Viessmann VITODENS 200 WB2A, Installation & Servicing Instructions Manual

Page: 41 / 80

5 Commissioning and Testing
d)
Remove the pressure gauge. Tighten the inlet pressure test point screw.
e)
Restart the appliance and check for leakage of gas from the pressure test nipple.
5.6 Commissioning the Boiler
Fig 5/D: Gas Control
Vitodens 200 is set up in the factory for natural gas and can be converted to LPG Propane using
a conversion kit. During commissioning or after maintenance the CO2 level can be checked at
the boiler flue adaptor position (A) as illustrated in Figure 5/E.
Subject to Wobbe index, the CO2 content fluctuates between:
7.4% to 10.5% for natural gas
8.5% to 11.0% for LPG Propane
Compare the actual CO2 value measured at position (A) with the above CO2 value ranges for the
individual gas groups. If the actual CO2 value deviates by more than 1% for natural gas or 0.5%
for LPG, proceed as follows:-
Check that the correct gas restrictor has been fitted.
Check the balanced flue system for soundness.
Figure 5/E: Flue Gas Sampling
41