Specifications

The MicroTech II controller's memory retains a
record of faults and the time/date stamp. The
controller's memory (no batteries required) can
retain and display the cause of the current fault and
the last twenty-five fault conditions. This method
for retaining the fault is extremely useful for
trouble shooting and maintaining an accurate
record of unit performance and history. The
controller features a two-level password security
system to provide protection against unauthorized
use.
The Home Screen shown in
Figure 5 is usually
used as the primary viewing screen. It provides
real time data on unit status, water temperatures,
chilled water set point and motor amp draw. In
other words, it very clearly answers the vital
question; is the chiller doing what it is supposed to
do?
Figure 6, MicroTech II Setpoints Screen
Trend Logging
Ever wonder how your chiller performed last
week? Were you holding the required chilled
water temperature? What kind of cooling load did
the chiller have?
The McQuay MicroTech II controller can record
and plot water temperatures, refrigerant pressures,
and motor load in order to trend performance.
These values can also be downloaded through a
convenient USB port in the control panel, and
exported into a spreadsheet for further evaluation
and record purposes.
Figure 5, MicroTech II Home Screen
If an alarm occurs, a red button appears on the
screen (a remote signal is also available). Pressing
this button immediately accesses the Active Fault
Screen that gives complete fault information. The
problem can be fixed and the fault can be quickly
and easily cleared at this point.
Changing Setpoints
The mystery of changing set points is a thing of
the past. Look at how easy the job becomes with
the McQuay MicroTech II. For example, to
change the chilled water set point, press SET from
any screen, then press the WATER button and this
screen appears, press button #1, Leaving Water
Temperature, and you are ready to input a new
value.
Figure 7, Trend Logging Screen
Catalog WMC-4 11