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Carrier WeatherMaker 50TCQ*08, Installation Instructions Manual

The Carrier WeatherMaker 50TCQ*08 is a top-notch HVAC system that ensures optimal comfort in any space. To ensure a seamless installation, we provide a comprehensive Installation Instructions Manual. You can easily download this manual for free from our website, enabling you to set up your system hassle-free.

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

Catalog No. 04-53500216-01

Printed in U.S.A.

Form 50TCQ-8-12-01SI

Pg 1 

1-19

Replaces: 50TCQ-8-9-03SI, 50TCQ-12-02SI

Installation Instructions

NOTE: Read the entire instruction manual before starting the

installation.

CONTENTS

SAFETY CONSIDERATIONS   . . . . . . . . . . . . . . . . . . 2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm)  . . . . . . . . . . . . . . . . . . . . 2
REFRIGERATION SYSTEM COMPONENTS   . . . . . . 9
Reversing Valve and Check Valve Position  . . . . . . 9
Troubleshooting Refrigerant Pressure Problems 

and Check Valves  . . . . . . . . . . . . . . . . . . . . . . . . . 9

Refrigerant System Pressure Access Ports  . . . . . . 9
INSTALLATION   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 1 — Plan for Unit Location   . . . . . . . . . . . . . . . 11

• ROOF MOUNT

Step 2 — Plan for Sequence of Unit Installation   . . 11

• CURB-MOUNTED INSTALLATION

• PAD-MOUNTED INSTALLATION

• FRAME-MOUNTED INSTALLATION

Step 3 — Inspect Unit  . . . . . . . . . . . . . . . . . . . . . . . . 12
Step 4 — Provide Unit Support   . . . . . . . . . . . . . . . . 12

• ROOF CURB MOUNT

• SLAB MOUNT (HORIZONTAL UNITS ONLY)

• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR 

SLAB MOUNT)

Step 5 — Field Fabricate Ductwork  . . . . . . . . . . . . . 14
Step 6 — Rig and Place Unit   . . . . . . . . . . . . . . . . . . 14

• POSITIONING ON CURB

Step 7 — Convert to Horizontal and Connect 

Ductwork (when required)  . . . . . . . . . . . . . . . . . . 15

Step 8 — Install Outside Air Hood  . . . . . . . . . . . . . . 16

• ECONOMIZER AND TWO-POSITION DAMPER HOOD 

PACKAGE REMOVAL AND SETUP (FACTORY 

OPTION)

• ECONOMIZER HOOD AND TWO-POSITION HOOD

Step 9 — Units with Hinged Panels Only   . . . . . . . . 17
Step 10 — Install External Condensate Trap and

Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Step 11 — Make Electrical Connections  . . . . . . . . . 18

• FIELD POWER SUPPLY

• UNITS WITH FACTORY-INSTALLED NON-FUSED 

DISCONNECT

• UNITS WITHOUT FACTORY-INSTALLED NON-

FUSED DISCONNECT

• ALL UNITS

• CONVENIENCE OUTLETS

• FACTORY-OPTION THRU-BASE CONNECTIONS

• UNITS WITHOUT THRU-BASE CONNECTIONS

• ALL UNITS

• FIELD CONTROL WIRING

• THERMOSTAT

Central Terminal Board  . . . . . . . . . . . . . . . . . . . . . .  26
Commercial Defrost Control  . . . . . . . . . . . . . . . . . .  26

