Draining the water heater
Instruction manual DR-LA
41
gis
7. Vent the water heater (or installation) so that it drains completely.
4.3.2
Draining vented installations
Some service activities require the water heater to be drained. The procedure
is as follows:
1. Shut the water heater down by putting the On/Off switch to
position 0
.
2. Switch the mains isolation off.
3. Shut off the gas supply
h
.
4. Close the stop valve
i
in the hot water pipe.
5. Close the stop valve between the water tank and the cold water inlet.
6. Open the drain valve
g
.
