model Number Nomenclature

    APPENDIX A — MODEL NUMBER NOMENCLATURE Position: 9 10 11 12 13 14 15 16 17 18 Example: Unit Heat Type Packaging Compliance 50 = Cooling Packaged Rooftop 0 = Standard Model Series - WeatherMaker ® Electrical Options FC = Standard Efficiency (EcoBlue™ Technology) A = None C = Non-Fused Disconnect Heat Type...

  • Page 86: Appendix B - Physical Data

    APPENDIX B — PHYSICAL DATA Table A — 50FCQ 17 to 28 Physical Data 50FCQ UNIT 50FCQM17 50FCQM24 50FCQM28 NOMINAL TONS BASE UNIT OPERATING WT (lb) 1627 2057 2125 REFRIGERATION SYSTEM No. Circuits / No. Compressors / Type 1 / 2 / Scroll 1 / 2 / Scroll 1 / 2 / Scroll Puron...

  • Page 87: Appendix C - Fan Performance

    APPENDIX C — FAN PERFORMANCE For information on the electrical properties of the fan motors, GENERAL FAN PERFORMANCE NOTES please see the Electrical information section of the product Interpolation is permissible. Do not extrapolate. specifications book. External static pressure is the static pressure difference between the return duct and the supply duct plus the static For more information on the performance limits of the fan pressure caused by any FIOPs or accessories.
  • Page 88 APPENDIX C — FAN PERFORMANCE (cont) 50FCQM17 — 15 Ton Vertical Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 4500 0.61 1065 0.90 1180 1.23 1285 1.59 1380 1.97 4875 0.73 1112 1.03 1224 1.37 1325 1.74 1418 2.14 5250 1048...
  • Page 89 APPENDIX C — FAN PERFORMANCE (cont) 50FCQM17 – High Static — 15 Ton Vertical Supply (rpm - Vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 4500 1065 1180 1285 1380 4875 1112 1224 1325 1418 5250 1048 1161 1268 1366 1457 5625 1106 1211...
  • Page 90 APPENDIX C — FAN PERFORMANCE (cont) 50FCQM24 — 20 Ton Vertical Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 6000 1038 0.84 1148 1.14 1251 1.47 1351 1.86 1448 2.28 6500 1103 1.01 1207 1.32 1304 1.66 1398 2.05 1490 2.48...
  • Page 91 APPENDIX C — FAN PERFORMANCE (cont) 50FCQM24 – High Static — 20 Ton Vertical Supply (rpm - Vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 6000 1038 1148 1251 1351 1448 6500 1103 1207 1304 1398 1490 7000 1169 1269 1360 1448 1535 7500...
  • Page 92 APPENDIX C — FAN PERFORMANCE (cont) 50FCQM28 — 25 Ton Vertical Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 7500 1099 1.27 1174 1.55 1256 1.90 1343 2.32 1433 2.82 8125 1177 1.58 1246 1.87 1319 2.22 1397 2.64 1479 3.13...
  • Page 93 APPENDIX C — FAN PERFORMANCE (cont) 50FCQM28 – High Static — 25 Ton Vertical Supply (rpm - Vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 7500 1099 1174 1256 1343 1433 8125 1177 1246 1319 1397 1479 8750 1256 1319 1385 1456 1530 9375...
  • Page 94 APPENDIX C — FAN PERFORMANCE (cont) 50FCQM17 — 15 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 4500 1055 0.71 1171 0.97 1279 1.26 1379 1.58 1472 1.92 4875 1122 0.85 1231 1.12 1334 1.43 1430 1.76 1520 2.11...
  • Page 95 APPENDIX C — FAN PERFORMANCE (cont) 50FCQM24 — 20 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 6000 1267 1.20 1361 1.49 1451 1.81 1538 2.15 1621 2.52 6500 1356 1.45 1443 1.75 1527 2.07 1609 2.43 1688 2.80...
  • Page 96 APPENDIX C — FAN PERFORMANCE (cont) 50FCQM28 — 25 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 7500 1406 2.11 1483 2.47 1559 2.87 1636 3.32 1711 3.80 8125 1509 2.60 1580 2.98 1651 3.40 1722 3.86 1792 4.35...

