Daikin DCH120 Series User Manual

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.
RSDX6412006r1
November 2016
DCC Cooling/DCH Heat Pumps
Commercial Package Units
with R-410A Refrigerant
4 - 6 Tons & Accessories
Service Instructions
Copyright © 2015 - 2016
Not for installation in the United States or Canada. This unit is for export only.

Daikin DCH120 Series Specifications

General

Series	DCH120
Type	Air to Water Heat Pump
Refrigerant	R-32
Energy Efficiency Ratio (Heating)	4.5
Operating Temperature Range (Cooling)	+10 to +46°C

Summary

Product Identification

Product Design

Unit Location

Guidelines for selecting the optimal and safe location for unit installation.

Electrical Wiring

Safety precautions and requirements for electrical connections and wiring.

System Operation

Startup, Adjustments, and Checks

Scheduled Maintenance

Servicing

Cooling Analysis Chart

Troubleshooting guide for common cooling system complaints and their causes.

S-11 Checking Loss of Charge Protector

Procedure to test the low-pressure safety switch for proper operation.

S-102 Evacuation

Detailed steps for properly evacuating the refrigeration system using vacuum pumps.

S-1 Checking Voltage

Procedure for measuring incoming line voltage and detecting imbalances.

S-15 Checking Capacitor

Methods for testing run and start capacitors for proper function.

S-103 Charging

Guidelines for accurately charging the system with the correct refrigerant amount.

S-2 Checking Wiring

S-17 Checking Compressor Windings

Tests for compressor winding continuity, ground faults, and resistance.

S-3 Checking Thermostat, Wiring, and Anticipator

Servicing

S-200 Checking External Static Pressure

S-205 Checking Belt Tension

S-206 Indoor Fan Rotation Check

Unit Wiring Diagrams