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McQuay RDS 802C User Manual

McQuay RDS 802C
122 pages
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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 RDS 802C Specifications

General IconGeneral
BrandMcQuay
ModelRDS 802C
CategoryAir Handlers
LanguageEnglish

Summary

Introduction

Gas Burner Nameplate

Location and details on the gas burner nameplate for unit identification.

Hazard Identification Information

Information on dangers, warnings, and cautions related to unit operation and safety.

Typical Component Locations

General overview of the locations of major components within the unit.

Control Locations

Identifies the locations of various control components mounted throughout the unit.

Control Panel

Details on the unit control panels and their locations within the unit configuration.

Controls, Settings, and Functions

Lists unit control devices, their descriptions, reset, location, setting, and part numbers.

Mechanical Installation

Unit Clearances

Specifies required service clearances around the unit for access and maintenance.

Ventilation Clearance

Recommendations for minimum ventilation clearances around the unit.

Overhead Clearance

Restrictions for overhead obstructions above the unit and air handler section.

Roof Curb Assembly and Installation

Instructions for locating and assembling the roof curb for unit installation.

IBC Seismic Compliant Units

Instructions for installing IBC Seismic compliant McQuay Rooftop units.

Post and Rail Mounting

Guidance on mounting the unit on post and rail structural supports.

Rigging and Handling

Procedures and warnings for safely rigging and handling the unit.

Split Units

Information on units factory split at the supply fan bulkhead for shipping.

Field Refrigerant Piping and Charging of DX Coils

Guidance for field installation of refrigerant piping and charging DX coils.

Piping Recommendations

Recommendations for proper piping installation, including pressure drop.

Evacuation

Procedure for evacuating the refrigerant system to remove air and moisture.

Charging the System

Steps for charging the unit's refrigerant system after installation.

Condensate Drain Connection

Instructions for connecting the unit's condensate drain line for proper drainage.

Piping for Steam, Hot Water/Chilled Water Coils

Details on piping installation for steam, hot water, and chilled water coils.

Damper Assemblies

Description of optional damper assemblies, their operation, and linkage adjustment.

Installing Duct Static Pressure Sensor Taps

Recommendations for locating and installing duct static pressure sensing taps.

Installing Building Static Pressure Sensor Taps

Procedure for field installing static pressure taps for building pressurization control.

Electrical Installation

Field Power Wiring

Guidelines for field power wiring, including compliance with codes and standards.

Field Control Wiring

Instructions for field wiring low voltage control arrangements and connections.

Sequences of Operation

Power-up

Describes the unit's power-up sequence when primary power is connected.

Fan Operation

Details the sequence for supply and return fan operation and VFD control.

Economizer Operation

Explains the economizer operation based on outdoor air conditions and enthalpy.

MicroTech III Controller Operation

Using the Keypad/Display

Guide to navigating and using the MicroTech III controller keypad and display.

Passwords

Information on accessing controller functions using different password levels.

Navigation Mode

Explains how to navigate through menus and pages on the controller interface.

Edit Mode

Details on entering edit mode to change controller parameters and values.

Wiring Diagrams

Wiring Diagrams Legend

Provides a legend for understanding the symbols and IDs used in wiring diagrams.

Unit Options

Control Actuators

Details on how actuators are controlled by analog signals for damper and valve operation.

Enthalpy Control

Explanation of the enthalpy control device and its settings for economizer operation.

Ground Fault Protection

Description of the ground fault protection system designed to protect motors.

Smoke and Fire Protection

Information on optional smoke detectors and their role in building protection systems.

Freeze Protection

Details on the optional freezestat and its protective actions for heating coils.

Duct High Pressure Limit

Explanation of the duct high pressure limit control (DHL) and its function.

DesignFlow™ Outdoor Air Damper Option

Information on the DesignFlow airflow measurement station and its installation.

Propeller Exhaust Fan Option

Maintenance and operating instructions for the propeller exhaust fan option.

Ultraviolet Lights Option

Details on the ultraviolet lights option for coil and drain pan sanitation.

Check, Test, and Start Procedures

Servicing Control Panel Components

Safety precautions and steps for servicing control panel components.

Before Start-up

Pre-start checks to ensure proper installation and readiness for operation.

Fan Start-up

Procedure for starting up the supply and return fans and verifying rotation.

Economizer Start-up

Steps to start up the economizer, including checking outdoor air conditions.

Heating System Startup

Procedures for starting up the heating system (General, Gas, Electric, Steam, Hot Water).

Air Balancing

Guidelines for performing air balancing by a qualified technician.

Sheave Alignment

Instructions for ensuring proper alignment of driving and driven sheaves.

Mounting and Adjusting Motor Sheaves

Procedures for mounting and adjusting VM, VP, LVP, and MVP variable pitch sheaves.

Final Control Settings

Final Control Settings

Guide to setting final controls and programming the MicroTech III controller.

Maintaining Control Parameter Records

Recommendation to record and save MicroTech III setpoints and parameters.

Maintenance

Planned Maintenance

Preventive maintenance schedule and items to cover for optimal system performance.

Bearing Lubrication

Guidelines for lubricating motor bearings, including grease types and intervals.

Bearing Replacement

Detailed instructions for replacing bearings in bolt-on housings.

Winterizing Water Coils

Procedure for preventing freeze-up in water coils by draining and using antifreeze.

Manual Motor Protector (MMP)

Explanation of the manual motor protector's function and operation.

Circuit Breaker

Information on circuit breaker function, modes of operation, and resetting tripped breakers.

Phase Voltage Monitor (PVM)

Details on the phase voltage monitor's role in protecting three-phase loads.

Pressure Sensors

Information on static pressure transducers and troubleshooting procedures.

Replacement Parts List

Replacement Parts List

List of available replacement parts with McQuay part numbers for the unit.

Service and Warranty Procedure

In-Warranty Return Material Procedure

Procedure for returning material under warranty for service or replacement.

Limited Product Warranty (North America)

Exceptions

Specific conditions and exclusions that limit the product warranty coverage.

Rooftop Equipment Warranty Regist. Form

Initial Check

Checklist for initial inspection of the unit before start-up.

Fan Data

Section for recording supply and return fan operational data during start-up.

Performance Data

Section for recording compressor and system performance data.

Electric Heat Check, Test & Start

Checklist for verifying electric heat operation, terminals, and amp draw.

McQuay Training and Development

McQuay Training and Development

Information on training resources and contact details for McQuay HVAC products.

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