Installation and operating instruction
Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact
7 Commissioning
83309302 1/2018-05 La
103-196
7.1.1 Check soundness of gas valve train
Carry out soundness test:
prior to commissioning,
after all service and maintenance work.
Switch off system using switch S1 [ch. 5.7].
Close gas isolating valve.
Remove front panel.
Open screw on test point Pe
1
of gas combi valve.
Connect test equipment.
Generate test pressure of 100 … 150 mbar.
Wait 5 minutes for pressure equalisation.
Read pressure.
Wait for the test period of 5 minutes.
Read pressure and check pressure loss.
The gas section is sound, if the pressure does not drop by more than 1 mbar.
Close screw
1
(torque 2 Nm).
1
DANGER
Risk of explosion due to leaking gas
Improper service work can lead to escaping gas and explosion.
After working on the gas combi valve, close the screw at the measuring point
and check for leaks.
Check soundness of measuring point.
Document result of the soundness test on the engineers report.