Checking All Gas Equipment For Soundness At Operating Pressure; Flue Gas Emissions Test - Viessmann VITODENS 333-F WS3A Service Instructions Manual

Further details regarding the individual steps
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
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
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
dual gas groups (check the gas group with your mains gas or LPG supplier).
If the actual CO value deviates by more than 1% for natural gas or 0.5% for
2
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).
Commissioning, inspection, maintenance
content fluctuates between:
2
value with the above CO
2
(cont.)
level at the boiler flue
2
value ranges for the indivi-
2
25