73
Note
Use new gaskets and, if required, new locking ring
connections when assembling.
Internal gasket diameter:
■
Gas connection Ø 18.5 mm
■
Heating water side connections Ø 17.0 mm
Gaskets and locking ring connections are available as
individual parts (if required).
Note
When carrying out any work on gas connection fittings,
hold with a suitable tool. Never transfer any forces to
the internal components.
Danger
Escaping gas leads to a risk of explosion.
Check all connections on the gas side (also
inside the appliance) for tightness.
Checking the temperature sensors
C
2
1
4
3
1
3
2
4
B
A
Fig. 40
Heat generator circuit flow temperature sensor
(dual sensor)
1.
Check the leads and plugs of flow temperature
sensors
A
.
2.
Disconnect the leads from flow temperature sen-
sors
A
.
Troubleshooting
Repairs
(cont.)
6173886
Diagnosis
