A.O. Smith ADM - 80 - Manual (Page 45)

Instruction manual ADM 45
gis
6.2 Draining vented
installations 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 stop valve (4) between the cold water head tank and the cold
water inlet.
6. Open the drain valve (9).
7. Bleed the appliance (or installation) so that it drains completely.