Sequence of Operation
30MP Multi-chiller CARRIER CORPORATION ©2018
Installation and Start-up Guide All rights reserved
26
The 30MP Multi-chiller receives and sends information through 30MP chiller Linkage. It reads the following from
each machine, as applicable:
• Compressor sizes
• Entering water temperature
• Leaving water temperature
• Mode
• Freeze setpoint
• Hot gas bypass
• Type of chiller (air-cooled or water-cooled, brine or water)
The graphic is automatically updated to reflect the actual machine type and the proper setpoint range, if the
external analog input is used.
Linkage sends each chiller a control setpoint, enable command, and demand limit value. By transferring data
between the 30MP Multi-chiller and each chiller, the controller automatically configures each machine and then
sends and receives data. This operates the system properly and meets the desired chilled water setpoint by
commanding each individual 30MP chiller to run as necessary. The operating mode, hot gas valve status, and
entering and leaving water temperatures are displayed on the graphic, along with other information.
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