Installing The Burner; Checking Both Gas Train Valves Automatically For Gas Tightness; Checking All Gas Connections For Tightness - Viessmann VITOCROSSAL 200 Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps

Installing the burner

A
B
C
1. Install fan E.
Note
Ensure that the gasket between the
fan casing and the burner flange is
correctly positioned.

Checking both gas train valves automatically for gas tightness

The burner control unit automatically
checks the valves for tightness when the
burner is started. If the valves are gas-
tight, the burner enters standard mode
and the burner starts.
If the first valve is not tight, fault code
"F AE" is shown on the burner control
unit display; if the second valve is not
tight, fault code "F AF" is displayed.

Checking all gas connections for tightness

Danger
Escaping gas leads to a risk of
explosion.
Always carry out the following
steps.
26
2. Plug the connecting cables into fan
E.
3. Secure Venturi mixing pipe D with
gas train A and gas supply pipe
B on fan E, and plug in connecting
cables.
E
4. Tighten fitting C on gas supply pipe
D
B.
In either case, the gas train must be
replaced.
1. Insert new gaskets in all gas fittings
that have been opened and tighten
those fittings afterwards.
2. Open the gas shut-off valve.
(cont.)
Danger
Escaping gas leads to a risk of
explosion.
Check the fitting and gasket
between the fan casing and
the burner flange for gas tight-
ness.
Danger
Escaping gas leads to a risk of
explosion.
Check the test nipple for gas
tightness.