M thermal Mono
26 202004
Midea M thermal Mono Service Manual
user interface. Refer to the M thermal Mono Engineering Data Book Part 3, 7.4 “DHW MODE SETTING Menu”.
Domestic hot water demand priority can be ended by changing the switch on controller from "on" to "off".
Table 3-6.5: Component control during fast DHW operation
Control functions and states
Controlled according to load requirement
Controlled according to outdoor heat exchanger
pipe temperature
Electronic expansion valve
Position (steps) from 0 (fully closed) to 480 (fully
open), controlled according to discharge superheat
6.4 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.
Hydraulic adapter PCB (Optional)
With the help of hydraulic adapter PCB, totally 8 thermostats can be used at the same time for maximum 8 rooms to
control heat pump.
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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