Panasonic WH-SDC07F3E5 / WH-SDC09F3E5 / WH-UD07FE5 / WH-UD09FE5 Service Manual ▷ View online
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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:
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3 ways valve switch to room side during External Room Thermo ON OR Solar 3 ways valve ON OR Tank
Thermo OFF time, and switch to tank side at External Room Thermo OFF AND Solar 3 ways valve OFF.
2. Heat pump operation control:-
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During External Room Thermo ON time: (When room thermo ON, heat pump must operate to room side)
Heat pump operates follow normal operation at room side.
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During External Room Thermo ON time:
Switch 3 ways valve to tank side, IF
Under Solar Priority Set condition:
o
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Tank temperature < Tank THERMO ON TEMP AND Solar Valve OFF
Under Solar Priority Not Set condition:
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Tan temperature < Tank THERMO ON TEMP
Switch back 3 ways valve to room side, Heat pump and water pump turn OFF, IF
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External Room Thermo ON back OR
Under Solar Priority Set condition:
Tank temperature > Tank THERMO OFF TEMP for continuous 10 seconds OR Solar Valve ON.
Under Solar Priority Not Set condition:
Tank temperature > Tank THERMO OFF TEMP for continuous 10 seconds.
* Judge only after heat pump THERMO OFF
* THERMO ON and THERMO OFF point refer to case below.
* THERMO ON and THERMO OFF point refer to case below.
Operation condition when 3 ways valve switch to tank side:
Tank water set temperature = tank set temperature or [50°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 + [-8°C].
Tank Thermo ON/OFF Characteristic
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THERMO OFF TEMP:
1. THERMO OFF TEMP = Heat pump tank target temperature + [0°C].
2. Tank temperature > THERMO OFF TEMP for continuous 10 seconds after heat pump OFF due to water
2. Tank temperature > THERMO OFF TEMP for continuous 10 seconds after heat pump OFF due to water
thermo, switch 3 ways valve to room side OR
3. Tank temperature > Tank set temperature + 2°C for continuous 10 seconds, switch 3 ways valve to room
side.
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Next THERMO ON TEMP:
1. THERMO ON TEMP = Heat pump tank target temperature + [2°C] or
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF, switch to tank side.
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF, switch to tank side.
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Characteristic of heat pump thermo ON/OFF under tank side condition
Water Outlet Thermo condition
Water Outlet Thermo condition
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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 90 seconds, heat pump OFF
2. Water outlet temperature > Heat pump THERMO OFF TEMP for continuous 90 seconds, heat pump OFF
and water pump continue ON.
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Next THERMO ON TEMP:
1. THERMO ON TEMP = Water inlet when heat pump THERMO OFF + [-3°C].
2. If water outlet temperature < THERMO ON TEMP AND External Room Thermo OFF, heat pump ON.
2. If water outlet temperature < THERMO ON TEMP AND External Room Thermo OFF, heat pump ON.
Water Inlet Thermo condition
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Heat pump THERMO OFF TEMP
1. Water inlet temperature > [55°C] for continuous 30 seconds, heat pump OFF, water pump continue ON.
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Next THERMO ON TEMP:
1. THERMO ON TEMP = Water inlet temperature <55°C.
2. If water inlet temperature < THERMO ON TEMP AND External Room Thermo OFF, heat pump ON.
2. If water inlet temperature < THERMO ON TEMP AND External Room Thermo OFF, heat pump ON.
Solar Operation Condition (Only during solar priority is set condition)
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When solar request ON, solar valve will ON, turn OFF heat pump and water pump and switch 3 ways valve to
room side.
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THERMO ON TEMP:
1. THERMO ON TEMP = Heat pump tank target temperature + [-8°C].
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF AND Solar 3WV OFF, switch
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF AND Solar 3WV OFF, switch
to tank side. Turn ON heat pump after water pump turns ON for 3 minutes.
3. Backup heater control:-
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During External Room Thermo ON time, follow normal backup heater control operation.
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During External Room Thermo OFF time, Backup heater OFF.
4. Booster heater control:-
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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:
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Solar 3 way valve operates follow solar operation specification.
* Under solar priority is et condition, when solar 3WV turns ON, booster heater will turns 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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2 way valve open.
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