Panasonic WH-SDC07C3E5, Service Manual

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13.10. Tank Booster Heater Control
13.10.1. Tank booster heater control
Heating operation condition:
1. Booster heater Turn On condition:
• After BOOSTER HEATER DELAY TIMER fulfil 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).
• Tank temperature < tank set tempe [-5
°
C] ,
• 20 minutes since previous heater off.
* BOOSTER HEATER DELAY TIMER is clear when tank heat-up interval end.
2. Booster heater Turn Off condition:-
• Tank temperature > tank set tempe [+2
°
C] for continuous 15 sec
• 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.
13.11. 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.
2. 3 ways valve switch On:
• During 3 ways valve switch On time, the hot water will provide heat capacity to tank side.
3. Stop condition:
• During stop mode, 3 ways valve will be in switch off position
13.12. Sterillization Mode
1. During Sterillization mode, Tank will be heat up to the Sterillize Set temperature for a certain period of time, also set by
controller.
2. The function can only be set on timer to operate once in a week.
3. It will be cancelled even when the temperature is not reached after 4 hours.
4. When tank mode is OFF or disabled, sterillization is cancelled.