Weishaupt WTC 45-A, Installation And Operating Instructions Manual, Page: 32 / 90

32
5
5.5.1 Gas inlet pressure at nominal load
Pressure measuring device at test nipple Pe
The correct gas inlet pressure is a prerequisite for the
following measurements.
☞
Open gas isolating valve.
☞
Remove boiler cover.
☞
Open closing screw
1
on test point Pe by approx.
1 rotation.
☞
Connect hose from pressure measuring device.
☞
Close closing screw once measurement has been
taken.
Note: The gas inlet pressure across the whole
ratings range must lie within the values
stipulated.
• Natural Gas 17...30 mbar
• LPG 25...57.5 mbar
Gas inlet pressure
1
Soundness test of flue gas system
For room air independent operation, a soundness test of
the flue gas system via an O
2
measurement within the
internal space of the condensing boiler is required.
☞
Fit hose
4
through the test point in the supply air
aperture
2
into the condensing boiler.
☞
Seal test point in the supply air aperture
2
.
☞
Connect test sensor
5
to the hose
4
.
☞
Close cover of condensing boiler.
☞
Start condensing boiler in chimney sweep mode
and carry out O
2
measurement at 100% load.
The test should last at least 5 minutes, the O
2
content
must not fall more than 0.2% below the measured
value of the ambient air.
Soundness test of flue gas system
1
Boiler connection piece (Accessory No. 480 000 06 53 7)
2
Test point in supply air aperture
3
Flue gas test point
4
Hose
5
Test sensor
1
2
3
4
5