Product Manual PM WSC/WDC 19
Control Features
All McQuay Chillers Feature MicroTech Controls
McQuay has incorporated the latest microprocessor technology into the MicroTech control system to
give you the ultimate in centrifugal chiller control. The control includes many energy-saving features
not found in any other microprocessor system on the market today. MicroTech’s innovative design
will keep your chiller running efficiently. . . day in, day out, for years to come.
FEATURE BENEFIT
Easy integration into Building
Management System via OPEN
PROTOCOL.
Designer open to select any BMS supplier
and MicroTech will interface with it.
Remote PC monitoring available via direct
connection or modem
Provides central remote control and
monitoring of any MicroTech panel
Easy to read 4 line by 40 character
backlit display in plain English (metric)
Operators can observe operation at a
glance and easily select various menus
Precise ± 0.2 °F chilled water control Provides stability in chilled water system
Proactive pre-alarm correction of “off-
condition” upset-chiller stays online
Activates alarm and modifies chiller
operation to provide maximum cooling
Automatic control of chilled water and
condenser water pumps
Integrated lead/lag and automatic
engagement of backup pump
Controls up to four stages of tower fans
and modulation of tower fan or bypass
valve
Optimum integrated control of cooling tower
water based on system conditions
Internal 7-day,14-holiday clock with
programmable duration
Enables unattended starting and stopping
of entire chiller plant
Eight previous alarms and attendant
operating conditions in memory
Invaluable assist in trouble shooting
Designed with the system operator in mind
Reliable, economic use of centrifugal chillers depends on easy operator interface. That’s why
operation simplicity was one of the main considerations in the development of MicroTech. For
example, all the system’s status messages are shown in plain English on a 4-line by 40-character liquid
crystal display (LCD). The display is backlit for easy viewing in all light conditions. Metric units are
available at no extra cost.
In addition to the display, 18 individual, touch sensitive membrane key switches provide easy access to
data. MicroTech’s keypad is separated into four distinct functional areas; Category, Menu Item,
Action, and Quick Access.
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