6
6.1Draining unvented installations
Draining | gis |
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Some service activities require the appliance to be drained. The procedure is as follows:
1.Shut down the appliance by setting the ON/OFF switch on the control panel to position 0.
2.Isolate the water heater from the power supply by putting the isolator between the appliance and the mains power supply to position 0.
3.Shut off the gas supply (10).
4.Close the stop valve (11) in the hot water pipe.
5.Close the supply valve of the cold water supply (A).
6.Open the drain valve (9).
7.Bleed the appliance (or installation) so that it drains completely.
46 | Instruction manual BFM |
