Page 1: Table Of Contents
Pre-Start and Start-Up ......45 • PAD-MOUNTED INSTALLATION START-UP CHECKLIST FOR 50HCQ12 SINGLE • FRAME-MOUNTED INSTALLATION PACKAGE ROOFTOP Step 3 —...
Page 2: Model Number Nomenclature And Dimensions
DANGER CAUTION ELECTRICAL SHOCK HAZARD PERSONAL INJURY HAZARD Failure to follow this warning will result in personal injury or Failure to follow this caution may result in personal injury. death. Sheet metal parts may have sharp edges or burrs. Use care and Before performing service or maintenance operations on unit, wear appropriate protective clothing, safety glasses and gloves turn off main power switch to unit and install lock(s) and lock-...
Page 3 6 = Electro-mechanical with W7220 Economizer 1 = 575/3/60 controller Controls. Can be used with W7220 5 = 208-230/3/60 EconoMi$er X (with Fault Detection and Diagnostic) 6 = 460/3/60 Design Revision – = Factory Design Revision Fig. 1 — 50HCQ12 Model Number Nomenclature (Example)
Page 4 Fig. 2 — Unit Dimensional Drawing — Size 12 Units...
Page 5 Fig. 2 — Unit Dimensional Drawing — Size 12 Units (cont)
Page 6: Refrigeration System Components
LOCATION DIMENSION CONDITION 48-in. (1219 mm) Unit disconnect is mounted on panel 18-in. (457 mm) No disconnect, convenience outlet option 18-in. (457 mm) Recommended service clearance 12-in. (305 mm) Minimum clearance 42-in. (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall) 36-in.
Page 7: Refrigerant System Pressure Access Ports
LPS/LOC Filter Drier Cooling Liquid Lines DFT 1 Acutrol Acutrol Reversing Valve DFT 2 Comp 2 Reversing Valve Indoor Coil Comp 1 Outdoor Coil Heating Mode Liquid Lines Strainer Fig. 4 — Typical Unit Piping Schematic SEAT CORE (Part No. EC39EZ067) 1/2-20 UNF RH 0.596 45°...
Page 8: Step 1 - Plan For Unit Location
3. Rig and place unit. Step 1 — Plan for Unit Location 4. Convert unit to side duct connection arrangement. Select a location for the unit and its support system (curb or other) 5. Install field-fabricated ductwork at unit duct openings. that provides for the minimum clearances required for safety (in- 6.
Page 9 Fig. 6 — Roof Curb Details...
Page 10: Step 5 - Field Fabricate Ductwork
CAUTION PROPERTY DAMAGE HAZARD Failure to follow this caution may result in damage to roofing materials. Membrane roofs can be cut by sharp sheet metal edges. Be careful when placing any sheet metal parts on such roof. UNITS WITH ACCESSORY ELECTRIC HEATERS All installations require a minimum clearance to combustible sur- faces of 1 in.
Page 11: Positioning On Curb
PLACE ALL GASKET IN PLACE BEFORE PLACING UNIT ON ROOF CURB. (914 - 1371) “B” 36” - 54” “C” DETAIL “A” DUCT END “A” SEE DETAIL “A” DIMENSIONS MAX WEIGHT UNIT 50HCQD12 2075 116.0 2945 58.5 1485 59.5 1510 NOTES: 1.
Page 12: Step 8 - Install Outside Air Hood
NOTCHES NOTCHES BASEPAN Fig. 11 — Location of Notches SCREWS FILTER ACCESS PANEL INDOOR COIL ACCESS PANEL Fig. 13 — Typical Access Panel Locations DUCT COVERS REMOVE SHEET METAL HOOD PARTS FACE UP CUT PLASTIC TIES (2) PLACES ECONOMIZER BASEPAN Fig.
Page 13: Economizer And Two-Position Hood Assembly
PANEL INDOOR COIL HOOD PARTS ACCESS PANEL SCREW PLASTIC TIE WRAP QTY (2) LEFT HOOD SIDE SCREWS FOR METAL TRAY QTY (2) HOOD DIVIDER Fig. 15 — Damper Assembly Fig. 17 — Economizer Hood Construction ECONOMIZER AND TWO-POSITION HOOD 3. Remove the shipping tape holding the economizer baro- ASSEMBLY metric relief damper in place (economizer only).
Page 14: Step 9 - Install External Condensate Trap And Line
Step 9 — Install External Condensate Trap and Step 10 — Make Electrical Connections Line The unit has one -in. condensate drain connection on the end of WARNING the condensate pan and an alternate connection on the bottom. See Fig. 19. Unit airflow configuration does not determine which ELECTRIC SHOCK HAZARD drain connection to use.
Page 15 Fig. 22 — Conduit into Control Box Fig. 25 — Mounting Position for Field Disconnects (up to 100A) All units except 208/230-v units are factory wired for the voltage shown on the nameplate. If the 208/230-v unit is to be connected to a 208-v power supply, the control transformer must be rewired by moving the black wire with the -in.
Page 16: All Units
Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. WARNING Such operation would invalidate any applicable Carrier warranty. FIRE HAZARD NOTE: Check all factory and field electrical connections for tight- ness.
Page 17: Convenience Outlets
6. Measure the tip of the shaft to the top surface of the Non-Powered Convenience Outlet pointer to be 3.75 to 3.88 in. (95 to 99 mm) for 80A and This type requires the field installation of a general-purpose 125v 100A NFD and 3.43 to 3.56 in.
