Panasonic WH-SDC07F3E5 / WH-SDC09F3E5 / WH-UD07FE5 / WH-UD09FE5 Service Manual ▷ View online
73
12.14 Solar Operation (Optional)
12.14.1
Solar Operation:
1 External solar heat source signal can be connect to unit for proper control of heat source switching during
tank boiling time.
2 Control according to preset whether solar priority is set or not.
3 When tank connection is NOT set at SETTING mode, solar operation is disabled.
4 When Pump A (from solar pump station) is detected On through connection Y3 and Y4, then the Solar pump
3 When tank connection is NOT set at SETTING mode, solar operation is disabled.
4 When Pump A (from solar pump station) is detected On through connection Y3 and Y4, then the Solar pump
3 Way Valve is requested ON (Refer to figure below).
Solar pump 3 Way
Valve
12.14.2
Solar Operation Control
When solar priority is SET
1 Operation condition:
a 3 way valve operates if all of the following conditions are fulfilled:
Power On. (regardless operation ON or OFF)
There is operation request from solar pump station.
Tank hot water temp is below solar on upper limit temp 72°C.
2 Stop condition:
a 3 way valve stops operating when:
No power supply to unit OR
There is NO operation request from solar pump station OR
Tank hot water temp is above solar off upper limit temp 80°C.
* heat pump OFF OR operate to room side when solar pump operate during solar priority set.
* booster heater OFF when solar pump operate during solar priority set.
* booster heater OFF when solar pump operate during solar priority set.
When solar priority is NOT SET
1 Operation condition:
a 3 way valve operates if all of the following conditions are fulfilled:
Power On. (regardless operation ON or OFF)
There is operation request from solar pump station.
Tank hot water temp is below solar on upper limit temp 72°C.
Heat pump thermo OFF in tank mode OR Heat pump operate to room side
(during operation ON and tank mode selected).
2 Stop condition:
a 3 way valve stops operating when:
No power supply to unit OR
There is NO operation request from solar pump station OR
Tank hot water temp is above solar off upper limit temp 80°C.
Heat pump thermo ON and operate to tank side. (during operation ON and tank mode selected)
74
Solar Operation Chart in different mode and condition
Tank Mode (Solar Priority SET condition)
Tank Mode (Solar Priority SET condition)
Tank Mode (Solar Priority NOT SET condition)
75
Heat + Tank Mode (Heating Priority NOT SET) (Solar Priority SET condition)
tank side
3 way valve
room side
Heatpump
On
Off
T1
T2
T2
T3
Booster
heater
heater
Solar request
Solar 3 way
valve
valve
On
Off
On
Off
On
Off
When solar 3 way valve turn on during Tank interval, cancel
Tank interval immediately and switch 3-way valve to the
room side and start a heating/cooling interval.
Tank interval immediately and switch 3-way valve to the
room side and start a heating/cooling interval.
Booster heater Off as solar
3 way valve On
Booster heater On as
solar 3 way valve Off
After heating/cooling interval, stand by to go in tank side after solar 3 way
valve request off, and fulfil tank therno on (heat pump)
valve request off, and fulfil tank therno on (heat pump)
T1
Heat + Tank Mode (Heating Priority NOT SET) (Solar Priority NOT SET condition)
T1 - Heating
T2 - Tank interval
T3 - Booster heater delay timer
tank side
3 way valve
room side
Heatpump
On
Off
T1
T2
T2
T3
T3
Booster
heater
heater
Solar request
Solar 3 way
valve
valve
On
Off
On
Off
On
Off
Booster Heater
Thermo Off
T1
Solar off
due to upper limit
Heat pump
Thermo Off
76
Heat + Tank Mode (Heating Priority SET) & Cool + Tank Mode
3 way valve
Heatpump
On
Off
Booster
heater
heater
Solar request
Solar 3 way
valve
valve
On
Off
On
Off
On
Off
Room Side
On
Off
On
Off
Booster heater
Thermo Off
Booster heater Off due to solar 3
way valve on
Solar priority set
Solar priority not
set
set
Solar priority set
Solar priority not
set
set
Solar off
due to upper limit
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