Solar Operation (Optional) - Panasonic WH-MDC05J3E5 Service Manual

14.18.1 Zone Anti-Freeze Control

If buffer tank selection is "NO" and Anti- Freeze function select "NO" from remote control, this control cannot
activate.
Start condition:

After [5] min from previous Zone pump off. AND

Outdoor air temp < [3] °C OR Outdoor sensor is abnormal. AND

Zone water temperature < [6] ° C OR Zone Sensor Short or Open
Cancel condition:

After water Zone pump ON [4] min AND

Outdoor air temp ≥ [4]°C OR

During -5 °C ≤ Outdoor air temp < [4] °C OR
Zone water temperature sensor > [8] °C

During Outdoor air temp < [-5] °C
Zone water temperature sensor > [20] °C
*However, Zone water temperature sensor is Open or Short, Condition C and D is ignored.

14.19 Solar Operation (Optional)

14.19.1 Solar Operation:
Solar function:

This function allow user to control the solar pump to operate depend on the solar sensor reading compare to the
tank installed. Solar pump will circulate the hot water energy store at solar panel to heat up the DHW Tank or
Buffer Tank.
Solar Connection Diagram:

Solar function can only enable when the Optional PCB is connected.

Few part as below need to install to control the solar operation:
Solar Panel
o
Solar Pump
o
Solar Panel Sensor
o
Tank Sensor (Buffer tank sensor OR DHW Tank sensor depend on the connection direction)
o
* During Solar Connection to the system, installer need to alert on the high water temperature may flow to the
zone circuit or DHW piping circuit. Therefore pipe which withstand higher water temperature need to be
installed.
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