Sime Aqua Serie Instrucciones Para El Instalador página 73

correct. as. indicated. in. the. instruc-
tions.supplied.with.the.accessories.
2.4 FUEL ADDUCTION
The.fuel.can.be.fed.into.the.thermal.
group. sideways,. the. ducts. must. be.
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. but-
ton."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.cali-
brated. at. the. factory;. it. is. recom-
mended,. however,. that. the. settings.
listed. under. point. 1.3. be. checked,.
with.reference.to.atmospheric.pres-
sure.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..
Remove.the.shell.door.to.access.the.
burner.unit's.controls.
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 bringing 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.
2.5.1 Air lock adjustment
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.
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)
unit.are.given.in.point.1.3.
2.5.2 Pump pressure adjustment
To.adjust.gas-oil.pressure,.turn.the.
screw.(3.fig..8/a).and.check.pressure.
. 100
. 100
. 100
. 90
. 70
. 30
. 20
Fig..7
1
2
3
4
5
Fig..7/a
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