Panasonic WH-SXF12D6E5, Service Manual

Page: 46 / 120

46
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 tempe
[-3 C]
Case 1:
• THERMO OFF TEMP:
1. THERMO OFF TEMP = Heat pump 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.
• THERMO ON TEMP:
1. THERMO ON TEMP = Heat pump 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.
Case 2:
• Heat pump THERMO OFF TEMP:
1. Heat pump THERMO OFF TEMP = 53 C + [+4 C] .
a. Water outlet temperature > Heat pump THERMO OFF TEMP for continuous 90 seconds, switch 3 ways valve to room
side. End Tank heat-up interval and start count heating heat-up interval.
• THERMO ON TEMP:
1. THERMO ON TEMP = Tank temp. when heat pump thermo off + [-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.
Case 3:
• Heat pump THERMO OFF TEMP:
1. Water inlet temperature > 52 C for continuous 60 secs, switch 3 ways valve to room side. End tank heat-up interval
and start count heating heat-up interval.
• THERMO ON TEMP:
1. THERMO ON TEMP = Tank temp. when heat pump thermo off + [-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.