Table of Contents
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Service and Maintenance Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 1
UNIT ARRANGEMENT AND ACCESS. . . . . . . . . . . . . 3
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Seasonal Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . 3
RETURN-AIR FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . 3
Removing the Return Air Filters . . . . . . . . . . . . . . . . . 3
Re-installing the Access Panel . . . . . . . . . . . . . . . . . . 3
Outside-Air Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Economizer Inlet Air Screen . . . . . . . . . . . . . . . . . . . . 4
Manual Outside Air Hood Screen . . . . . . . . . . . . . . . . 4
SUPPLY FAN (BLOWER) SECTION . . . . . . . . . . . . . . 4
Supply Fan (Direct-Drive) . . . . . . . . . . . . . . . . . . . . . . 4
Supply Fan (Belt-Drive) . . . . . . . . . . . . . . . . . . . . . . . . 6
HEAT PUMP REFRIGERATION SYSTEM . . . . . . . . . . 8
Outdoor Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Indoor Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Reversing Valve and Checking Valve Position . . . . 10
Metering Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Refrigerant System Pressure Access Ports . . . . . . 14
PURON® (R-410A) REFRIGERANT. . . . . . . . . . . . . . 14
Refrigerant Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . 14
COOLING CHARGING CHARTS . . . . . . . . . . . . . . . . 14
How To Use Cooling Charging Charts . . . . . . . . . . . 14
Compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Replacing the Compressor . . . . . . . . . . . . . . . . . . . . 18
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . 18
Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Outdoor Fan Location . . . . . . . . . . . . . . . . . . . . . . . . 18
Troubleshooting Cooling System. . . . . . . . . . . . . . . 18
CONVENIENCE OUTLETS . . . . . . . . . . . . . . . . . . . . . 20
Convenience Outlet Types . . . . . . . . . . . . . . . . . . . . 20
Installing Weatherproof Cover . . . . . . . . . . . . . . . . . 20
HEAT PUMP CONTROLS. . . . . . . . . . . . . . . . . . . . . . 21
Central Terminal Board . . . . . . . . . . . . . . . . . . . . . . . 21
PROTECTIVE CONTROLS . . . . . . . . . . . . . . . . . . . . . 21
Compressor Protection . . . . . . . . . . . . . . . . . . . . . . . 21
COMMERCIAL DEFROST CONTROL . . . . . . . . . . . . 22
Reversing Valve Control . . . . . . . . . . . . . . . . . . . . . . 23
Compressor Control . . . . . . . . . . . . . . . . . . . . . . . . . 23
Auxiliary (Electric) Heat Control . . . . . . . . . . . . . . . . 23
Defrost. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Defrost Thermostats . . . . . . . . . . . . . . . . . . . . . . . . . 24
Indoor Fan Off Delay . . . . . . . . . . . . . . . . . . . . . . . . . 24
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500224-01
Printed in U.S.A.