Page 18: Factory-Option Thru-Base Connections
Installing Weatherproof Cover A weatherproof while-in-use cover for the factory-installed conve- nience outlets is now required by UL standards. This cover cannot be factory-mounted due its depth; it must be installed at unit instal- lation. For shipment, the convenience outlet is covered with a blank cover plate.
Page 19: Units Without Thru-Base Connections
The Central Terminal Board (CTB) is a pass through connection mierLink™ controller (available as factory-installed option or as point. The CTB provides the capability to add factory-installed field-installed accessory, for use on a Carrier Comfort Network ® options and field-installed accessories to the units by cutting...
Page 20 Reversing valve control The DFB has two outputs for unit reversing valve control. Opera- tion of the reversing valves is based on internal logic; this applica- tion does not use an “O” or “B” signal to determine reversing valve position. Reversing valves are energized during the cooling stages and the defrost cycle and de-energized during heating cy- cles.
Page 21 Table 6 — 50HCQ 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...
Page 22: Unit Without Thru-Base Connection Kit
Defrost The defrost control mode is a time/temperature sequence. There are two time components: The continuous run period and the test/ defrost cycle period. The temperature component is provided by Defrost Thermostat 1 and 2 (DFT1 and DFT2) mounted on the outdoor coil.
Page 23: Control And Power Wiring Diagrams
SINGLE HEATER MANUAL RESET POINT BOX COVERS LIMIT SWITCH DISCONNECT MOUNTING LOCATION SINGLE POINT HEATER HEATER HEATER MODULE MODULE MOUNTING MOUNTING (LOCATION 1) (LOCATION 2) BRACKET SCREW Fig. 39 — Typical Component Location Single Point Boxes Heater and Supplementary Fuses When heaters are installed, power wiring to both heaters and the When the unit MOCP device value exceeds 60-A, unit-mounted rest of the unit is connected via the single point box accessory,...
Page 24 NOTE: Optional Outdoor Temperature Control at One Heater Stage – Move either heater wire to this terminal and connect outdoor temperature switch between second and third terminals. Fig. 41 — Accessory Electric Heater Control Connections...
Page 25 Fig. 42 — Typical 50HCQ Control Wiring Diagram...
Page 26 Fig. 43 — Typical 50HCQ Power Wiring Diagram (208/230-3-60 unit shown)
Page 27 Fig. 44 — PremierLink™ Controller Wiring Schematic...
Page 28 Fig. 45 — RTU Open Controller System Wiring Diagram...
Page 29: Economi$Er® X (Factory Option)
ECONOMI$ER X (FACTORY OPTION) User Interface ® The interface provides status for normal operation, setup parame- The EconoMi$er X system is an expandable economizer control ters, checkout tests, and alarm and error conditions with a 2-line system, which includes a W7220 economizer module (controller) 16 character LCD display and four button keypad.
Page 30 Shipping Temperature Table 8 — Economizer Module - Left Hand Terminal Blocks –40 to 150°F (–40 to 65°C) LABEL TYPE DESCRIPTION Relative Humidity Top Left Terminal Block 5% to 95% RH non-condensing 20k NTC Mixed Air Temperature Sensor (Polarity Economizer Module Wiring Details and COM Insensitive Connection) Use Fig.
Page 31 S-Bus Sensor Wiring Sensor Wiring The labels on the sensors and controller are color coded for ease of When using a CO sensor the black and brown common wires are installation. Orange labeled sensors can only be wired to orange internally connected and only one is connected to “IAQ COM”...
Page 32 To use the keypad when working with Setpoints, System and Ad- vanced Settings, Checkout tests and Alarms: IMPORTANT: Table 12 illustrates the complete hierarchy. 1. Navigate to the desired menu. Your menu parameters may be different depending on your 2. Press the (Enter) button to display the first item in the configuration.
Page 33 Table 12 — 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 34 Table 12 — Menu Structure* (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT † OK/Alarm (on Alarm ACTUATOR Displays ERROR if voltage or torque is below actuator range. menu) EXHAUST STAGE 1 RELAY OUTPUT Output of EXH1 terminal: EXH1 OUT ON/OFF ON = relay closed...
Page 35 Table 12 — Menu Structure* (cont) PARAMETER PARAMETER 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 or C Sets economizer controller in degrees Fahrenheit or Celsius CONV = conventional;...
Page 36 Table 12 — Menu Structure* (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT † OUTSIDE AIR HUMIDITY CALIBRATION OA H CAL 0% RH ±10% RH Allows for operator to adjust for an out of calibration humidity sensor. RETURN AIR TEMPERATURE CALIBRATION RA T CAL 0.0°F...
