Panasonic WH-SXC09D3E5 Service Manual page 48

Under Solar Priority Not Set Condition:
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 room heat-up interval, and switch to tank side during tank heat-up interval. Both
mode will switch alternatively. Tank mode is the Initial running mode of this heat + tank mode (heating no priority).
2. Heat pump operation control:
a. During room heat-up interval
• Follow normal heating operation.
Under solar priority set condition:
- Switch to tank heat-up interval and start counting tank heat-up timer when External Room Thermo OFF AND solar 3WV
OFF AND Tank temperature < THERMO ON TEMP (End Room Interval Early) OR
- Switch to tank heat-up interval and start counting tank heat-up timer when tank temperature < THERMO ON TEMP AND
solar 3WV OFF after room heat-up timer complete
Under solar priority not set condition:
- Switch to tank heat-up interval and start counting tank heat-up timer when External Room Thermo OFF AND Tank
temperature < THERMO ON TEMP (End Room Interval Early) OR
- Switch to tank heat-up interval and start counting tank heat-up timer when tank temperature < THERMO ON TEMP after
room heat-up interval timer complete
* THERMO ON TEMP is defined form following Case1 to Case4.
b. During tank heat-up interval
• Heat pump tank target temperature = tank set temperature or [55 C] whichever lower
• Heat Pump Water Outlet set temperature is set to [53 C] during tank interval
• Initial Tank THERMO ON TEMP = heat pump tank target temperature + [-3 C]
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