30
Danger
Escaping gas leads to a risk of explosion.
Always carry out the following steps:
!
Please note
The use of leak detection spray can result in
faulty operation.
Leak detection spray must not come into contact
with electrical contacts.
1.
Insert new gaskets in all gas fittings that have been
opened and retighten them.
2.
Open the gas shut-off valve.
3.
Check the inlet joints of the gas train for tightness.
4.
Start the burner (see page 9).
5.
Check for tightness:
■
Outlet joints of the gas train
■
Joint between the fan and the boiler door
■
Joint between the fan and the Venturi pipe
Checking the gaskets on the flue gas side
10 Nm
3
A
B
C
Fig. 28
1.
Check flue gas collector seals
A
for tightness.
Note
Check seals at full load operation, for example
using an inspection mirror, gas sensor or thermal
image camera. If required, remove the thermal
insulation components. Traces of condensate on
the outside of flue gas collector
A
also indicate a
leak.
2.
Check lip seal
B
of the boiler flue connection for
tightness.
3.
If required, retighten the flue gas collector at ten-
sioning toggles
C
; tighten screws diagonally with
10 Nm. Replace lip seal
B
if it leaks.
Performing final checks
1.
Carry out final checks in accordance with the
points on pages 16 to 20.
2.
Record actual values in the report (on page 72).
Commissioning, inspection, maintenance
Checking gas connections for tightness
5812086
