Procom MN300HGA Quick start guide

1
BLUEFLAMEVENT-FREE
NATURALGAS GARAGE
HEATER
OWNER SOPERATIONANDINSTALLATION MANUAL
MN300HGAMN300TGA
NON-THERMOSTATAND
THERMOSTATMODEL
WARNING:Improperinstallation,
adjustment, alteration,serviceormaintenance
can causeinjuryorpropertydamage.Referto
thismanualforcorrectinstallationand
operationalprocedures.Forassistanceor
additionalinformationconsultaqualified
installer,serviceagency,orgassupplier.
Thisappliancemaybe installedinan aftermar-
ket*permanentlylocated,manufactured
(mobile)home, wherenotprohibitedbylocal
codes.
Thisapplianceisonlyforusewiththe typeof
gasindicated onthe rating plate.This
applianceisnot convertibleforusewithother
gases.
Donotstore,oruse gasolineorotherflammable
vaporsandliquidsinthe vicinityofthisorany
other appliance.
WHATTODOIFYOUSMELLGAS
l Do nottrytolight anyappliance.
l Donottouchanyelectrical switch;donot
useanyphone inyourbuilding.
l Immediatelycallyourgassupplierfroma
neighbor sphone.Followthegassupplier s
instructions.
l If youcannotreach yourgas supplier, call
the firedepartment.
Installationandservicemustbeperformedbya
qualified installer, serviceagencyorgas
supplier.
ImportantSafetyInformation..................................... 2
FreshAir forCombustionandVentilation ...............4
Installation.....................................................................8
Operating Your Heater............................................... 11
Cleaning&Maintenance.............................................13
TroubleShooting.........................................................14
Specifications..............................................................17
IllustratePartsBreakdownMN300TGA.................18
PartsListMN300TGA.................................................19
IllustratePartsBreakdownMN300HGA .................20
PartsList MN300HGA.................................................21
TableofContents
*Aftermarket:Completionofsale,not forpurposeof
resale, fromthe manufacturer.
WATERVAPOR:ABY-PRODUCTOFUNVENTED ROOM
HEATERS
Watervaporisaby-productofgas combustion.An
unventedroomheaterproducesapproximatelyone (1)
ounce (30ml)of waterfor every1,000BTU s(.3KW s)
of gasinputperhour. Refertopage3.
Installer:Please leave these instructionswith
theconsumer.
Consumer:Please retain these instructionsfor
futureuse.
PRO-COMPHONENUMBER:[phone]
WARNING: If the information inthis
manualisnotfollowedexactly,afireor
explosion mayresult causingproperty
damage,personalinjury, orlossof life.
WARNING:Thisisanunvented gas-fired
heater.Itusesair(oxygen)fromthe room
inwhich it isinstalled.Provisionsfor
adequatecombustionandventilationairmust
be provided.RefertoAirForCombustion
andVentilation sectiononpage4of this
manual.
CONTINENTAL APPLIANCEINC/U.S.OFFICE
5Musick4600HighlandsParkwayS.E.
IrvineSuite#D/E
CA92618 Smyrna, GA30080
NanjingPRO-COMElectricApplianceCo.,Ltd.
#6ChuangyeRoad,High NewTech.Zone,
GreatBridgeRoad North,Nanjing,210061,
China.
PR-ML062-09-0504

2
IMPORTANT
SAFETYINFORMATION
Keeptheappliancearea clear
andfreefromcombustible
materials,gasoline,andother
flammablevaporsandliquids.
1.Thisapplianceisonlyfor use
withthetypeof gasindicated
ontheratingplate.This
applianceisnotconvertiblefor
use withother gases.
2.If yousmell gas
lShutoffgassupply.
lDonottrytolightanyappliance.
lDonot touchanyelectricalswitch;
donot useanyphonein your
building.
lImmediatelycall yourgassupplier
fromaneighbor sphone.Follow
the gassupplier sinstructions.
lIfyoucannotreachyourgas
supplier,call thefiredepartment.
3.Thisheatershallnot be
installedinabedroomor
bathroom,or theplacewhich
thestrongwindwouldshut
downtheappliance.
4. Thisheaterneedsfresh,
outsideair ventilation torun
properly. Thisheaterhasan
OxygenDepletionSensor
(ODS)safetyshutoff system.
TheODSshutsdownthe
heaterifnotenoughfreshair
isavailable.See FreshAirFor
Combustion And Ventilation
pages 4and 5.
