Viessmann Vitoflame 100 Service Instructions Manual page 22

Further details regarding the individual steps
Checking both valves of the gas train for leaks
22
Please note:
Only a function test is required for
gas trains with leak test device.
1.
2.
3.
4.
B
5.
6.
³
7.
¨ Safety instruction
Check the test nipple for gas leaks.
A
B