6
The water in the boiler must not freeze. Frozen
water in the boiler can cause damage or a defect
in the appliance. If necessary, the contents of the
boiler can be drained via the non-return/overpres-
sure valve and the drain plug. Proceed as follows:
• Ensure that any water that leaks from the
non-return/overpressure valve and the drain
plug can drain away safely. This is important to
prevent possible water damage.
• Disconnect the water heater from any live
electrical wiring.
• Shut off the cold water supply.
• Open the drain plug using the vent key provi-
ded.
• Tilt the small lever of the check/relief valve 90 °.
• The water should now drain away. Drainage is
complete when no more water comes out of
the valves.
• Small amounts of water remain in the boiler
even after emptying. This is fine and does not
cause any damage.
Drainage
Current source
Usable Energy Sources
The draining water can be hot - risk of scalding!
These steps do not ensure complete emptying of the water tank.
Connect the power supply only when the water heater is filled.
Source
Voltage
Type
PV module
0 VOC – 42.4 VOC
–
Battery
12 V, 24 V
Lead acid, LiFePO4
External energy management
12 V – 42.4 V
–
EN
When connecting
several photovoltaic
modules,
these must only be connected in
parallel.