Form 50KCQ-4-6-01SM
50KCQ 04-06 Single Package Rooftop Unit
with Puron
Defrost Speedup Functions . . . . . . . . . . . . . . . . . . . .24
ELECTRIC HEATERS . . . . . . . . . . . . . . . . . . . . . . . . .24
Safety Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Completing Heater Installation . . . . . . . . . . . . . . . . .25
SMOKE DETECTORS . . . . . . . . . . . . . . . . . . . . . . . . .26
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Smoke Detector Locations. . . . . . . . . . . . . . . . . . . . .27
Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
FIOP Smoke Detector Wiring and Response . . . . . .28
Sensor and Controller Tests . . . . . . . . . . . . . . . . . . .29
Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
PREMIERLINK CONTROL . . . . . . . . . . . . . . . . . . . . .32
RTU-OPEN CONTROL SYSTEM. . . . . . . . . . . . . . . . .32
ECONOMIZER SYSTEMS . . . . . . . . . . . . . . . . . . . . . .33
EconoMi$er IV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Economi$er® X (Factory Option) . . . . . . . . . . . . . . .43
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
START-UP, GENERAL . . . . . . . . . . . . . . . . . . . . . . . .55
Additional Installation/Inspection . . . . . . . . . . . . . . .55
START-UP, PREMIERLINK™ . . . . . . . . . . . . . . . . . . .57
Perform System Check-Out . . . . . . . . . . . . . . . . . . . .57
START-UP, RTU-OPEN . . . . . . . . . . . . . . . . . . . . . . . .57
FASTENER TORQUE VALUES. . . . . . . . . . . . . . . . . .57
NOMENCLATURE. . . . . . . . . . . . . . . . . . . . . . . . . .58
APPENDIX B - PHYSICAL DATA . . . . . . . . . . . . . . .59
APPENDIX C - FAN PERFORMANCE . . . . . . . . . . .60
APPENDIX D - WIRING DIAGRAMS . . . . . . . . . . . .68
APPENDIX E - MOTORMASTER SENSOR
LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
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, re-
pair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions
of cleaning coils and filters and replacing filters. All other op-
erations should be performed by trained service personnel.
When working on air-conditioning equipment, observe precau-
tions in the literature, tags and labels attached to the unit, and
other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire extin-
guisher available for all brazing operations.
Pg 1
WeatherMaker
Heat Pump/Electric Heat
®
(R-410A) Refrigerant
2-2020
Replaces: NEW
®
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Related Manuals for Carrier WeatherMaker 50KCQ A04 Series
Summary of Contents for Carrier WeatherMaker 50KCQ A04 Series
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Page 1: Table Of Contents
® WeatherMaker 50KCQ 04-06 Single Package Rooftop Unit Heat Pump/Electric Heat with Puron ® (R-410A) Refrigerant Service and Maintenance Instructions CONTENTS Defrost Speedup Functions ....24 ELECTRIC HEATERS . - Page 2 It is important to recognize safety information. This is the safe- ty-alert symbol . When you see this symbol on the unit and WARNING in instructions or manuals, be alert to the potential for personal injury. FIRE, EXPLOSION HAZARD Understand the signal words DANGER, WARNING, CAU- Failure to follow this warning could result in death, serious TION, and NOTE.
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Page 3: Unit Arrangement And Access
• Inspect outdoor fan blade positioning UNIT ARRANGEMENT AND ACCESS • Ensure control box is clean General • Check control box wiring condition Figures 1 and 2 show general unit arrangement and access • Ensure wire terminals are tight locations. •... -
Page 4: Economizer Inlet Air Screen
Economizer Inlet Air Screen SUPPLY FAN (BLOWER) SECTION This air screen is retained by filter clips under the top edge of the hood. See Fig. 3. CAUTION ELECTRICAL SHOCK HAZARD Failure to follow this warning could cause personal injury or death. Before performing service or maintenance operations on the fan system, shut off all unit power and lockout/tag-out DIVIDER... - Page 5 208/230, 460-v Units 575-v Units Fig. 7 — ECM Unit Wiring ECM MOTOR Table 1 — 50KCQ Motor Tap Programming (percent The direct-drive motor is an X13 Electronically Commutated of full-load torque) Motor (ECM). An ECM motor contains electronic circuitry used to convert single-phase line AC voltage into 3-phase DC UNIT SIZE TAP 1...
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Page 6: Supply Fan (Belt-Drive)
Check for proper line voltage at motor power leads BLK BLOWER PULLEY (at L terminal) and YEL (at N terminal). V--- BELT Table 2 — Motor Test Volts MOTOR UNIT VOLTAGE MOTOR VOLTAGE MIN-MAX VOLTS PULLEY 208/230 187-253 414-506 414-506 MOTOR Using a jumper wire from unit control terminals R to G, engage motor operation. - Page 7 Push the motor and its mounting plate towards the blower Screw movable flange toward fixed flange to increase housing as close as possible to reduce the center distance speed and away from fixed flange to decrease speed. between fan shaft and motor shaft. Increasing fan speed increases load on motor.
