Idiomas disponibles
Idiomas disponibles
PRESSURE LOSS
The gas train pressure loss ∆p is provided from the
diagram; the scales of the volumetric output
valid respectively for:
a = air,
n = natural gas (G20),
p = propane (G30),
c = city gas (G140), only for applications not covered
by the Gas Appliances Directive (90/396/EEC).
The value, provided from the diagram, can be differ-
ent according to the pressure stabilizer adjustment.
The minimum necessary pressure in the network
can be obtained by adding the pressure of the dia-
gram to the burner pressure losses (see the burner
technical instruction) and the back pressure of the
combustion chamber (see the technical instruction
of the heat generator).
FILTER MAINTENANCE
If necessary the filter can be replaced; for this
operation you must call the service agent.
PRESSURE STABILIZER ADJUSTMENT (5)
With the clockwise rotation, there is an output pres-
sure increase; with the anticlockwise there is a pres-
sure reduction.
VALVE ADJUSTMENTS
The output of slow ignition (opening phase of the
valve) is adjusted by turning the screw (3) anticlock-
wise in order to increase the output and clockwise
to decrease it.
You can adjust the starting gas quantity up to 80%
than the main output.
The main output is reached progressively, starting
from the ignition output. You can have it by turning
the screw (4) anticlockwise in order to have an
increase and clockwise to decrease the output.
LOW GAS PRESSURE SWITCH ADJUST-
MENT
Adjust the gas pressure switch (6) after carrying out
all the other adjustments of the burner with the gas
pressure switch adjusted at the beginning of the
scale.
Let the burner work at the required output.
Close slowly the gate valve until the pressure,
measured on the gas pressure switch gauge, comes
down of 5 - 6 mbar with regard to the working value.
Rotate slowly the gas pressure switch handle until
the operation of the same gas pressure switch and
the resultant burner shut-down.
Open completely the gate valve.
WIRING SCHEME,
2649
(see fig. 3)
Fig. 2
V °
are
Fig. 3
Black "P"
socket
2
GB
D4061
Black
socket
Brown
D4060
