3.
Top up your heating system with
water and vent until the filling pres-
sure of a cooled system is 0.1 to
0.2 bar higher than the inlet pres-
sure of the diaphragm expansion
vessel.
Permiss. operating pressure: 3 bar
Checking all gas equipment for soundness at operating pres-
sure
Danger
Escaping gas leads to a risk of
explosions.
Check gas equipment for
soundness.
Flue gas emissions test
The Vitodens 333-F is preset for natural gas E in the factory and can be con-
verted to natural gas LL or LPG P using a conversion kit.
During commissioning or maintenance, check the CO
2
level at the boiler flue
outlet.
Note
The Matrix burner of the Vitodens 333-F is preset respectively for the entire gas
category. The burner requires no modification or readjustment.
Subject to the Wobbe index, the CO
2
content fluctuates between:
&
6.6 to 10.0% for natural gas E
&
7.0 to 10.0% for natural gas LL
&
8.5 to 10.5% for LPG P
Compare the actual CO
2
value with the above CO
2
value ranges for the indivi-
dual gas groups (check the gas group with your mains gas or LPG supplier).
If the actual CO
2
value deviates by more than 1% for natural gas or 0.5% for
LPG, check the following:
&
Check that the correct gas restrictor has been fitted.
&
Check the balanced flue system for soundness, see page 17.
Maintain limits to EN 483 and EN 297 (CO content < 1000 ppm).
Further details regarding the individual steps
(cont.)
25
Commissioning, inspection, maintenance
5692
731
GB
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