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Controls Interface
Microprocessor Control System
AXM air-to-water modular heat pump models employ a
Carel c.pCO all-digital data control system to control and
report key system settings and indicators.
Primary Microprocessor Controller
Figure 19. c.pCO primary controller
Secondary Microprocessor Controller
In a normal configuration, a secondary controller controls
the single module to which it is dedicated. The distributed
primary microprocessor controller system enables the heat
pump to operate in the event the primary microprocessor
controller fails. The system automatically fails-over to
distributed primary control where each secondary controller
operates its own module but lacks the ability to
communicate with the BMS and rotate the lead
compressors every 168 system operating hours.
Touchscreen Interface Panel
The touchscreen interface panel is the primary means for
controlling and monitoring the system. See the following
figure.
Figure 20. Touch interface panel
ARTC-SVX006A-EN
Operator Control and Monitoring
Each system is provided with a touchscreen interface panel
that is used to turn the heat pump on and off, adjust set
points, clear alarms, and perform detailed set-up of the
microprocessor controllers.
Heat Pump Control
The operator uses three different types of controls and
indicators to monitor and maintain the desired operating
parameters in the heat pump - Power Distibution, Electrical
Controls, and Refrigeration Controls. These controls and
indicators are located in the power panels and the
microprocessor controllers.
Power Distribution
There are two different types of electrical panels used in
the heat pump . The main power distribution panel receives
power from the building source and distributes it to the
individual heat pump modules. The individual module
electrical and control panel receives power from the power
distribution panel and provides power to module's electrical
components.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
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 may include a door-mounted system
disconnect switch. See below figure.
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