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
104-196
7.1.2 Check gas connection pressure
DANGER
Risk of explosion due to excess gas supply pressure
Exceeding the maximum connection pressure can damage the gas valve train and
lead to an explosion.
Check gas connection pressure
Open screw on test point Pe of gas combi valve [ch. 7.1.1].
Connect pressure measuring device.
Slowly open isolating valve whilst observing the pressure increase.
If the connection pressure exceeds 60 mbar:
Immediately close isolating valve.
Do not start plant.
Inform the gas supplier.
If necessary install gas pressure regulator.
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.
Close screw on measuring point Pe (torque 2 Nm).
Check soundness of measuring point.
7.1.3 Set type of gas on gas combi valve
The gas combi valve is factory reset to Natural Gas.
If the appliance is operated with liquid petroleum gas, it is necessary to switch to
LPG at the gas combination valve:
Turn screw (Allen screw 2.5)
1
90° clockwise to position 2.
Natural Gas
Position 1
LPG
Position 2
1
If the type of gas is changed, the parameter for the type of gas must also be adjus-
ted.