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Daikin DCG Series - User Manual

Daikin DCG Series
135 pages
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This manual is to be used by qualified, professionally trained HVAC
technicians only. Daikin does not assume any responsibility for property
damage or personal injury due to improper service procedures or
services performed by an unqualified person.
Copyright ©2013-2018
RSD6412007r50
July 2018
DCG Gas Electric/DCC Cooling/DCH Heat Pumps
Commercial Package Units
with R-410A Refrigerant
7.5 - 12.5 Tons & Accessories
Service Instructions

Table of Contents

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Summary

Service Instructions

Product Overview

Manual covers Daikin gas electric, cooling, and heat pump package units.

Important Information

Notices for Consumers and Servicers

Covers essential safety and usage guidelines for users and service technicians.

Safe Refrigerant Handling

Provides critical safety instructions for handling refrigerants to prevent injury or death.

Product Identification

Model Number Decoding

Explains how to interpret the model number for unit identification and parts.

Factory-Installed Options

Details various factory-installed options available for the units.

Product Design

Unit Location Requirements

Specifies essential requirements for unit placement to ensure safety and proper operation.

Unit Precautions

Lists critical precautions for handling and installing the unit.

Clearances

Defines necessary clearances around the unit for service, maintenance, and operation.

Electrical Wiring

Provides essential information and warnings regarding unit electrical connections.

High Voltage Safety

Highlights critical safety warnings related to high voltage components and wiring.

Main Power Supply Wiring

Details the requirements for connecting the main power supply to the unit.

Low Voltage Control Wiring

Explains the wiring requirements for thermostats and control systems.

System Operation

Safety Read Before Operating

Critical safety instructions that must be read and understood before operating the unit.

Operating Instructions

Step-by-step guide on how to operate the unit for heating and cooling.

Typical Package Cooling or Package Gas

Describes the operational flow for cooling mode in gas or electric units.

Heat Pump Operation

Details the operational modes and cycles of the heat pump system.

Gas Supply Piping

Provides guidelines for proper gas supply piping installation and safety.

Propane Gas Installations

Specific instructions and warnings for installing propane gas systems.

Roof Top Location and Installation

Installation guidelines specific to roof-mounted units.

Startup, Adjustments, and Checks

Crucial post-installation steps including initial setup and checks.

Air Flow Adjustments

Guidance on adjusting airflow for optimal unit performance.

Normal Sequence of Operation

Describes the standard operating sequence for heating and cooling cycles.

Defrost Control

Explains the defrost cycle operation for heat pump units.

Refrigeration System Checks

Procedures for checking the integrity and function of the refrigeration system.

Scheduled Maintenance

Maintenance Items

List of recommended periodic maintenance tasks for the unit.

Filters

Guidance on filter replacement frequency and importance.

Flame Sensor Maintenance

Procedure for cleaning and checking the flame sensor.

Servicing

Cooling Analysis Chart

Troubleshooting guide for cooling-related issues and their causes.

Gas Heating Analysis Chart

Troubleshooting guide for gas heating issues and their causes.

Checking Voltage (S-1)

Procedure for checking supply and operating voltages.

Voltage Imbalance Checks

Diagnosing and correcting voltage imbalance issues.

Checking Transformer and Control Circuit (S-4)

Diagnosing issues with the transformer and control circuit.

Checking High Pressure Control (S-12)

Diagnosing problems with the high-pressure safety control.

Checking Capacitor (S-15)

Procedures for testing run and start capacitors.

Checking Compressor Windings (S-17)

Procedures for testing compressor windings for continuity and ground.

Checking Reversing Valve and Solenoid (S-21)

Diagnosing issues with the reversing valve and its solenoid.

Troubleshooting

General troubleshooting guide for unit operational issues.

Leak Testing (S-101)

Procedures for safely testing the refrigeration system for leaks.

Evacuation (S-102)

Steps for properly evacuating the refrigeration system.