5.Keepall airopeningsinthefront
and bottomofheaterclear
andfreeofdebris.Thiswill
insureenoughair forproper
combustion.
6.Ifheatershutsoff.Donot
relightuntil you providefresh,
outsideair.If heaterkeeps
shutting off, haveit serviced.
7.Donotrun heater
lwhereflammableliquidsorvapors
areusedorstored
lunderdustyconditions
IMPORTANT: Readthis
owner smanualcarefullyand
completelybeforetrying to
assemble,operate,orservice
thisheater.Improperuseof
thisheatercancauseserious
injuryordeathfromburns,
fire,explosion,electrical
shock,and carbon monoxide
poisoning.
Due tohigh temperatures, heater
shouldbe keptoutof
trafficand awayfromfurniture
anddraperies.
Surfaceofheaterbecomes
veryhotwhenrunningheater.
Keep childrenand adultsaway
fromhotsurface toavoidburns
orclothing ignition.Heaterwill
remainhotforatimeaftershut
down.Allowsurface tocool
beforetouching.
Carefullysupervise young
childrenwhentheyareinthe
sameroomwithheater.
Make suregrillguardisin
placebeforerunningheater.
8. Turnheater off ,Beforeusing
furniturepolish,wax, carpet
cleaner, or similarproducts.If
heated,the vaporsfromthese
productsmaycreateawhite
powderresidue withinburner
boxoron adjacentwallsor
furniture.
9. Donotuse heaterifanypart
hasbeenunderwater.
Immediatelycallaqualified
service techniciantoinspect
the roomheaterandto
replaceanypartofthecontrol
systemandanygascontrol
which has beenunder water.
10.Turnoffheater and letcool
beforeservicing. Onlya
qualifiedserviceperson should
serviceand repairheater.
11. Operating heateraboveelevations
of4,500 feet couldcause pilot
outage.
DANGER: Carbon monoxide
poisoning mayleadtodeath!
Carbon Monoxide Poisoning:
Earlysignsofcarbon monoxide
poisoningresemblethefluwith
headaches,dizziness,ornausea.
Ifyou havethese signs, theheater
maynotbeworking properly. Get
fresh airatonce! Haveheater
serviced.Somepeoplearemore
affectedbycarbon monoxidethan
others.These include pregnant
women,personswithheart orlung
disease or anemia,thoseunder the
influence ofalcohol,andthose
at highaltitudes.
Natural Gas: Naturalgasisodorless.
Anodor-makingagentisadded to
natural gas. Theodor helpsyou de-
tectanatural gasleak.However,
the odoraddedtonaturalgas can
fade.Naturalgasmaybepresent
eventhough no odorexists.
WARNING:Anychangeto
thisheateroritscontrolscan
be dangerous.
Makecertainyoureadand under-
stand all warnings.Keepthismanual
forreference.Itisyourguidetosafe
andproperoperationofthisheater.
WARNING:Donot useany
accessorynotapproved for
usewiththisheater.
Donotplaceclothingorother
flammablematerialon ornear
theappliance.Neverplaceany
objectson the heater.
StateofMassachusetts: The
installation mustbemadebyali-
censed plumberorgasfitterinthe
CommonwealthofMassachusetts.
Sellersof unvented propaneor natu-
ralgas-firedsupplementalroomheat-
ersshallprovidetoeachpurchasera
copyof527 CMR30upon saleofthe
unit.
Inthe stateofMassachusetts,
unventedpropaneor naturegas-fired
spaceheatersshallbeprohibitedin
bedroomsandbathrooms.
Modeles MN300HGA, MN300TGA,
are equipped for naturalgas.Field
conversionisnot permitted.
WARNING

3
PRODUCTFEATURES
SAFETYDEVICE
Astandardrequirementforallvent-free room
heaters.Thisheaterhasapilot withanOxygen
DepletionSensor(ODS)safetyshutoff system.
TheODS/pilotshutsoffthe heaterifthereis
not enoughfreshair.
PIEZOIGNITIONSYSTEM
Thisheaterisequipped withapiezoignitor.
Thissystemrequiresnomatches,batteries,or
other sourcestolight heater.
THERMOSTATICHEAT
CONTROLONTHERMOSTAT
MODELMN300TGA
These heatershaveacontrolvalvewitha
thermostatsensing bulb.Thisresultsinthe
greatestheatercomfortandmayresult in
lower gasbills.