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Page 8: Heat Pump Refrigeration System
Periodic cleaning with Totaline Environmentally Sound Coil ® Cleaner is essential in extending the life of coils. This cleaner is available from Carrier Replacement Components Division WARNING (part number P902-0301 for one gallon [3.8L] container, and UNIT OPERATION AND SAFETY HAZARD part number P902-0305 for a 5 gallon [19L] container). - Page 9 Remove screws securing coil to compressor plate and Mix Totaline Environmentally Sound Coil Cleaner in a compressor access panel. 2.5 gal (9.5L) garden sprayer according to the instructions Clean the outer surfaces with a stiff brush in the normal included with the cleaner. The optimum solution tempera- manner.
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Page 10: Reversing Valve And Checking Valve Position
Filter LPS/LOC Drier Cooling Liquid Line Check Valve DFT 1 Acutrol Acutrol Accurater (all 3, 4, and 5 ton units) Indoor Coil Outdoor Coil Strainer Accurater Heating Mode Liquid Line (3 and 4 ton units only) * Schematic shown in Heating Mode. Fig. - Page 11 Cooling Mode Liquid Line Heating Mode Liquid Line Accurater Accurater NOTE: 1. This unit has two Accuraters (one in each liquid line, for cooling and heating modes, respectively). 2. While in cooling mode, the liquid line header has Accutrol in each feeder tube. Fig.
- Page 12 Cooling Mode Liquid Line Heating Mode Liquid Line NOTE: While in cooling mode, the liquid line header has Accutrol in each feeder tube. Fig. 16 — Typical Metering Diagram for 50KCQ06 Evaporator...
- Page 13 Feeder Tube Liquid Header Feeder Tubes Feeder Tube Feeder Tube Feeder Tube Feeder Tube NOTE: In heating mode, the liquid header on the condenser coil has Accutrol in each feeder tube. Fig. 17 — Typical Condenser Coil Metering Diagram...
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Page 14: Refrigerant System Pressure Access Ports
The compressor is in a Puron (R-410A) refrigerant system and ® plate. Refer to Carrier Publication, GTAC2-5 Charging, Recov- uses a polyolester (POE) oil. This oil is extremely hygroscopic, ery, Recycling and Reclamation Training Manual and the fol- meaning it absorbs water readily. POE oils can absorb 15 times... - Page 15 Cooling Charging Chart 3 Ton Heat Pump R-410A Refrigerant 1241 OUTDOOR 1172 °F / °C 115 / 46 1103 105 / 41 95 / 35 85 / 29 1034 75 / 24 65 / 18 °F °C -1.1 12.8 15.6 18.3 21.1 23.9 26.7 29.4 32.2 SUCTION LINE TEMPERATURE 48KC000265 Rev - Fig.
- Page 16 CHARGING CHART - R-410A REFRIGERANT COOLING MODE - OUTDOOR FAN MUST BE RUNNING 1241 1172 OUTDOOR TEMP °F / °C 1103 115 / 46 105 / 41 95 / 35 1034 85 / 29 75 / 24 65 / 18 -1.1 10.0 12.8 15.6 18.3 21.1 23.9 26.7 29.4 32.2 Suction Line Temperature (°F / °C)
- Page 17 CHARGING CHART - R-410A REFRIGERANT COOLING MODE - OUTDOOR FAN MUST BE RUNNING 1241 1172 OUTDOO OUTDOO OUTDOO OUTDOO OUTDOO OUTDOOR TEMP TEMP TEMP TEMP TEMP TEMP 1103 °F / °C °F / °C °F / °C °F / °C °F / °C °F / °C 115 / 46...
