Panasonic WH-SHF09D3E5, Service Manual

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41
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Booster heater control
- Booster heater turn On and Off follow normal operation.
- Booster heater turn ON condition:
1 During startup time (initialization), Booster heater turn ON after DELAY TIMER.
2 When tank temperature lower than HEATER ON TEMP
3 20 minutes from previous heater off.
- Booster heater turn OFF condition:
1 When tank temperature higher than tank set temperature for continuous 15 secs.
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Solar 3 way valve
- Solar pump operates follow solar operation specification.
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2 way valve closes
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Others
- Indoor backup heater cannot be ON during tank mode only.
12.1.4 Heat + Tank Mode Operation
Setting 1: When Heating priority is set by control panel:
1 3 ways valve control:
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3 ways valve switch to room side during External Room Thermo ON OR Solar 3ways valve ON OR Tank
Thermo OFF time, and switch to tank side at External Room Thermo OFF AND Solar 3 ways valve OFF
2 Heat pump operation control:-
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During External Room Thermo ON time: (When room thermo ON, heat pump must operate to room
side)
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Heat pump operate follow normal operation at room side
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During External Room Thermo OFF time:
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Switch 3 ways valve to tank side, IF
Under Solar Priority Set condition:
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Tank temperature < Tank THERMO ON TEMP AND Solar Valve OFF
Under Solar Priority Not Set condition:
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Tank temperature < Tank THERMO ON TEMP
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Switch back 3 ways valve to room side, Heat pump and water pump turn OFF, IF
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External Room Thermo ON back OR
Under Solar Priority Set condition:
ƒ Tank temperature > Tank THERMO OFF TEMP. for continuous 3 minutes OR Solar Valve
ON
Under Solar Priority Not Set condition:
ƒ Tank temperature > Tank THERMO OFF TEMP for continuous 3 minutes
* THERMO ON and THERMO OFF point refer to case below.
Operation condition when 3 ways valve switch to tank side:
ƒ
Tank water set temperature = tank set temperature or [60 ° C] whichever lower
ƒ Heat Pump Water Outlet set temperature is set to [63 ° C] during tank interval
ƒ Initial Tank THERMO ON TEMP = heat pump tank target tempe [-2°C]
Case 1:
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THERMO OFF TEMP:
1.
THERMO OFF TEMP = Heat pump tank target tempe [0 ° C] .
2.
Tank temperature > THERMO OFF TEMP for continuous 10 minutes after compressor off, switch 3
ways valve to room side.
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Next THERMO ON TEMP:
1.
THERMO ON TEMP = Heat pump tank target tempe [-2 ° C] or
2.
If tank temperature < THERMO ON TEMP AND External Room Thermo OFF, switch to tank side.