Panasonic WH-UD09CE5-A [72/146] Solar operation optional

13.14. Solar operation (Optional)

13.14.1. 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).

13.14.2. Solar operation control

When solar priority is SET

1. Operation condition:

a. Solar pump 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 [EEPROM 1 : 70] °C.

2. Stop condition:

a. Solar pump 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 [EEPROM 2 : 77] °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.

When solar priority is NOT SET