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Page 18: Replacing The Compressor
Energize the compressor. Replacing the Compressor The suction pressure should drop and the discharge pres- sure should rise, as is normal on any start-up. WARNING NOTE: If the suction pressure does not drop and the discharge pressure does not rise to normal levels: FIRE, EXPLOSION HAZARD Note that the evaporator fan is probably also rotating in Failure to follow this warning could result in death, serious... - Page 19 Table 6 — Heating and Cooling Troubleshooting PROBLEM CAUSE REMEDY Power failure. Call power company. Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. Determine root cause. Defective thermostat, contactor, transformer, control Replace component. relay, or capacitor. Compressor and Insufficient line voltage.
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Page 20: Convenience Outlets
with the gasket; tighten the two screws until snug (do not CONVENIENCE OUTLETS over-tighten). Mount the weatherproof cover to the backing plate as shown in Fig. 24. WARNING Remove two slot fillers in the bottom of the cover to per- ELECTRICAL OPERATION HAZARD mit service tool cords to exit the cover. -
Page 21: Heat Pump Controls
CUT FOR CUT FOR REHEAT/HP REHEAT/HP FOR PMR CUT FOR REMOTE SHUTDOWN REMOTE SHUTDOWN T-STAT OCCUPANCY SMOKE SHUT- DOWN UNIT CONNECT PRIMARY TRANSFORMER VOLTAGE CONNECTIONS TERMINALS L1: RED +YEL H1 + H3 CUT FOR 208, 230 SMOKE L2: BLU + GRA H2 + H4 DETECTOR L1: RED... -
Page 22: Commercial Defrost Control
LOSS OF CHARGE SWITCH OUTDOOR FAN MOTOR PROTECTION The system is protected against a loss of charge and low evapo- The outdoor fan motor is internally protected against over- rator coil loading condition by a loss of charge switch located temperature. -
Page 23: Reversing Valve Control
Table 8 — 50KCQ Defrost Board I/O and Jumper Configurations CONNECTION POINT NAME TYPE OF I/O UNIT CONNECTION NOTE PIN NUMBER INPUTS G Fan DI, 24 vac P2-3 LCTB-G Y1 Cool 1 DI, 24 vac P2-5 LCTB-Y1 Y2 Cool 2 DI, 24 vac P2-4 LCTB-Y2... -
Page 24: Defrost Thermostats
Table 9 — Dip Switch Position SWITCH NO. · · · · · · · · 90 minutes 60 minutes 30 minutes 120 minutes Fan Delay Defrost Thermostats DISCONNECT MOUNTING These are temperature switches that monitor the surface tem- LOCATION perature of the outdoor coil circuits. -
Page 25: Single Point Boxes And Supplementary Fuses
Table 10 — Heater Model Number Bare heater model number Heater Sale Package PNO Includes: Bare Heater Carton and packing materials Installation sheet Single Point Boxes and Supplementary Fuses When the unit MOCP device value exceeds 60A, unit-mounted supplementary fuses are required for each heater circuit. These fuses are included in accessory single point boxes, with power PILOT--- CIRCUIT/MANUAL distribution and fuse blocks. -
Page 26: Smoke Detectors
System The smoke detector system consists of a four-wire controller and DEFROST BOARD one or two sensors. Its primary function is to shut down the roof- top unit in order to prevent smoke from circulating throughout the building. It is not to be used as a life saving device. Controller E-HEAT The controller (see Fig. -
Page 27: Smoke Detector Locations
Duct Smoke Sensor Exhaust Tube Exhaust Gasket Sensor Housing and Electronics See Detail A Intake Gasket Cover Gasket (ordering option) TSD-CO2 SMOKE DETECTOR (ordering option) Sensor Cover SENSOR Plug Sampling Tube Fig. 41 — Typical Supply-Air Smoke Detector (ordered separately) Sensor Location Coupling RETURN AIR WITHOUT ECONOMIZER... -
Page 28: Completing Installation Of Return-Air Smoke
FIOP Smoke Detector Wiring and Response All units: FIOP smoke detector is configured to automatically shut down all unit operations when smoke condition is detect- ed. See Fig. 46, Typical Smoke Detector System Wiring. HIGHLIGHT A: JMP 3 is factory-cut, transferring unit control to smoke detector. HIGHLIGHT B: Smoke detector NC contact set will open on smoke alarm con- dition, de-energizing the ORN conductor. -
Page 29: Sensor And Controller Tests
Fig. 46 — Typical Smoke Detector Wiring Sensor and Controller Tests See Table 11. IMPORTANT: OPERATIONAL TEST ALERT SENSOR ALARM TEST The sensor alarm test checks a sensor’s ability to signal an Failure to follow this ALERT can result in an unnecessary alarm state. - Page 30 Table 11 — Detector Indicators CONTROL OR INDICATOR DESCRIPTION Resets the sensor when it is in the alarm or trouble state. Activates or tests the sensor when it is in the normal Magnetic test/reset switch state. Alarm LED Indicates the sensor is in the alarm state. Trouble LED Indicates the sensor is in the trouble state.
