Tank Booster Heater Control; Three Way Valve Control; Sterillization Mode - Panasonic WH-SHF09D3E5 Service Manual

12.10 Tank Booster Heater Control

12.10.1 Tank Booster Heater Control
Heating operation condition:
1 Booster heater Turn On condition:
After BOOSTER HEATER DELAY TIMER fulfill during heat pump startup time in tank mode, or during
o
switching from heating heat-up interval to tank heat-up interval in heat + tank mode (heating priority not
set).
Tank temperature < Tank set temperature + [-5°C],
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20 minutes since previous heater off.
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* BOOSTER HEATER DELAY TIMER is clear when tank heat-up interval end.
2 Booster heater Turn Off condition:
Tank temperature > Tank set temperature + [+2°C] for continuous 15 secs
o
When BOOSTER HEATER DELAY TIMER start count after switch from heating heat-up interval to tank
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heat-up interval
* DELAY TIMER can be set by control panel.

12.11 Three Way Valve Control

Purpose:
- 3 ways valve is used to change flow direction of hot water from heat pump between heating side and tank side
Control contents:
1 3 ways valve switch Off:
During 3 ways valve switch Off time, the hot water will provide heat capacity to heating side.
o
2 3 ways valve switch On:
During 3 ways valve switch On time, the hot water will provide heat capacity to tank side.
o
3 Stop condition:
During stop mode, 3 ways valve will be in switch off position
o

12.12 Sterillization Mode

Purpose:
Boil tank temperature to customer set boiling temperature to operate sterilization.
o
Control start condition:
Tank connection set to YES by remote controlller
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Serilization function selection is YES
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Sterilization signal received from remote controller by timer.
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Control stop condition:
After boiling timer completed. Boiling timer start counting once tank achieve boiling set temperature OR
o
After 4 hours of operation since sterilization function start OR
o
Control content:
Once the sterilization function enable, set the target tank temperature to Boiling Set Temperature.
o
Booster heater will allow to ON during solar priority SET condition.
o
Booster heater OFF Temp. = Boiling Set Temperature + 2°C
Booster heater ON Temp. = Boiling Set Temperature - 5°C
Boiling timer which set by remote controller will start count after tank achieve boiling set temperature.
o
Sterilization operation will end after complete boiling timer or Max 4 hrs from function start.
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Target tank temperature will set back to normal tank set temperature.
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* Tank heater control is not affected by solar pump when solar priority set.
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