Midea MIV V4+ Mini Service Manual page 48

MIV V4+ Mini DC Inverter R410A (220V, 8 kW)
1.2 Install indoor units
Procedure:
Confirm installation position
Note:
(1) The hook must strong enough to sustain the weight of indoor unit.
(2) Check the models of indoor units before installation.
(3) Pay attention to the main devices, such as the pipeline.
(4) Hold enough places for maintenance.
1.3 Refrigerant pipe
Procedure:
Install indoor units
Temporary pipeline
1.4 Drainage pipe
Procedure:
Install indoor units
Drainpipe heat-insulation and test-run
Note: It is no need to insulate the drainpipe if you choose the plastic pipe as drainpipe.
1.5 Electric wiring
(1) Please select power supply for indoor unit and outdoor unit separately. Both indoor units and outdoor units
should be grounded well.
(2) The power supply should have specified branch circuit with leakage protector and manual switch.
(3) Please put the connective wiring system between indoor unit and outdoor unit with refrigerant piping
system together.
(4) Power wiring should be done by professional electrician and complied with relevant National Electric
Standard.
(5) The power supply, leakage protector and manual of all the indoor units connecting to the same outdoor
unit should be universal. (Please set all the indoor unit power supply of one system into the same circuit.)
(6) It is suggested to use 3-core shielded wire as signal wire between indoor and outdoor units, multi-core wire
is unavailable. Pay attention to the consistency. When signal wire parallel to the power wire, please keep
enough distance (about 300mm at least) to prevent interference.
(7) The power wire and signal wire can't be enlaced together.
1.6 Lay the indoor pipeline
Note:
Collocate the air-outlet reasonably to prevent airflow short-circuit. Check the static pressure whether in the allowable range. The
air filters should be easy to unpick and wash. Do pressure test on pipeline.
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Label installation position
Install pipe Weld
Flush
Pressure test
Connect drainpipe
Install hooks
Add Nitrogen
Vacuum dry
Check water leakage
DM12-01.01.05en
Install indoor units
Installation