Lennox Hearth Products MONTEBELLO LSM40MP-2 Installation Instructions Manual page 32

SIT Millivolt Gas
Valve Shown
Pressure
Regulator
SIT Electronic Gas Valve
LO
HI
Pressure
Regulator
Millivolt & Electronic Gas Valves
Figure 57
Step 6...Refer.to.Figure 58 .and.remove.the.
pilot.hood.assembly.to.access.the.hexed.pilot.
orifice.. . Remove. and. replace. the. orifice. with.
the.one.provided.with.the.kit.
Lennox.Hearth.Products.reserves.the.right.to.make.changes.at.any.time,.without.notice,.in.
design,.materials,.specifications,.prices.and.also.to.discontinue.colors,.styles.and.products..
Consult.your.local.distributor.for.fireplace.code.information.
Printed.in.U.S.A..©.2005.by.Lennox.Hearth.Products
P/N 850,026M REV. E 03/2010
32
SIT Millivolt Pilot Assembly Shown
Remove
These
Components
Millivolt & Electronic Pilot Assemblies
Figure 58
Step 7...(Refer.to.Figure 56 on Page 31 and
Figure 59)
VERIFY THE PROPER ORIFICE SIZE BE-
FORE INSTALLING IT.
A..Remove..the.orifice.from.the.manifold.and.
replace.it.with.the.one.provided.in.the.kit..See.
the.following.table.for.orifice.sizes.for.natural.
and.propane.models. Figure 59 illustrates.
the. orifice.. . Use. pipe. joint. compound. or.
Teflon.tape.on.all.pipe.fittings.before.installing.
(ensure.propane.resistant.compounds.are.
used.in.propane.applications,.do.not.use.pipe.
joint.compounds.on.flare.fittings)..
B..Retrieve.the.burner.and.slide.the.venturi.tube.
over.the.orifice...Set.the.burner.assembly.
into.its.position.and.secure.it.
C..Reinstall.the.grate.assembly..
NOTE:.DIAGRAMS.&.ILLUSTRATIONS.ARE.NOT.TO.SCALE.
Thermopile
(on millivolt
pilot assem-
blies only)
Pilot
Orifice
SIT Electronic Pilot
Pilot
Orifice
Burner Orifice Sizes
Elevation 0-4500 feet ( 0-1372 meters)
Model Nat.Gas
drill size (inches)
LSM40-2 .1405" (#28)*
• H2286
LSM45-2 .161" (#20)*
• H2288
* Standard size installed at factory
Table 9
• Part /Cat. Number
Figure 59
Step 8..Reassemble.the.remaining.components.
by. reversing. the. procedures. outlined. in. the.
preceding.steps...
Step 9..Attach.the.conversion.label.provided.
in.the.conversion.kit.to.the.rating.plate.on.the.
appliance.
Step 10..Turn.on.gas.supply.and.test.for.gas.
leaks.
Step 11.. Attach. manometer. to. the. manifold.
side. pressure. test. fitting. and. verify. manifold.
pressure.reads.3.5.inches.water.column.(0.87.
kPa). for. natural. gas,. and. 10.0. inches. water.
column.(2.49.kPa).for.propane.gas.
ALWAYS TEST PRESSURES WITH THE VALVE
REGULATOR CONTROL AT THE HIGHEST
SETTING.
1508 Elm Hill Pike, Suite 108 • Nashville, TN 37210
Propane
drill size (inches)
.086" (#44)*
• H2287
.093" (#42)*
• H4816