McQuay MAC 065 C

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CMAC - C - 2004

Air-Cooled Mini Chiller

Models: MAC 030 C/CR

 MAC 035 C/CR

 MAC 040 C/CR

 MAC 050 C/CR

 MAC 065 C/CR

 MAC 070 C/CR



MAC 080 C/CR

MAC 100 C/CR

MAC 120 C/CR

MAC 150 C/CR

Table of Contents

Questions and Answers:

M
molly02Aug 6, 2025
What to do if McQuay MAC 065 C Chiller compressor does not start?
- J
  Jordan RoachAug 6, 2025
  If the McQuay Chiller compressor doesn't start, several factors could be at play. First, check the power supply to ensure it's active. Also, inspect the fuses and circuit breakers; replace any blown fuses and reset breakers after fixing the underlying fault. A tripped safety mechanism could also halt the unit; identify the type of safety shutdown, correct the issue, and then restart. Loose wiring is another potential cause; check wire connections and tighten any loose terminal screws. If none of these resolves the issue, the compressor itself may be faulty, and you should contact your local dealer.
S
shericruzAug 21, 2025
Why is my McQuay Chiller not cooling enough?
- A
  Alicia McneilAug 22, 2025
  If your McQuay Chiller isn't providing sufficient cooling, several factors could be responsible. Begin by checking the thermostat setting and reset it to a cooler temperature if it's set too high. Other potential causes, such as a dirty condenser coil, insufficient refrigerant, improper water flow rate, or contaminated water in the system, require contacting your local dealer. Also, make sure that there is no obstacle blocking air inlet or outlet of the unit, and remove it if there is any.

McQuay MAC 065 C Specifications

General

Model	MAC 065 C
Category	Chiller
Cooling Capacity	65 tons
Refrigerant Type	R-134a
Compressor Type	Screw
Voltage	460V
Sound Power Level	85 dBA

Summary

Features

Controller

Specifications

Cooling Only Unit (50 Hz)

Provides detailed technical specifications for the cooling-only models at 50Hz.

Heat Pump Unit (50 Hz)

Lists technical specifications for the heat pump models operating at 50Hz.

Performance Characteristic Charts

Using Performance Charts

Explains how to determine actual performance using correction factors and charts.

Heating Mode Performance

Heating Performance Data

Presents performance data for the unit in heating mode across various temperatures.

Outlines and Dimensions

Wiring Diagrams

MAC030035 C Wiring

Presents the electrical wiring diagram for MAC030 and MAC035C models.

MAC030035 CR Wiring

Shows the electrical wiring diagram for MAC030CR and MAC035CR models.

MAC040050 C Wiring

MAC040050 CR Wiring

MAC065 C070 C Wiring

MAC065070 CR Wiring

MAC080 C100 C Wiring

MAC080 CR100 CR Wiring

MAC120 C150 C Wiring

MAC120 CR150 CR Wiring

Installation

Installation Notice and Location

Provides guidelines for proper unit installation location and initial notices.

Obstacle Clearance for Installation

Mounting and Piping

Drainage and Power Connections

Electrical Power Connection

Servicing and Maintenance

Servicing Guidelines

Procedures and considerations for qualified personnel performing unit servicing.

Maintenance Recommendations

Advice on regular maintenance for consistent performance and durability.

Troubleshooting

Compressor Issues

Addresses common issues with compressor startup and operation.

Fan Operation Issues

Cooling Performance Issues

Offers troubleshooting steps for insufficient cooling or operational problems.

Microprocessor Troubleshooting

Error Codes and Solutions

Lists microprocessor error codes and corresponding solutions for diagnosis.

Refrigerant Circuit Diagrams

Parts List and Exploded View

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