Table of Contents
Related Manuals for McQuay RDT
Summarization of Contents
Introduction
Unit Nameplate
Details the location and information found on the unit's nameplate.
Compressor Nameplate
Describes the compressor nameplate and its identification details.
Gas Burner Nameplate
Details the gas burner nameplate and the information it contains.
Hazard Identification Information
Provides warnings about potentially hazardous situations in the manual.
Nomenclature
Explains the naming conventions used for unit components and configurations.
Unit Description
Typical Component Locations
Illustrates the locations of major components within RPS and RDT units.
Condenser Fan Arrangement
Refrigerant Circuit Schematic
Shows a schematic diagram of the unit's refrigerant circuit with component labels.
Mechanical Installation
Receiving Inspection
Procedures for inspecting the unit upon arrival to check for damage and verify specifications.
Unit Clearances
Specifies required clearances around the unit for service and proper operation.
Ventilation Clearance
Overhead clearance
Details restrictions on overhead obstructions to ensure proper airflow and condenser operation.
Roof Curb Assembly and Installation
RPS/RDT Assembly instructions
Provides steps for assembling the roof curb for RPS/RDT units.
RCS Assembly instructions
Provides steps for assembling the roof curb for RCS units.
Post and Rail Mounting
Rigging and Handling
Instructions and warnings for safely rigging and handling the unit.
RPS Factory Split at Condenser
Phase 1. Setting the Sections and Cabinet Reassembly
Steps to set and mechanically recouple the air handler and condenser sections.
Phase 2. Reconnecting Refrigerant Piping
Instructions for reconnecting refrigerant piping after unit sections are set together.
RPS/RDT Factory Split at Fan
Phase 1. Setting the Sections and Cabinet Reassembly
Steps for setting and recoupling the fan section and the rest of the unit.
Phase 2. Reconnecting Power and Control Wiring
Instructions for reconnecting power and control wiring after splitting the unit at the fan.
Piping Recommendations
Holding Charge
Procedures for checking and maintaining the unit's nitrogen holding charge.
Leak Testing
Detailed steps for leak testing the refrigerant circuit and necessary precautions.
Evacuation
Describes the procedure for evacuating the system to remove air and moisture.
Refrigeration Service Valves
Charging the System
Step-by-step guide for charging the refrigerant system.
Refrigerant Charge
Explains how to determine and apply the correct refrigerant charge for the unit.
Unit Piping
Gas Piping
Refers to installation manual for gas furnace piping.
Fuel Oil Piping
Refers to installation manual for oil furnace piping.
Hot Water Coil Piping
Details piping requirements for hot water coils, including corrosion and freeze risks.
Steam Coil Piping
Steam Piping Recommendations
Recommendations for proper steam piping installation to prevent damage and ensure performance.
Steam Trap Recommendations
Guidelines for sizing and installing steam traps for effective condensate removal.
Steam Coil Freeze Conditions
Recommendations to prevent steam coil freeze-up in low temperatures.
Damper Assemblies
Economizer Dampers
Details adjustment and operation of economizer dampers.
Electrical Installation
Field Power Wiring
Guidelines for field power wiring, including codes, safety, and wire sizing.
Preparing Unit for Operation
Relief Damper Tie-Down
Instructions for removing relief damper tie-down hardware for shipping.
Spring Isolated Fans
Steps to release spring mounts for supply and return fans shipped with isolators.
Adjustment of Spring Mounts
Procedure for adjusting spring mounts to ensure fans are level.
Sequences of Operation
Power-up
Describes the unit's power-up sequence and initial component energization.
Fan Operation
Details the sequence for supply and return fan operation, including timers and safeties.
Economizer Operation
Explains the economizer operation logic based on enthalpy and temperature.
Mechanical Cooling Operation
4-Compressor/4 Stage Unit
Describes the mechanical cooling operation for 4-compressor/4-stage units.
Heating
Gas Furnace, Modulating Burner (3 to 1 turn down)
Details the sequence of operation for the modulating gas furnace.
Unit Options
Enthalpy Control
Explains the function of the electromechanical enthalpy control for economizer operation.
