Panasonic WH-MHF09G3E5 Service Manual page 67

Air-to-water heatpump system. mono bloc unit
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Heat + Tank Mode (Heating Priority NOT SET) (Solar Priority SET condition)
When solar 3 way valve turn on during Tank interval, cancel
Tank interval immediately and switch 3-way valve to the
room side and start a heating/cooling interval.
T2
tank side
3 way valve
Heatpump
On
Off
T3
Booster
On
heater
Off
Solar request
On
Off
Solar 3 way
valve
On
Off
Heat + Tank Mode (Heating Priority NOT SET) (Solar Priority NOT SET condition)
3 way valve
Heatpump
On
Off
T3
Booster
On
heater
Off
Solar request
On
Off
Solar 3 way
On
valve
Off
T1
room side
Booster heater Off as solar
3 way valve On
T2
tank side
After heating/cooling interval, stand by to go in tank side after solar 3 way
valve request off, and fulfil tank thermo on (heat pump)
T1
T2
room side
T3
67
T2
T1
Booster heater On as
solar 3 way valve Off
T1
Heat pump
Thermo Off
Booster Heater
Thermo Off
Solar off
due to upper limit
T1 - Heating
T2 - Tank interval
T3 - Booster heater delay timer

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