Page 1: Table Of Contents
50HCQ07-09 Single Package Rooftop Heat Pump with Puron ® (R-410A) Refrigerant Installation Instructions • UNITS WITHOUT THRU-BASE CONNECTIONS CONTENTS (ELECTRICAL CONNECTIONS) Page • FIELD CONTROL WIRING SAFETY CONSIDERATIONS ....1 •...
Page 2: Model Number Nomenclature
RATED INDOOR AIRFLOW MODEL NUMBER and lockout tag(s). Ensure electrical service to rooftop unit (CFM) agrees with voltage and amperage listed on the unit rating 50HCQA07 2400 plate. Unit may have more than one power switch. 50HCQD07 2400 50HCQD08...
Page 3 Position: 9 10 11 12 13 14 15 16 17 18 Example: – Unit/Series/Model Packaging Options 50HCQ - Packaged Rooftop Heat Pump 0 - Standard 1 - LTL Refrig. Systems Options A - One Stage Cooling Models Electrical Options D - Two Stage Cooling Models A - None C - Non-Fused Disconnect D - Thru-The-Base Connections...
Page 4 Fig. 2 — Unit Dimensional Drawing — 07-08 Size Units...
Page 5 Fig. 2 — Unit Dimensional Drawing — 07-08 Size Units (cont)
Page 6 Fig. 3 — Unit Dimensional Drawing — 09 Size Units...
Page 7 Fig. 3 — Unit Dimensional Drawing — 09 Size Units (cont)
Page 8: Installation
INSTALLATION Step 1 — Plan for Unit Location Select a location for the unit and its support system (curb or Jobsite Survey other) that provides for the minimum clearances required for Complete the following checks before installation. safety (including clearance to combustible surfaces), unit per- Consult local building codes and the NEC (National Elec- formance and service access below, around and above unit as specified in unit drawings.
Page 9: Step 1 - Plan For Unit Location
ROOF MOUNT Locate the carton containing the outside air hood parts. Do not remove carton until unit has been rigged and located in final Check building codes for weight distribution requirements. position. Unit operating weight is shown in Table 2. Step 4 —...
Page 10 Fig. 5 — Roof Curb Details...
Page 11: Step 5 - Field Fabricate Ductwork
WARNING Failure to follow this warning could cause personal injury. For vertical supply and return units, tools or parts could drop into ductwork and cause an injury. Install a 90-degree turn in the return ductwork between the unit and the condi- tioned space.
Page 12: Step 7 - Convert To Horizontal And Connect Ductwork (When Required)
"B" DETAIL "A" 36"- 54" PLACE ALL SEAL STRIP IN PLACE REQUIRED (914-1371) BEFORE PLACING UNIT ON ROOF CURB. SPREADER BARS DUCT END "C" "A" SEE DETAIL "A" DIMENSIONS MAX WEIGHT UNIT 50HCQA,D07 1100 88.0 2235 40.8 1035 41.5 1055 50HCQD08 1315 88.0...
Page 13: Step 8 - Install Outside Air Hood
SCREWS REMOVE HOOD PARTS CUT PLASTIC TIES (2) PLACES ECONOMIZER DUCT COVERS SHEET METAL FACE UP BASEPAN Fig. 12 — Economizer Wiring TWO-POSITION DAMPER HOOD REMOVAL AND SETUP (FACTORY OPTION) The hood is shipped in knock-down form and assembled to a metal support tray using plastic stretch wrap.
Page 14: Economizer And Two-Position Hood Assembly
ECONOMIZER AND TWO-POSITION HOOD Caulk the ends of the joint between the unit top panel and ASSEMBLY the hood top. Replace the filter access panel. NOTE: If the power exhaust accessory is to be installed on the unit, the hood shipped with the unit will not be used and must be discarded.
Page 15: Step 11 - Make Electrical Connections
method is acceptable in your area.) If a de-energize via unit disconnect switch operation of the convenience outlet is de- sired, connect the source leads to the load side of the unit dis- connect. On a unit without a unit-mounted disconnect, connect the source leads to compressor contactor C and indoor fan con- tactor IFC pressure lugs with unit field power leads.
Page 16: All Units
Such operation would invalidate any applicable approximately in. (13 mm) under screw heads is Carrier warranty. exposed. Press the gasket over the screw heads. NOTE: Check all factory and field electrical connections for tight- Slip the backing plate over the screw heads at the keyhole ness.
Page 17 Remove two slot fillers in the bottom of the cover to per- mit service tool cords to exit the cover. Check for full closing and latching. GFCI RECEPTACLE NOT INCLUDED COVER - WHILE-IN-USE WEATHERPROOF GASKET BASEPLATE FOR GFCI RECEPTACLE UNIT CONNECT PRIMARY TRANSFORMER...
