02/2009 - Art. Nr. 4200 1015 7800A
22
Start up
Air regulation
Oil pressure regulation
Operating check
1
Negative pressure gauge
connection
2
Oil pressure regulator
5
Pressure connection
6
Pressure gauge connection (oil
pressure)
7 Fuel-oil
solenoid
valve
8
Filter
R
Return connection
S
Suction intake connection
Oil pressure regulation
The fuel-oil pressure, and therefore the
burner output, is adjusted at fuel-oil
pressure regulator
2
in the pump.
Turn
- clockwise: to increase pressure
- anti-clockwise: to reduce pressure
Connect a pressure gauge at point
6
(with R1/8" thread).
Checking negative pressure
The vacuum meter for checking
negative pressure must be connected to
point
1
, R1/8". Maximum permissible
negative pressure is 0.4 bar. At higher
negative pressures, the fuel oil gasifies,
which causes scraping noises in the
pump and ultimately leads to pump
damage.
Cleaning the pump filter
• The filter is located underneath screw
connection
8
. Unscrew the filter for
cleaning.
N.B.
• Check the O-ring seal and replace if
necessary.
Operating check
Flame monitoring must be checked for
safety as part of initial commissioning
and also after servicing or if the system
has been out of operation for any
significant period of time.
- Starting attempt with flame monitor
unlit: The automatic combustion
control unit must switch to malfunction
at the end of the safety time.
- Start with flame monitor lit: The
automatic combustion control unit
must switch to malfunction after 10
seconds of preventilation
- Normal start; flame monitor goes out
when burner in operation: The
automatic combustion control unit
must switch to malfunction after the
restart and end of the safety time
The air intake adjuster
6
is set at the
factory to 1.
Position 1 = max. blower pressure
Position 5 = min. blower pressure
In cases where a high blower pressure
proves a disadvantage, e.g. great
negative pressure in the combustion
chamber, the pressure can be reduced
by adjusting the air intake adjuster:
• Loosen adjustment screw
7
• Set air intake adjuster to the new value
• Tighten the screw again.
