Midea RSJ-420/PZN1-H - Page 21

Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual MCAC-HTSM-201506
21
14
Address dial code
0~1 separately stands for address 0~1, means 0~1 set units. When
dial the dial switch to 2 or more, then it will invalid.
Each module of water heat pump has the electric control function. Set the host unit
through the address dial code on electric control board. Stipulate the unit with
address dial code 0# as the host unit. Only after setting the host unit , the function of
direct communication with wired controller and other function can be activated.
15
Left side: CHECK, spot check button, for checking the operating state of unit.
Right side: FORCE, constraint button, special function for constraint exit.
16
Digital screen.
17
3-phase, 4-wire system power input. Lack of phase or wrong phase only is detected
on the initial stage of power on without detection during operation.
18
High and low fan speed.
19
Tranformer input, 220V AC current.
20
Control port for compressor.
21
Refrigerant E-heater control port.
22
Electric ball valve on.
23
Electric ball valve off.
24
Control port for crankcase E-heating belt.
25
One-way solenoid control port.
26
4-way valve control power.
27
Left side: Circulating water pump control; right side: E-heater control. Only supply
ON/OFF signal, not supply power signal.
28
Right side: Remote alarm signal output. Only supply non-source ON/OFF signal, not
supply power signal.
29
EXV connector.