Burner Electrical Connection; Automatic Tightness Test On The Two Gas Train Valves; Checking The Gas Train Filter Element - Viessmann MatriX Service Instructions For Contractors

Commissioning, inspection, maintenance

Burner electrical connection

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A B
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Fig. 26
Burner cables with plugs
A
Power cable with plug
B
!
Please note
Hot components can damage electrical cables.
Never route cables near hot components.
Secure all cables/leads with cable ties if neces-
sary.

Automatic tightness test on the two gas train valves

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
starts up.
If the first valve is not tight, fault code "F E1" is shown
on the burner control unit display. If the second valve is
not tight, fault code "F E2" is displayed.

Checking the gas train filter element

1. Unscrew inlet flange from the gas train.
2. Check strainer at gas train inlet for contamination.
If necessary, remove strainer and clean carefully
with compressed air.
3. Reassemble the gas train in reverse order.
26
D
C
B
A
and
fA lÖ
fÖ
fA
lÖ
Control unit connecting cable with plug
C
Flue gas temperature sensor
D
Check setting of gas pressure switch 2; check con-
necting cable or replace gas train.
Danger
Escaping gas leads to a risk of explosion.
Check the test connectors for gas tightness.
4. Check 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.
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