
170
COMMISSIONING
ENGLISH
3. Draining the DHW tank
Use the drain valve shown below to drain the Domestic hot water tank and circuit.
CAUTION
!
Turn off the power supply of the heat pump before draining the unit.
• Turn off the unit
• Close the Cold water supply line
• Connect a hose to the drain cock and lead it into a sink
• Open the drain valve
• Open the tap at the highest level of the DHW system
• If necessary, dismount the DHW plate-heat-exchanger and push out the water by using air
pressure
The drain valve