Installation and operating instruction
Oil burner WM-L20/2-A R (W-FM100/200)
12 Project planning
83252902 1/2019-09 La
63-84
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 it is possible to hinge open
the burner.
Fit oil filter in front of pump, maximum mesh aperture 100 μm.
Suction resistance and supply pressure
CAUTION
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).
Shut off devices at the burner
CAUTION
Damage caused by the shut off device closing too fast
Pressure surges and cavitation can damage the components of the oil supply.
When testing the operation of the limit switches the shut off device must only be
closed until the safety shut off responds.
The shut off device can only be closed completely when the oil pump has shut
off.
The isolating valves operate mechanically in compound and are fitted with a limit
switch, which inhibits burner operation when the isolating valves are closed.
Protect shut off devices in the return line from accidental closure.
The installation of non return valves is not permitted.