• REVERSING VALVE CONTROL

• COMPRESSOR CONTROL

• AUXILIARY (ELECTRIC) HEAT CONTROL

• DEFROST

• UNIT WITHOUT THRU-BASE CONNECTION KIT

• HEAT ANTICIPATOR SETTINGS

Electric Heaters  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29

• SINGLE POINT BOXES AND SUPPLEMENTARY 

FUSES

• SINGLE POINT BOXES WITHOUT FUSES

• LOW-VOLTAGE CONTROL CONNECTIONS

EconoMi$er® X (Factory Option)  . . . . . . . . . . . . . .  31

• SYSTEM COMPONENTS

• SPECIFICATIONS

• INPUTS

• OUTPUTS

• ENVIRONMENTAL

• ECONOMIZER MODULE WIRING DETAILS

• INTERFACE OVERVIEW

• SETUP AND CONFIGURATION

• ENTHALPY SETTINGS

• CHECKOUT

• TROUBLESHOOTING

PremierLink™ (Factory Option)  . . . . . . . . . . . . . . .  41
RTU-Open Controller System (Factory-Installed

Option)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  41

Smoke Detectors  . . . . . . . . . . . . . . . . . . . . . . . . . . .  41

• COMPLETING INSTALLATION OF RETURN AIR 

SMOKE SENSOR

• ADDITIONAL APPLICATION DATA

Step 12 — Adjust Factory-Installed Options  . . . . .  42

• SMOKE DETECTORS

• ECONOMI$ER IV OCCUPANCY SWITCH

Step 13 — Install Accessories   . . . . . . . . . . . . . . . .  42
Step 14 — Check Belt Tension  . . . . . . . . . . . . . . . .  43

• BELT FORCE — DEFLECTION METHOD

• BELT TENSION METHOD

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

50TCQ units for installation in the United States contain use of Carrier's Staged Air Volume (SAV™) 2-speed 
indoor fan control system. This complies with the U.S. Department of Energy (DOE) efficiency standard 
of 2018.
50TCQ units for installation outside the United States may or may not contain use of the SAV 2-speed indoor 
fan control system, as they are not required to comply with the U.S. Department of Energy (DOE) efficiency 
standard of 2018.
For specific details on operation of the Carrier SAV 2-speed indoor fan system, refer to the Variable Frequency 
Drive (VFD) Factory-Installed Option 2-Speed Motor Control Installation, Setup and Troubleshooting manual.

WeatherMaker

®

50TCQ08-12

Single Package Rooftop with Heat Pump

with Puron

®

 (R-410A) Refrigerant

Summary of Contents for WeatherMaker 50TCQ*08

Page 1: ... CONNECTIONS UNITS WITHOUT THRU BASE CONNECTIONS ALL UNITS FIELD CONTROL WIRING THERMOSTAT Central Terminal Board 26 Commercial Defrost Control 26 REVERSING VALVE CONTROL COMPRESSOR CONTROL AUXILIARY ELECTRIC HEAT CONTROL DEFROST UNIT WITHOUT THRU BASE CONNECTION KIT HEAT ANTICIPATOR SETTINGS Electric Heaters 29 SINGLE POINT BOXES AND SUPPLEMENTARY FUSES SINGLE POINT BOXES WITHOUT FUSES LOW VOLTAG...

Page 2: ...ty damage NOTE is used to highlight suggestions which will result in enhanced installation reliability or operation GENERAL See Fig 1 3 for unit options and dimensions Rated Indoor Airflow cfm Table 1 lists the rated indoor airflow used for the AHRI effi ciency rating for the units covered in this document WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could cause personal injury o...

Page 3: ...i Protocol Controller 6 Electro mechanical with W7220 Economizer controller Controls Can be used with W7220 EconoMi er X with Fault Detection and Diagnostic Intake Exhaust Options A None B Temperature Economizer with Barometric Relief F Enthalpy Economizer with Barometric Relief K 2 Position Damper U Temperature Ultra Low Leak Economizer with Barometric Relief W Enthalpy Ultra Low Leak Economizer ...

Page 4: ...4 Fig 2 Unit Dimensional Drawing 08 and 09 Size Units ...

Page 5: ...5 Fig 2 Unit Dimensional Drawing 08 and 09 Size Units cont ...

Page 6: ...6 Fig 3 Unit Dimensional Drawing 12 Size Unit ...

