16
30
35
40
45
50
55
60
70
65
75
kW
3
4
5
6
3,5
4,5
5,5
kg/h
2,5
3,0
3,5
4,0
4,5
5,0
5,5
Combustion heat rating
Guide values for fan pressure into the mixing head
For the first commissioning the burner is set as per the
setting values given in the diagrams, the given guide
values for the fan pressure into the mixing head will result,
depending on the combustion chamber resistance of the
appliance.
Pressure guide values into the mixing head
Pr
essur
e [mbar]
Danger of explosion!
CO build-up due to incorrect setting of the
burner. Check CO levels and carry out a
smoke number test.
When there is a CO increase or smoke,
optimise combustion. CO should not exceed
50 ppm. Smoke number < 1.
Danger of getting burned
Some burner parts (e.g. flame tube, burner
flange, etc.) become hot during burner
operation and should be allowed to cool prior
to service work being carried out.
DANGER
DANGER
Full load
Partial load
Commissioning
❏
The air damper and diffuser must be preset in
accordance with the required combustion heat rating.
❏
There must be a demand for heat from the appliance.
Note:
If during commissioning, a re-adjustment to
the air damper is required to a lower position,
the specific setting point has to be reset, i.e.
the new air damper setting for full load must
be carried out with the burner in partial load,
and then driven up to the new setting point.
Procedure
1. Unplug 4 pole connection plug and replace with plug
switch (order No. 130 103 1501/2).
2. Establish a power supply to the burner.
Mains and safety switch ON.
Burner starts according to its sequence of operation
(see Ch. 5.5).
3. Pre-set pump pressure for partial load during prepurge
with the pressure regulating screw (see Ch. 3.2).
4. Start full load via switch plug and set pump pressure
for full load with pressure regulating screw. Carry out
combustion test (see appendix), and, whilst observing
the pump pressure, optimise combustion by adjusting
the air damper setting (ST2) or the diffuser setting.
5. Start partial load, check preset pump pressure and
adjust if necessary.
Carry out combustion test and optimise combustion
with the air damper setting (ST1) observing the fan
pressure.
If the diffuser setting has to be adjusted, steps 4 and 5
will have to be repeated.
Optimising combustion
•
Increase air pressure and mixing rate:
☞
Turn the diffuser setting screw to the left (-)
Diffuser to head gap is decreased.
☞
As the excess air is reduced, increase the air
damper opening angle.
Possibilities for improving stability
•
Reduce mixing pressure at the diffuser:
☞
Turn the diffuser setting screw to the right (+).
Diffuser gap is increased.
☞
As the excess air is increased, decrease the air
damper opening angle.
•
Fit the next smaller size of nozzle and increase the
pump pressure.
•
Change nozzle manufacture.
Note
After every alteration, recheck the combustion
figures and adjust settings as necessary (see
Appendix).
Final tasks
Pressure measuring devices such as
manometers and gauges can be damaged by
continuous use, causing an uncontrolled oil
leak.
After setting the burner, remove pressure-
measuring equipment. Close connection
points.
☞
Measure and record monitoring current
☞
Record flue gas measurements on the commissioning
sheet.
☞
Visually check the installation for soundness, and oil
lines for leaks.
☞
Mount burner cover on burner.
☞
Advise operator on use of the equipment.
DANGER
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
☞
Isolate the burner from the power supply.
☞
Close all fuel cut-off devices.
5·5
5·0
4·5
4·0
3·5
3·5
4·5
5·5
3·0
2·5