York 21RT-47RT Installation, Operation And Maintenance Manual page 26

3.2.3 Module's water flow switch and water valve's wiring (all modules)

Water side's shut-off valve for module's evaporator and condenser
Caution: It must correspond to the module, for example, the water valve on the 2# module water pipe must
be connected to the 2# module machine.

Water flow switch for module's evaporator and condenser
Caution: It must correspond to the module, for example, the water flow switch on 2# module's water pipe
must be connected to the 2# module machine.
3.2.4 Module DIP setting
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Electrical connection
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