Midea SMK-60/CGN8, Руководство по обслуживанию

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M‐Thermal Split
24 201909
Midea M‐Thermal Split Ser
vice Manual
Table 3‐6.4: Component control during force cool operation
Component
Wiring diagram
label
4‐10kW
Control functions and states
Inverter compressor
COMP ●
Runs at force cooling operation rotation speed
DC fan motor FAN ●
Runs at force cooling operation speed
Electronic expansion valve EXV
●
304 (steps)
Four‐way valve 4‐WAY
●
Off
6.4 Fast DHW Operation
Fast DHW operation is used to quickly meet a requirement for domestic hot water when DHW priority has been set on the
user interface. Refer to the M‐Thermal Split Engineering Data Book Part 3, 8.4 “DHW MODE SETTING Menu”.
Table 3‐6.5: Component control during fast DHW operation
Component
Wiring diagram
label
4‐10kW
Control functions and states
Inverter compressor
COMP ●
Controlled according to load requirement
DC fan motor FAN
●
Controlled according to outdoor heat exchanger pipe
temperature
Electronic expansion valve EXV
●
Position (steps) from 0 (fully closed) to 480 (fully open),
controlled according to discharge superheat
Four‐way valve 4‐WAY
●
On
Tank electric heater TBH
●
On
6.5 Two zones control
1
Two zones control function is used to control temperature of each zone separately, thus different type radiator will operate
at its optimal temperature and water pump cycle time will be reduced to save energy.
In two zones control for cooling mode, when the setting temperature of a certain zones is reached, the zone and water
pump of this zone will turn off.
In two zones control for heating mode, the on/off control of zone and water pump is same with cooling mode, but in
addition, the mixing valve (3‐way valve SV3) control function will be activated to adjust the water temperature of the low
temperature zone by control the opening time and closing time of the valve. The mixing valve will only turn on when two
zones control for heating is activated. On other conditions, the mixing valve will keep off.
When the valve initially turns on, the opening time and closing time is same and then the time is controlled according to
the difference between water pipe temperature and setting water temperature of the controlling zone.
Note:
1.
M‐Thermal units just have the controlling function, while the mixing valve, water pump of each zone need to be field
supplied and connect to M‐Thermal unit.
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