Mixing Valve Control; Flow Sensor; Heat Source Setting; Pump Speed - Mitsubishi Electric EHST20C-VM2C.UK Service Manual

Mixing valve control

1. From the Auxiliary settings menu highlight Mixing valve control.
2. Press CONFIRM.
3. The Mixing valve control screen is displayed.
4. Use F1 and F2 buttons to set Running time between 10 to 240 seconds. The
Running time equals to a period from full open of the valve (at a hot water
mixing ratio of 100%) to full close (at a cold water mixing ratio of 100%).
Note: Set the Running time according to the specifications of the actuator
of each mixing valve.
1. From the Auxiliary settings menu highlight Mixing valve control.
2. Press CONFIRM.
3. The Mixing valve control screen is displayed.
4. Press F3 and F4 buttons to set the interval between 2-zone temperature
controls of the mixing valve between 1 to 30 minutes.
Note: It is recommended to set the interval to 2 minutes that is a default
value. With the interval set longer, it could take longer to warm up a
room.

Flow sensor

1. From the Auxiliary settings menu highlight Flow sensor.
2. Press CONFIRM.
3. Press F3 or F4 buttons to select a refrigerant address of which you wish to
configure or check the settings, and press CONFIRM. *1.
4. The Flow sensor screen is displayed.
5. Use F1 and F2 buttons to set the minimum flow rate of flow sensor between 0
to maximum L/min.
6. Use F1 and F2 buttons to set the maximum flow rate of flow sensor between
minimum to 100L/min.
*1 For multiple outdoor units control system only.
Note: Do not change the setting since it is set according to the
specification of Flow sensor attached to the cylinder unit.
<Heat source setting>
The default heat source setting is heat pump and all electric heaters present in
the system to be operational. This is referred to as Standard operation on the
menu.
<Pump speed>
1. From the Service menu highlight water pump speed.
2. Press CONFIRM.
3. Press F3 and F4 buttons to select a refrigerant address of which you wish to
configure or check the settings, and press CONFIRM. *1
4. The Pump speed screen is displayed.
5. Use F2 and F3 buttons to set the pump speed of the water circulation pump
between 1 and 5.
*1 For multiple outdoor units control system only.
OCH570
31
Mixing valve setting screen
Flow sensor setting screen
Heat source setting screen
Pump speed setting screen