Tank Booster Heater Control; Three Way Valve Control; Sterillization Mode - Panasonic WH-SDC09C3E8 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 fulfil during heatpump 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],
o
20 minutes since previous heater off.
o
* 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 sec
o
When BOOSTER HEATER DELAY TIMER start count after switch from heating heat-up interval to tank
o
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 heatpump 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

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.
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