Midea MGB Series

Air-cooled modular chiller unit 50Hz MCAC-ATSM-2011-12
132
Fielding wiring
Water pump wiring diagram reference, the control circuit of water pump AC contactor must be passed P1
and P2 contacts of master unit.
One water pump
Creepage
Switch
Water
pump
Contactor
Over charge
relay
380V 3P 50HZ
Contactor
winding
Over charge
relay
0# Main unit PCB
A B C N
380V 3P 50HZ
P1 P2
XT4
Two water pump (one is reserved):
Creepage
Switch
Water
pump
Contactor
Over charge
relay
Creepage
Switch
Water
pump
Contactor
Over charge
relay
380V 3N 50Hz
A B C N
380V 3N 50Hz
Contactor
winding 1
Over charge
relay
Switch 1 Switch 2
Contactor
winding 2
Over charge
relay
P1 P2
0# main unit PCB
XT4