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2
INSTALLATION
2.1
BOILER ROOM
The. boilers. with. a. rating. of. more.
than. 35. kW. must. be. equipped. with.
a.technical.room.whose.dimensions.
and.requirements.correspond.to.the.
current.standards.and.regulations..
The.minimum.distance.between.the.
walls. of. the. room. and. the. boiler.
must.not.be.less.than.0.60.m.,.while.
the. minimum. height. between. the.
top. of. the. boiler. and. the. ceiling.
must.be. at. least. 1. m.. which. can.be.
reduced. to. 0.50. m.. for. boilers. with.
incorporated. heaters. (however. the.
minimum. height. of. the. boiler. room.
must. not. be. less. than. 2,5. m).. The.
boilers.with.a.rating.of.less.than.35.
kW.can.be.installed.only.in.perfectly.
air-vented.rooms..
To.circulate.air.in.the.room,.air.vents.
must. be. made. on. the. outside. walls.
which. satisfy. the. following. require-
ments:
–..Have. a. total. surface. area. of. at.
least.6.cm
2
.for.each.installed.Kw.
of. thermal. capacity. and. however.
not.less.than.100.cm
2
.
–..To.be.situated.as.close.as.possible.
to. the. floor,. unobstructable. and.
protected. by. a. grate. which. does.
not.reduce.the.air.passage.area.
2.2
CONNECTING UP SYSTEM
Before. proceeding. to. connect. up.
the.boiler,.you.are.recommended.to.
make.the.water.circulate.in.the.pip-
ing.in.order.to.eliminate.any.foreign.
bodies.that.might.be.detrimental.to.
the.operating.efficiency.of.the.appli-
ance..
For. connecting. up. the. pipes,. make.
sure. to. follow. the. indications. illus-
trated.in.fig..1..
The. connections. should. be. easy. to.
disconnect. using. pipe. unions. with.
orientable.connections..
The shutoff valve must be connect-
ed to a suitable flow system and
return pipes.
2.2.1 System filling (fig. 4)
The. boiler. and. the. relative. sys-
tem. must. be. filled. operating. on.
the. bearing. tap. and. the. pressure.
of. cold. charging. the. system. must.
be. included. between. 1-1.2 bar (98-
117.6 kPa)..
During.filling.the.main.switch.should.
be. left. open.. Filling. must. be. done.
slowly.so.as.to.allow.any.air.bubbles.
to. be. bled. off. through. the. provided.
air.vents..
This.operation.can.be.made.easy.by.
positioning. horizontally. the. incision.
of. the. block. screw. of. the. shutoff.
valve.. . Upon. completing. the. filling,.
put. the. screw. back. to. its. original.
position..
At. the. end. of. the. operation. make.
sure.that.the.tap.is.closed.(fig..4).
2.2.2 D.H.W. production
In.order.that.the.boiler.be.capable.of.
supplying.treated.water,.all.the.air.in.
the.boiler's.serpentine.must.be.bled.
off.at.the.first.ignition..
This.operation.is.made.easy.by.posi-
tioning. horizontally. the. incision. of.
the.block.screw.of.the.shutoff.valve.
(5. fig.. 2-2/a).. After. all. the. air. has.
been.bled.off,.put.the.screw.back.to.
its.original.position.
2.2.3 Characteristics
of feedwater
To.prevent.lime.scale.and.damage.to.
the. tap. water. exchanger,. the. water.
supplied. should. have. a. hardness. of.
no.more.than.20°F..
In. all. cases. the. water. used. should.
be. tested. and. adequate. treatment.
devices.should.be.installed..
To.prevent.lime.scale.or.deposits.on.
the. primary. exchanger,. the. water.
used. to. supply. the. heating. circuit.
should.must.be.treated.in.accordan-
ce.with.UNI-CTI.8065.standards..It.is.
absolutely. essential. that. the. water.
is. to. be. treated. in. the. following.
cases:
–. Very.extensive.systems.(with.high.
contents.of.feedwater).
–. Frequent. addition. of. makeup.
water.into.the.system.
–. In.case.it.is.necessary.to.empty.the.
system.either.partially.or.totally.
2.3
SMOKE EXHAUST
2.3.1 Connecting up flue
(type B)
The. flue. is. of. fundamental. impor-
tance. for. the. proper. operation. of.
the.boiler;.if.not.installed.in.compli-
ance.with.the.standards,.starting.the.
boiler.will.be.difficult.and.there.will.
be. a. consequent. formation. of. soot,.
condensation.and.encrustation..
A.flue.therefore.must.satisfy.the.fol-
lowing.requirements:
–. be. constructed. with. waterproof.
materials. and. resistant. to. smoke.
temperature.and.condensate;
–. be. of. adequate. mechanical. resil-
ience.and.of.low.heat.conductivity;
–. be. perfectly. sealed. to. prevent.
cooling.of.the.flue.itself:
–. be.as.vertical.as.possible;.the.ter-
minal. section. of. the. flue. must. be.
fitted.with.a.static.exhaust.device.
that. ensures. constant. and. effi-
cient. extraction. of. products. gen-
erated.by.combustion;
–. to.prevent.the.wind.from.creating.
pressure.zones.around.the.chim-
ney. top. greater. than. the. uplift.
force. of. combustion. gases,. the.
exhaust. outlet. should. be. at. least.
0.4.m.higher.than.structures.adja-
cent. to. the. stack. (including. the.
roof.top).within.8.m;
–. have. a. diameter. that. is. not. infe-
rior. to. that. of. the. boiler. union:.
square. or. rectangular-section.
flues.should.have.an.internal.sec-
tion. 10%. greater. than. that. of. the.
boiler.union;
–. the.useful.section.of.the.flue.must.
conform.to.the.following.formula:
. .
.
.
P
. S. =. K
. .
.
.
√H
. S. resulting..section.in.cm
. K. reduction.coefficient.for.liquid.
fuels:.0.024
. P. boiler.input.in.Kcal/h
. H. height. of. the. flue. in. meters.
measured. from. the. flame.
axis. to. the. flue. outlet. into. the.
atmosphere.. When. . dimen-
sioning. the. flue,. the. effective.
height. of. the. flue. in. meters.
must. be. considered,. meas-
ured.from.the.flame.axis.to.the.
top.of.the.flue,.reduced.by:
. .
–. 0.50.m.for.each.change.of.di-
rection.of.the.connection.un-
ion.between.boiler.and.flue;
. .
–. 1.00.for.each.horizontal.me-
tre.of.the.union.itself.
Our. boilers. are. the. B
. type. and. do.
23
not.need.any.particular.connections.
other. than. the. one. to. the. flue. as.
described.above.
2.4
FUEL ADDUCTION
(figs. 7 - 7/a)
The.fuel.can.be.fed.into.the.thermal.
group. sideways,. the. ducts. must. be.
passed.through.the.aperture.on.the.
2
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