Solar Operation (Optional) - Panasonic WH-MDC09C3E8 Service Manual

12.14 Solar Operation (Optional)

12.14.1 Solar Operation
1 Control according to preset whether solar priority is set or not.
2 When tank connection is NOT set at SETTING mode, solar operation is disabled.
3 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).
12.14.2 Solar Operation Control
When solar priority is SET
1 Operation condition:
Solar pump operates if all of the following conditions are fulfilled:
o
i) Power On. (regardless operation ON or OFF)
ii) There is operation request from solar pump station.
iii) Tank hot water temp is below solar on upper limit temp [EEPROM 1 : 70]°C.
2 Stop condition:
Solar pump stops operating when:
o
i) No power supply to unit OR
ii) There is NO operation request from solar pump station OR
iii) Tank hot water temp is above solar off upper limit temp [EEPROM 2 : 77]°C.
* heatpump 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.
When solar priority is NOT SET
1 Operation condition:
Solar pump operates if all of the following conditions are fulfilled:
o
i) Power On. (regardless operation ON or OFF).
ii) There is operation request from solar pump station.
iii) Tank hot water temp is below solar on upper limit temp [EEPROM 1 : 70]°C.
iv) Heatpump thermo OFF in tank mode OR Heatpump operate to room side
(during operation ON and tank mode selected).
2 Stop condition:
Solar pump stops operating when:
o
i) No power supply to unit OR
ii) There is NO operation request from solar pump station OR
iii) Tank hot water temp is above solar off upper limit temp [EEPROM 2 : 77]°C.
iv) Heatpump thermo ON and operate to tank side.
(during operation ON and tank mode selected).
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