Shutting Down The Boiler; Removing The Boiler From The Pre-Plumbing Jig - Viessmann VITODENS 100-W Installation And Service Instructions Manual

Troubleshooting
Repairs
(cont.)

Shutting down the boiler

1. Turn off the power supply at the ON/OFF switch.
2. Shut off the gas supply.

Removing the boiler from the pre-plumbing jig

Fig. 29
Note
When assembling, use new gaskets and – if necessary
– new locking ring fittings:
Gas connection Ø 18.5 mm
Gaskets and locking ring connections are available as
individual parts (if required).
62
3. If the boiler needs to be removed:
Isolate the system from the power supply, e.g. by
■
removing the separate fuse or by means of a
mains isolator, and check that it is no longer live.
■ Safeguard the system against reconnection.
■ Disconnect the balanced flue system.
Drain the boiler on the heating water side.
■
Disconnect the on-site cables/leads.
■
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.