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Page 31: Indicators
Squeeze the retainer clips on both sides of the optic hous- ing then lift the housing away from the printed circuit board. SMOKE DETECTOR Gently remove dirt and debris from around the optic plate CONTROLLER and inside the optic housing. −... -
Page 32: Premierlink Control
Replace sensor assembly. Sensor’s Power LED is Off: Check the controller’s Power LED. If it is off, determine TROUBLE why the controller does not have power and make the nec- ALARM POWER essary repairs. POWER TROUBLE Check the wiring between the sensor and the controller. If ALARM RESET wiring is loose or missing, repair or replace as required. -
Page 33: Economizer Systems
ECONOMIZER SYSTEMS ECONOMI$ER IV CONTROLLER The 50KC units may be equipped with a factory-installed or accessory (field-installed) economizer system. Three types are OUTSIDE AIR WIRING available: with a logic control system (EconoMi$er IV and TEMPERATURE SENSOR HARNESS EconoMi$er X) and without a control system (EconoMi$er2). LOW AMBIENT See Fig. - Page 34 Fig. 53 — RTU Open Overlay for Economizer Wiring...
- Page 35 Fig. 54 — VFD Overlay for W2770 Controller Wiring...
- Page 36 Fig. 55 — EconoMi$er IV Wiring BLACK TRANSFORMER GROUND BLUE 500 OHM RESISTOR VIOLET PINK OAT SENSOR ACTULATOR FEEDBACK (2-10VDC) ORANGE ACTULATOR WHITE DIRECT DRIVE 4-20mA SIGNAL CONTROL ACTUATOR (4-20mA) ECONOMI$ER2 PLUG Fig. 56 — EconoMi$er2 with 4 to 20 mA Control Wiring...
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Page 37: Economi$Er Iv
The outdoor-air temperature is used to determine when the An EconoMi$er IV simulator program is available from Carrier EconoMi$er IV can be used for free cooling. The sensor is fac- to help with EconoMi$er IV training and troubleshooting. - Page 38 ECONOMI$ER IV CONTROL MODES Table 14 — Thermistor Resistance vs Temperature Values for Space Temperature Sensor, Supply Air IMPORTANT: The optional EconoMi$er2 does not include Temperature Sensor, and Outdoor Air a controller. The EconoMi$er2 is operated by a 4 to 20 mA Temperature Sensor signal from an existing field-supplied controller.
- Page 39 changeover control, turn the enthalpy set point potentiometer fully clockwise to the D setting. (See Fig. 59.) LED ON Outdoor Enthalpy Changeover For enthalpy control, accessory enthalpy sensor (part number HH57AC078) is required. Replace the standard outdoor dry LED ON LED OFF bulb temperature sensor with the accessory enthalpy sensor in the same mounting location.
- Page 40 duct. The EconoMi$er IV controller compares the outdoor air damper position maintains the minimum airflow into the build- enthalpy to the return air enthalpy to determine EconoMi$er IV ing during the occupied period. use. The controller selects the lower enthalpy air (return or out- When using demand ventilation, the minimum damper position door) for cooling.
