20
Concluding work
1. Record test results of the flue gas test on the
inspection card.
2. Fit burner cover.
3. Advise operator on use of equipment.
Set air pressure switch
Factory pre-set: 3.5 mbar
The switch point must be checked and adjusted during
commissioning.
For this a differential pressure measurement between
points ➀ and ➁ is required.
1. Install manometer as shown in the picture.
2. Start the burner.
3. Drive through the setting range of the burner, observing
pressure behaviour at manometer.
4. Determine the lowest differential pressure value.
5. Set 80% of the lowest differential pressure at the
setting adjuster dial.
Example:
Lowest differential pressure: ________________ 3·2 mbar
Switch point air pressure switch: ___ 3·2 x 0·8 = 2·6 mbar
Note Installation dependant influences on the air
pressure switch, such as flue gas system, heat
exchanger, installation or air supply, the
settings may result in adjustments having to be
made.
Differential pressure test
5.4 Shutdown periods
For short breaks in operation
(e.g. flue cleaning etc.):
☞ Isolate the burner from the power supply.
During longer shutdown periods
1. Isolate the burner from the power supply.
2. Close all fuel shut off devices.
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