Carrier GC Series - User Manual

GC Series
Geothermal Heat Pump
Sizes 024, 036, 048, 060, 072
Installation Instructions
NOTE: Read the entire instruction manual before starting the installation.
TABLE OF CONTENTS
PAGE NO.
SAFETY CONSIDERATIONS 2.....................
INTRODUCTION 2...............................
APPLICATION CONSIDERATIONS 3...............
Geothermal Systems 3...........................
Well Water Systems 4............................
INSTALLATION RECOMMENDATIONS 6...........
MOUNTING VERTICAL UNITS 6...................
MOUNTING HORIZONTAL UNITS 6................
CONDENSATE DRAIN 7...........................
DUCT SYSTEM 7.................................
Air Ducts 7....................................
PIPING 7........................................
PIPING & PLUMBING INSTALLATION 8............
Loop Pump Connections 8........................
Water Solenoid Valves 8.........................
Flow Regulator Valve 8..........................
Typical Open Loop Piping 9......................
Utility Curtailment 12...........................
Energy Tracking 12.............................
FACTORY INSTALLED OPTIONS 12................
Heat Recovery Package (HRP) 12..................
ELECTRICAL 14.................................
Electrical Connections 14.........................
Low-- Voltage Circuit Fusing and Reference 14........
Ground Connections 14..........................
ELECTRONIC THERMOSTAT INSTALLATION 15...
Communicating 15.............................
Non-- Communicating (Emergency Mode Only) 15.....
FIELD INSTALLED COMPONENTS 16..............
Electric Heaters 16..............................
Outdoor Air Temperature Sensor 16................
Outdoor Air Thermistor 17.......................
Electronic Air Cleaner Connections 17..............
Humidifier Connections 17.......................
System Shutdown Accessories 17..................
Generator 17..................................
Ventilation Accessory 17.........................
Compressor Start Accessories 17...................
TIMER SPEEDUP (TEST MODE) 18.................
PAGE NO.
PRE START-- UP CHECKLIST 18...................
USER INTERFACE QUICK S ET--UP 18..............
SYSTEM INITIAL POWER UP AND CHECKOUT 18..
SYSTEM VERIFICATION 19.......................
MAIN CONTROL BOARDS 19......................
UPM Board 19.................................
UPM Sequence of Operation 22....................
ECM Board 23.................................
ECM Sequence of Operation 23....................
OPERATING TEMP. AND PRESSURES TABLES 25...
AUXILIARY HEAT LOCKOUT 24..................
BLOWER AIRFLOW DELIVERY CHART 30.........
WATER SIDE PRESSURE DROP TABLE 30..........
BLOWER PERFORMANCE DATA TABLE 31........
INITIAL STAR--UP OF HRP SYSTEM 32.............
SYSTEM FUNCTION & SEQ. OF OPERATION 33.....
Communications and Status Function Lights 33.......
Time Delays 33................................
Compressor Operation 33........................
Troubleshooting units for proper switching between
low and high stages 33.........................
Unloader Test Procedure 33.....................
Two Stage Compressor 33......................
Compressor Internal Pressure Relief (IPR) 33........
Compressor Control Contactor 33.................
Troubleshoot Compressor 33....................
TROUBLESHOOTING 34..........................
UPM Fault Code Table 34........................
ECM BOARD TROUBLESHOOTING 36...........
LED Description & Fault Code Table 35...........
ECM Blower Start-- up & Troubleshooting 36........
Emergency Heating & Cooling Modes 36...........
ECM Board Start-- Up &
System Comm. Troubleshooting 36...............
ECM Board Status (Fault) Codes 36...............
ECM MOTOR TROUBLESHOOTING 36...........
SYSTEMS COMMUNICATION FAILURE 39.......
MODEL PLUG 39.............................
SERVICE TOOL 39............................
10K Temperature Sensor Resistance Table 40.........
CONFIGURATIONS 41............................
MAINTENANCE 45...............................

Carrier GC Series Specifications

General

Brand	Carrier
Model	GC Series
Category	Heat Pump
Language	English

Summary

Safety Considerations

Introduction

Application Considerations

Geothermal Systems

Details on closed loop and pond applications for geothermal systems.

Well Water Systems

Installation Recommendations

Mounting Vertical Units

Guidelines for leveling and vibration control for vertical units.

Mounting Horizontal Units

Instructions for suspending horizontal units and secondary drain pans.

Condensate Drain

Duct System

Piping

Piping and Plumbing Installation

Loop Pump Connections

Recommended flow centers and wiring kits for pumps.

Water Solenoid Valves

Details on using solenoid valves for open loop systems to prevent hammer.

Flow Regulator Valve

Using flow regulators to set flow rate based on EWT.

Typical Open Loop Piping

Water Solenoid Valve Wiring Diagrams for Open Loop Systems

Communicating Controls - Two Solenoid Valve

Utility Curtailment

Factory Installed Options

Heat Recovery Package (HRP) (optional)

Option for heating potable water using waste heat from the compressor.

Water Tank Preparation

Water Tank Refill

Electrical

Electrical Connections

Guidelines for connecting power supply and wiring.

Low-Voltage Circuit Fusing and Reference

Information on low-voltage circuit fusing and referencing.

Ground Connections

Requirements for proper grounding of the unit.

Electronic Thermostat Installation

Communicating

Installing communicating thermostats and system tips.

Non-Communicating (Emergency Mode Only)

Temporary emergency heat mode without UI.

Field Installed Components

Electric Heaters

Information on field-installable electric heater kits.

Other Field Installed Components

Covers OAT sensor, air cleaner, humidifier, shutdown, generator, ventilation.

Timer Speedup (Test Mode)

Pre Start-Up Checklist

System Initial Power Up and Checkout

Main Control Boards

UPM Board

Description of the Unitary Protection Module (UPM) board.

ECM Board

Description of the Electronically Commutated Module (ECM) board.

UPM Board Features

UPM DIP Switch Settings

Condensate Overflow Protection Sensor

Lockouts

Brownout Protection

UPM Sequence of Operation (SOO) Flow Chart

ECM Board

ECM Sequence of Operation

Auxiliary Heat Lockout

Emerging From Set-Back

Operating Temp. and Pressures Tables

Initial Start-Up of HRP System

HRP Troubleshooting

System Functions and Sequence of Operation

Communicating Sequence

How the UPM board controls all functions in communicating systems.

Compressor Operation

Explanation of the modulated scroll compressor operation.

Two Stage Compressor

Details on the two-stage compressor motor windings.

Troubleshooting

UPM Fault Code Table

Table listing UPM fault codes, causes, and actions.

ECM Fault Code Table

ECM Board Troubleshooting

ECM Blower Start-Up and Troubleshooting

Troubleshooting steps for ECM blower start-up.

Emergency Heating and Cooling Modes

Using common thermostats for emergency modes.

ECM Board Start-Up and System Communications Troubleshooting

Troubleshooting ECM board start-up and communication.

Status Code 46, Brownout Condition

Status Code 53, Outdoor Air Temperature Sensor Fault

ECM Motor Troubleshooting

Systems Communication Failure

Model Plug

Service Tool

10 K Temperature Sensor Resistance Table

Configurations

Horizontal Configuration

Details on converting horizontal unit discharge configurations.

Counter-Flow Configuration

Vertical Configuration (Top Discharge)

Condensate Drain Connection Re-Configuration

HRP Switch Relocation

Maintenance