baltur BGN 200P Manual De Instrucciones página 56

INSTRUCTIONS FOR SETTING LANDIS & GYR
mod. SKP 10.123A27 TWO STAGE GAS VALVES
DESCRIPTION OF HOW THE VALVE
OPERATES
Servomotor
The hydraulic control system consi-
sts of a cylinder filled with oil and an
oscillating pump with thrust piston.
There is also a solenoid valve located
between the intake chamber and the
pump thrust chamber which serves
to close the valve. The piston moves
against a sealed joint inserted into the
cylinder; in turn, this joint hydraulically
separates the intake chamber from the
delivery chamber. The piston transmits
the stroke directly to the valve.
A disk is secured to the valve shaft and
can be seen through a slit in the valve,
indicating the stroke. Through an oscil-
lating system this disk simultaneously
A = Driver identification plate
B = Flow direction indicator
C = Valve body identification plate
SUGGESTIONS FOR SETTING
1) We therefore advise you to prepare the burner for ignition by setting screw
V1 (regulating the gas flow to the 1
control lever and the microswitch push-button does not exceed 1 mm (see
the figure below). Set the combustion air gate in a highly closed posi-
tion.
2) Second stage. Set V2 in the position where
the gas flow required for the 2
tained. Obviously, the position at which V2
is set (the distance between the microswitch
control lever and the microswitch push-but-
ton) must be greater than that set for V1.
activates the limit switch contacts for the
partial and nominal output positions.
Two - stage operation
When the valve receives the signal to
open, the pump cuts in and the magne-
tic valve closes. The pump transfers the
oil under the piston to above it, forcing
the piston downward, which compres-
ses the closure return spring with the
rod and plate. When the valve reaches
the first stage, a disk connected to the
shaft activates contact "V1" by means
of an oscillating system. As a result, the
pump cuts out and the valve remains in
the first-stage position.
stage) so that the distance between the
st
stage is ob-
nd
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The pump begins functioning again
only when terminal 3 is powered either
from the control panel or directly by the
power regulator. The full load stroke
terminates when the contact is tripped
and the pump cuts out.
If the power regulator cuts off power
supply to terminal 3, the magnetic
valve opens and the valve will remain
open until the piston reaches the 1
stage position. If regulation is shut
down because the power supply has
been cut off, terminals 1 and 3 are
no longer powered - this causes the
servocontrol to close the valve in less
than 1 second.
Remove cover "A" to access the gas
regulation screws.
To set gas flow to the 1
the screw in terminal I (V1) with a
screwdriver.
To set gas flow to the 2
the screw in terminal III (V2) with a
screwdriver.
In both cases, tightening the screw
increases gas flow, unscrewing it de-
creases the flow.
Screw "D" in terminal "IV" regulates the
position at which the "clean" contact
is activated. This can be used for an
outside signal.
Microswitch push-button for valve 1
Microswitch control lever for valve 1
Screw setting the opening for the valve 1
N° 8881
Rev. 06/11/90
st
flame, turn
st
flame, turn
nd
stage
st
stage
st
stage (V1)
st