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McQuay SWT028C

McQuay SWT028C
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© 2002 McQuay International
Self-contained Air Conditioning System
Type SWT “C” Vintage Sizes 18 thru 40
Installation and Maintenance IM-709
Group: Applied Systems
Part Number: IM709
Date: January 2002
MEA
368-93-E

Table of Contents

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McQuay SWT028C Specifications

General IconGeneral
BrandMcQuay
ModelSWT028C
CategoryAir Conditioner
LanguageEnglish

Summary

Installation and Maintenance

Self-contained Air Conditioning System Overview

General overview of the packaged air conditioning system, its type, and vintage.

Installation Procedures

Recommended Service and Maintenance Clearances

Specifies required clearances around the unit for proper service access.

Field Sensor Mounting

Refrigerant Piping and Safety

Physical and Performance Data

Unit Dimensional Data

Field Wiring Requirements

Unit Disconnect Switch Installation

Requirements for installing a disconnect switch as per NEC guidelines.

Power Supply Wiring

Control Center Layout and Components

Typical Wiring Schematics

Power Schematic Diagram

Illustrates the unit's main power wiring connections and components.

Discharge Air Control (DAC) Schematic

Zone or Space Comfort Control (SCC) Schematic

Actuator Control Output Schematic

Auxiliary Fan Control Output Schematic

Compressor Control Output Schematic

Standard Unit Controls

Pressure and Safety Switches

Explains high/low pressure, frost protection, and clogged filter switches.

Compressor and Airflow Protection

Details compressor motor protection and proof of airflow switches.

Unit Options and Features

Duct Limit and Electrical Protection

Covers duct high limit and phase/voltage protection for motors.

Condenser Water Management Options

Water Side Economizer System

How the water side economizer provides cooling by utilizing tower water.

System Check, Test, and Start-Up

General Start-Up Overview

General procedures and requirements for unit start-up, including warranty registration.

Pre Start-Up Checklist

Essential checks to perform before operating the unit for the first time.

Unit Start-Up Procedure

Steps to follow for safely starting the unit after installation and initial checks.

Component Start-Up Procedures

Fan, Compressor, and Economizer Start-Up

Steps for starting and verifying the operation of the supply fan, compressors, and economizer.

Hot Water and Superheat Adjustment

Procedures for starting the hot water system and adjusting expansion valve superheat.

Refrigerant Charge Procedure

System Start-Up Adjustments

System Maintenance and Checks

Service and Warranty Procedures

McQuay Product Warranty Details

Information on the terms, limitations, and duration of the product warranty.

Warranty Registration and Initial Check Form

Initial System Checks Checklist

A checklist for performing initial inspections before unit operation.

Unit Start-Up Verification

Final Control and General Checks

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