  • Page 97: Appendix D - Wiring Diagrams

    APPENDIX D — WIRING DIAGRAMS 50FCQ*17-28 — Standard SCCR Wiring Diagrams UNIT SIZE VOLTAGE CONTROL PAGE POWER PAGE 208/230-3-60 50HE004159 50HE006215 50FCQ*17 with Electro-Mechanical 460-3-60 50HE006216 50HE004158 Controller – W7220 575-3-60 50HE006217 208/230-3-60 50HE004159 50HE003738 50FCQ*24-28 with Electro-Mechanical 460-3-60 50HE003758 50HE004158 Controller –...
  • Page 98 APPENDIX D — WIRING DIAGRAMS (cont) Fig. B — Typical 50FCQ*17-28 Control Wiring Diagram — Electro-Mechanical – W7220 (208/230-3-60)
  • Page 99 APPENDIX D — WIRING DIAGRAMS (cont) Fig. C — Typical 50FCQ*17-28 Control Wiring Diagram — Electro-Mechanical – W7220 (460, 575-3-60)
  • Page 100 APPENDIX D — WIRING DIAGRAMS (cont) Fig. D — Typical 50FCQ*17-28 Control Wiring Diagram with POL224 (208/230-3-60)
  • Page 101 APPENDIX D — WIRING DIAGRAMS (cont) Fig. E — Typical 50FCQ*17-28 Control Wiring Diagram with POL224 (460, 575-3-60)
  • Page 102 APPENDIX D — WIRING DIAGRAMS (cont) Fig. F — Typical 50FCQ*17-28 Control Wiring Diagram with SystemVu (208/230-3-60)
  • Page 103 APPENDIX D — WIRING DIAGRAMS (cont) Fig. G — Typical 50FCQ*17-28 Control Wiring Diagram with SystemVu (460, 575-3-60)
  • Page 104 APPENDIX D — WIRING DIAGRAMS (cont) Fig. H — Typical 50FCQ*17-28 Control Wiring Diagram (208/230-3-60) — High SCCR...
  • Page 105 APPENDIX D — WIRING DIAGRAMS (cont) Fig. I — Typical 50FCQ*17-28 Control Wiring Diagram (460-3-60) — High SCCR...
  • Page 106 APPENDIX D — WIRING DIAGRAMS (cont) Fig. J — Typical 50FCQ*17-28 Control Wiring Diagram with POL224 (208/230-3-60) — High SCCR...
  • Page 107 APPENDIX D — WIRING DIAGRAMS (cont) Fig. K — Typical 50FCQ*17-28 Control Wiring Diagram with POL224 (460-3-60) — High SCCR...
  • Page 108 APPENDIX D — WIRING DIAGRAMS (cont) Fig. L — Typical 50FCQ*17-28 Control Wiring Diagram with SystemVu (208/230-3-60) — High SCCR...
  • Page 109 APPENDIX D — WIRING DIAGRAMS (cont) Fig. M — Typical 50FCQ*17-28 Control Wiring Diagram with SystemVu (460-3-60) — High SCCR...
  • Page 110 APPENDIX D — WIRING DIAGRAMS (cont) Fig. N — Typical 50FCQ*17 Power Wiring Diagram — Electro-Mechanical and POL224 (208/230-3-60)
  • Page 111 APPENDIX D — WIRING DIAGRAMS (cont) Fig. O — Typical 50FCQ*17 Power Wiring Diagram — Electro-Mechanical and POL224 (460-3-60)
  • Page 112 APPENDIX D — WIRING DIAGRAMS (cont) Fig. P — Typical 50FCQ*17 Power Wiring Diagram — Electro-Mechanical and POL224 (575-3-60)
  • Page 113 APPENDIX D — WIRING DIAGRAMS (cont) Fig. Q — Typical 50FCQ*24-28 Power Wiring Diagram — Electro-Mechanical and POL224 (208/230-3-60)
  • Page 114 APPENDIX D — WIRING DIAGRAMS (cont) Fig. R — Typical 50FCQ*24-28 Power Wiring Diagram — Electro-Mechanical and POL224 (460-3-60)
  • Page 115 APPENDIX D — WIRING DIAGRAMS (cont) Fig. S — Typical 50FCQ*24-28 Power Wiring Diagram — Electro-Mechanical and POL224 (575-3-60)
