Glass BL-ST: 1221114201/03_661Y3300 • A
Maintenance
DRAINING
essential instruction for the safety of persons and the environment
• The water coming out of the drain valve is very hot and can cause very severe
burns. Make sure the area around the hot water flow is clear of people.
Essential instruction for the electrical safety
• Shut down the external electrical supply of the appliance before
draining.
Essential instruction for the correct operation of the system
• Drain the tank if it is not used in winter and is at risk from exposure to ice.
Procedure:
1. Close the filling valve (1) and the stop valve (2).
2. Connect the drain valve (3) to the sewer using a flexible hose.
3. Open the safety valve (4) and the drain valve (3), and drain the water from the
DHW tank to the sewer.
4. To accelerate the tank’s drainage, open a hot water tap (5) located higher
than the tank connection in the DHW circuit.
5. Close the drain valve (3), the safety valve (4) and the hot water tap (5) after
having drained the DHW tank.
BRINGING BACK INTO SERVICE AFTER MAINTENANCE
Refer to "Starting Up", page 23.
EN
26
Cold water
Hot water
5
3
1
2
4
