Operating instructions

IMM AGSB-60 53
Multi-Point w/Disconnect Switch
Separate power supply to each circuit's power panel which is equipped with a disconnect
switch with a through-the-door handle. Each disconnect switch can isolate its circuit for
service purposes.
Single-Point w/ Disconnect Switch
Single power supply to a factory-mounted disconnect switch. Includes factory wiring to a
circuit breaker located in each circuit's power panel.
High- Short Circuit Current Protection
The control panels and single point connection box (if ordered) will have the high short circuit
current rating as shown below. A high interrupt circuit breaker is included.
115 Volt Convenience Outlet
A 10.0 amp, 115-volt convenience outlet mounted inside the control panel is available as an
option on all units. The outlet is located in the #2 circuit control box.
Lightning Arrestor per Compressor
Unit
Protective Base Guards
Optional factory installed wire mesh lower base guards provide protection for ground level
installations. Coil guards are standard.
Wind Baffles/Hail Guard
The presence of wind will have an adverse affect on any air-cooled chiller. Wind across a
condenser coil will not allow a chiller to operate as efficiently, or possibly not even start, at
low ambient temperatures. Wind in effect raises the minimum ambient temperature in which
the chiller can operate. The AGS air-cooled chillers are available with field installed wind
baffles which allow the chiller to operate effectively down to the ambient temperature for
which it was designed.
Hail can have a damaging effect on the performance of an air-cooled condenser. As the finned
area is flattened against the coil, restricting airflow, the efficiency of the coil is reduced.
If desired, the wind/hail guards can be purchased for only one side of a unit in cases where an
adjacent wall provides protection.
Louvers
Stamped metal louvers for the coil section (upper part of unit) or combined with lower louvers
to cover the full height of the side of the unit, for field installation. They provide protection
from hail and vandalism and add a decorative appearance to the unit.
Vibration Isolators
Spring vibration isolators are available for field installation under the unit base frame on sound
sensitive applications. Consult the local McQuay sales office for seismic isolation.
Evaporator Insulation
Double evaporator thermal insulation is available and recommended for low fluid temperature
applications.
Suction Butterfly Valve
An optional factory-mounted suction butterfly shutoff valve is available to assist in isolating
the compressor for service.