LOCALCODES
Installand use heater withcare.Followalllocal
codes.Intheabsenceoflocalcodes,use the
latesteditionofNational FuelGas codeANSZ223.1,
alsoknownasNFPA54*.
*Availablefrom:
AmericanNational Standards Institute,Inc.
1430Broadway
NewYork, NY10018
NationalFireProtectionAssociation, Inc.
BatterymarchPark
Quincy,MA02269
UNPACKING
1. Remove heater fromcarton.
2.Remove all protectivepackaging applied to
heater for shipment.
3. Check heater for anyshipping damage.Ifheater
isdamaged. promptlyinformdealer whereyou
boughtheater.
Figure1-Vent-Free NaturalGas Heater(Model MN300TGAShown)
Watervaporisaby-productofgas combustion.Anunvented
roomheater produces approximatelyone(1)ounce (30ml)of
waterforevery1,000BTU s(.3KW s) of gas inputperhour.
Unventedroomheatersareremommended assupplemental
heat(aroom)ratherthanaprimaryheatsource(anentire
house).Inmostsupplementalheatapplication,the water
vapordoes notcreateaproblem.Inmostapplications,the
watervaporenhancesthelowhumidityatmosphere
experienceduringcoldweather.
WATERVAPOR:ABY-PRODUCTOFUNVENTEDROOMHEATERS
Thefollowing stepswillhelpinsurethatwater
vapor doesnotbecomeaproblem.
1.Besuretheheaterissizedproperlyforthe
application,includingamplecombusionairand
circulation air.
2. Ifhigh humidityisexperienced,adehumidifier
maybe used tohelplower thewatervapor content
oftheair.
3.Donotusean unventedroomheaterasthe
primaryheatsource.

4
FRESHAIRFOR
COMBUSTIONAND
VENTILATION
PRODUCINGADEQUATE
VENTILATION
Thefollowingareexcerptsfrom
NationalFuel Gas Code. NFPA54/
ANS Z223.1, Section 5.3. Airfor
Combustionand Ventilation. All
spaces inhomes fall intooneof
thethreefollowingventilation
classifications:
1.UnusuallyTightConstruction
2.UnconfinedSpace
3.ConfinedSpace
Theinformationon pages 4
through6willhelpyou classify
yourspaceand provideadequate
ventilation.
WARNING:Thisheater
shallnotbeinstalledina
confinedspace orunusually
tightconstruction unless
provisions areprovided for
adequatecombustion and
ventilation air.Readthe
followinginstructions to
insureproperfreshairforthis
andotherfuel-burning
appliancesinyourhome.
Confinedand
UnconfinedSpace
The National FuelGas CodeANS
Z223.1 defines aconfinedspace
asaspace whosevolumeisless
than 50 cubicfeet per1,000 Btuper
hour(4.8m
3
perkw)ofthe
aggregateinputratingofall
appliances installedinthatspace
andanunconfinedspaceasa
spacewhosevolumeisnotless
than 50 cubicfeet per1,000 Btuper
hour(4.8m
3 perkw)ofthe
aggregateinputratingofall
appliances installedinthatspace.
Roomscommunicating directlywith
thespaceinwhich the
appliances areinstalled*,through
openings notfurnishedwithdoors,
areconsideredapartofthe
unconfinedspace.
Thisheatershall notbeinstalled
inaconfinedspaceorunusually
tightconstructionunless
provisionsareprovidedfor
adequatecombustionand
ventilationair.
*Adjoining roomsare
communicating onlyifthereare
doorlesspassageways or
ventilationgrillsbetweenthem.
WARNING:Ifthearea inwhich theheatermaybeoperatedissmallerthanthatdefinedas an
unconfinedspaceorifthebuilding isofunusuallytightconstruction,provideadequatecombustion and
ventilationairbyone ofthe methodsdescribedinthe NationalFuelGasCode,ANSZ223.1, Section5.3
or applicablelocalcodes.
UnusuallyTightConstruction
Theairthat leaks around doorsand
windowsmayprovideenoughfresh
airforcombustionand ventilation.
However, inbuildingsofunusually
tightconstruction, youmustprovide
additionalfreshair.
Unusuallytightconstructionis
defined asconstruction where:
a. wallsand ceilingsexposedtothe
outside atmospherehavea
continuouswatervaporretarder
witharating of oneperm(6×10-11 kg
perpa-sec-m2)orless with
openings gasketed orsealedand
b.weather stripping has been
added onopenablewindowsand
doorsand
c. caulking orsealantsareapplied
toareas suchas jointsaround
windowanddoorframes,between
soleplates and floors,between
wall-ceilingjoints,betweenwall
panels,atpenetrationsforplumbing,
electrical,and gas lines,and at
otheropenings. If yourhomemeets
allofthethree criteriaabove,you
mustprovideadditionalfresh air.