Page 18: Factory-Option Thru-Base Connections (Electrical Connections)
The 50HCQ unit requires an external temperature control de- vice. This device can be a thermostat (field-supplied) or a Pre- mierLink™ controller (available as factory-installed option or as field-installed accessory, for use on a Carrier Comfort Net- work ® or as a stand-alone control) or the RTU Open Controller...
Page 19: Heat Anticipator Settings
HEAT ANTICIPATOR SETTINGS Set heat anticipator settings at 0.14 amp for the first stage and Typical Central 0.14 amp for second-stage heating, when available. Thermostat Terminal Connections Board COMMERCIAL DEFROST CONTROL The Commercial Defrost Control Board (DFB) coordinates thermostat demands for supply fan control, 1 or 2 stage cool- ing, 2 stage heating, emergency heating and defrost control with unit operating sequences.
Page 20 Fig. 30 — Defrost Control Board Location Table 3 — 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...
Page 21: Electric Heaters
Auxiliary (Electric) Heat control The 50HCQ unit can be equipped with one or two auxiliary DISCONNECT MOUNTING LOCATION 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-...
Page 22 Single Point Boxes and Supplementary Fuses CONTROL When the unit MOCP device value exceeds 60-A, unit-mount- ed supplementary fuses are required for each heater circuit. BUSHING These fuses are included in accessory single point boxes, with power distribution and fuse blocks. The single point box will be installed directly under the unit control box, just to the left SINGLE POINT BOX...
Page 23: Control And Power Wiring Diagrams
Low Voltage Control Connections CONTROL AND POWER WIRING DIAGRAMS Run the low-voltage control leads from the heater module(s) Figures 37-44 are typical control and power wiring diagrams. — VIO and BRN (two of each if two modules are installed; identify for Module #1) — to the 4-pole terminal board TB4 located on the heater bulkhead to the left of Heater #1.
Page 24 Fig. 37 — Electro-Mechanical Control Wiring: 50HCQ*A07/D07 — 208/230v, 460v, 575v...
Page 25 Fig. 38 — Electro-Mechanical Control Wiring: 50HCQ*D07 Tier 2 (1) Compressor — 208/230v, 460v, 575v...
Page 26 Fig. 39 — Electro-Mechanical Control Wiring: 50HCQ*08/09 — 208/230v, 460v, 575v...
Page 27 Fig. 40 — Electro-Mechanical Power Wiring: 50HCQ*A07/D07 — 208/230v, 460v, 575v...
Page 28 Fig. 41 — Electro-Mechanical Power Wiring: 50HCQ*D07 Tier 2 (1) Compressor — 208/230v, 460v, 575v...
Page 29 Fig. 42 — Electro-Mechanical Power Wiring: 50HCQ*08/09 — 208/230v, 460v, 575v...
Page 30 Fig. 43 — PremierLink™ Wiring Schematic: 50HCQ07-09 — 208/230v, 460v, 575v...
Page 31 Fig. 44 — RTU Open System Control Wiring...
Page 32: Economi$Er (Factory Option)
ECONOMI$ER (FACTORY OPTION) Electrical ® • Rated Voltage — 20 to 30 Vac RMS, 50/60 Hz The EconoMi$er X system is an expandable economizer con- • Transformer — 100 va maximum system input trol system, which includes a W7220 economizer module (con- •...
Page 33 Economizer Module Wiring Details Table 6 — Economizer Module - Left Hand Terminal Blocks Use Fig. 46 and Tables 6 and 7 to locate the wiring terminals for the Economizer module. LABEL TYPE DESCRIPTION NOTE: The four terminal blocks are removable. Slide out each Top Left Terminal Block terminal block, wire it, and then slide it back into place.
Page 34 S-Bus Sensor Wiring Sensor Wiring The labels on the sensors and controller are color coded for When using a CO sensor the black and brown common wires ease of installation. Orange labeled sensors can only be wired are internally connected and only one is connected to “IAQ to orange terminals on the controller.
Page 35 To use the keypad when working with Setpoints, System and Advanced Settings, Checkout tests and Alarms: IMPORTANT: Table 10 illustrates the complete hierar- Navigate to the desired menu. chy. Your menu parameters may be different depending Press the (Enter) button to display the first item in the on your configuration.
