Mitsubishi HMA100V Technical Manual page 291

HMS140V (MT300)-FDCW140VNX
Function
The heat pump prioritises hot water charging. The compressor
output is adjusted according to the outdoor temperature. The
circulation pump varies the flow to maintain a high charge
temperature.
When the water heater is full, the valves QM30 and QM31
switch to the heating system. The heat pump is then controlled
by a calculated set point value on the flow line. The compressor
varies the output according to the demand. The circulation
pump runs at a fixed set speed.
If the compressor does not manage the entire heat demand, the
electric heater is activated if it is allowed by setting and the
heat shunted out on the flow line.
Heating mode
QM30 Closed
QM31 Open
QN11 Active during balance point (A)
Hot water mode
QM30 Open
QM31 Closed
QN11 Open (AB)
Installation requirements
See page 9.
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System description
Principle of operation
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