Checking Superheat (S-108)

Procedure for measuring and verifying superheat levels.

Checking Subcooling (S-109)

Procedure for measuring and verifying subcooling levels.

Overcharge of Refrigerant (S-113)

Diagnosing and correcting refrigerant overcharge issues.

Checking External Static Pressure (S-200)

Measuring and evaluating external static pressure in ductwork.

Testing Primary Limit Control (S-300)

Testing the function of the primary limit control switch.

Checking Flame Rollout Switch (S-302)

Testing the flame rollout safety switch for proper operation.

Testing Gas Valve (S-304)

Steps for testing the gas valve for proper function.

Checking Gas Pressure (S-307)

Measuring and adjusting inlet and manifold gas pressures.

Testing Ignition Control Module (S-313)

Procedures for testing the ignition control module.

Checking Flame Sensor (S-314)

Procedure for testing the flame sensor's signal output.

Accessories

Daikin Commercial Package Unit Accessories

List of available accessory kits for Daikin units.

Accessories Wiring Diagrams

Economizer Wiring Diagram

Wiring schematic for the economizer accessory.

Powered Convenience Outlet Wiring

Wiring diagram for the powered convenience outlet accessory.

Power Exhaust Wiring Diagram (DPE90150)

Wiring diagram for the DPE90150 power exhaust accessory.

Package System Wiring Diagram - 1 Stage Electric Heat

Wiring diagram for single-stage electric heat configurations.

Package System Wiring Diagram - 2 Stage Electric Heat

Wiring diagram for two-stage electric heat configurations.

Package System Wiring Diagram - Heat Pumps Only! Two-Stage Electric Heat

Wiring for heat pumps with two-stage electric heat.

Low Ambient for DCC;DCG 7.5 - 12.5 Ton

Wiring diagram for low ambient kits on specific DCC/DCG models.

Heater Kits

Heater Kits Part Numbers

List of available part numbers for various heater kits.

Minimum Airflow for Electric Heat

Specifies minimum airflow requirements for electric heater kits.

EHK*-16 (Serials Before 1409)

Wiring diagram for EHK*-16 heater kits, pre-serial 1409.

EHK[3, 4, 7]-30 (Serials Before 1409)

Wiring diagram for EHK[3, 4, 7]-30 heater kits, pre-serial 1409.

EHK*-16 (Serials 1409 and Newer)

Wiring diagram for EHK*-16 heater kits, serial 1409 and newer.

Unit Wiring Diagrams

DCC090-150 XXX*B***A* Wiring

Wiring diagram for specific DCC models (090-150XXX*B***A*).

DCC(090,102)XXX*V***A* Wiring

Wiring diagram for specific DCC models (090,102)XXX*V***A*.

DCG(120,150)XXX*V***A* Wiring

Wiring diagram for specific DCG models (120,150)XXX*V***A*.

7.5-12.5 Ton Packaged Heat Pump Unit WIRING DIAGRAMS

Wiring diagrams for DCH Commercial Heat Pump units.

DCH090-150 XXX*B***A* Wiring

Wiring diagram for specific DCH models (090-150XXX*B***A*).

DCG090-150 XXX[4,7]B***A* Wiring

Wiring diagram for specific DCG models (090-150XXX[4,7]B***A*).

DCG(090,102)XXX3 V***A* Wiring

Wiring diagram for specific DCG models (090,102)XXX3V***A*.

DCG(090,102)XXX[4,7]V***A* Wiring

Wiring diagram for specific DCG models (090,102)XXX[4,7]V***A*.

DCG(120,150)XXX3 V***A* Wiring

Wiring diagram for specific DCG models (120,150)XXX3V***A*.

DCG(120,150)XXX[4,7]V***A* Wiring

Wiring diagram for specific DCG models (120,150)XXX[4,7]V***A*.

Summary

Service Instructions

Product Overview

Manual covers Daikin gas electric, cooling, and heat pump package units.

