13
C
B
A
S
P
U
Fuel Pump
Cleaning the cartridge filter
Regularly clean the cartridge filter
[
B
] of the fuel pump and replace it
as necessary.
1. Turn the plug [C] with a
hexagonal wrench and take it
out of the pomp at the top.
2. Carefully pull the cartridge
filter [B] out of the plug.
3. Clean or replace the filter [B].
4. Press the filter back onto the
plug and screw both of them
back into the pump.
The standard type of the pump
runs in a system of 1 pipe.
The required fuel is sucked in
through the suction line „S“.
For the first starting and after
having emptied the fuel tank, the
fuel system is deaerated through
the burner nozzle. For this purpose
the unit is switched on. After a
possible switch off through failure,
the unit is restarted after having
released the automatic burner
relay (take care of waiting time).
If, after the 3rd start of the unit
there is another switch off through
faults, the fuel filters should be
checked to make sure that they are
free from pollutions and that they
are tight..
NOTE
Adjustment and maintenance
work may only be carried out
by authorised qualified techni-
cians.
CAUTION
An electrical safety check must
be carried out in accordance
with VDE 0701 after any work
on the units.
CAUTION
Never let the pump run
without feeding fuel for a lon-
ger period. Make sure not to
leave a unit with dry run pump
unattended for a longer time.
NOTE
Perfect fuel quality is an abso-
lute necessity for the lubrica-
tion of the pump drive.
Suction of water residues
should never take place and,
in the case of setting, suc-
tion should not take place of
warping fine dusts
(e.g. cement etc.).
NOTE
Please ensure that an adequate
fill level is maintained in the
fuel tank. Approx. 5 - 10 litres
of fuel is required.
Setting the pump pressure
The pump pressure can
only be set if a manometer
is connected to the connection [P].
The pump pressure is
changed by turning the
pressure setting screw [A].
Clockwise:
increase the pressure
Counter clockwise:
reduce the pressure
The required pump pressure is de-
termined according to the heating
capacity (please refer to unit type
plate) and to the nozzle size.
Converting to a 2-way pipe
system
In this case, an additional stopper
[T],EDP No. 1107374 must be
installed.
1. Remove stopper [U]
2. Screw in stopper [T]
3. Reinstall stopper [U]
4. Establish return flow [R]
T
U
S
R
Summary of Contents for ATK 25
Page 2: ......
