Checking The Filter Element In The Gas Line; Checking Gas Connections For Tightness - Viessmann VITOCROSSAL CRU 800 kW Service Instructions Manual

Checking the gas train filter element
4. Check for gas tightness.
Danger
Escaping gas leads to a risk of explosion.
Check the gas train for gas tightness.
!
Please note
The use of leak detection spray can result in
faulty operation.
Leak detection spray must not come into
contact with electrical contacts.

Checking the filter element in the gas line

If a filter element is fitted in the gas line, check the filter
element and clean or replace if necessary.

Checking gas connections for tightness

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.
Commissioning, inspection, maintenance
(cont.)
Manufacturer's instructions for filter element
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 fitting
■ Joint between the fan and the supply air collector
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