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Operating Procedures
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 9. Module electrical and control panel
Electronic Control
AMC chiller 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 the modules that make up the chiller unit. For units
consisting of more than a single chiller, each 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 chiller safeties including temperature set point,
refrigerant pressures, and freeze protection are preserved.
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 chiller, activating and deactivating
28
Figure 11, p.
28. A main
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.
modules as needed to maintain the leaving fluid
temperature for the chiller.
(See the following figure for a simplified example of a
typical microprocessor controller network.)
Figure 10. Typical controller network
Figure 11. Carel medium c.pCO primary controller
ARTC-SVX008A-EN
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