Important Information

Notices for Consumers and Servicers

Covers essential safety and usage guidelines for users and service technicians.

Safe Refrigerant Handling

Provides critical safety instructions for handling refrigerants to prevent injury or death.

Product Identification

Model Number Decoding

Explains how to interpret the model number for unit identification and parts.

Factory-Installed Options

Details various factory-installed options available for the units.

Product Design

Unit Location Requirements

Specifies essential requirements for unit placement to ensure safety and proper operation.

Unit Precautions

Lists critical precautions for handling and installing the unit.

Clearances

Defines necessary clearances around the unit for service, maintenance, and operation.

Electrical Wiring

Provides essential information and warnings regarding unit electrical connections.

High Voltage Safety

Highlights critical safety warnings related to high voltage components and wiring.

Main Power Supply Wiring

Details the requirements for connecting the main power supply to the unit.

Low Voltage Control Wiring

Explains the wiring requirements for thermostats and control systems.

System Operation

Safety Read Before Operating

Critical safety instructions that must be read and understood before operating the unit.

Operating Instructions

Step-by-step guide on how to operate the unit for heating and cooling.

Typical Package Cooling or Package Gas

Describes the operational flow for cooling mode in gas or electric units.

Heat Pump Operation

Details the operational modes and cycles of the heat pump system.

Gas Supply Piping

Provides guidelines for proper gas supply piping installation and safety.

Propane Gas Installations

Specific instructions and warnings for installing propane gas systems.

Roof Top Location and Installation

Installation guidelines specific to roof-mounted units.

Startup, Adjustments, and Checks

Crucial post-installation steps including initial setup and checks.

Air Flow Adjustments

Guidance on adjusting airflow for optimal unit performance.

Normal Sequence of Operation

Describes the standard operating sequence for heating and cooling cycles.

Defrost Control

Explains the defrost cycle operation for heat pump units.

Refrigeration System Checks

Procedures for checking the integrity and function of the refrigeration system.

Scheduled Maintenance

Maintenance Items

List of recommended periodic maintenance tasks for the unit.

Filters

Guidance on filter replacement frequency and importance.

Flame Sensor Maintenance

Procedure for cleaning and checking the flame sensor.

Servicing

Cooling Analysis Chart

Troubleshooting guide for cooling-related issues and their causes.

Gas Heating Analysis Chart

Troubleshooting guide for gas heating issues and their causes.

Checking Voltage (S-1)

Procedure for checking supply and operating voltages.

Voltage Imbalance Checks

Diagnosing and correcting voltage imbalance issues.

Checking Transformer and Control Circuit (S-4)

Diagnosing issues with the transformer and control circuit.

Checking High Pressure Control (S-12)

Diagnosing problems with the high-pressure safety control.

Checking Capacitor (S-15)

Procedures for testing run and start capacitors.

Checking Compressor Windings (S-17)

Procedures for testing compressor windings for continuity and ground.

Checking Reversing Valve and Solenoid (S-21)

Diagnosing issues with the reversing valve and its solenoid.

Troubleshooting

General troubleshooting guide for unit operational issues.

Leak Testing (S-101)

Procedures for safely testing the refrigeration system for leaks.

Evacuation (S-102)

Steps for properly evacuating the refrigeration system.

Checking Superheat (S-108)

Procedure for measuring and verifying superheat levels.

Checking Subcooling (S-109)

Procedure for measuring and verifying subcooling levels.

Overcharge of Refrigerant (S-113)

Diagnosing and correcting refrigerant overcharge issues.

Checking External Static Pressure (S-200)

Measuring and evaluating external static pressure in ductwork.

Testing Primary Limit Control (S-300)

Testing the function of the primary limit control switch.

Checking Flame Rollout Switch (S-302)

Testing the flame rollout safety switch for proper operation.

Testing Gas Valve (S-304)

Steps for testing the gas valve for proper function.