Page 7: ...7 Fig 3 Unit Dimensional Drawing 12 Size Unit cont ...

Page 8: ... 457 mm Recommended service clearance 12 in 305 mm Minimum clearance B 42 in 1067 mm Surface behind servicer is grounded e g metal masonry wall 36 in 914 mm Surface behind servicer is electrically non conductive e g wood fiberglass Special Check sources of flue products within 10 ft of unit fresh air intake hood C 36 in 914 mm Side condensate drain is used 18 in 457 mm Minimum clearance D 42 in 10...

Page 9: ...s with black plastic caps The hose connection fittings are standard 1 4 in SAE male flare couplings The brass fittings are two piece High Flow valves with a re ceptacle base brazed to the tubing and an integral spring closed check valve core screwed into the base See Fig 7 on page 11 This check valve is permanently assembled into this core body and cannot be serviced separately Replace the entire ...

Page 10: ...n Check Valve B Closed Check Valve C Open Check Valve D Closed Table 4 Defrost Mode COMPONENT STATUS POSITION Defrost Thermostat Closed Outdoor Fan s Off Reversing Valve Energized Check Valve A Closed Check Valve B Open Check Valve C Closed Check Valve D Open COMPRESSOR ACCUMULATOR HPS COMPRESSOR ACCUMULATOR HPS Filter Drier 2B 1B LPS LOC Acutrol DFT 1 Cooling Liquid Lines DFT 2 2A 1A 1D 2D Outdoo...

Page 11: ...own in Table 5 Step 2 Plan for Sequence of Unit Installation The support method used for this unit will dictate different se quences for the steps of unit installation For example on curb mounted units some accessories must be installed on the unit before the unit is placed on the curb Review the following for recommended sequences for installation steps CURB MOUNTED INSTALLATION 1 Install curb 2 ...

Page 12: ... in air leaks and poor unit performance Curb should be level This is necessary for unit drain to func tion properly Unit leveling tolerances are shown in Fig 8 Re fer to Accessory Roof Curb Installation Instructions for addi tional information as required Fig 8 Unit Leveling Tolerances Install insulation cant strips roofing felt and counter flashing as shown Ductwork must be attached to curb and n...

Page 13: ...HOUT THE WRITTEN AUTHORIZATION OF CARRIER CORPORATION 1 DEC 2 DEC 3 DEC ANG MATERIAL AUTHORIZATION NUMBER TITLE 1029120 CURB ASY ROOF ENGINEERING MANUFACTURING ENGINEERING REQUIREMENTS SIZE DRAWING NUMBER REV T 005 Y 002 DRAFTER CHECKER D 50HJ405012 C WEIGHT MMC 12 16 09 SHEET 5 OF 5 SURFACE FINISH MFG PURCH MODEL INTERNAL USE ONLY NEXT DRAWING SCALE DISTRIBUTION PURCH N A NOTES 1 ROOFCURB ACCESSO...

Page 14: ...xternal Condensate Trap and Line on page 17 Before setting the unit onto the curb recheck gasketing on curb POSITIONING ON CURB Position unit on roof curb so that the following clearances are maintained 1 4 in 6 4 mm clearance between the roof curb and the base rail inside the front and rear 0 0 in clearance be tween the roof curb and the base rail inside on the duct end of the unit This will resu...

Page 15: ...l duct tape Field supplied flanges should be attached to horizontal duct openings and all ductwork should be secured to the flanges In sulate and weatherproof all external ductwork joints and roof or building openings with counter flashing and mastic in accor dance with applicable codes Do not cover or obscure visibility to the unit s informative data plate when insulating horizontal ductwork Fig ...

Page 16: ...haust accessory is to be installed on the unit the hood shipped with the unit will not be used and must be discarded Save the aluminum filter for use in the power exhaust hood assembly 1 The indoor coil access panel will be used as the top of the hood Remove the screws along the sides and bottom of the indoor coil access panel See Fig 17 2 Swing out indoor coil access panel and insert the hood sid...

