Sime RX 19 TP Manual Download Page 43

Page: 43 / 48

must be carried out using soapy
water or special products. Do not
use naked flames. The conversion
to different gas must be carried out
exclusively by authorized technical
personnel.

4.5

REMOVING THE CASING

It.is.possible.to.completely.disassem-
ble.the.shell.for.an.easy.maintenance.
of. the. boiler. following. these. simple.
instructions:
–..Remove. the. boiler. top. which. is.

fixed.with.pressure.plugs.

–..Remove.the.panelboard.
–..To.remove.the.door,.unscrew.com-

pletely. the. screw. fixing. the. top.
hinge.and.lift.the.door,.removing.it.
from. the. fixed. plug. of. the. bottom.
hinge.

–..Remove. front. and. back. panels. by.

loosening. the. four. nuts. which. fix.
them.to.the.panels.side.

–. Remove.the.sides.

4.6

MAINTENANCE

In order to ensure functionality and
efficiency, the device must undergo
annual checks carried out by quali-
fied technical personnel.

4.6.1 Checking and cleaning

the iron cast heat exchanger

Follow.the.operations.below.to.clean.
the.iron.cast.heat.exchanger:
–..Take.off.the.boiler.top.
–..Remove.the.smoke.chamber.clea-

ning.plate.by.unscrewing.the.faste-
ning. screws. in. the. RX 19-26 TP.
boilers.

–. Remove.the.smoke.chamber.com-

pletely. unscrewing. the. two. nuts.
from. the. back. side. and. the. nut.
from.the.front.side.of RX 37÷55 TP
boilers.

–..Extract. the. burner. assembly. by.

unscrewing.the.four.screws.which.
fix.it.to.the.valve.flange.

–..With. the. appropriate. brush,. reach.

down. to. the. rows. of. plugs. of. the.
cast. iron. exchanger. from. the. top.
and.scrape.off.any.scale.with.verti-
cal.movements.

–..Remove.the.burners.from.the.noz-

zle.holder.header.and.throw.a.jet.of.
air.inside.them.so.that.any.dust.can.
be.removed..Make.sure.that.the.top.
drilled. part. of. the. burners. has. no.
scale.left.

–..When.disassembling.and.reassem-

bling.the.burners.be.careful.not.to.
force. any. delicate. parts,. such. as.
the.thermocouple.drill.or.the.igni-
tion.unit.

–..Scrape.off.any.scale.from.the.boi-

ler.bottom.and.reassemble.all.the.
parts. checking. the. position. of. the.
gaskets.

–..Check. the. stack. making. sure. the.

flue.is.clean.

–..Check.the.correct.operation.of.the.

equipment.

4.6.2 Checking and cleaning

the main burner

Address.a.water.jet.inwards.the.bur-
ners. so. to. remove. the. accumulated.
dust..Ensure.that.the.burner.perfora-
ted.upper.part.is.free.from.scale.
When. disassembling. and. reassem-
bling.the.burner,.do.not.force.on.the.
delicate. components,. such. as. the.
thermocouple,. thermopile. and. pilot.
burner.

4.6.3 Checking and cleaning

the pilot burner

Clean. the. primary. air. inlet. hole. and.
pilot.nozzle.with.an.air.jet..Check.that.

the. burner. flame. licks. the. thermo-
couple.and.thermopile.tip.completely.

4.6.4 Checking the thermopile

efficiency

If. correctly. heated,. the. thermopile.
generates. the. current. required. for.
the. gas. valve. to. work.. If. correctly.
heated,. the. thermopile. generates.
700/800. mV. voltage,. which. must. be.
measured. using. a. millivoltmeter. on.
the.two.cable.connection.terminals.to.
the.gas.valve.
The.operator.of.the.gas.valve.requires.
about.300mV.voltage.
The. poor. voltage. of. the. thermopile.
prevents.the.system.from.working.

4.6.5 Checking the

thermocouple efficiency

If.heated.correctly,.the.thermocouple.
generates. the. voltage. required. for.
keeping. energised. the. magnet. that.
controls. the. gas. passage. opening. to.
the.pilot.burner.
Normally,.the.thermocouple.genera-
tes. 5/7. mV,. which. must. be. measu-
red.using.a.millivoltmeter.on.the.two.
thermocouple. connection. terminals.
to. the. manual. reset. safety. thermo-