DORCHESTER DR-FC 25, Инструкции по установке, пусконаладке и обслуживанию

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Draining the water heater
Instruction Manual DR-FC 41
gis
4.3 Draining the water
heater
4.3.1 Draining unvented installations
Some service activities require the water heater 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 Figuur 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 water
heater.
5. Turn the water heater OFF (position 0) using the ON/OFF switch on the
control panel. See Figuur 4.3 .
6. Disconnect the water heater by putting the mains switch between the water
heater and the mains power supply to position 0.
7. Shut off the gas supply
d
.
8. Close the stop valve
h
in the hot water pipe.
9. Close the supply valve of the protected cold supply setup
b
.
10. Open the drain valve
f
.
11. Vent the water heater (or installation) so that it drains completely empty.
4.3.2 Draining vented installations
Some service activities require the water heater 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 Figuur 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 water
heater.
5. Turn the water heater OFF (position 0) using the ON/OFF switch on the
control panel. See Figuur 4.3 .
6. Disconnect the water heater by switching the mains isolator off.
7. Shut off the gas supply
d
.
8. Close the stop valve
h
in the hot water pipe.
9. Close the stop valve between the water cistern and the cold water inlet.
10. Open the drain valve
f
.
11. Bleed the water heater (or installation) so that it drains completely empty.
MENU
»OFF
^ ON
È WEEK PROGRAM
Figuur 4.2 Main menu
Figuur 4.3 Control panel