Page 17: ...his before setting the unit in place The red drain pan can be tightened with a 1 2 in square socket drive extension To use the alternate bottom drain connection remove the red drain plug from the bottom connection use a 1 2 in square sock et drive extension and install it in the side drain connection The piping for the condensate drain and external trap can be completed after the unit is in place ...

Page 18: ...ld power wires are connected to the unit at line side pres sure lugs on compressor contactor C and indoor fan contactor IFC or terminal board see wiring diagram label for control box component arrangement or at factory installed option non fused disconnect switch Max wire size is 2 AWG copper on ly See Fig 24 NOTE TEST LEADS Unit may be equipped with short leads pigtails on the field line connecti...

Page 19: ...19 Fig 25 Typical 50TCQ Control Wiring Diagram Sizes 08 09 ...

Page 20: ...20 Fig 26 Typical 50TCQ Control Wiring Diagram Size 12 ...

Page 21: ...21 Fig 27 50TCQ 08 09 Power Wiring Diagram ...

Page 22: ...22 Fig 28 Typical 50TCQ 12 Power Wiring Diagram 208 230 v 3 Phase 60Hz Unit Shown ...

Page 23: ...Assembly for NFD UNITS WITHOUT FACTORY INSTALLED NON FUSED DISCONNECT When installing units provide a disconnect switch per NEC National Electrical Code of adequate size Disconnect sizing data is provided on the unit informative plate Locate on unit cabinet or within sight of the unit per national or local codes Do not cover unit informative plate if mounting the disconnect on the unit cabinet ALL...

Page 24: ...l box access panel See Fig 31 The primary leads to the convenience outlet transformer are not factory connected Selection of primary power source is a customer option If local codes permit the transformer primary leads can be connected at the line side terminals on the unit mounted non fused disconnect switch or HACR breaker switch this will provide service power to the unit when the unit disconne...

Page 25: ... appropriate conduits Connect the power conduit to the internal disconnect if unit is so equipped or to the external disconnect through unit side panel A hole must be field cut in the main control box bottom on the left side so the 24 v control connec tions can be made Connect the control power conduit to the unit control box at this hole UNITS WITHOUT THRU BASE CONNECTIONS 1 Install power wiring ...

Page 26: ...nstallation instructions for additional features which might require additional conductors in the cable For wire runs up to 50 ft 15 m use no 18 AWG American Wire Gage insulated wire 35 C 95 F minimum For 50 to 75 ft 15 to 23 m use no 16 AWG insulated wire 35 C 95 F minimum For over 75 ft 23 m use no 14 AWG in sulated wire 35 C 95 F minimum All wire sizes larger than no 18 AWG cannot be directly c...

Page 27: ...th one or two auxiliary electric heaters to provide a second stage of heating The DFB will energize this Heating System for a Stage 2 Heating Com mand heaters operate concurrently with compressor s in the Stage 1 Heating cycle for an Emergency Heating sequence compressors are off and only the electric heaters are ener gized and also during the Defrost cycle to eliminate a cold blow condition in th...

Page 28: ...Q 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 CTB G Y1 Cool 1 DI 24 vac P2 5 CTB Y1 Y2 Cool 2 DI 24 vac P2 4 CTB Y2 W1 Heat 1 DI 24 vac P2 7 CTB W1 W2 Heat 2 DI 24 vac P2 6 CTB W2 R Power 24 vac P3 1 CONTL BRD 8 C Common 24 vac P3 2 CONTL BRD 4 DFT 1 DI 24 vac DFT 1 to DFT 1 DFT 2 DI 24 vac DFT 2 to DFT 2...

Page 29: ...are marked with heater model numbers But heat ers are ordered as and shipped in cartons marked with a corre sponding heater sales package part number See Table 8 for correlation between heater model number and sales package part number NOTE The value in position 9 of the part number differs be tween the sales package part number value is 1 or 3 and a bare heater model number value is 0 Fig 42 Typi...