SeeVentilationAirfromOutdoors,
page6.
If your homedoesnot meetall of
thethreecriteriaabove, see
Determining Fresh-AirFlowfor
Heater Location,page 5
DETERMINING FRESH-AIRFLOWFORHEATERLOCATION
Determiningif you have aConfined orUnconfined Space*
Usethisworksheet todetermine if youhave aconfinedorunconfinedspace.
Space: Includesthe roominwhichyouwillinstallheaterplus anyadjoiningroomswithdoorlesspassageways
or ventilation grillsbetweentherooms.
1. Determinethe volumeofthespace(length×width×height)
Length×Width×Height= cu.ft. (volumeofspace)
Example: Spacesize 20ft. (length)×16ft.( width)×8ft. (ceiling height)=2560cu. ft. (volumeof space)
If additionalventilationtoadjoining roomissuppliedwithgrillsor openings, add thevolumeofthese
roomstothetotalvolumeofthe space.
2.Dividethespacevolumeby50 cubicfeettodeterminethemaximumBtu/Hrthespacecansupport.
(volumeof space) 50 cu. ft.=(MaximumBtu/Hr thespacecansupport)
Example: 2560 cu. ft. (volumeof space) 50 cu.ft.=51.2or51.200(maximumBtu/Hr thespacecansupport)

5
WARNING:Reworkworksheet, add-
ingthespaceofthe adjoining
unconfined space. Thecombinedspaces
must haveenough fresh air tosupplyall
appliancesinbothspaces.
VENTILATIONAIR
VentilationAir FromInsideBuilding
Thisfreshairwouldcomefroman
adjoiningunconfinedspace.When
ventilatingtoanadjoiningunconfined
space,youmust providetwopermanent
openings: onewithin12"of the ceiling
and onewithin12"of thefloor on the
wallconnecting the twospaces (see
options1and 2, Figure2). You canalso
removedoorintoadjoiningroom(see
option3,Figure2). FollowtheNational
Fuel GasCode NFPA54/ANSZ223.1.
Section 5.3,AirforCombustion and
Ventilation forrequired sizeof
ventilationgrillsorducts
Example:
Gas water heater 40,000 Btu/Hr
Ventfree heater + 20,000 Btu/Hr
Total=60,000 Btu/Hr
If the actualBtu/Hrusedislessthanthe maximumBtu/Hrthespace can support,the spaceisan
unconfined space.Youwill need noadditional freshairventilation.
3. Add the Btu/Hrofallfuelburningappliancesinthe space.
Vent-free heaterBtu/Hr
Gas waterheater* Btu/Hr
Gas furnaceBtu/Hr
Ventedgas heaterBtu/Hr
GasFireplacelogsBtu/Hr
Othergas appliances*+Btu/Hr
Total=Btu/Hr
*Donotincludedirect-ventgas appliances.Direct-ventdrawscombustion airfromtheoutdoorsand
ventstotheoutdoors.
4.Comparethe maximumBtu/Hr thespacecan support withtheactualamountofBtu/Hrused.
Btu/Hr(maximumthespace can support)
Btu/Hr(actualamount ofBtu/Hrused)
Example : 51,200Btu/Hr(maximumthe spacecansupport)
60,000Btu/Hr(actualamountofBtu/Hr used)
Thespaceintheaboveexampleisaconfinedspacebecause theactualBtu/Hrused ismorethan the
maximumBtu/Hrthespace cansupport.
Youmust provideadditionalfresh air. Your options areas follows:
A.Reworkworksheet, adding thespaceof an adjoining room. Iftheextraspaceprovidesanunconfined
space,removedoortoadjoining roomoradd ventilation grillsbetweenrooms.See VentilationAirFrom
Inside Building, page5.
B.Vent roomdirectlytothe outdoors.See VentilationAir FromOutdoors,page6.
C. InstallalowerBtu/Hrheater,if lowerBtu/Hrsizemakesroomunconfined.
Figure2-Ventilation AirfromInsideBuilding

6
VENTILATIONAIR
Ventilation AirFromOutdoors
Provideextrafresh airbyusing
ventilation grillsorduels:You must
provide twopermanentopenings:one
within12"of the ceilingandonewithin
12"ofthe floor.