- Page 41 24-v signal from terminal N), the EconoMi$er IV will be in Table 15.) unoccupied mode. Use setting 1 or 2 for Carrier equipment. (See Table 15.) Demand Control Ventilation (DCV) Press Clear and Mode buttons. Hold at least 5 seconds When using the EconoMi$er IV for demand controlled ventila- until the sensor enters the Edit mode.
- Page 42 NOTE: This procedure requires a 9-v battery, 1.2 kilo-ohm resis- Turn the DCV set point potentiometer CW until the DCV tor, and a 5.6 kilo-ohm resistor which are not supplied with the LED turns off. The DCV LED should turn off when the EconoMi$er IV.
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Page 43: Economi$Er X (Factory Option)
User Interface ® Economi$er X (Factory Option) Provides status for normal operation, setup parameters, check- The EconoMi$er X system is an expandable economizer con- out tests, and alarm and error conditions with a 2-line 16 char- trol system, which includes a W7220 economizer module (con- acter LCD display and four button keypad. - Page 44 Storage Temperature Table 16 — Economizer Module - Left Hand Terminal –40°F to 150°F (–40°C to 65°C) Blocks Shipping Temperature LABEL TYPE DESCRIPTION –40°F to 150°F (–40°C to 65°C) Top Left Terminal Block Relative Humidity 20k NTC Mixed Air Temperature Sensor (Polarity 5% to 95% RH non-condensing and COM Insensitive Connection)
- Page 45 SENSOR (HOT) BLACK YELLOW ANALOG BROWN – ORANGE GREEN SWITCH POWER SUPPLY. PROVIDE DISCONNECT LABEL MEANS AND OVERLOAD PROTECTION AS REQUIRED. Fig. 69 — CO Sensor Wiring SWITCHES INTERFACE OVERVIEW This section describes how to use the EconoMi$er ® user inter- face for: •...
- Page 46 Press the ▲ button to increase (change) the displayed • CHECKOUT parameter value. • ALARMS Press the ▼ button to decrease (change) the displayed NOTE: Some parameters in the menus use the letters MA or parameter value. MAT, indicating a mixed air temperature sensor location before NOTE: When values are displayed, pressing and holding the the cooling coil.
- Page 47 Table 20 — W7220 Menu Structure* PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † FIRST STAGE COOLING DEMAND (Y1–IN) ECON 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...
- Page 48 Table 20 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † EXHAUST STAGE 2 RELAY OUTPUT Output of AUX1 O terminal Displays ON when damper position reaches programmed EXH2 OUT ON/OFF percentage set point.
- Page 49 Table 20 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † Display order = MM/DD/YY INSTALL 01/01/10 Setting order = DD, MM, then YY. UNITS DEG °F °F or °C Sets economizer controller in degrees Fahrenheit or Celsius CONV CONV = conventional;...
- Page 50 Table 20 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † NONE Used for alarm for when the DA air temperature is too high. Sets 70°F to 180°F DA HI ALM 80°F (27°C) upper range of alarm;...
- Page 51 Table 20 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † Check if outdoor temperature is below the LOW Temp Lockout on set point menu. Check if Mixed air temperature on STATUS FREEZE ALARM menu is below the Lo Set point on Advanced menu.
- Page 52 Table 22 — Dry Bulb 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...
- Page 53 Table 25 — Enthalpy Operation with DCV (CO Sensor) — 1 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE High 0-v/Off 0-v/Off Closed VENTMIN High 24-v/On 0-v/Off Closed VENTMIN High 24-v/On 24-v/On Closed...
- Page 54 Table 26 — Single Enthalpy and Dual Enthalpy High Limit Curves POINT P1 POINT P2 ENTHALPY TEMP. DRY TEMP. ENTHALPY HUMIDITY HUMIDITY CURVE BULB (F) DEWPOINT (F) (btu/lb/da) TEMP. (F) TEMP. (F) (%RH) (%RH) 28.0 36.8 66.3 80.1 26.0 39.6 63.3 80.0 24.0...
