Lochinvar CH 100 CE, Installation, Commissioning, User & Maintenance Instructions

Page: 40 / 66

Draining
40 Instruction manual CH
6
gis
6.1 Draining unvented
installations Some service activities require the water heater 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.
6.2 Draining vented
installations
Some service activities require the water heater 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.