Mitsubishi HMA100V Technical Manual page 295

Underfloor heating and fan convectors- heating and cooling
20S 4-way valve
63H1 High pressure switch
CM Compressor motor
CT Current sensor
EEV-C Expansion valve, cooling
EEV-H Expansion valve, heating
FMo1 Fan motor
LPT Low pressure sensor
Tho-A Temperature sensor, outdoor air
Tho-D Temperature sensor, hot gas
Tho-R1 Temperature sensor, heat exchanger out
Tho-R2 Temperature sensor, heat exchanger in
Tho-S Temperature sensor, suction gas
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.
Extra shunt (EP21-QN11) lowers the temperature on system 2
according to settings in indoor unit.
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.
During cooling the valve QN12 switches to the cooling 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.
Underfloor heating and fan convectors- heating and cooling
BP4
BP5
BT1
BT2
BT3
BT6
BT12
BT15
BT19
BT24
BT30
CM1
CP1
CW
EB1
EP2
FD1
FL1
FL2
FQ1
GP1
GP10
HQ1
HS1
HW
MH-RG10
QM30
QM31
QN11
Heating mode
QM30 Closed
QM31 Open
QN11 Active during balance point (A)
QN12 Open (A)
Hot water mode
QM30 Open
QM31 Closed
QN11 Open (AB)
Cooling mode
QM30 Closed
QM31 Open
QN11 Open (AB)
QN12 Open (B)
Installation requirements
See page 9.
- 117 -
'10 • HM-T-149A
System description
EP21-BT2 Temperature sensor, supply 2
EP21-BT3 Temperature sensor, return 2
EP21-GP10 Circulation pump, system 2
EP21-QN11 Mixing valve, system 2
QN12 Shuttle valve for heating /cooling
High pressure sensor 0-4.15 MPa
Pressure gauge 0-4 Bar
Temperature sensor, outdoor air (external) (enclosed)
Temperature sensor, supply
Temperature sensor, heat exch. in (Twin)
Temperature sensor, tank water
Temperature sensor, heat exch. out (Twout)
Temperature sensor, liquid pipe (Thi-L)
Temperature sensor, immersion heater
Temperature sensor, external heat source φ11
Thermostat, standby mode 35-45℃ adjustable
Expansion vessel
Buffer vessel
Sanitary cold water inlet
Immersion heater 9kW (3-phase)
Heat exchanger
Temperature limiter 98℃
Safety valve, HW
Safety valve, tank 2.5 Bar
Mixing valve, HW
Circulation pump, climate system variable flow
Circulation pump, external 1
Strainer (water) 0.8mm2
Filter dryer (refrigerant) bi-flow 083
Sanitary hot water outlet
Room sensor MH-RG10 (accessory)
Reversing valve, hot water 2-way 35sec
Reversing valve, climate system 2-way 35sec
Mixing valve 3-way ball type 35sec
3-way ball type 35sec
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