Installation and operating instruction
Oil burner WL40/1-A Z-1LN-A
12 Project planning
83319702 1/2020-10 La
94-116
12 Project planning
12.1 Oil supply
Observe EN 12514-2, DIN 4755, TRÖI and local regulations.
General information relating to the oil supply
Do not use cathode protection system with steel tanks.
With oil temperatures < 5 °C, the separation of paraffin can cause oil lines, oil fil-
ters and nozzles to become blocked. Avoid placing oil tanks and pipelines in
areas subject to frost.
The oil supply should be installed in such a way that the oil hoses can be con-
nected free of tension.
Fit oil filter in front of pump, recommended mesh aperture 70 μm.
Suction resistance and supply pressure
!
NOTICE
Pump damage due to excessive suction resistance
A suction resistance greater than 0.4 bar can damage the pump.
Reduce suction resistance – or – install oil supply pump or suction unit, whilst
observing the maximum supply pressure at the oil filter.
The suction resistance depends on:
suction line length and diameter,
pressure loss of oil filter and other components,
lowest oil level in the oil storage tank (max 3.5 m below the oil pump).
If an oil feeder pump is installed:
max 1.5 bar supply pressure at oil filter,
max 0.7 bar supply pressure into automatic de-aerator.
Elevated oil level
If the suction line is leaking the tank can be siphoned dry. An electric anti siphon
valve
1
can prevent this.
Observe manufacturers instructions regarding pressure loss caused by anti si-
phon valve.
The anti siphon valve must close with a delay and show a pressure relief towards
the oil storage tank.
Maintain height differences:
max 4.6 m between oil level and anti siphon valve,
on single pipe system max 8 m between anti siphon valve and automatic de-aer-
ator,
on two pipe system max 20 m between anti siphon valve and oil pump.
max 8 m
max 4.6 m
max 20 m
max 4.6 m
1
1
