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Module Electrical and Control Panel
The electrical and control panel receives power from the
power distribution panel and provides power to the
individual electrical components in that module. Each
Figure 8. Module electrical and control panel
Electronic Control
The modular heat pump models use Carel c.pCO series
microprocessor controllers to monitor and report critical
operating parameters. See
controller is used to control and coordinate the functioning
of all secondary modules that make up the heat pump
system. Each secondary module has its own controller.
There are five BMS communication options:
Note: BMS is not included as standard, but available as an
option.
1. BACnet® MS/TP - Connection through built-in BMS2
port.
2. BACnet IP - BACnet router is used.
3. Modbus® RTU - Connection through built-in BMS2
port.
4. Modbus IP - Modbus router is used.
5. LonWorks® - LonWorks router is used.
Controllers
The distributed primary microprocessor control system
enables all secondary modules to operate independently in
the event that the primary microprocessor controller fails.
All heat pump safeties including temperature set point,
refrigerant pressures, and freeze protection are preserved.
ARTC-SVX009A-EN
Figure 10, p.
26. A primary
module has its own high voltage electrical panel and low
voltage control panel that distributes electricity to individual
components. It also has fuses and breakers and
microprocessor controller. See the following figure.
In a normal configuration, a secondary controller controls
the single module to which it is dedicated.
The secondary controller monitors key performance
parameters for its module and sends real-time information
to the primary controller. The primary controller monitors
the performance of the heat pump system, activating and
deactivating modules as needed to maintain the leaving
fluid temperature for the heat pump system.
See the following figure for a simplified example of a typical
microprocessor controller network.
Figure 9. Typical controller network
Operating Procedures
25
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