Page 30: ...control leads from the heater module s VIO and BRN two of each if two modules are installed to the 4 pole terminal board TB4 located on the heater bulkhead to the left of Heater 1 Except for CRHEATER128B00 129B00 connect the VIO leads from Heater 1 and Heater 2 to terminal TB4 1 Connect the BRN leads to terminal TB4 3 See Fig 46 For CRHEATER128B00 129B00 only Connect the ORN lead from HR1 Heater R...

Page 31: ...s are available with bus sensors User Interface Provides status for normal operation setup parameters check out tests and alarm and error conditions with a 2 line 16 char acter LCD display and four button keypad Electrical Rated Voltage 20 to 30 vac RMS 50 60 Hz Transformer 100 va maximum system input Nominal Power Consumption at 24 vac 60 Hz 11 5 VA without sensors or actuators Relay Digital Outp...

Page 32: ...le Left Hand Terminal Blocks LABEL TYPE DESCRIPTION Top Left Terminal Block MAT MAT 20k NTC and COM Mixed Air Temperature Sensor Polarity Insensitive Connection OAT OAT 20k NTC and COM Outdoor Air Temperature Sensor Polarity Insensitive Connection S BUS S BUS S BUS Sylk Bus Enthalpy Control Sensor Polarity Insensitive Connection Bottom Left Terminal Block IAQ 2 10 2 10 vdc Air Quality Sensor Input...

Page 33: ...hrough the menus and menu items select menu items and to change parameter and configuration settings To use the keypad when working with menus Press the Up arrow button to move to the previous menu Press the Down arrow button to move to the next menu Press the Enter button to display the first item in the currently displayed menu Press the Menu Up Exit button to exit a menu s item and return to th...

Page 34: ...3 W7220 Menu Structure MENU PARAMETER PARAMETER DEFAULT VALUE PARAMETER RANGE AND INCREMENT EXPANDED PARAMETER NAME Notes STATUS ECON AVAIL NO YES NO FIRST STAGE COOLING DEMAND Y1 IN YES economizing available the system can use outside air for free cooling when required ECONOMIZING NO YES NO FIRST STAGE COOLING RELAY OUTPUT YES outside air being used for first stage cooling OCCUPIED NO YES NO OCCU...

Page 35: ...f AUX1 O terminal displays only if AUX1 O ERV ON 24 vac output OFF No Output MECH COOL ON or HEAT STAGES ON 0 0 1 or 2 Displays stage of mechanical cooling that is active Displays the stage of heat pump heating that is active FAN SPEED N A LOW or HIGH SUPPLY FAN SPEED Displays speed setting of fan on a 2 speed fan unit W HEAT IN N A ON OFF HEAT DEMAND STATUS Displays status of heat demand on a 2 s...

Page 36: ...grees Fahrenheit or Celsius EQUIPMENT CONV CONV or HP CONV conventional HP O B Enable Heat Pump mode Use AUX2 I for Heat Pump input from thermostat or controller AUX2 IN W Shutdown SD Heat W1 HP O HP B In CONV mode SD Enables configuration of shutdown default W Informs controller that system is in heating mode In HP O B mode HP O energize heat pump on Cool default HP B energize heat pump on heat F...

Page 37: ...lows for the operator to adjust for an out of calibration temperature sensor RA H CAL 0 RH 10 RH RETURN AIR HUMIDITY CALIBRATION Allows for operator to adjust for an out of calibration humidity sensor DA T CAL 0 0 F 2 5 F DISCHARGE AIR TEMPERATURE CALIBRATION Allows for the operator to adjust for an out of calibration temperature sensor 2SP FAN DELAY 5 Minutes 0 to 20 minutes in 1 minute increment...