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Page 55: Pre-Start-Up
PRE-START-UP WARNING WARNING PERSONAL INJURY AND ENVIRONMENTAL HAZARD PERSONAL INJURY HAZARD Failure to follow this warning could cause personal injury Failure to follow this warning could result in personal inju- or death. ry or death. Relieve pressure and recover all refrigerant before system Follow recognized safety practices and wear approved repair or final unit disposal. - Page 56 RETURN-AIR FILTERS NOTE: When the compressor is rotating in the wrong direction, the unit will make an elevated level of noise and will not provide Ensure the correct filters are installed in the unit (see cooling. Appendix B - Physical Data on page 59). Do not operate unit without return-air filters in place.
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Page 57: Start-Up, Premierlink
Touch Pilot are portable interface devices that allow the user to change system set-up and setpoints from a zone sensor or terminal NOTICE control module. During start-up, the Carrier software can also be SET-UP INSTRUCTIONS used to verify communication with PremierLink controller. -
Page 58: Appendix A - Model Number Nomenclature
APPENDIX A — MODEL NUMBER NOMENCLATURE 11 12 13 15 16 17 18 Packaging and Seismic Compliant 0 = Standard Unit/Series Model 1 = LTL 50KC – Packaged 14 SEER Rooftop Electrical Options A = None C = Non-Fused Disconnect D = Thru-the-Base Connections Q = Heat Pump F = Non-Fused Disconnect and Thru-the-Base Connections... -
Page 59: Appendix B - Physical Data
APPENDIX B — PHYSICAL DATA Table B — PHYSICAL DATA (Cooling) 3-5 Tons 50KCQ*A04 50KCQ*A05 50KCQ*A06 Refrigeration System # Circuits / # Comp. / Type 1 / 1 / Scroll 1 / 1 / Scroll 1 / 1 / Scroll R-410A charge A/B (lbs-oz) 14 - 8 / - 18 - 0 / -... -
Page 60: Appendix C - Fan Performance
Tabular data accounts for pressure loss due to clean filters, unit casing, and wet coils. Factory options and accessories can add static pressure losses. The Fan Performance tables offer motor/drive recommendations. In cases when two motor/drive combinations would work, Carrier recommends the lower horsepower option. - Page 61 APPENDIX C — FAN PERFORMANCE Table C — 50KCQ A04 DIRECT DRIVE, 3 TON Table D — 50KCQ A04 DIRECT DRIVE, 3 TON (HORIZONTAL SUPPLY) (VERTICAL SUPPLY) SPEED SPEED (TORQUE) (TORQUE) 0.57 0.25 0.44 0.19 0.47 0.24 0.34 0.18 1050 0.37 0.22 1050...
- Page 62 APPENDIX C — FAN PERFORMANCE Table E — 50KCQ A05 DIRECT DRIVE, 4 TON Table F — 50KCQ A05 DIRECT DRIVE, 4 TON (HORIZONTAL SUPPLY) (VERTICAL SUPPLY) SPEED SPEED (TORQUE) (TORQUE) 1200 0.93 0.48 1200 0.87 0.43 1300 0.80 0.46 1300 0.73 0.41...
- Page 63 APPENDIX C — FAN PERFORMANCE Table G — 50KCQ A06 DIRECT DRIVE, 5 TON Table H — 50KCQ A06 DIRECT DRIVE, 5 TON (HORIZONTAL SUPPLY) (VERTICAL SUPPLY) SPEED SPEED (TORQUE) (TORQUE) 1500 0.37 0.35 1500 0.27 0.32 1625 0.22 0.33 1625 0.13 0.30...
