Panasonic WH-SHF09D3E5, Service Manual

Page: 50 / 114

50
12.10 Tank Booster Heater Control
12.10.1 Tank Booster Heater Control
Heating operation condition:
1 Booster heater Turn On condition:
o
After BOOSTER HEATER DELAY TIMER fulfill during heat pump startup time in tank mode, or during
switching from heating heat-up interval to tank heat-up interval in heat + tank mode (heating priority not
set).
o
Tank temperature < Tank set tempe [-5 ° C] ,
o
20 minutes since previous heater off.
* BOOSTER HEATER DELAY TIMER is clear when tank heat-up interval end.
2 Booster heater Turn Off condition:
o
Tank temperature > Tank set tempe [+2 ° C] for continuous 15 secs
o
When BOOSTER HEATER DELAY TIMER start count after switch from heating heat-up interval to tank
heat-up interval
* DELAY TIMER can be set by control panel.
12.11 Three Way Valve Control
š
Purpose:
- 3 ways valve is used to change flow direction of hot water from heat pump between heating side and tank side
š
Control contents:
1 3 ways valve switch Off:
o
During 3 ways valve switch Off time, the hot water will provide heat capacity to heating side.
2 3 ways valve switch On:
o
During 3 ways valve switch On time, the hot water will provide heat capacity to tank side.
3 Stop condition:
o
During stop mode, 3 ways valve will be in switch off position
12.12 Sterillization Mode
š
Purpose:
o
Boil tank temperature to customer set boiling temperature to operate sterilization.
š
Control start condition:
o
Tank connection set to YES by remote controlller
o
Serilization function selection is YES
o
Sterilization signal received from remote controller by timer.
š
Control stop condition:
o
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
š
Control content:
o
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.
ƒ Booster heater OFF Temp. = Boiling Set Tempe 2°C
ƒ Booster heater ON Temp. = Boiling Set Temperature - 5°C
o
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.
o
Target tank temperature will set back to normal tank set temperature.
* Tank heater control is not affected by solar pump when solar priority set.