172 305 68 07-01
Adjustment of gas flow
–
Before the burner starts vent
the lines to make sure that there
is gas available at the multibloc
–
Use an allen key size 2,5 mm
for adjusting N and V.
–
Connect a pressure gauge for
measuring P
Br
, (advisable to find
out if the valves are open)
–
Set the switch in position MAN.
–
Set the gas pressure switch
min. and air pressure switch on
min. adjustment. Set the gas
pressure switch max, if any, on
max. adjustment.
–
If necessary repeat the controls
of the adjustment made on min.
(N) and max. load(V).
–
The desired gas flow on min.
and max. has now been ad-
justed by changing the orange
and the red cams. Check the
gas flow on the gas meter avai
-
lable on the installation.
–
Note! Do not forget to set the air
and gas pressure switches after
the adjustment, see special
instructions.
Releasing button
By pressing the button and snap-
ping it down, the motor will be
released and the damper can easily
be turned. This function facilitates
an exchange of damper motor.
–
Start the burner, observe the
pressure gauge, if no flame is
established and the pressure
gauge needle does not flicker,
increase N. When the flame is
established adjust the gas flow
by means of the screw N. Use a
flue gas instrument.
–
Change over to max. load,
press the switch “increase”
–
Adjust the gas flow with V and
check at the same time the
combustion values.
–
Go back to min. load and check
the combustion value. Adjust if
necessary.
Damper motor, air volume
Adjust the orange cam for min. load
(about 5-10 on scale)
Adjust the red cam for max. load
(90° )
The blue cam is factory set for
closed position during standstill
The black cam has no function at
modulating operation
ADJUSTMENT OF GAS FLOW
Max. load (red)
Min. load (orange)
Closed damper (blue)
Gas valve (black)
Releasing button
N.B.
The upper position is
the standard position
