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McQuay MAC 080 C - User Manual

McQuay MAC 080 C
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MAC-C-2004
Air-Cooled Mini Chiller
Models: MAC 080 C/CR
MAC 100 C/CR
MAC 120 C/CR
MAC 150 C/CR
M4AC 080 C/CR
M4AC 100 C/CR
M4AC 120 C/CR
M4AC 150 C/CR

Table of Contents

Questions and Answers

  • D
    Dennis BradyAug 16, 2025
    What to do if the compressor does not start in McQuay MAC 080 C?
    • M
      Mr. Mark HarrisonAug 16, 2025
      If the compressor on your McQuay Chiller isn't starting, begin by checking the power supply to ensure it's properly connected. Also, inspect the fuses and circuit breakers; replace any blown fuses and reset breakers after fixing the underlying fault. Other potential issues include defective contactors or coils, which may need repair or replacement, tripped safety devices (determine the cause and correct it before restarting), or loose wiring (check and tighten all connections). If none of these steps resolve the issue, the compressor itself may be faulty, and you should contact a local dealer.
  • V
    Vincent CruzAug 19, 2025
    Why is my McQuay MAC 080 C not cooling enough?
    • A
      amy19Aug 20, 2025
      If your McQuay Chiller isn't cooling sufficiently, first ensure the thermostat is set correctly. If that's not the issue, there might be an obstacle blocking the unit's air inlet or outlet; remove any obstructions. For other potential causes like a dirty condenser coil, insufficient refrigerant, improper water flow rate, or contaminated water, it's best to contact a local dealer.
  • W
    Wyatt ScottAug 22, 2025
    How to fix a fan that does not work on McQuay MAC 080 C Chiller?
    • O
      Olivia MckinneyAug 22, 2025
      If the fan on your McQuay Chiller isn't working, start by checking the power supply to ensure it's properly connected. If the power supply is fine, the fan motor may be faulty, in which case you should contact a local dealer.
  • E
    ericduffyAug 26, 2025
    What to do if McQuay MAC 080 C shows reverse phase?
    • M
      murphywilliamAug 26, 2025
      If the McQuay Chiller displays a reverse phase error, switch off the unit immediately and check the 3-phase wiring to ensure it's correctly configured.
  • X
    xchanAug 28, 2025
    What to do if R phase is missing in McQuay MAC 080 C?
    • J
      Julie GregoryAug 28, 2025
      If the McQuay Chiller indicates a missing R phase, switch off the unit and inspect the 3-phase wiring to ensure everything is properly connected.
  • S
    Shane FisherAug 31, 2025
    What to do if S phase is missing in McQuay MAC 080 C?
    • K
      Kayla JohnsonAug 31, 2025
      If the McQuay Chiller indicates a missing S phase, switch off the unit and inspect the 3-phase wiring to ensure everything is properly connected.
  • J
    Jennifer JohnsSep 3, 2025
    What to do if T phase is missing in McQuay MAC 080 C Chiller?
    • S
      Stacey SmithSep 3, 2025
      If the McQuay Chiller indicates a missing T phase, switch off the unit and inspect the 3-phase wiring to ensure everything is properly connected.
  • E
    Edward HowardSep 6, 2025
    What to do if S & T phases are missing in McQuay MAC 080 C Chiller?
    • T
      Travis AndersonSep 6, 2025
      If the McQuay Chiller indicates missing S & T phases, switch off the unit and inspect the 3-phase wiring to ensure everything is properly connected.
  • J
    Jorge BradleySep 9, 2025
    Why McQuay MAC 080 C shows Overload+?
    • G
      Gary FernandezSep 9, 2025
      If the McQuay Chiller is showing an overload error, it may be due to a high discharge temperature. In this case, you should check the refrigerant system.
  • J
    johnsoncharlesSep 12, 2025
    What to do if McQuay MAC 080 C indicates sensor is missing?
    • R
      rebeccaortizSep 12, 2025
      If the McQuay Chiller indicates a sensor is missing, switch off the unit and plug in the sensor.

Summary

General Features and Specifications

Refrigerant Circuit

Describes the dual refrigerant circuits for part-loading capabilities and reliability.

Safety Protection

Lists safety features like pressure switches, overload protectors, and anti-freeze sensors.

Chiller Panel Controller

Safety Considerations

Emphasizes that only trained technicians should service the equipment.

Installation

Chiller Network and Bus Communication

Installation Safety Precautions

Critical safety warnings and precautions before installing the unit.

Installation Location & Transportation

Water Piping and System Setup

Software Description

Controller Functions and Status Options

Operation User Manual

Starting & Initial Chiller Control

Switching Chiller ON;OFF & Mode

Changing Mode Set Temperature

Advance Parameter Settings Overview

Accessing and configuring advanced parameters divided into 7 groups.

Compressor, Defrost & Antifreeze Parameters

Changing Controller Password

Alarm Record Management

Problems and Troubleshooting

Specifications

Cooling & Heat Pump Models Specifications

Technical data for cooling-only and heat pump models.

R407 C Cooling Models Specifications

Technical specifications for M4AC models using R407C refrigerant.

R407 C Heat Pump Models Specifications

Technical specifications for M4AC-CR models using R407C refrigerant.

Performance Table

Cooling Performance Data

Performance metrics (capacity, input) at various water/ambient temperatures for cooling models.

Heat Pump Cooling Mode Performance

Performance data for heat pump cooling mode with R22.

Heat Pump Heating Mode Performance

Performance data for heat pump heating mode with R22.

R407 C Cooling Performance Data

Performance metrics for R407C cooling models.

R407 C Heat Pump Cooling Performance

Performance data for R407C heat pump cooling mode.

R407 C Heat Pump Heating Performance

Performance data for R407C heat pump heating mode.

Wiring Diagrams

Electrical Wiring Diagram (Isolator Switch)

Wiring schematic showing electrical connections and isolator switch for models.

Electrical Wiring Diagram (Terminal Block)

Wiring schematic illustrating terminal block connections for models.

Wiring Diagram Notes & Settings

Wiring Diagram Symbols & Settings

Special Precautions for R407 C

R407 C Refrigerant Overview

Information on R407C composition, properties, lubricant, and comparison to R22.

R407 C Pre-Installation & Handling

Checklist for installation/servicing and guidelines for handling R407C systems.

R407 C System Vacuuming & Charging

Procedures for vacuuming and charging R407C, emphasizing liquid withdrawal and top-up avoidance.

Electrical and Wiring

Wiring Diagram Reference & Safety

Instruction to refer to diagrams, electrical safety precautions, and grounding.

Power Supply & Conductor Requirements

Safety and Caution

General Installation Warnings

Crucial safety warnings related to wiring, foreign objects, chemicals, operation, and water pipes.

Refrigerant & Water System Precautions

Servicing and Maintenance

Servicing Procedures & Safety Checks

Maintenance Recommendations

Troubleshooting

Compressor, Fan & Cooling Issues

McQuay MAC 080 C Specifications

General IconGeneral
BrandMcQuay
ModelMAC 080 C
CategoryChiller
LanguageEnglish

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