  • Page 116 APPENDIX D — WIRING DIAGRAMS (cont) Fig. T — Typical 50FCQ*17 Power Wiring Diagram — SystemVu Controller (208/230-3-60)
  • Page 117 APPENDIX D — WIRING DIAGRAMS (cont) Fig. U — Typical 50FCQ*17 Power Wiring Diagram — SystemVu Controller (460-3-60)
  • Page 118 APPENDIX D — WIRING DIAGRAMS (cont) Fig. V — Typical 50FCQ*17 Power Wiring Diagram — SystemVu Controller (575-3-60)
  • Page 119 APPENDIX D — WIRING DIAGRAMS (cont) Fig. W — Typical 50FCQ*24-28 Power Wiring Diagram — SystemVu Controller (208/230-3-60)
  • Page 120 APPENDIX D — WIRING DIAGRAMS (cont) Fig. X — Typical 50FCQ*24-28 Power Wiring Diagram — SystemVu Controller (460-3-60)
  • Page 121 APPENDIX D — WIRING DIAGRAMS (cont) Fig. Y — Typical 50FCQ*24-28 Power Wiring Diagram — SystemVu Controller (575-3-60)
  • Page 122 APPENDIX D — WIRING DIAGRAMS (cont) Fig. Z — Typical 50FCQ*17 Power Wiring Diagram — Electro-Mechanical and POL224 (208/230-3-60) — High SCCR...
  • Page 123 APPENDIX D — WIRING DIAGRAMS (cont) Fig. AA — Typical 50FCQ*17 Power Wiring Diagram — Electro-Mechanical and POL224 (460-3-60) — High SCCR...
  • Page 124 APPENDIX D — WIRING DIAGRAMS (cont) Fig. AB — Typical 50FCQ*24-28 Power Wiring Diagram — Electro-Mechanical and POL224 (208/230-3-60) — High SCCR...
  • Page 125 APPENDIX D — WIRING DIAGRAMS (cont) Fig. AC — Typical 50FCQ*24-28 Power Wiring Diagram — Electro-Mechanical and POL224 (460-3-60) — High SCCR...
  • Page 126 APPENDIX D — WIRING DIAGRAMS (cont) Fig. AD — Typical 50FCQ*17 Power Wiring Diagram — SystemVu Controller (208/230-3-60) — High SCCR...
  • Page 127 APPENDIX D — WIRING DIAGRAMS (cont) Fig. AE — Typical 50FCQ*17 Power Wiring Diagram — SystemVu Controller (460-3-60) — High SCCR...
  • Page 128 APPENDIX D — WIRING DIAGRAMS (cont) Fig. AF — Typical 50FCQ*24-28 Power Wiring Diagram — SystemVu Controller (208/230-3-60) — High SCCR...
  • Page 129 APPENDIX D — WIRING DIAGRAMS (cont) Fig. AG — Typical 50FCQ*24-28 Power Wiring Diagram — SystemVu Controller (460-3-60) — High SCCR...

  • Page 130: Appendix E - Low Ambient Control Sensor Location

    1. Apply conductive grease supplied with coil sensor (Item #1) on specified leg before attaching sensor to location with wire tie (Item #5). Fig. AH — 50FCQ*17 and 50FCQ*24-28 Outdoor Circuiting © 2024 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

  • Page 131: Start-Up Checklist

    START-UP CHECKLIST 50FCQ*17-28 Single Package Rooftop Heat Pump Unit (Remove and use for job file) 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 sections of this Service and Maintenance Instruction document.
  • Page 132 Turn off heating, cooling, and reheat, restore set points for thermostat and humidistat (Y/N) _____ © 2024 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500305-01 Printed in U.S.A.

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