Cleaning The Sight Glass In The Boiler Door; Closing The Boiler Door; Checking The Thermal Insulation; Checking The Mixer For Ease Of Operation And Leaks - Viessmann VITOCROSSAL 300 Type CT3 Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps

Cleaning the sight glass in the boiler door

A
Check gaskets A and hose connection
B for leaks.

Closing the boiler door

1. Tighten the screws on the boiler door
evenly and diagonally.

Checking the thermal insulation

Check the thermal insulation fit and re-
align if required.

Checking the mixer for ease of operation and leaks

1. Remove the motorised lever from the
mixer handle.
2. Check the mixer for ease of opera-
tion.
14
B
2. Install the gas supply pipe and check
for tightness.
3. Check the mixer for leaks. Replace
the O-rings if the mixer leaks.
4. Snap the motorised lever into place.
(cont.)