Viessmann B1HF - Boiler Removal and Circulation Pump Checks

83
Removing the boiler from the pre-plumbing jig or mounting frame
1.
3.
4.
37
37
2.
Fig. 42
Note
Use new gaskets and, if required, new locking ring
connections when assembling.
Internal gasket diameter:
■
Gas connection Ø 18.5 mm
■
Connections on the heating water side Ø 17.0 mm
Gaskets and locking ring connections are available as
spare parts (if required).
Note
When carrying out any work on gas connection fittings,
counterhold 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.
Status/checking/diagnosing the internal circulation pump
The internal circulation pump is fitted with a status
LED.
Troubleshooting
Repairs (cont.)
6167586
Diagnosis