A.O. Smith SGS - 100, Installation, User And Service Manual

Page: 63 / 121

Draining
60 Instruction manual SGS
6
gis
5. Switch the water heater OFF (position 0) using the ON/OFF switch on the
control panel.
6. Isolate the water heater from the power supply by setting the isolator
between the water heater and the mains power supply to position 0.
7. Shut off the gas supply (10).
8. Close the stop valve (11) in the hot water pipe.
9. Close the supply valve (4) in the cold water inlet (A).
10. Open the drain valve (9).
6.2 Draining vented
installations
Some service activities require the water heater to be drained. The procedure
is as follows:
1. Activate the
MENU
with .
2. Position the cursor in front of
OFF
.
3. Confirm
OFF
with .
4. Wait until the fan has stopped. The icon is then dimmed.
Caution
Failure to wait until the fan stops can cause damage to the water
heater.
5. Switch the water heater OFF (position 0) using the ON/OFF switch on the
control panel.
6. Isolate the water heater from the power supply by setting the isolator
between the water heater and the mains power supply to position 0.
7. Shut off the gas supply (10).
8. Close the stop valve (11) in the hot water pipe.
9. Close the stop valve (4) between the cold water head tank and the cold
water inlet (A).
10. Open the drain valve (9).
11. Bleed the water heater (or installation) so that it drains completely.
6.3 Draining solar
heating system
Note
No special safety measures are required when working with the diluted
glycol solution specified by the manufacturer. For more information about the
fluid, please contact the manufacturer.
1. Activate the
MENU
with .
2. Position the cursor in front of
OFF
.
3. Confirm
OFF
with .
4. Wait until the fan has stopped. The icon is then dimmed.
Caution
Failure to wait until the fan stops can cause damage to the water
heater.
Warning
The fluid in the pipes and the pipes themselves can be extremely hot! You
should therefore wait until the water heater has cooled down sufficiently.
MENU
»OFF
^ ON
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