Use And Maintenance; Gas Valve Adjustment; Gas Conversion - Sime RMG MK.II Serie Manual De Instalación

4 USE AND MAINTENANCE
4.1 GAS VALVE (fig. 10)
"RMG Mk.II" boilers. come. equipped.
standard. with. a. HONEYWELL. VR.4605. C.
gas.valve..(for."70 - 80" models),.VR.4605.
CB.gas.valve.(for."90 - 100" models).and.
VR.420.PB.gas.valve.(for."110" models)..
When.the.boiler.is.ignited.the.first.time,.
it. is. always. recommended. to. bleed. the.
piping. by. using. the. pressure. outlet.
upstream. from. the. valve. (7. fig.. 10. -. 9.
fig..2).
4.2 GAS VALVE ADJUSTMENT
Calibration. of. the. operating. pres-
sures. is. done. by. SIME. in. the. factory..
Consequently.they.should.not.be.altered..
Only.when.you.switch.to.another.type.of.
gas.(butane.or.propane).is.it.permitted.to.
alter.the.operating.pressures..
It is essential that this operation be
carried out exclusively by authorized
technical staff.
When the working pressures have been
adjusted, reseal the regulators.
When.the.gas.pressures.are.to.be.reset,.
this.must.be.done.following.a.set.order:.
first.the.maximum.pressure.and.then.the.
minimum.
4.2.1 Nominal pressure
adjustment (fig. 11)
Connect. the. manometer. to. the. pres-
sure. test. point. located. on. the. burner.
manifold,. turn. boiler. ON,. and. wait. until.
a. steady. reading. on. the. manometer. is.
obtained..Compare.this.reading.with.that.
shown. in. Table 1.. If. any. correction. is.
required,. use. an. 8mm. spanner. on. the.
high.pressure.adjuster.(1).turning.clock-
wise. to. increase,. counter-clockwise. to.
decrease.the.pressure.
4.2.2 Reduced pressure
adjustment (fig. 11)
Turn.the.boiler.OFF,.and.remove.the.plug.
from.the.High.-.Low.Coil..Turn.the.boiler.
ON.and.wait.until.a.steady.reading.on.the.
manometer. is. obtained.. Compare. this.
reading.with.that.shown.in.Table 1.
If. any. correction. is. required,. use. a. 3.5.
mm. flat. blade. screwdriver. to. rotate. the.
low. adjust. screw. (2),. turning. clockwise.
to. increase. and. counter-clockwise. to.
decrease.the.pressure..When.all.adjust-
ments. are. completed,. replace. the. plug.
on.the.coil,.and.the.cap.over.the.adjust-
ment.screws.
4.4 GAS CONVERSION
To.convert.to.butane.gas.(G30).or.propa-
ne. gas. (G31),. the. main. nozzles. must. be.
replaced.with.another.supplied.in.the.boi-
HONEYWELL VR 4605 C - VR 4605 CB
HONEYWELL VR 420 PB
TABLE 1
.
Methane - G20
Burner.max..pressure. mbar.
Burner.min..pressure. mbar.
Butane - G30
Burner.max..pressure. mbar.
Burner.min..pressure. mbar.
Propane - G31
Burner.max..pressure. mbar.
Burner.min..pressure. mbar.
KEY
. 1. EV1.coil
. 3. Pressure.
. . regulator.3...20.mbar
. 4. EV2.coil
. 5. LPG.adaptor
. 6. Plastic.cap
. 7. Pressure.inlet.upstream
. 8. Pressure.inlet.
. . downstream
. 9. EV1-.EV2.coil
1
9
2
3
70 Mk.II 80 Mk.II 90 Mk.II
.
9.3. 9.1. 9.3.
4.5. 4.6. 4.7.
25.2. 25.4. 25.1.
12.2. 12.3. 12.0.
32.6. 30.2. 30.0.
16.4. 16.1. 15.6.
KEY
. 1. Maximum.pressure.adjusting.nut.
. 2. Minimum.pressure.adjusting.screws
. 3. Plastic.cap
IT
ES
FR
ENG
Fig..10
100 Mk.II 110 Mk.II
9.3. 9.3
4.7. 4.6
25.1. 25.6
12.5. 12.6
32.7. 34.3
16.6. 16.6
.
Fig..11
49