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McQuay RAH 047C

McQuay RAH 047C
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Installation and Maintenance Manual IM 987
RoofPak
Applied Rooftop Systems
Air Handler
Group: Applied Air Systems
Part Number: IM 987
Date: May 2009
© 2009 McQuay International
RAH 047C - 077C, 12,000 to 50,000 cfm
RDS 800C - 802C, 4000 to 20,000 cfm
with MicroTech
®
III Unit Controller

Table of Contents

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McQuay RAH 047C Specifications

General IconGeneral
BrandMcQuay
ModelRAH 047C
CategoryAir Handlers
LanguageEnglish

Summary

Introduction

Controls, Settings, and Functions

Lists and describes unit control devices, settings, and functions.

Mechanical Installation

Roof Curb Assembly and Installation

Step-by-step instructions for installing the roof curb.

Field Refrigerant Piping and Charging of DX Coils

Instructions for field installation of DX coil refrigerant piping.

Piping Recommendations

Guidance for installing refrigerant piping for optimal performance.

Leak Testing

Procedures for testing refrigerant systems for leaks.

Evacuation

Steps for evacuating the refrigerant system.

Charging the System

Procedures for charging the unit's refrigerant system.

Piping for Steam, Hot WaterChilled Water Coils

Installation guidelines for various coil piping types.

Steam Coil Piping (All Units)

Specifics on piping steam heat coils.

Steam Trap Recommendations

Recommendations for selecting and installing steam traps.

Chilled Water Piping

Information and options for chilled water piping connections.

Installing Duct Static Pressure Sensor Taps

How to install duct static pressure sensing taps correctly.

Installing Building Static Pressure Sensor Taps

How to install building static pressure sensing taps.

Electrical Installation

Field Power Wiring

Guidelines and requirements for field power wiring.

Field Control Wiring

Guidelines and requirements for field control wiring.

Sequences of Operation

Unit Options

Duct High Pressure Limit

Function and adjustment of the duct high pressure limit control.

Check, Test, and Start Procedures

Before Start-up

Essential checks to perform before initial unit start-up.

Fan Start-up

Detailed steps for starting the supply and return fans.

Final Control Settings

Final Control Settings

Procedures for setting final controls and programming the controller.

Maintenance

Troubleshooting Pressure Transducers

Procedure for diagnosing and resolving pressure transducer issues.

Service and Warranty Procedure

Limited Product Warranty (North America)

Limited Product Warranty (North America)

Details the terms and conditions of the product warranty.

Rooftop Equipment Warranty Regist. Form

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