Setting The Gas Type; Commissioning The System - Viessmann Vitocrossal CRU 800 Service Instructions For Contractors

Commissioning, inspection, maintenance

Setting the gas type

In the delivered condition, the boiler is preset for natu-
ral gas E and can be changed over to natural gas LL.
The setting can later be changed back to natural
gas E.
A
Fig. 3
Adjusting screw
A
1. Turn the adjusting screw on the main volume but-
terfly of the gas train fully towards "
2. Turn the adjusting screw in direction "+" as detailed
in the table below:
Rated heating output
800 kW
1000 kW

Commissioning the system

Danger
CO build-up as a result of incorrect burner
adjustment or flue gas system leakage can have
serious health implications.
Always carry out a CO test before and after
work on gas appliances.
12
3. Start the burner.
".
–
4. Measure the CO
adjust: See page 16.
Natural gas LL
5 turns
7 turns
content in the flue gas and
2
Natural gas E
4 turns
6 turns
■ Vitotronic control unit operating instructions
and service instructions
■ Neutralising system operating instructions
■ Flue system installation instructions