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SAFETY INSTRUCTIONS FOR DRAINING
Essential instruction for the safety of persons and the environment
•
Essential instruction for the electrical safety
•
Essential instructions for the correct operation of the system
•
EN
DRAINING THE DHW TANK
To drain the DHW tank:
1.
Open fully the hot water tap (3) for at least 60 minutes to make sure the DHW tank has
cooled down sufficiently.
2.
Close the filling valve (1) and the stop valve (4).
3.
Connect the drain valve (2) to the sewer using a flexible hose.
4.
Open the drain valve (2) and drain the water from the DHW tank to the sewer.
5.
To accelerate the tank's drainage, open a hot water tap located higher than the tank
connection in the DHW circuit.
6.
Close the drain valve (2) and the hot water tap (3) after having drained the DHW tank.
DRAINING THE PRIMARY CIRCUIT
To drain the primary circuit of the water heater:
1.
Stop the charging pump.
2.
Isolate the primary circuit by closing the stop valves (1).
3.
Connect the drain valve (2) to the sewer using a flexible hose.
4.
Open the drain valve (2) and drain the water from the primary circuit to the drain.
5.
Close the drain valve (2) after draining the tank.
BRINGING BACK INTO SERVICE AFTER MAINTENANCE
Refer to chapter "Starting up", page 16
EN -
18
The water coming out of the drain valve is hot and can cause severe burns.
Make sure the area around the hot water flow is clear of people.
Shut down the external electrical supply of the appliance before draining.
Drain the tank if it is not used in winter and is at risk from exposure to ice. If the
primary circuit water contains antifreeze, only the DHW tank must be drained. If
the heating circuit does not contain antifreeze, the heating circuit and domestic
water must be drained.
Maintenance
661Y3400 • A
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