Connectthese itemsdirectlytothe
outdoorsorspacesopentotheoutdoors.
Thesespacesinclude atticsand crawl
spaces. Followthe NationalFuelGas
Code NFPA54/ANSZ223.1,Section5.3.
AirforCombustionand Ventilation for
requiredsize ofventilation grillsorducts.
IMPORTANT: Donotprovideopenings
forinletor outletairintoatticif attichas
athermostat-controlledpowervent.
Heated air enteringthe atticwillactivate
thepowervent.
NOTICE:Thisheater is
intended foruse assupplemental
heat. Use thisheateralongwith
yourprimaryheatingsystem. Do
notinstall thisheaterasyour
primaryheatsource.If youhave
acentralheatingsystem,you
mayrunsystem scirculating
blowerwhileusing heater.This
willhelpcirculatetheheat
throughoutthehouse.Inthe
event ofapower outage,you can
use thisheateras yourprimary
heatsource.
WARNING:Aqualified
servicepersonmustinstall
heater. Followalllocalcodes.
CHECK GAS TYPE
Use onlynaturalgas.Ifyourgas
supplyisnotnatural,donotinstall
heater. Calldealerwhereyou
boughtheater forpropertypeheater.
INSTALLATION NEEDS
Beforeinstallingheater,makesure
youhavethe itemslisted below.
l piping(checklocal codes)
l sealant(resistant tonatural
gas)
l equipment shutoffvalve*
l groundjoint union
l testgauge connection*
l sedimenttrap
l teejoint
l pipewrench
*ACSA/AGAdesign-certifiedequip-
mentshutoffvalvewith1/8"NPT
tapisanacceptablealternativeto
testgaugeconnection.Purchase
theoptionalCSA/AGAdesign cer-
tifiedequipmentshutoff valvefrom
your dealer.SeeAccessories,page
17.
LOCATING HEATER
Thisheaterisdesignedtobe
mountedonawall.You canlocate
heateronfloor, away fromawall.
Anoptionalfloormountingstandis
needed.Purchasethefloor
mounting stand fromyour dealer.
SeeAccessories, page 17.
Forconvenienceand efficiency,
installheater
l wherethereiseasyaccessfor
operation,inspection,andservice
l incoldestpartofroom
Anoptional fankit isavailablefrom
yourdealer.SeeAccessories,
page 17.Ifplanningtousefan,
locateheaternearanelectrical
outlet.
INSTALLATION
CAUTION:Ifyouinstallthe
heater inahomegarage
l heaterpilotand burnermust
beatleast18inches above
floor.
l locateheaterwheremoving
vehiclewill not hit it.
CAUTION: Thisheater
createswarmaircurrents.
Thesecurrentsmoveheat
towall surfacesnextto
heater. Installingheater
nexttovinylorclothwall
coveringsoroperating
heaterwhereimpurities(such as
tobacco smoke, aromaticcandles,
cleaning fluids,oil orkerosene
lamps, etc.) intheairexistmay
discolor walls.
Figure3-Ventilation AirfromOutdoors
WARNING: Neverinstall
theheater
l inabedroomor bathroom.
l inarecreationalvehicle.
l wherecurtains, furniture,
clothing,or other flammable
objectsarelessthan 36inches
fromthefront, top, or sides
of theheater.
l asafireplaceinsert.
l inhigh trafficareas.
l inwindyordraftyareas.

7
INSTALLATION
Figure8- MountingBracket
Clearances
Figure7- Removing LowerFront
PanelOfHeater
Figure4-Mounting Clearaances
AsViewedFromFront OfHeater
Figure5- Moving Thermostat
Sensing Bulb
WARNING: Maintainthe
minimumclearancesshown
inFigure4.Ifyou can,
providegreater clearances from
floor,ceiling,andjoiningwall.
IMPORTANT:Vent-free
heatersaddmoisturetothe
air.Although thisisbeneficial,
installing heaterinrooms
withoutenough ventilation air
maycause mildewtoform
fromtoomuchmoisture.See
FreshAirforCombustionand
Ventilation,pages 4and 5.
INSTALLINGTHERMOSTAT
SENSINGBULB
ForMN300TGA
1. Pull out thesensing bulbfromthe
twoclipslocatedintheshippng
position according tothedirection
as shownbythearrow. Thereisno
needtotakeout thetwobulbclips.
2.Takeout thebulbclipfromthe
hardwarepackage and insert it into
thesquareholeand then insert the
sensing bulbintothebulbclip(see
Figure5).
