Weishaupt WG20 1-C Z-LN Series - Purging the Gas Valve Train

Installation and operating instruction
Gas burner WG20…/1-C Z-LN
7 Commissioning
83054602 1/2020-01 La
37-96
7.1.4 Purging the gas valve train
Open test point into valve 1 [ch.7.1.3].
Connect an approved vent hose to the test point.
Vent hose must lead to atmosphere.
Slowly open gas isolating valve.
The gas/air mixture in the valve train vents via the hose to safe atmosphere.
Close gas isolating valve.
Remove vent hose and immediately close test point.
Use a test burner to ensure no air is present in the valve train.