D-EIMHP01702-23_00EN- 60/72
Fig. 60 – Details of probes positioning on the pipes
7.9.2 Unit modules M/S (MUSE) connection
The MUSE system uses the Modbus communication protocol to control and coordinate all the units. The system’s units use the port
T1 of the POL 468 for the Modbus communication.
In the following figure is showed how to connect the 4 PLCs on the same Modbus network.
Fig. 61 – Connection of 4 PLCs on the same Modbus network
Before starting
• Check that all hydraulic connections have been made correctly, that the information on the plates has been observed and
that there is a filter upstream the entire modular system.
• Make sure that the circulation pump/s is operating and that the water flowrate is sufficient to close the contact of the flow
switch, if installed.
• Check the water flow rate, measuring the pressure difference between inlet and outlet of the evaporator and calculate the
flow rate using the evaporator pressure drop graphs present in this manual.
• Each manifold module is equipped with shut-off valves. Open or close the shut-off valves to reach the proper exchanger
pressure drops, so the proper water flowrate.
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