Panasonic WH-SXF12D6E5 Service Manual page 44

Case 1:
• THERMO OFF TEMP:
1. THERMO OFF TEMP = Heat pump tank target temperature + [+2 C].
2. Tank temperature > THERMO OFF TEMP for continuous 3 minutes, switch 3 ways valve to room side.
• Next THERMO ON TEMP:
1. THERMO ON TEMP = Heat pump tank target temperature + [-3 C].
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF, switch to tank side.
Case 2:
• Heat pump THERMO OFF TEMP:
1. Heat pump THERMO OFF TEMP = 53 C + [+4 C].
2. Water outlet temperature > Heat pump THERMO OFF TEMP for continuous 3 minutes, switch 3 ways valve to room
side.
• Next THERMO ON TEMP:
1. THERMO ON TEMP = Tank temp. when heat pump thermo off + [-3 C].
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF, switch to tank side.
Case 3:
• Heat pump THERMO OFF TEMP:
1. Water inlet temperature > 52 C for continuous 60 secs, switch 3 ways valve to room side.
• Next THERMO ON TEMP:
1. THERMO ON TEMP = Tank temp. when heat pump thermo off + [-3 C].
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF, switch to tank side.
Case 4 (Only during solar priority is set condition):
• When solar request ON, solar valve will ON and switch 3 ways valve to room side
• THERMO ON TEMP:
1. THERMO ON TEMP = Heat pump tank target temperature + [-3 C].
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF AND Solar 3WV OFF, switch to tank
side.
3. Backup Heater control:-
a. During External Room Thermo ON time, follow normal backup heater control operation
b. During External Room Thermo OFF time, Backup heater OFF
4. Booster heater control:
• Booster heater On/Off follow normal operation.
* Under solar priority is set condition, when solar 3 way valve is ON, booster heater turn OFF.
5. Solar 3 way valve:
• Solar 3 way valve operates follow solar operation specification.
* Under solar priority is set condition, when solar 3WV turn ON, booster heater will turn OFF and 3 ways valve switch to room
side.
* Under solar priority is not set condition, solar 3WV will OFF when heat pump operate to tank side.
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