Sime RX 19 TP Manual Download Page 42

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4.1

ACTIVATION AND

SIT 820 NOVA mV

GAS VALVE

ADJUSTMENT (fig. 7)

-.Check.that.both.the.system.and.boi-

ler.are.full.of.water.and.fully.vented..
Remove.the.inlet.pressure.gauge.on.
the.gas.valve.(7).and.engage.a.water.
column. gauge.. Open. the. gas. cock..
Check.that.the.upstream.gas.pres-
sure. is. equal. to. or. slightly. higher.
than.20.mbar..(Attention:.if.pressure.
exceeds.37.mbar,.insert.the.pressu-
re.reducers.upstream.the.boiler.or.
boiler.room).

-.Rotate.the.control.knob.(1).to.the.pi-

lot.position..Fully.press.the.control.
knob..The.gas.will.start.leaking.from.
the. pilot.. Switch. the. pilot. on. using.
the. piezoelectric. activator.. When.
the.pilot.is.on,.wait.about.20.minutes.
before. releasing. the. control. knob..
The.pilot.will.remain.on..Otherwise,.
repeat.the.operation.

-.Rotate.the.control.knob.to.the.bur-

ner.position.

-. Remove. the. downstream. pressure.

connection. screw. on. the. valve. (8)..
Move.the.water.column.gauge.to.the.
downstream. pressure. connection..
Tighten. the. inlet. pressure. connec-
tion.screw.

-.Set.the.required.temperature.on.the.

boiler.thermostat..When.the.burner.
is.fully.on,.calibrate.the.burner.gas.
pressure. (using. adjustment. screw.
2). referring. to. the. values. indicated.
in.the.technical.data.table.(point.1.3).
according.to.the.type.of.gas.used.

-.Seal.the.performed.adjustment.
-. If. the. burner. does. not. switch. on,.

check. that. sufficient. voltage. rea-
ches.the.gas.valve.

4.3

ADJUSTING THE GAS

PRESSURE TO BURNERS

Pressure. calibration. and. gas. input.
are.carried.out.by.the.manufacturer..
During.installation.of.the.equipment,.
feed.pressure.might.be.different.from.
standard.values..
It. is. therefore. necessary. to. check.
pressure.and.gas.input.when.igniting.
the.boiler.for.the.first.time..
This. test. should. be. performed. with.
the.boiler.in.full.operation.(obviously.
no. other. gas. appliances. should. be.
working.at.the.same.time)..Read.the.
gas. meter. twice. every. 6. minutes..
Multiply. the. consumption. by. ten. to.
calculate.the.consumption.per.hour..
If. this. value. does. not. correspond. to.

the.one.in.point.1.3,.turn.the.screw.of.
the. pressure. regulator. on. the. valve.
until. the. exact. value. is. obtained..
Screw. slowly. and. gradually.. Read.
the.gas.meter.at.least.thirty.seconds.
after.regulating.the.pressure.

4.4

GAS CONVERSION

(fig. 8)

A. kit. is. supplied. complete. with. the.
necessary.change-over.materials.for.
operation. with. butane. gas. (G30). or.
propane. gas. (G31).. Operate. in. the.
following. manner. for. changing. over.
from.one.gas.to.another:
–. Replace.the.main.nozzles.and.pilot.

nozzle.supplied.in.a.kit.

–. Fully. tighten. the. gas. valve.

adjustment.screw.(2.fig..7).

–. Set. valve. input. pressure. at. 30/37.

mbar. according. to. the. type. of. gas.
by. acting. on. the. outer. pressure.
reducer.

–. When. the. working. pressures. have.

been. adjusted,. reseal. the. regula-
tors.

–. After. have. ultimated. the. conver-

sion.of.the.boiler,.please.stick.onto.
the.casing.panel.the.plate.showing.
the. relevant. feeding. gas. which. is.
included.into.the.kit.

NOTE: After assembling all the gas
connections, a test for gas tightness

4 USE AND MAINTENANCE

Fig..7

KEY
. 1. Control.knob
. 2.. Burner.pressure.adjustment.screw
. 3.. Pilot.flow.rate.adjustment.screw
. 4.. Thermocouple.connection
. 7.. Power.pressure.connection
. 8.. Burner.pressure.connection
. 9.. Burner.solenoid.valve