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
114-196
19. Set type of gas
Check type of gas, if required change type of gas.
Commissioning wizard WTC
Natural Gas
Check screw on gas combi valve.
Position 1
Rotate 90° anticlockwise
10.6.7
Setting type of gas
20. Start calibration
DANGER
Risk of electric shock
Touching the ignition device can lead to electric shock.
Do not touch ignition device during the ignition process.
Select
and confirm.
Press dial knob.
Selected area is highlighted in blue.
Set
Calibration
to
On
and confirm.
The condensing unit carries out a calibration and determines the basic Io value
for the combustion control (system SCOT®).
Following successful calibration the
flue gas measurement P max
starts.
Commissioning wizard WTC
Current capacity
Boiler temperature
51 °C
64 %
Calibration
On
SCOT base value
80
Calibration running
Commissioning wizard WTC
Current capacity
Boiler temperature
23 °C
0 %
Calibration
On
SCOT base value
80
OK = press | ESC = press 3 secs.
Commissioning wizard WTC
Current capacity
Boiler temperature
23 °C
0 %
Calibration
Off
SCOT base value
80
21. Check gas connection pressure
Open screw on test point Pe of gas combi valve [ch. 7.1.1].
Connect pressure measuring device.
Check gas connection pressure
The gas connection pressure must be within the range.
Natural Gas E/H
17.0 …
20
… 25.0 mbar
Natural Gas LL
20.0 …
25
… 30.0 mbar
LPG B/P (p
n
37)
25.0 …
37
… 45.0 mbar
LPG B/P (p
n
50)
42.5 …
50
… 57.5 mbar
Operation outside the ranges according to EN 437 is not permitted.
If the measured connection pressure lies outside of the range:
Do not start plant.
Inform the gas supplier.
If necessary install additional gas pressure regulator.