Page 38: ...or has failed or become disconnected check wiring then replace sensor if the alarm continues RA SYLK H ERR N A N A DA SYLK T ERR N A N A DISCHARGE AIR S BUS SENSOR ERROR Discharge air sensor has failed or become disconnected check wiring then replace sensor if the alarm continues OA SENS T ERR N A N A OUTSIDE AIR TEMPERATURE SENSOR ERROR Outdoor air temperature sensor has failed or become disconne...

Page 39: ... Open Closed to Full Open Table 16 Dry Bulb Operation With DCV CO2 Sensor 1 Speed Fan DEMAND CONTROLLED VENTILATION DCV OUTSIDE AIR GOOD TO ECONOMIZE Y1 I Y2 I FAN SPEED Y1 O Y2 O OCCUPIED UNOCCUPIED Below CO2 set No Off Off High 0 v Off 0 v Off VENTMIN Closed On Off High 24 v On 0 v Off VENTMIN Closed On On High 24 v On 24 v On VENTMIN Closed Yes Off Off High 0 v Off 0 v Off VENTMIN Closed On Off...

Page 40: ...ood to economize and the mode is set to NO Figure 53 shows the 5 current boundaries There is also a high lim it boundary for differential enthalpy The high limit boundary is ES1 when there are no stages of mechanical cooling energized and HL high limit when a compressor stage is energized Fig 53 Single Enthalpy Curve Boundaries Table 18 Enthalpy Operation With DCV CO2 Sensor 1 Speed Fan DEMAND CON...

Page 41: ... minutes the Alarms menu displays and cycles through the active alarms You can also navigate to the Alarms menu at any time Clearing Alarms Once the alarm has been identified and the cause has been re moved e g replaced faulty sensor the alarm can be cleared from the display To clear an alarm perform the following 1 Navigate to the desired alarm 2 Press the Enter button ERASE displays 3 Press the ...

Page 42: ...d through a connection on the Central Terminal Board If external occupancy control is desired connect a time clock or remotely controlled switch closed for Occupied open for Unoc cupied sequence at terminals marked OCCUPANCY on CTB Remove or cut jumper JMP 2 to complete the installation Step 13 Install Accessories Available accessories include Roof curb Thru base connection kit must be installed b...

Page 43: ...wnward on the belt until the large O ring is at the bottom of the straightedge 4 Adjust the belt tension as needed Adjust belt tension by loosing the motor mounting plate front bolts and rear bolt see Fig 58 and slide the plate towards the fan to reduce tension or away from the fan to increase tension Ensure the blower shaft and motor shaft are parallel to each other pulleys aligned Tighten all bo...

Page 44: ...LT TENSION METHOD Requires belt tension gage that measures tension in belt in units of lbs force Fig 58 Belt Drive Motor Mounting BLOWER PULLEY V BELT MOTOR PULLEY MOTOR MOTOR MOUNTING PLATE MOUNTING BOLTS 4 ...

Page 45: ......

Page 46: ...ntinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53500216 01 Printed in U S A Form 50TCQ 8 12 01SI Pg 46 1 19 Replaces 50TCQ 8 9 03SI 50TCQ 12 02SI Carrier Corporation 2019 ...

Page 47: ...t outdoor air inlet screens are in place Y N _____ Verify that unit is level Y N _____ Check fan wheels and propeller for location in housing orifice and verify setscrew is tight Y N _____ Verify that fan sheaves are aligned and belts are properly tensioned Y N _____ Verify that scroll compressors are rotating in the correct direction Y N _____ Verify installation of thermostat Y N _____ III START...

Page 48: ...reheat coil _______________ F E Confirm correct rotation for compressor Y N _____ F Check for correct ramp up of outdoor fan motor as condenser coil warms Y N _____ 4 Check unit charge per charging chart Y N _____ Jumper 32L Motormaster temperature sensor during this check Remove jumper when complete 5 Switch unit to high latent mode sub cooler by closing humidistat with Y1 closed Y N _____ OBSERV...

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