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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.
Figure 29. PolyTherm chiller/heater master 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 29, p.
50.
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.
Figure 30. PolyTherm power distribution panel
50
The master module contains the master microprocessor
controller. The master microprocessor communicates
with the slave microprocessor in each module via a local
network communications protocol. The master module
also includes a phase monitor to protect against low
voltage, phase imbalance, phase loss, and phase reversal
conditions.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could result
in death or serious injury.
Disconnect all electric power, inlcuding remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot e
inadvertently energized. Verify that no power is present
with a voltmeter.
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
ARTC-SVX005A-EN
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