12
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420010830000
Start up
- Adjusting burner output
!
Risk of air blast!
Continuously check CO, CO2 and soot emissions when adjusting the output of the burner. Optimise combustion values in the
event of CO formation. CO must not exceed 50 ppm.
NB: burner regulation must always be
carried out using the combustion analy-
sis tool.
”PAB” VERSION GAS BURNERS GAS
TRAIN INSTALLATION AND SETTING
INSTRUCTIONS
Fix the gas train to burner body by means
of the 4 screws of the flange, pay attention
to set correctly the gasket ( O-ring ).
Connect electrically the gas train with the
6 pole plug.
Switch on the burner (it has already been
tested in the factory, so it is pre set on ave-
rage values) and verify the tightness of
gas train connections made during installa-
tion. Act as follows to adapt the burner out-
put to the boiler.
HIGH FLAME
1. Bring the burner in high flame , air inlet
must be set at 75 ° (maximum opening po-
sition). To adjust air capacity operate on
the combustion head position.
Just in peculiar case it is necessary to re-
duce the air flow in high flame closing air
intake damper.
2. The position of gas butterfly valve must
be lower then 90° ( typically 85°. It is im-
portant not get over 90° to obtain a per-
fect combustion during passage from high
to low flame). Eventually adjust this posi-
tion acting on the screw “1 “, after loose-
ning nut “ 2 “.
3. Regulate gas capacity in high flame
through the gas governor, or operate on
the adjustable gas valve.
LOW FLAME
4. Choose the first stage position on the
servocontrol ( normally between 10° - 30°)
on the basis of the reduced charge output
required and switch the burner to low
flame.
5. Regulate gas capacity, to obtain optimal
combustion.
(Blu 1700.1-2000.1) changing the position
of the throttle valve, act on hexagonal bar “
5 “, after loosen nut “ 6 “.
N.B.
observe the minimum required
flue gas temperature specified by the
boiler manufacturer and the requirements
demanded of flue gas ducts for avoiding
condensation.
Adjustment of gas solenoid valve
Refer to the gas train manual for the gas
setting of the gas train selected.
Final operations
6. Bring the burner in high flame again, if
necessary adjust again gas flow (as shown
in point n.2).
7. If necessary repeat operations descri-
bed on point n. 5 and n. 6 until You obtain
the exact position of the gas flow both in
high and low flame.
8. Fix the nuts.
Firing head setting (C).
The firing head position adjustment is made
in order to obtain the best combustion effi-
ciency. When used with minimum outputs
the firing head is adjusted in rear position.
With high output, the firing head is adjusted
in forward position. Adjustment:
• loosen screw
V
through a suitable Allen
key.
• by a screwdriver act on the hex. head
screw
U
until is reached the desired posi-
tion.
• tighten screw
V
.
Servomotor SQN 30 151A2700
Remove cover to gain access to the adju-
sting cams.The cams are to be adjusted
through the suitable key provided for. De-
scription:
I - Limit switch for air damper “High
Flame” position adjustment (Max.
power).
II - Limit switch for the air damper
position at burner’s shut down.
III- Limit switch for air damper
“Low Flame” position adjustment
(Min. power).
V- Limit switch not used.
(5): MANUAL RELEASE SWITCH
C
–
+
B
A
V
U
2
1
A
5
1
2
6
5
6
B
