McQuay WDA series User Manual

Installation & Maintenance Data IM 447-9
Group: WSHP
Part Number: 107225603
Date: June 2006
Installation & Maintenance Data
Console Water Source Heat Pump
Models WDA, WDB, WDD, WDE, WDF, WDG, WDH, WDS, WLA, WLB, WLC, WLL
WMA, WMB, WMC, WMD, WME, WMF, WMG, WMH, WMU, WMK, WML
Model Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Checking for Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,4
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Cabinet Power Connections . . . . . . . . . . . . . . . . . . . . . . . 5
Water Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Cleaning & Flushing System . . . . . . . . . . . . . . . . . . . . . . . 7
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Unit Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Wiring Diagrams – Mark IV/AC-Units . . . . . . . . . . . . . . 9,10
Control Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Thermostats – Mark IV/AC-Units . . . . . . . . . . . . . . . . . . 12
Pump Restart Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
MicroTech Control Units . . . . . . . . . . . . . . . . . . . . . . . 14,15
Field Installed Options . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Optional Outside Air Damper . . . . . . . . . . . . . . . . . . . . . 18
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18,19
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Contents
©2006 McQuay International
®

McQuay WDA series Specifications

General

Brand	McQuay
Model	WDA series
Category	Heat Pump
Language	English

Summary

Model Nomenclature

McQuay WSHP Product Nomenclature

McQuay WSHP Product Identifiers

Checking for Damage

Installation

General Installation Guidelines

Covers general requirements, unit location, and installation steps.

Electrical Connections

Standard Electrical Connection

Cabinet Power Connection (Field Installed)

Water Connections

Piping and Valve Assemblies

Hose Kit and Condensate Connections

Piping

Cleaning and Flushing System

Operating Limits

Environment and Air/Water Limits

Electrical Data and Unit Operation

System Controls and Safeties

Typical Wiring Diagrams for Units with Mark IV/AC Controls

Thermostat Connection Diagrams

Unit Compatibility and Types

Remote Sensor Installation

MicroTech Network Control System

Troubleshooting

No Fan or Compressor Operation

Addresses issues where neither the fan nor the compressor runs.

Fan Operates, Compressor Does Not

Covers problems where the fan runs but the compressor does not.

Troubleshooting Issues

Compressor Start and Cycling Problems

Details issues related to compressor starting and short cycling.

Performance and Flow Issues

Addresses problems with cooling/heating performance and water flow.

Water Drip and Noise Issues

Covers water dripping from the unit and noisy operation causes.

Maintenance