Outside Air Enthalpy Control (OAE)
Details the OAE device and its role in controlling outside air intake based on enthalpy.
Differential Enthalpy Control (OAE/RAE)
Describes the optional differential enthalpy control using both OAE and RAE sensors.
Low Ambient Start
Explains the low ambient start option for compressors to ensure proper operation in cold conditions.
Freeze Protection
Fan On Operation
Explains the unit's response to a freezing condition when the fan is operating.
Fan Off Operation
Explains the unit's response to a freezing condition when the fan is off.
Variable Inlet Vanes
Minimum Vane Position
Recommends a minimum open position for inlet vanes to prevent pulsation and vibration.
Supply Fan Vane Adjustment
Provides instructions for adjusting supply fan inlet vane linkages for uniformity.
Return Fan Vane Adjustment
Details how to adjust return fan inlet vane linkages for proper rotation and tracking.
Actuator Rotation Adjustment
Explains how to adjust the actuator rotation for proper vane operation.
DesignFlow™™ Outdoor Air Damper Option
DesignFlow Airflow Measurement Station Startup:
Outlines the startup procedure for the DesignFlow airflow measurement station.
Propeller Exhaust Fan Option
Prestarting Checks
Pre-operation checks for fasteners, set screws, and fan rotation.
Propeller Exhaust Fan Control
Exhaust Fan On/Off Control
Details the logic for controlling exhaust fans based on building static pressure and damper positions.
Exhaust Fan Speed Control
Explains methods for controlling exhaust fan speed using VFDs to maintain building static pressure.
Check, Test, and Start Procedures
Before Start-up
Initial checks and verification steps before powering up the unit.
Power-up
Steps for closing the disconnect and powering up the unit's control system.
Fan Start-up
Procedures for starting the supply and return fans and checking for proper rotation and operation.
Heating System Start-up
General
General steps for initiating heating system start-up.
Gas Furnace
Refers to manual for gas furnace start-up procedures.
Electric Heat
Details the start-up sequence for electric heating stages.
Steam Heat
Explains steam valve operation during start-up and loss of power.
Hot Water Heat
Describes hot water valve operation during start-up and loss of power.
Sheave Alignment
Mounting:
Instructions for aligning driving and driven sheaves and ensuring shaft parallelism.
Drive Belt Adjustment
General Rules of Tensioning
General rules for proper belt tensioning to avoid slippage and premature wear.
Tension Measurement Procedure
Steps for measuring belt tension using deflection force.
Mounting and Adjusting Motor Sheaves
VM and VP Variable Pitch Sheaves
Instructions for mounting and adjusting VM and VP variable pitch sheaves.
Maintenance
Preventive Maintenance
Outlines routine preventive maintenance tasks to ensure system reliability and avoid issues.
Unit Storage
Provides precautions for storing the unit on-site to prevent damage and deterioration.
Preparation
Steps for preparing the unit for storage, including fans and cabinets.
Supply (and Return) fans
Instructions for preparing fans and motors for storage, including belt removal and shaft rotation.
Cabinet Sections
Guidance on inspecting cabinet sections for moisture or debris during storage.
Cooling circuits
Procedures for preparing cooling circuits for storage, including pumping down and fuse removal.
Control Compartment
Restart
Steps for performing a complete start-up after extended storage.
Bearing Lubrication
Motor Bearings
Details lubrication requirements for supply and return fan motors.
Fan Shaft Bearings
Explains periodic relubrication of fan shaft bearings based on operating duty and temperature.
Service and Warranty Procedure
Replacement Parts
Provides instructions for ordering replacement parts, including required information.
Compressor
Lists compressor types and considerations for ordering replacement compressors.
In-Warranty Return Material Procedure
Outlines the procedure for returning parts for warranty claims and issuing credits.
Limited Product Warranty (North America)
Exceptions
Lists exceptions and limitations to the product warranty coverage.
Assistance
Provides information on how to obtain assistance or warranty information.
Sole Remedy
States the owner's sole remedy and disclaims implied warranties.
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