Panasonic WH-SDF09C3E8 Service Manual page 48

12.1.4 Heat + Tank Mode Operation
Setting 1: When Heating priority is set by control panel:
1 3 ways valve control:
3 ways valve switch and fix to room side.
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2 Heatpump operation control:
Heatpump operate follow normal operation.
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3 Backup Heater control:
Backup heater operate follow normal operation.
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4 Booster heater control:
Booster heater On/Off follow normal operation.
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5 Solar 3 way valve:
Solar 3 way valve operates follow solar operation specification.
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* Under solar priority is set condition, when solar 3 way valve is ON, booster heater turn OFF.
Setting 2: When heating priority is not set by control panel:
When Solar Priority is set/not set by control panel:
1 3 ways valve control:
3 ways valve switch to room side during heating heat-up interval, and switch to tank side during tank
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heat-up interval. Both mode will switch alternatively.
2 Heatpump operation control:
During heating heat-up interval
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- Follow normal heating operation.
Under solar priority set condition:
- Always detect the tank temperature after heating heat-up interval. Switch only to tank heat-up
interval and start counting tank heat-up timer when tank temperature < THERMO ON TEMP AND
solar 3WV OFF
Under solar priority not set condition:
- Always detect the tank temperature after heating heat-up interval. Switch only to tank heat-up
interval and start counting tank heat-up timer when tank temperature < THERMO ON TEMP
* THERMO ON TEMP is defined form following Case1 to Case4.
During tank heat-up interval
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- Heatpump tank target temperature = Tank set temperature or [55°C] whichever lower
- Heatpump Water Outlet set temperature is set to Maximum [55°C] during tank interval
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