Checking Gas Pressure (S-307)

Measuring and adjusting inlet and manifold gas pressures.

Testing Ignition Control Module (S-313)

Procedures for testing the ignition control module.

Checking Flame Sensor (S-314)

Procedure for testing the flame sensor's signal output.

Accessories

Daikin Commercial Package Unit Accessories

List of available accessory kits for Daikin units.

Accessories Wiring Diagrams

Economizer Wiring Diagram

Wiring schematic for the economizer accessory.

Powered Convenience Outlet Wiring

Wiring diagram for the powered convenience outlet accessory.

Power Exhaust Wiring Diagram (DPE90150)

Wiring diagram for the DPE90150 power exhaust accessory.

Package System Wiring Diagram - 1 Stage Electric Heat

Wiring diagram for single-stage electric heat configurations.

Package System Wiring Diagram - 2 Stage Electric Heat

Wiring diagram for two-stage electric heat configurations.

Package System Wiring Diagram - Heat Pumps Only! Two-Stage Electric Heat

Wiring for heat pumps with two-stage electric heat.

Low Ambient for DCC;DCG 7.5 - 12.5 Ton

Wiring diagram for low ambient kits on specific DCC/DCG models.

Heater Kits

Heater Kits Part Numbers

List of available part numbers for various heater kits.

Minimum Airflow for Electric Heat

Specifies minimum airflow requirements for electric heater kits.

EHK*-16 (Serials Before 1409)

Wiring diagram for EHK*-16 heater kits, pre-serial 1409.

EHK[3, 4, 7]-30 (Serials Before 1409)

Wiring diagram for EHK[3, 4, 7]-30 heater kits, pre-serial 1409.

EHK*-16 (Serials 1409 and Newer)

Wiring diagram for EHK*-16 heater kits, serial 1409 and newer.

Unit Wiring Diagrams

DCC090-150 XXX*B***A* Wiring

Wiring diagram for specific DCC models (090-150XXX*B***A*).

DCC(090,102)XXX*V***A* Wiring

Wiring diagram for specific DCC models (090,102)XXX*V***A*.

DCG(120,150)XXX*V***A* Wiring

Wiring diagram for specific DCG models (120,150)XXX*V***A*.

7.5-12.5 Ton Packaged Heat Pump Unit WIRING DIAGRAMS

Wiring diagrams for DCH Commercial Heat Pump units.

DCH090-150 XXX*B***A* Wiring

Wiring diagram for specific DCH models (090-150XXX*B***A*).

DCG090-150 XXX[4,7]B***A* Wiring

Wiring diagram for specific DCG models (090-150XXX[4,7]B***A*).

DCG(090,102)XXX3 V***A* Wiring

Wiring diagram for specific DCG models (090,102)XXX3V***A*.

DCG(090,102)XXX[4,7]V***A* Wiring

Wiring diagram for specific DCG models (090,102)XXX[4,7]V***A*.

DCG(120,150)XXX3 V***A* Wiring

Wiring diagram for specific DCG models (120,150)XXX3V***A*.

DCG(120,150)XXX[4,7]V***A* Wiring

Wiring diagram for specific DCG models (120,150)XXX[4,7]V***A*.

Daikin DCG Series Specifications

General IconGeneral
RefrigerantR32
Energy Efficiency Ratio (EER)Varies depending on model. Refer to specific model's datasheet.
Coefficient of Performance (COP)Varies depending on model. Refer to specific model's datasheet.
Noise Level (Outdoor Unit)45 dB - 58 dB
Power Supply220-240 V, 50 Hz
Indoor Unit Dimensions (HxWxD)Varies depending on model. Refer to specific model's datasheet.
Outdoor Unit Dimensions (HxWxD)Varies depending on model. Refer to specific model's datasheet.
Indoor Unit WeightVaries depending on model. Refer to specific model's datasheet.
Outdoor Unit WeightVaries depending on model. Refer to specific model's datasheet.

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