FASTENING HEATERTOWALL
Mounting Bracket
Themountingbracketislocated
onback panelofheater(see
figure6).Ithas beentapedthere
forshipping.Removemounting
bracketfrombackpanel.
Removing LowerFront Panel Of
Heater
1. Removetwoscrewsnearbottom
cornersof lower front panel.
2. Pull bottomof lower front panel
forward, thendown(see Figure7).
Methods ForAttaching Mounting
BracketToWall
Onlyuse lastholeon each end
of mounting bracket toattach
bracket towall. These twoholes
are16 inches apart fromtheir
centers. Attach mounting bracket
towall onlyinoneof twoways:
1. Attachingtowall stud
2. Attaching towall anchor
AttachingtoWallAnchor: This
methodallowsyoutoattach
mountingbrackettohollowwalls
(wallareasbetween studs)orto
solidwalls(concreteormasonry).
Decidewhich method bettersuits
your needs. Either methodwill
provideasecureholdforthe
mounting bracket.
MarkingScrewLocations
1.Tapemountingbrackettowall
whereheaterwillbelocated.
Makesuremounting bracketis
level.
2.Markscrewlocations on
wall. (seeFigure8)
Note: Onlymarklastholeon
eachend ofmountingbracket.
Insert mountingscrewsthrough
theseholesonly.
3.Removetapeand mounting
bracket fromwall.
Model MN300HGA MN300TGA
Figure6-Mounting Bracket
Location
WARNING:Maintain
minimumclearances shownin
Figure8.Ifyoucan,provide
greaterclearances fromfloor
andjoiningwall.
AttachingtoWall Stud: Thismethod
provides the strongesthold. Insert
mountingscrewsthroughmounting
bracketandintowall studs.

8
INSTALLATION
Figure11- Mounting HeaterOnto
Mounting Bracket
Figure9- FoldingAnchor
Figure10 - Popping Open Anchor
WingforThinWalls
Attaching Mounting Bracket to
Wall
Note: Wall anchors, mounting
screws, andspacersarein
hardwarepackage.Thehardware
packageisprovidedwithheater.
Attaching toWal l Stud Method
For attaching mountingbracketto
wallstuds
1. Drill holes at markedlocations
using 9/64"drillbit.
2. Placemounting bracket onto
wall. Line uplast holeoneach
end of bracketwithholes drilled
inwall.
3. Insert mounting screwsthrough
bracket and intowall studs.
4. Tightenscrewsuntil mounting
bracketisfirmlyfastened to
wall studs.
Attaching toWall Anchor
Method
For attaching mountingbracketto
hollowwalls(wallareasbetween
studs)orsolidwalls.(concreteor
masonry)
1. Drill holes at markedlocations
using 5/16"drill bit. For solid
walls(concreteor masonry),
drill at least 1"deep.
2. Foldwall anchor as shownin
Figure9below.
3.Insert wall anchor(wings
first) intohole.Tapanchor
flushtowall.
4.Forthinwalls(1/2"orless),
insert redkeyintowall
anchor. Push redkeyto
"pop"openanchor wings.
5.Place mounting bracket onto
wall. Lineuplastholeon
each endof bracket withwall
anchors.
6.Insert mounting screwsthrough
bracket andintowall anchors.
7.Tightenscrewsuntilmounting
bracketisfirmlyfastened to
wall.
PlacingHeateronMounting
Bracket
1. Locatetwohorizontalslotson
back panelofheater(see
Figure11).
2.Place heaterontomounting
bracket. Slide horizontalslots
ontostand-outtabs on
mountingbracket.
InstallingBottomMounting
Screws
1.Locatetwobottommounting
holes.Theseholesarenear
bottomon backpanelof
heater(seeFigure12).
2. Markscrewlocations onwall.
3. Removeheater frommounting
bracket.
4.Ifinstallingbottommounting
screwsintoholloworsolidwall,
installwallanchors.Followsteps
1through 4underAttachingTo
Wall Anchor Method. If installing
bottommounting screwintowall
stud,drill holes atmarked
locationsusing9/64"drillbit.
5. Replaceheaterontomounting
bracket.
6. Placespacersbetweenbottom
mounting holesand wall anchor
or drilledhole.
7. Holdspacer inplacewithone
hand.Withotherhand,insert
mounting screwthrough bottom
mounting holeand
spacer. Placetipofscrewin
opening ofwall anchor or drilled
hole.