- Page 64 APPENDIX C — FAN PERFORMANCE Table I — 50KCQ A04 - 3 Ton Horizontal Supply AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.13 0.23 0.34 0.47 0.61 0.15 0.25 0.37 0.50 1015 0.64 1050 0.18 0.28 0.40 0.53 1030 0.68 1125 0.20 0.31 0.43...
- Page 65 APPENDIX C — FAN PERFORMANCE Table K — 50KCQ A05 - 4 TON HORIZONTAL SUPPLY AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 0.20 0.31 0.43 0.56 1030 0.70 1300 0.24 0.36 0.48 0.61 1052 0.76 1400 0.28 0.40 0.53 0.67 1075 0.82 1500...
- Page 66 APPENDIX C — FAN PERFORMANCE Table M — 50KCQ A06 - 5 TON HORIZONTAL SUPPLY AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 0.33 0.46 0.60 1023 0.75 1101 0.90 1625 0.40 0.54 0.68 1054 0.84 1131 1.00 1750 0.48 0.63 1004 0.78 1087...
- Page 67 APPENDIX C — FAN PERFORMANCE Table O — Fan RPM at Motor Pulley Settings MOTOR PULLEY TURNS OPEN MOTOR/DRIVE UNIT COMBO Medium static 1251 1208 1165 1121 1078 1035 3 phase High static 1466 1423 1380 1337 1294 1251 1207 1164 1121 1078...
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Page 68: Appendix D - Wiring Diagrams
APPENDIX D — WIRING DIAGRAMS Table P — Wiring Diagrams 50KCQ DRAWING NUMBER Size Voltage Control Power 208/230-1-60 48TM501435 (page 71) 208/230-3-60 48TM501434 (page 69) 48TM501436 (page 72) 460-3-60 48TM501515 (page 73) 575-3-60 48TM501520 (page 70) 48TM501516 (page 74) 208/230-1-60 48TM501435 (page 71) 208/230-3-60 48TM501434 (page 69) - Page 69 APPENDIX D — WIRING DIAGRAMS Fig. B — 50KCQ A04/A05/A06 Control Wiring Diagram (208/230-1-60; 208/230-3-60; 460-3-60)
- Page 70 APPENDIX D — WIRING DIAGRAMS Fig. C — 50KCQ A04/A05/A06 Control Wiring Diagram (575-3-60)
- Page 71 APPENDIX D — WIRING DIAGRAMS Fig. D — 50KCQ A04/A05/A06 Power Wiring Diagram (208/230-1-60)
- Page 72 APPENDIX D — WIRING DIAGRAMS Fig. E — 50KCQ A04/A05/A06 Power Wiring Diagram (208/230-3-60)
- Page 73 APPENDIX D — WIRING DIAGRAMS Fig. F — 50KCQ A04/A05/A06 Power Wiring Diagram (460-3-60)
- Page 74 APPENDIX D — WIRING DIAGRAMS Fig. G — 50KCQ A04/A05/A06 Power Wiring Diagram (575-3-60)
- Page 75 APPENDIX D — WIRING DIAGRAMS Fig. H — 50KCQ Premier Link Control Diagram...
- Page 76 APPENDIX D — WIRING DIAGRAMS Fig. I — 50KCQ RTU-Open Control Diagram...
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Page 77: Locations
APPENDIX E — MOTORMASTER SENSOR LOCATIONS Fig. J — 50KCQ A04 Outdoor Circuiting SENSOR LOCATION Fig. K — 50KCQ A05/A06 Outdoor Circuiting... - Page 78 © Carrier Corporation 2020 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500224-01 Printed in U.S.A. Form 50KCQ-4-6-01SM Pg 78 2-2020 Replaces: NEW...
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Page 79: Start-Up Checklist
START-UP CHECKLIST (Remove and Store in 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 sec- tions of this Installation Instruction document. - Page 80 9. Open humidistat input compressor and outdoor fan stop; LSV and DSV solenoids de-energized (Y/N) _____ 10. Restore set-points for thermostat and humidistat (Y/N) _____ © Carrier Corporation 2020 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
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