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Commissioning
General information regarding the fuel-oil system
Fuel-oil connection
Hoses are used to make a connection to
the fuel-oil tubes or the gate valves. To
prevent kinks and therefore any risk of
rupture, the hoses must be fed correctly
(no tension or distortion). When
installing the fuel-oil tubes, care must be
taken to ensure that the lines terminate
as close to the burner as possible and
that they are positioned in such a way
that the boiler door and the burner can
be swivelled out without obstruction.
Shut-off valve
In the fuel supply feed line, manual shut-
off valves must be fitted before the
burner (supply line and return). These
must be installed in such a way that they
are easily accessible. The manual shut-
off valves are not included in the scope
of delivery.
Gas and air separators
Air or gas In the fuel supply line could
cause noise and operational problems.
In order to avoid this, a suitable gas air
separator must be fitted in the fuel
supply line.
Fuel-oil filter
To protect the oil pressure pump and the
hydraulic system, a filter must be
installed upstream of the pump. A filter
with ≤ 250 µm is recommended.
Installation options
• Two-line installation (separate supply
line and return line with no delivery
pump)
• Ring line system (with delivery pump
and gas-air separator)
Fuel-oil pressure regulator (supply
line)
The supply pressure is regulated by the
pressure regulator fitted in the pump
and, depending on the burner output
and make of nozzle, it is set to 25-30 bar.
The pressure regulator is actuated by
rotating screw 3. Before commissioning,
the pump must be filled with fuel-oil.
Oil hoses for burner connection
Length
Burner type
DN
[mm]
N6/EKEVO 6.2400 20
1500
N6/EKEVO 6.2900 20
1500
N7/EKEVO 7.3600 20
1500
N7/EKEVO 7.4500 20
1500
N8/EKEVO 8.5800 20
1500
N8/EKEVO 8.7100 20
1500
N9/EKEVO 9.8700 20
1500
N9/EKEVO 9.10400 25
1500
32
Venting
With the ring line, if any, in operation,
open the supply line and return gate
valves. Reduce the oil pressure on the
pressure regulation valve. Switch on the
pump by depressing the contactor.
Check whether the direction of rotation
is correct, the pump is supplying fuel-oil
and the fuel-oil hydraulics system is
leak-proof. Vent the pump, e.g. at the
pressure gauge connector. When
commissioning the burner, the oil
pressure must be increased slowly until
it reaches the operating value.
Pressure regulation (fuel-oil intake
pressure)
The maximum possible vacuum is
0.2 bar. If the vacuum pressure is
greater than this, gas emissions are
produced from the fuel-oil and this could
cause problems.
In the case of ring line operation, the oil
pressure at the pump must not exceed
the maximum permissible pressure. For
the maximum pressure, please refer to
the technical data.
Connecting test devices
Before setting the burner, test pressure
gauges must be fitted to determine
supply pressure 1 and possibly intake
pressure 2.
Note:
When commissioning is complete, the
pressure gauges must be removed and
the connections must be duly sealed. If
the pressure gauges are left on the
burner, they must all be shut off with
shut-off valves.
Connection to the test point
Minimum
Connection
bending
on both
radii R
sides
[mm]
R 1/2"
145
N6/EKEVO 6.2400 G1/4
R 1/2"
145
N6/EKEVO 6.2900 G1/4
R 3/4"
145
N7/EKEVO 7.3600 G1/4
R 3/4"
145
N7/EKEVO 7.4500 G1/4
R 3/4"
145
N8/EKEVO 8.5800 G1/8
R 3/4"
145
N8/EKEVO 8.7100 G1/8
R 3/4"
145
N9/EKEVO 9.8700 G1/8
R 1"
165
N9/EKEVO
*In order to be able to use the test point, a cutting ring that conforms with DIN EN ISO
8434-1 is required. If the pressure gauge is not left on the burner, a union nut in acc. with
DIN EN ISO 8434-1 is also required.
03/2016 - Art. Nr. 4200 1044 8002A
Test
Test point
point for
for pump
Burner
intake
pressure
pressure
(at pump)
G1/4
G1/4
G1/4
G1/4
G1/8
G1/8
G1/8
G1/4
G1/4
9.10400
N6/N7
N8/N9
EKEVO 6... 7
Test point for pump pressure (bef. 1st safety
valve)
Ø10 pipe connector acc. to DIN EN ISO 8434-1*
Ø10 pipe connector acc. to DIN EN ISO 8434-1*
Ø10 pipe connector acc. to DIN EN ISO 8434-1*
Ø10 pipe connector acc. to DIN EN ISO 8434-1*
Ø10 pipe connector acc. to DIN EN ISO 8434-1*
Ø10 pipe connector acc. to DIN EN ISO 8434-1*
Ø10 pipe connector acc. to DIN EN ISO 8434-1*
Ø10 pipe connector acc. to DIN EN ISO 8434-1*
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