Page 37 Table 12 — Menu Structure* (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT † When AUX1-O is set to SYS and there is any alarm (e.g., failed SYS ALARM sensors, etc.), the AUX1-O terminal has 24 Vac out. ACTUATOR VOLTAGE LOW ACT UNDER V Voltage received by actuator is above expected range.
Page 38 For damper minimum position settings and checkout menu read- ings, see Table 13. See Tables 14-21 for dry bulb and enthalpy se- quence of operation. Table 13 — Damper Minimum Position Settings and Readings on Checkout Menu DEMAND CONTROLLED VENTILATION FAN SPEED SETPOINTS CHECKOUT...
Page 39 Table 17 — Enthalpy Operation, with Demand Controlled Ventilation (DCV) (CO Sensor) — 1 Speed Fan OUTSIDE AIR GOOD TO Y1-I Y2-I FAN SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED ECONOMIZE? High 0-v/Off 0-v/Off VENTMIN Closed High 24-v/On 0-v/Off VENTMIN Closed High 24-v/On 24-v/On VENTMIN...
Page 40 Table 20 — Enthalpy Operation, No Demand Controlled Ventilation (DCV) (CO Sensor) — 2 Speed Fan OUTSIDE AIR GOOD TO Y1-I Y2-I FAN SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED ECONOMIZE? 0-v/Off 0-v/Off MIN POS L Closed 24-v/On 0-v/Off MIN POS L Closed High 24-v/On...
Page 41 ECONOMIZING DUAL ENTHALPY AVAILABLE HIGH LIMIT NOT AVAILABLE SINGLE ENTHALPY P2 (T,RH) (T,RH) TEMPERATURE Fig. 51 — Single Enthalpy Curve Boundaries Table 22 — Single Enthalpy and Dual Enthalpy High Limit Curves POINT P1 POINT P2 ENTHALPY TEMP. DRY TEMP. ENTHALPY HUMIDITY HUMIDITY...
Page 42: Smoke Detectors
NOTE: Upon power up, the module waits 60 minutes before checking for alarms. This allows time for all the configured devic- WARNING es (e.g. sensors, actuator) to become operational. The exception is the SAT sensor which will alarm immediately. ELECTRIC SHOCK HAZARD If one or more alarms are present and there has been no keypad ac- Failure to follow this warning could result in personal injury, tivity for at least 5 minutes, the Alarms menu displays and cycles...
Page 43: Premierlink™ (Factory Option)
CONTROLLER OPTIONS RETURN AIR Low Ambient SMOKE DETECTOR If the unit comes with Electro-Mechanical (EM) control, then no (AS SHIPPED) adjustment is necessary. If the unit comes with the RTU Open control option, then refer to its installation control manual for details on adjusting “Cooling Lock-Out”...
Page 44: Step 13 - Check Belt Tension
Fig. 54 — EconoMi$er IV Wiring Step 13 — Check Belt Tension Measure the belt span length as shown in Fig. 55. Calculate the re- BELT DEFLECTION FORCE - SEE TABLE 1 quired deflection by multiplying the belt span length by .
Page 45: Pre-Start And Start-Up
BLOWER PULLEY V-BELT MOTOR PULLEY MOTOR MOUNTING MOTOR MOUNTING BOLTS (4) PLATE Fig. 56 — Belt Drive Motor Mounting Pre-Start and Start-Up This completes the mechanical installation of the unit. Refer to the unit’s Service Manual for detailed Pre-Start and Start-Up instruc- tions.
Page 46 © 2020 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500282-01 Printed in U.S.A. Form 50HCQ-12-03SI Pg 46 5-2020 Replaces: 50HCQ-12-02SI...
Page 47: Start-Up Checklist For 50Hcq12 Single Package Rooftop Heat Pump (Remove And Use For Job File)
START-UP CHECKLIST FOR 50HCQ12 SINGLE PACKAGE ROOFTOP HEAT PUMP (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 sec- tions of this Installation Instruction document.
Page 48 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) _____ © 2020 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Carrier 50HCQ12 Installation Instructions Manual

Safety Considerations

Model Number Nomenclature and Dimensions

Rated Indoor Airflow

Refrigeration System Components

Reversing Valve and Check Valve Position

Troubleshooting Refrigerant Pressure Problems and Check Valves

Refrigerant System Pressure Access Ports

Installation

Jobsite Survey

Step 1 - Plan for Unit Location

Step 2 - Plan for Sequence of Unit Installation

Step 3 - Inspect Unit

Step 4 - Provide Unit Support

Step 5 - Field Fabricate Ductwork

Step 6 - Rig and Place Unit

Step 7 - Convert to Horizontal and Connect

Ductwork (When Required)

Step 8 - Install Outside Air Hood

Step 9 - Install External Condensate Trap and Line

Step 10 - Make Electrical Connections

Step 11 - Adjust Factory-Installed Options

Step 12 - Install Accessories

Step 13 - Check Belt Tension

Pre-Start and Start-Up

Start-Up Checklist for 50Hcq12 Single Package Rooftop Heat Pump (Remove and Use for Job File)

Start-Up Checklist

Quick Links

SAFETY CONSIDERATIONS

Related Manuals for Carrier 50HCQ12

Summary of Contents for Carrier 50HCQ12

Table of Contents