Page 36 Table 10 — 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 37 Table 10 — Menu Structure* (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES † VALUE INCREMENT ACT COUNT 1 to 65535 Displays number of times actuator has cycled. 1 cycles equals 180 deg. of actuator movement in any direction. ACTUATOR OK/Alarm (on Alarm Displays ERROR if voltage or torque is below actuator range.
Page 38 Table 10 — Menu Structure* (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES † VALUE INCREMENT INSTALL 01/01/10 Display order = MM/DD/YY Setting order = DD, MM, then YY. UNITS DEG F or C Sets economizer controller in degrees Fahrenheit or Celsius EQUIPMENT CONV Conventional or HP...
Page 39 Table 10 — Menu Structure* (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES † VALUE INCREMENT MAT T CAL 0.0°F ±2.5 F SUPPLY AIR TEMPERATURE CALIBRATION Allows for the operator to adjust for an out of calibration temperature sensor. OAS T CAL 0.0°F ±2.5 F...
Page 40 Table 10 — Menu Structure* (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES † VALUE INCREMENT SHUTDOWN ACTIVE AUX2 IN is programmed for SHUTDOWN and 24 V has been applied to AUX2 IN terminal. DMP CAL RUNNING DAMPER CALIBRATION ROUTINE RUNNING If DCV Auto enable has been programmed, when the W7220 is completing a calibration on the dampers, this alarm will display.
Page 41 Table 12 — Dry Bulb Operation, No 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 MIN POS Closed High 24-v/On 0-v/Off MIN POS Closed High 24-v/On...
Page 42 Table 15 — 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 43 Table 18 — 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 44 ECONOMIZING DUAL ENTHALPY AVAILABLE HIGH LIMIT NOT AVAILABLE SINGLE ENTHALPY P2 (T,RH) (T,RH) TEMPERATURE Fig. 50 — Single Enthalpy Curve Boundaries Checkout NOTE: For information about menu navigation and use of the keypad see Interface Overview on page 34. Inspect all wiring connections at the economizer module’s ter- minals, and verify compliance with the installation wiring dia- To perform a Checkout test: grams.
Page 45: Smoke Detectors
Press the (Menu Up/Exit) button to complete the action Additional Application Data and return to the previous menu. Refer to the application data document “Factory Installed Smoke Detectors for Small and Medium Rooftop Units 2 to 25 NOTE: If the alarm still exists after clearing it, it is redisplayed Tons”...
Page 46 STEP 1 STEP 2 STEP 3 Fig. 52 — Completing Installation of Return Air Smoke Sensor Fig. 53 — EconoMi$er IV Wiring...
Page 47: Step 14 - Check Belt Tension
Step 14 — Check Belt Tension BLOWER PULLEY Measure the belt span length as shown in Fig. 54. Calculate the required deflection by multiplying the belt span length by V-BELT For example, if the belt span length is 32 inches: 32 x inch deflection.
Page 48 LPS/LOC Filter Drier Cooling Liquid Lines DFT 1 Acutrol Reversing Valve DFT 2 Comp 2 Reversing Valve Indoor Coil Comp 1 Outdoor Coil Accuater Heating Mode Liquid Lines (7.5 ton units only) Accuater Strainer (7.5 ton units only) Fig. 56 — Typical Unit Piping Schematic (50HCQ08, 09 Shown) Table 21 —...
Page 50 © Carrier Corporation 2019 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500211-01 Printed in U.S.A. Form 50HCQ-7-9-06SI Pg 50 1-19 Replaces: 50HCQ-7-9-05SI...
Page 51 START-UP CHECKLIST FOR 50HCQ07-09 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 preced- ing sections of this Installation Instruction document.
Page 52 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 2019 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

This manual is also suitable for:

50hcqd07 50hcqd08 50hcqd09

Carrier 50HCQA07 Installation Instructions Manual

Safety Considerations

Model Number Nomenclature

And Dimensions

Rated Indoor Airflow

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 - Units with Hinged Panels Only

Step 10 - Install External Condensate Trap

And Line

Step 11 - Make Electrical Connections

Step 12 - Adjust Factory-Installed Options

Step 13 - Install Accessories

Step 14 - Check Belt Tension

Pre-Start and Start-Up

Typical Unit Piping

Quick Links

SAFETY CONSIDERATIONS

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Summary of Contents for Carrier 50HCQA07

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Table of Contents