OM Centrif Micro ΙΙ-5 3
Introduction
This manual provides operating, maintenance and troubleshooting information for McQuay
centrifugal chillers with MicroTech ΙΙ control and for the majority of starters used on McQuay
centrifugal chillers.
Software Version
Software Code: WCFU3UU04C/D/E
Notations stating previous content are made when a new version changes a previous value or
statement.
WARNING
Electric shock hazard. Can cause personal injury or equipment damage. This
equipment must be properly grounded. Connections to and service of the
MicroTech control panel must be performed only by personnel that are
knowledgeable
in the operation of the equipment being controlled.
CAUTION
Static sensitive components. A static discharge while handling electronic circuit
boards can damage components. Discharge any static electrical charge
by touching the bare metal inside the control panel before performing
any service work. Never unplug any cables, circuit board terminal blocks,
or power plugs while power is applied to the panel.
NOTICE
This equipment generates, uses and can radiate radio frequency energy and,
if not installed and used in accordance with this instruction manual,
may cause interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user
will be required to correct the interference at his own expense.
McQuay International Corporation disclaims any liability resulting
from any interference or for the correction thereof.
CAUTION
Do not install any non-McQuay authorized software or alter operating systems in
any unit microprocessor, including the interface panel. Failure to do so can cause
malfunction of the control system and possible equipment damage.
Temperature and Humidity Limits
The MicroTech ΙΙ controller is designed to operate within an ambient temperature range of 20°F to
130°F (-7°C to 54°C) with a maximum relative humidity of 95% (non-condensing).
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