8. Tightenbothscrewsuntil heater
isfirmlysecuredtowall.Donot
over tighten.
l Note: Donot replacelower front
panel atthistime. Replacelower
frontpanelaftermakinggas
connectionsand checking for
leaks (seepage9).
IMPORTANT: Donot ham-
mer key!Forthickwalls(over1/
2"thick)orsolidwalls,
do notpop openwings.
Figure12 - InstallingBottom
Mounting Screws

9
INSTALLATION
CONNECTING TOGASSUPPLY
WARNING:Aqualified
servicepersonmustconnect
heatertogassupply.Followall
localcodes.
WARNING:Thisappliance
requiresa3/8"NPT(National
PipeThread)inletconnection
tothe pressureregulator.
WARNING: Neverconnect
heatertoprivate(non-utility)gas
well.Thisgas iscommonly
knownaswell-headgas.
IMPORTANT:Checkyour gasline
pressurebeforeconnectingheater
togas line.Gaslinepressuremust
benogreaterthan 14inchesof
water. If gaslinepressureishigher,
heaterregulatordamagecould
occur.
CAUTION: Useonlynew,
black iron orsteelpipe.
Internally-tinnedcoppertubing
maybeusedincertainareas.
Check your localcodes.Use pipe
oflargeenough diameterto
allowpropergas volumetoheater.
Ifpipeistoosmall,
undueloss ofpressurewill
occur.
TypicalInletPipeDiameters
MN300HGA/MN300TGA1/2”or
greater
Installation mustincludean
equipmentshutoff valve,union,
andplugged1/8"NPTtap.Locate
NPTtapwithinreach fortestgauge
hookup.NPTtapmustbeup
streamfromheater(seeFigure
13).
*ACSA/AGAdesign-certifiedequipment shutoff valvewith1/8"NPTtapis
anacceptablealternativetotest gaugeconnection.Purchase the optional
CSA/AGAdesign-certifiedequipmentshutoffvalvefrom
your dealer. See Accessories,page 17.
IMPORTANT:Install anequipment
shutoffvalveinanaccessible
location.Theequipmentshutoff
valveisforturningonor shutting
off thegastotheappliance.
Applypipejointsealantlightlyto
malethreads.Thiswill prevent
excess sealantfromgoing into
pipe. Excesssealant inpipe could
result inclogged heatervalves.
Installsediment trap insupplyline
as showninFigure13.Locate
sedimenttrapwhereitiswithin
reach forcleaning.Locate
sedimenttrapwheretrapped
matterisnotlikelytofreeze.A
sediment trap traps moistureand
contaminants.Thiskeeps them
fromgoingintoheater controls.If
sediment trapisnot installed oris
installedwrong,heatermay
not runproperly.
IMPORTANT:Holdpressure
regulatorwithwrench when
connectingittogas piping and/or
fittings.
CAUTION:Use pipe joint
sealantthatisresistantto
naturalgas.
Figure13 -Gas Connection

10
Figure14-Equipment Shutoff Valve
INSTALLATION
CHECKINGGAS
CONNECTIONS
WARNING:Testallgas
piping and connectionsforleaksafter
installing orservicing.Correct all
leaks atonce.
WARNING:Neveruseanopen
flametocheckforaleak. Applya
mixtureofliquidsoapand water
toall joints.Bubblesforming
showaleak.Correctall leaks at
once.
Pressure Testing GasSupply
Piping System
TestPressuresIn Excess Of
1/2PSIG (3.5KPa)
1. Disconnect appliancewithits
appliancemaingas valve
(controlvalve)and equipment
shutoff valvefromgas supply
piping system.Pressures in
excess of1/2psigwill damage
heaterregulator.
2.Cap offopenend of gas pipe
whereequipmentshutoffvalve
wasconnected.
3.Pressurize supplypiping
systembyeitherusing
compressedairoropening
maingas valve locatedonor
near gasmeter.
4.Checkalljointsofgas supply
piping system.Applymixtureof
liquidsoapand watertogas
joints.Bubbles forming show
aleak.
5. Correctall leaksatonce.
6. Reconnectheaterandequipment
shutoffvalvetogas supply.Check
reconnectedfittingsforleaks.
TestPressures EqualToor
LessThan 1/2PSIG(3.5KPa)
1.Close equipmentshutoffvalve
(see Figure14).
2.Pressurize supplypiping system
byeither usingcompressedair
oropening maingasvalve
locatedonorneargasmeter.
