29
EN
Reading sample:
Given:
Flow rate 4 litres/hour, suction height 1 metre
Searched: Most possible unrolled length of suction pipe
Solution:
From diagram
14 metres
+ = Height of admission; − = Height of suction
Notice:
If the dimensions of the pipe are not sufficient for a suction operation (i.e.
the suction pipe is longer than indicated in the pipe dimensions diagram),
you should use a booster pump. Make sure that the oil pipe will not be in-
creased.
Applicable for:
Extra Light heating oil, up to 700 metres MSL; maximum
length of pipe: 30 metres
The diagram includes:
1 filter, 1 check valve, 6 bends at 90°, 40 mbar
De-airing of the oil supply system
For de-airing of the oil supply system we recommend the connection of a
suction pump on the low pressure- measuring branch of the oil pump.
With a low quantity of air within the oil supply you may abstain from de-
airing through an external suction pump. Instead, the burner should be
switched ON (with a slightly opened screwed sealing plug of the pressure
measuring branch) until de-aired and foam-free oil emerges. In order to
avoid pollution by an undefined oil leakage we recommend the use of a
special venting fitting (see Chapter 10.3). Should, however, no flame be
formed after expiry of the start sequence this procedure must be repeated
by eliminating interference to the firing unit. In order to prevent overload
of the ignition unit, as well as damaging the pump caused by trapping of
air, you should eliminate the interference a maximum of three times in suc-
cession. If a complete de-airing of the oil supply has still not occurred we
recommend the use of an external suction pump for the de-airing.
[l/h]
20
18
16
14
12
10
9
8
7
6
5
4,5
4
3,5
3
2,5
2
1,8
1,6
1,4
1,2
1
6 7 8 9 10
12
14
16 18 20
25 30 40
50 60 [m]
[m/s]
0,442
0,398
0,354
0,310
0,243
0,221
0,199
0,177
0,155
0,133
0,111
0,100
0,088
0,077
0,066
0,055
0,044
0,039
0,035
0,030
0,026
0,022
+4 m
+3 m
+2 m
+1 m
+/-0m
–1 m
–2 m
–3 m
–4 m
Unrolled length of suction pipe
Diagram of dimensions for suction pipes, dimension Ø 4/6 mm
Range of application: 1-10 liters/h, oil temperature: > 10 °C (indoor tank)
[l/h]
20
18
16
14
12
10
9
8
7
6
5
4,5
4
3,5
3
2,5
2
1,8
1,6
1,4
1,2
1
6 7 8 9 10
12
14
16 18 20
25 30 40
50 60 [m]
[m/s]
0,442
0,398
0,354
0,310
0,243
0,221
0,199
0,177
0,155
0,133
0,111
0,100
0,088
0,077
0,066
0,055
0,044
0,039
0,035
0,030
0,026
0,022
+4 m
+3 m
+2 m
+1 m
+/-0m
–1 m
–3 m
–4 m
Unrolled length of suction pipe
Diagram of dimensions for suction pipes, dimension Ø 4/6 mm
Range of application: 1-10 liters/h, oil temperature: 0-10 °C (outdoor tank)
–2 m
3.6 Oil connection on the burner
The oil hoses that are mounted on the pump can be led out of the burner
model with cover optinally from the left or right side of the base plate.
For this purpose, the oil hoses have to be insert in a rubber grommet that
is insert into the recess of he base plate. The recess of the base plate that
is not used is respectively sealed by using a rubber grommet without a
hole (closed grommet). The factory finishing of covered burners guides
the hoses across the right side recess of the base plate.
The hose connection on the side of the oil supply is carried out as a 3/8"
connecting nut with conical nipple.
Oil hose routing
Attention:
Before commissioning the burner the plugs on the oil hoses must be
removed. When connecting the oil hoses with the oil supply you must
observe the arrow symbol for the flow direction at the connection end of
the oil hoses.
3.7 General inspections
Before commissioning the burner the following inspections must be
carried out:
– Is mains voltage available?
– Is the oil supply ensured?
– Have the plugs been removed from the oil hoses?
– Are the oil hoses connected properly (feed/return)?
– Is the supply of combustion air ensured?
– Has the burner been correctly installed and is the boiler door properly
locked?
– Is the boiler filled with water?
– Is the boiler and the exhaust circulation tight-fitting?
3.8 Burner adjustment
Each burner has been factory adjusted in accordance with the basic set-
ting table. Upon initial start-up of the burner this basic setting must be
adapted to the local conditions. In addition, you should also bear in mind
that the given pressure of the injected oil mass flow is subject to heavy
tolerances. Therefore the determination of the CO
2
content, as well as the
soot number, is absolutely essential at the initial start-up of the burner.
We would therefore recommend to run the burner with a CO
2
contend in
the range of 12.5%-13.5%. Make sure not to exceed the soot number of
Rz=0.5 when operating the burner.
Adjustment of the combustion airflow
The combustion airflow results from the selected air nozzle, the distance
between the oil nozzle and the air nozzle front edge, as well as the ad-
justment of the air throttle.
Diameter of air nozzle and distance between air nozzle and oil nozzle
The effective cross-section of flow for the combustion air results from the
diameter of the air nozzle and the distance between the air nozzle and the
oil nozzle. The diameter of the air nozzle has been embossed on its outer
jacket, or it may also be established by means of a vernier caliper. The
gap between the air nozzle and the oil nozzle may be established by me-
ans of a Vernier depth gauge, or by means of a setting gauge that has
been offered as an accessory (see Chapter 10). As an alternative to this
adjustment method distance rings are used which are pushed onto the
oil pre-heater and determine, as a mechanical stop, the gap between the
air nozzle and the oil nozzle. The basic setting table (see Chapter 5) pro-
vides the reference values for the diameter of the air nozzle, the thickness
of the distance rings, and the resulting air and oil nozzle gap.
