IOMM ACZ1 ACZ 010A through 039A
3
Introduction
General Description
McQuay air-cooled condensing units are complete, self-contained automatic refrigerating units.
Every unit is completely assembled, factory wired, and tested. Each unit consists of air-cooled
condensers, Copeland Compliant Scroll hermetic compressor, and internal refrigerant piping, ready
to be piped to a field supplied low side.
The electrical control center includes all equipment protection and operating controls necessary for
automatic operation except for the staging control for the steps of capacity in the unit. Condenser fan
motors are three-phase (except single-phase on No. 1 fan with SpeedTrol option) and started by their
own contactors with inherent overload protection. The compressor has solid-state motor protection
for inherent thermal overload protection except Models ACZ 010 and 013 that have internal line
breakage.
Inspection
Check all items carefully against the bill of lading. Inspect all units for damage upon arrival. Report
shipping damage and file a claim with the carrier. Check the unit nameplate before unloading to be
sure it agrees with the power supply available. Units are shipped FOB factory and McQuay is not
responsible for physical damage after the unit leaves the factory.
Note:
Unit shipping and operating weights are listed on pages 15 and 16.
Installation
Note:
Installation is to be performed by qualified personnel who are familiar with local codes
and regulations, especially concerning refrigerant release to the atmosphere.
WARNING
Sharp edges and coil surfaces can cause personal injury. Wear protective gear and avoid
contact with them.
Handling
Be careful to avoid rough handling of the unit. Do not push or pull the unit from anything other than
the base. Block the pushing vehicle away from the unit to prevent damage to the sheet-metal cabinet
and end frame (see Figure 1).
To lift the unit, lifting slots are provided in the base of the unit. Arrange spreader bars and cables to
prevent damage to the condenser coils or cabinet (see Figure 2).
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