Checking The Burner Gasket And Burner Gauze Assembly - Viessmann B1HF Installation And Service Instructions Manual

Checking the burner gasket and burner gauze assembly

A
Fig. 31
Check burner gauze assembly
mal insulation ring and gasket
F
remove and replace components if they are damaged
or worn.
Note
If replacing the burner gauze assembly, also replace
the gauze assembly gasket and the fixing screw.
1. Disconnect plug with ignition electrode leads from
ignition unit A .
2. Remove electrodes
B
3. Undo Torx screw
C . Hold onto burner gauze
assembly when undoing the screw.
D
4. Remove burner gauze assembly
and thermal insulation ring
for damage.
5. Install new burner gasket
installation position. Align the tab as per the dia-
gram.
C
B
, electrodes , ther-
D B
for damage. Only
G
.
with gasket
D
F . Check components
. Observe correct
G
Commissioning, inspection, maintenance
G
6. Insert thermal insulation ring
assembly with gasket
D
installation position. Align the tab as per the dia-
gram.
7. Align the hole in burner gauze assembly
the burner door pin.
Secure burner gauze assembly
with Torx screw
Tighten screws as tightly as necessary and ensure
that the components are undamaged and are func-
tioning correctly throughout service life.
Observe torque settings if a torque wrench is avail-
able.
Torque: 3.0 Nm.
8. Check thermal insulation ring
E
9. Fit electrodes
B
chapter.
Tighten screws as tightly as necessary and ensure
that the components are undamaged and are func-
tioning correctly throughout service life.
Observe torque settings if a torque wrench is avail-
able.
Torque: 4.5 Nm.
D
E
F
and burner gauze
F
. Observe correct
E
D
and gasket
D
C .
for firm seating.
F
. Check clearances, see following
with
E
47