Panasonic WH-SDC09C3E8, Service Manual

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12.1.7 Heat + Tank Mode Operation
Setting 1: When Heating priority is set by control panel:
1 3 ways valve control:
o
3 ways valve switch and fix to room side.
2 Heatpump operation control:
o
Heatpump operate follow normal operation
3 Backup Heater control:
o
Backup heater operate follow normal operation
4 Booster heater control:
o
Booster heater On/Off follow normal operation
5 Solar 3 way valve:
o
Solar 3 way valve operates follow solar operation specification.
6 2 ways valve control:
o
2 ways valve opens.
* 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:
o
3 ways valve switch to room side during heating heat-up interval, and switch to tank side during tank
heat-up interval. Both mode will switch alternatively.
2 Heatpump operation control:
a.
During heating heat-up interval
o
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.
b.
During tank heat-up interval
o
Heatpump tank target temperature = Tank set temperature or [55°C] whichever lower
o
Heatpump Water Outlet set temperature is set to Maximum (55°C) during tank interval
Case 1:
o
THERMO OFF TEMP:
1.
THERMO OFF TEMP = Heatpump tank target tempe [+2 ° C] .
2.
Tank temperature > THERMO OFF TEMP for continuous 3 minutes, switch 3 ways valve to room side.
End Tank heat-up interval and start count heating heat-up interval.
o
THERMO ON TEMP:
1.
THERMO ON TEMP = Heatpump tank target tempe [-3 ° C] .
2.
After Heating heat-up interval, always detect tank temperature. Switch to next tank heat-up interval
when tank temperature < THERMO ON TEMP.