Trane Arctic PolyTherm TM Series, Installation, Operation And Maintenance Manual

Page: 51 / 84

ARTC-SVX005B-EN 51
Controls Interface
Chiller Controls
Each system is provided with a touchscreen interface
panel that is used to turn the chiller/heater on and off,
adjust set points, clear alarms, and perform detailed
set-up of the microprocessor controllers.
The primary module contains the primary
microprocessor controller. The primary
microprocessor communicates with the secondary
microprocessor in each module via a local network
communications protocol. The primary module also
includes a phase monitor to protect against low
voltage, phase imbalance, phase loss, and phase
reversal conditions.
Figure 28. PolyTherm chiller/heater primary module control panel
Each chiller/heater control system includes operational
switches for each compressor; high- and low-pressure
transmitters to indicate refrigeration pressures in each
circuit; high and low refrigeration pressure alarms
(including shutting shut down the responsible
compressors); anti-short cycling compressor timers;
minimum compressor run timers; and connection to
the BAS. See
Figure 28, p. 51 .
Power Distribution
There are two different electrical panels used in the
PolyTherm chiller/heater. The main power distribution
panel receives power from the building source and
distributes it to the individual modules. The module
electrical and control panel receives power from the
power distribution panel and provides power to
individual electrical components.
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Main Power Distribution
The power distribution panel distributes electricity
from the external building power supply. It also houses
breakers, phase monitor, and a touchscreen interface.