A.O. Smith 28 30 50 60, Installation & Service Manual

Page: 41 / 96

Draining the appliance
Release R.1.3 UK 41
gis
4.3 Draining the
appliance
4.3.1 Draining unvented installations
Some service activities require the appliance to be drained. The procedure is as
follows:
1. Activate the
MENU
with
B
.
2. Use
H
and
L
to place the cursor beside
OFF
. See Figure 4.2 .
3. Confirm
OFF
with
E
.
4. Wait until the fan has stopped. The
S
icon is then dimmed.
c Note
Failure to wait until the fan stops can cause damage to the appliance.
5. Turn the appliance OFF (position 0) using the ON/OFF switch on the
control panel. See Figure 4.3 .
6. Disconnect the appliance by putting the mains switch between the appliance
and the mains power supply to position 0.
7. Shut off the gas supply
h
.
8. Close the stop valve
i
in the hot water pipe.
9. Close the supply valve of the cold water supply
a
.
10. Open the drain valve
g
.
11. Bleed the appliance (or installation) so that it drains completely empty.
4.3.2 Draining vented installations
Some service activities require the appliance to be drained. The procedure is as
follows:
1. Activate the
MENU
with
B
.
2. Use
H
and
L
to place the cursor beside
OFF
. See Figure 4.2 .
3. Confirm
OFF
with
E
.
4. Wait until the fan has stopped. The
S
icon is then dimmed.
c
Note
Failure to wait until the fan stops can cause damage to the appliance.
5. Turn the appliance OFF (position 0) using the ON/OFF switch on the
control panel. See Figure 4.3 .
6. Disconnect the appliance by putting the mains switch between the appliance
and the mains power supply to position 0.
7. Shut off the gas supply
h
.
8. Close the stop valve
i
in the hot water pipe.
9. Close the stop valve between the water cistern and the cold water inlet.
10. Open the drain valve
g
.
11. Bleed the appliance (or installation) so that it drains completely empty.
MENU
»OFF
^ ON
È WEEK PROGRAM
Figure 4.2 Main menu
Figure 4.3 ThermoControl
0
I