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. cur-
rent.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.ther-
mal. capacity. and. however. not. less.
than.100.cm
2
.
–..To. be. situated. as. close. as. possi-
ble.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. piping. in.
order. to. eliminate. any. foreign. bodies.
that.might.be.detrimental.to.the.oper-
ating.efficiency.of.the.appliance..
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.ori-
entable.connections..
The shutoff valve must be connected
to a suitable flow system and return
pipes.
2.2.1 System filling (fig. 4)
The. boiler. and. the. relative. system.
must.be.filled.operating.on.the.bearing.
tap.and.the.pressure.of.cold.charging.
the.system.must.be.included.between.
1 - 1.2 bar.. 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. devi-
ces.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.importance.
for.the.proper.operation.of.the.boiler;.
if.not.installed.in.compliance.with.the.
standards,. starting. the. boiler. will. be.
difficult. and. there. will. be. a. conse-
quent.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.cool-
ing.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. efficient.
extraction.of.products.generated.by.
combustion;
–. to. prevent. the. wind. from. creating.
pressure.zones.around.the.chimney.
top. greater. than. the. uplift. force.
of. combustion. gases,. the. exhaust.
outlet.should.be.at.least.0.4.m.high-
er. than. structures. adjacent. to. the.
stack.(including.the.roof.top).within.
8.m;
–. have.a.diameter.that.is.not.inferior.
to. that. of. the. boiler. union:. square.
or.rectangular-section.flues.should.
have.an.internal.section.10%.great-
er.than.that.of.the.boiler.union;
–. the. useful. section. of. the. flue. must.
conform.to.the.following.formula:
69
2
INSTALLATION
Fig..4
OPEN
0
4
1
3
2
bar
0
4
1
3
2
bar
