An. adhesive. data. plate. is. sticked. insi-
de. the. front. panel;. it. contains. all. the.
technical. data. identifying. the. boiler. and.
the. type. of. gas. for. which. the. boiler. is.
arranged.
2.2.1 D.H.W. tank unit “BT130 - BT150”
The.
“22 OF - 32 OF”
. versions. can. be.
matched. to. the. separate. D.H.W.. tank.
units.
“BT130-BT150”
..
The. D.H.W.. tank. . units. can. be. installed.
underneath. the. boiler. (
“BT150”
). or. on.
the. side. (“BT130”).. The. D.H.W.. sensor..
(SB).is.supplied.with.the.tank..
The. SB. must. be. connected. to. the. elec-
tronic. control. panel. of. the. boiler. as.
shown. in. fig.. 6.. To. aid. installation. an.
optional.hydraulic.connection.kit.is.avai-
lable,.code.8076104.(
“BT130”
).and.code.
8076105.(
“BT150”
)..Detailed.instructions.
on. assembling. the. kit. are. given. in. the.
packaging.
2.2.2 Filter on the gas pipe
The.gas.valve.is.supplied.ex.factory.with.
an. inlet. filter,. which,. however,. is. not.
adequate. to. entrap. all. the. impurities. in.
the.gas.or.in.gas.main.pipes..To.prevent.
malfunctioning.of.the.valve,.or.in.certain.
cases. even. to. cut. out. the. safety. device.
with. which. the. valve. is. equipped,. install.
an.adequate.filter.on.the.gas.pipe.
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.exchan-
ger,.the.water.used.to.supply.the.heating.
circuit.should.must.be.treated.in.accor-
dance.with.UNI-CTI.8065.standards.
It.is.absolutely.essential.that.the.water.is.
to.be.treated.in.the.following.cases:
–. Very.extensive.system.(with.high.con-
tents.of.feedwater).
–. Frequent. addition. of. makeup. water.
into.the.system.
–. Should. it. be. necessary. to. empty. the.
system.either.partially.or.totally.
2.4
SYSTEM FILLING
(fig..4)
The.filling.is.carried.out.at.a.boiler.tem-
perature. no. less. than. 40°C.. It. is. done.
slowly.in.order.to.allow.the.air.bubbles.to.
be.released.through..appropriate.vents..
In.order.to.facilitate.this.operation.posi-
tion.the.set.screw.slot.of.the.non.return.
valves. horizontally.. Once. the. filling. is.
completed. put. the. screws. back. in. the.
starting. position.. The. loading. pressure.
of.the.un-started.plant.should.be.1.bar..
Once the filling has been completed,
close the filling tap.
2.4.1 Emptying the plant
To. carry. out. this. operation. act. on. the.
discharge.tap.(4.fig..3.-.8.fig..3/a.-.10.fig..
3/b).. Before. carrying. out. this. operation.
check.that.the.filling.tap.is.closed.
2.5
FLUE
The.flue.for.the.atmospherical.expulsion.
of.the.combustion.products.from.natural.
draught. appliances. must. meet. the. fol-
lowing.requirements:
–. Be. gas-tight. to. the. combustion. pro-
ducts,.waterproof.and.thermally.insu-
lated.
–. Be.built.of.materials.suitable.for.keep.
resisting.to.normal.mechanical.stres-
ses,.heat,.and.the.action.of.combustion.
products.and.their.possible.condensa-
tes.
–. Follow. a. vertical. path. and. not. pre-
sent. any. throttling. throughout. its.
entire.length.
–. Be. adequately. insulated. to. prevent.
phenomena. of. condensation. or. smo-
kes. cooling,. in. particular. if. located.
outside. the. building. or. in. unheated.
ambiences.
–. Be. set. at. an. adequate. distance. from.
combustible. or. easily. inflammable.
material. by. means. of. an. air. gap. or.
suitable.insulating.material.
–. Have. beneath. the. mouth. of. the. first.
smoke. duct. a. chamber. for. collecting.
solid.material.and.any.condensate;.the.
height.of.the.chamber.must.be.at.least.
500.mm..
. Access. to. the. chamber. must. be. gua-
ranteed.by.means.of.an.opening.provi-
ded.with.an.air-tight.metal.door.
–. Have. a. circular,. square,. or. rectan-
gular. internal. cross. section;. in. the.
case. of. square. or. rectangular. sec-
tions,. the. corners. must. be. rounded.
off. with. a. radius. of. not. less. than. 20.
mm.. However,. hydraulically. equiva-
lent.cross.sections.are.allowed.
–. Be. equipped. with. a. chimney-pot. at.
the.top,.which.must.be.outside.the.so-
called.back-flow.zone,.so.as.to.prevent.
the.formation.of.back-flow,.which.pre-
vents.free.discharge.of.the.products.of.
combustion.into.the.atmosphere.
–. Be. devoid. of. mechanical. means. of.
suction.located.at.the.top.of.the.pipe.
–. No.overpressure.should.be.present.in.
a.chimney.that.passes.within.or.close.
up.to.inhabited.rooms.
2.5.1 Connecting up flue
Fig..5.refers.to.the.connection.of.the.boi-
lers.to.the.flue.or.chimney.through.smoke.
ducts.for.apparatus.of.nominal.heat.input.
not.greater.than.35.kW..
When. making. the. connection,. in. addi-
tion. to. respecting. the. dimensions. given,.
you. are. recommended. to. use. gas-tight.
materials. capable. of. resisting. over. time.
mechanical. stresses. and. the. smokes.
heat..
At. any. point. along. the. smoke. duct,. the.
95
APRE
1
2
Fig..4
KEY
1.Filling.cock
2.Non.return.valve.
OPEN
Fig..5
