Specifications

16 Catalog WSC/WDC-4
MicroTech II Features and Benefits
FEATURE BENEFIT
Easy integration into a building management
system via McQuay’s exclusive Protocol
Selectability™ feature.
Designer can to select any BAS supplier using
industry standard protocols and know the
MicroTech II control will easily interface directly
with it.
Easy to read, adjustable, 12-inch, Super VGA
color touchscreen operator interface
Operators can observe chiller operation at a
glance, easily select various detail screens and
change setpoints
Historic trend data-can be downloaded from
a USB port
Water temperatures, refrigerant pressures, and
motor load plots can provide valuable unit
operation data
Precise ± 0.2 °F chilled water control
Provides stability in chilled water system
Proactive pre-shutdown correction of
“unusual conditions” allows chiller to stay
online
Activates alarm and modifies chiller operation
to provide maximum possible 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 and/or bypass valve
Optimum integrated control of cooling tower
water based on system conditions
Twenty-five previous alarm descriptions are
stored in memory
Invaluable asset in troubleshooting
Multiple language capability
Metric or in-lb units of measure
Great asset for world-wide applications
Designed with the System Operator in Mind
Reliable, economic use of any chiller depends largely on an easy operator interface. That’s why
operation simplicity was one of the main considerations in the development of the MicroTech II
controller. The operator interface with the chiller is a 12-inch, Super VGA color touch-screen.
The operator can clearly see the entire chiller graphically displayed, with key operating parameters
viewable on the screen. Other screens, such as alarm history and set points, are easily accessed
through touch screen buttons.
We have even gone as far as installing the unit operating and maintenance manual, as well as the
parts list, in the chiller’s microprocessor memory, so that they are viewable on the touchscreen or
can be downloaded to a computer through the onboard USB port.
Proactive Control
By constantly monitoring chiller status, the MicroTech II controller will automatically take
proactive measures to relieve abnormal conditions or shut the unit down if a fault occurs. For
example, if a problem occurs in the cooling tower and discharge pressure starts to rise, the
controller will automatically hold the load point and activate an alarm signal. A further rise in
pressure will initiate compressor unloading in an effort to maintain the setpoint pressure. If the
pressure continues to rise, the unit will shut off at the cutout pressure setting.