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passed. through. the. aperture. on. the.
right.or.left.hand.side.of.the.shell.for.
connection.to.the.pump.(fig..7.-.7/a).
Important
–. Make. sure,. before. turning. on. the.
boiler,. that. the. return. tube. is. free..
An. excessive. counter-pressure.
would..break.the.pump.seal.
–. Make.sure.that.the.tubes.are.sealed.
–. The.maximum.depression.of.0.4.bar.
(300.mmHg).(see.Table.1).must.not.
be.exceeded..Gas.is.freed.from.the.
fuel.above.that.value.and.can.cause.
cavitation.of.the.pump.
–. It's. advisable. to. bring. the. return.
tube. in. the. depression. systems. up.
to. the. same. height. of. the. intake.
tube.. In. . this. case. the. foot. valve. is.
unnecessary..
. If. instead. the. return. tube. arrives.
above.the.fuel.level,.the.foot.valve.is.
indispensable.
Starting the pump
Turn.on.the.burner.to.start.the.pump.
and.check.the.flame.ignition..
If. a. "lock. out". occurs. before. fuel.
arrival,. wait. for. at. least. 20. seconds.
then. press. the. burner. release. button.
"RESET".and.wait.for.the.whole.start-
up.operation.to.repeat.until.the.flame.
lights.up.
2.5
BURNER ADJUSTMENTS
Each.unit.is.shipped.with.a.burner.unit.
equipped.with.a.nozzle.and.calibrated.
at. the. factory;. it. is. recommended,.
however,.that.the.settings.listed.under.
point. 1.3. be. checked,. with. reference.
to.atmospheric.pressure.at.sea.level.
If.it.is.necessary.to.adjust.the.burner.
differently. from. the. factory. settings,.
this. should. be. done. by. authorised.
personnel. following. the. instructions.
provided.below..
The burner adjustments allow opera-
tion up to an altitude of 1300 m above
sea level.
2.5.1
Air lock adjustment (fig. 8)
To. adjust. the. air. lock,. loosen. the.
screw. (1. fig.. 8). and. slide. the. gradu-
ated. scale. (2. fig.. 8). indicating. the.
position. air. lock. position.. The. values.
for. adjustment. of. each. unit. are. given.
in.point.1.3.
70
9
10
9
C
ONNECTIONS
. 1. Vacuometer.attachment
. 2. Pressure.regulator
. 3. Manometer.attachment
. 4. By-pass.screw
. 5. Back-flow.flexible.pipe.
. . (included.in.supply)
ATTENTION:
- loosen the pump joints (5-6) before pointing the flexible pipes for bring-
ing them out from the prefixed opening on the right/left hand side of the
shell. Afterwards tighten the joints to the pump.
- The pump is prearranged for the double-tube function. Remove the by-
pass screw (4) for single tube function.
2.5.2
Pump pressure
adjustment
(fig. 8/a)
To. adjust. gas-oil. pressure,. turn. the.
TABLE 1
.
H.
. L .(meters)
. m eters. øi.tube. . øi.tube
.
.
8.mm. . 10.mm
0.
35.
. 0,5.
30.
.
1.
25.
. 1,5.
20.
.
2.
15.
.
3.
8.
. 3,5.
6.
H.=. Difference.in.level
L. =. Maximum.length.
. . of.the.intake.tube
8
7
6
. 6. Suction.flexible.pipe.
. . (included.in.supply)
. 7. Auxiliary.pressure.intake
. 8. Valve
. 9. Racor.3/8".(included.in.supply)
. 1 0. Fuel.feed.line.filter.
. . (included.in.supply)
screw. (3. fig.. 8/a). and. check. pressure.
with. a. pressure. gauche. connected. to.
the. intake. (2. fig.. 8/a),. making. sure.
pressure. corresponds. to. the. value.
given.under.point.1.3.
.
100
.
100
.
100
.
90
.
70
.
30
.
20
Fig..7
1
2
3
4
5
Fig..7/a
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