18
Shutting down the system
1.
Switch OFF the mains isolator or the
power supply and safeguard against
unauthorised reconnection.
Danger
Mains voltage can be
extremely dangerous.
For maintenance work, isolate
the gas fan from the power
supply.
2.
Pull connecting plugs
fÖ
,
fA
,
lÖ
and
fÖ
/
aBH
from the burner.
3.
Close the gas shut-off valve.
Opening the boiler door
A
C
B
E
D
F
1.
Remove the burner hood
A
.
2.
Release burner cables
C
with plug
fA
and
lÖ
from the burner control
unit and route them out of the burner
casing.
3.
Release power cable
D
with plug
fÖ
and control unit cable
F
with plug
fÖ
/
aBH
from the burner and strain
relief, and route them out of the
burner casing.
4.
Remove gas supply pipe
B
.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5692 908 GB