3. Check all jointsfromgasmeterto
equipmentshutoffvalve(see
Figure15).Applymixtureof
liquidsoapandwatertogas
joints.Bubblesforming show
aleak.
4. Correctall leaksatonce.
PressureTestingHeaterGas
Connections
1.Openequipmentshutoffvalve
(seeFigure14).
2.Open maingas valvelocatedon
or near gasmeter.
3.Make surecontrolknobof
heaterisintheOFFposition.
4.Check all jointsfromequipment
shutoff valvetocontrolvalve
(see Figure15 ). Applymixtureof
liquidsoapand water togas
joints.Bubblesformingshow
aleak.
5. Correct all leaks atonce.
6.Lightheater(seeOperating
Heater,pages11forthermostat
modelorpage12 for
non-thermostatmodel).Check
the rest ofthe internal jointsfor
leaks.
7. Turnoff heater (see ToTurnOff
GasToAppliance,page 11for
thermostatmodelorpage12
fornon-thermostatmodel).
8.Replace lower frontpanel.
THERMOSTATMODEL
MN300TGA
nFOR YOUR SAFETYn
READBEFORELIGHTING
WARNING:If you do not
followthese instructions
exactly, afireorexplosion may
resultcausingproperty
damage,personalinjuryor
lossof life.
A. Thisappliancehas apilot which
mustbelightedbyhand.
Whenlighting thepilot, follow
theseinstructionsexactly.
B.BEFORELIGHTINGsmellall
around theappliancearea for
gas.Besuretosmell nextto
the floorbecausesomegasis
heavierthan air and will settle
onthe floor .
WHATTODO IFYOU SMELLGAS
l Donot trytolight anyappliance.
l Donottouchanyelectricswitch;
donotuseanyphoneinyour
building.
l Immediatelycall yourgas
supplierfromaneighbor s
phone.Followthegas
supplier sinstructions.
l Ifyoucannotreachyour
gassupplier, callthefire
department.
C. Useonlyyourhandtopushin
orturnthe gascontrolknob.
Neverusetools. If theknob
will notpushinorturnby
hand,don t trytorepairit,call
aqualified servicetechnician or
gas supplier. Forceorattempted
repairmayresult inafireor
explosion.
D.Donotuse thisapplianceif any
part has been underwater.
Immediatelycallaqualified
servicetechniciantoinspect
theapplianceandtoreplace
anypartofthecontrolsystem
and anygascontrolwhichhas
been underwater.
Figure15 -Checking Gas Joints
OPERATINGYOURHEATER
WARING:Donotover tightengas
connections.

11
Figure16- ControlKnobinThe
OFF Position
Figure17- Pilot
THERMOSTATMODEL
MN300TGA
nLIGHTINGn
INSTRUCTIONS
1.STOP!Readthesafety
information on thesideof
heater.
2.Checkthat gas supplyto
heaterison.
3.Pushingascontrolknob
slightlyandturnclockwise
totheOFFposition.
NOTE:knob cannot beturnedfrom
“PILOT”to“OFF”unlessknob is
pushedinslightly.Donot
force.
4.Waitfive(5)minutes toclear
outanyair.Thensmell for
gas,including nearthefloor.
If you smell gas,STOP!
Follow“B”inthe safety
informationonthesideof the
heater. If you donotsmell
gas, go tothe nextstep.
5.Pushingascontrolknob
slightlyandturncounter-
clockwisetothe“PILOT/IGN”
positionanddepressfor
five(5) seconds
NOTE:Thefirsttimethatthe
heaterisoperatedafter
connectingthegassupply,the
controlknob shouldbedepressed
foraboutthirty(30)seconds.This
will allowairtobleedfromthegas
system.
6.Withcontrolknobpressed in,
pushdownand releasethe
ignitorbutton.Thiswilllight
pilot. If needed, keeppressing
ignitor button until pilotlights.
NOTE:If pilotdoes not staylit,
refertoTroubleshooting,pages 14
through 16.Alsocontactaqualified
serviceperson or gas supplierfor
repairs. Until repairsaremade, light
pilot withmatch.Tolightpilot with
match, see Manual Lighting
Procedure.
7.Keepcontrolknob pressedin
forthirty(30)secondsafter
lightingpilot. After 30
seconds, releasecontrolknob.
l Ifcontrolknobdoes notpop
upwhenreleased,contacta
qualifiedserviceperson or
gassupplierforrepairs.
NOTE:If pilotgoesout,repeat
steps3through7.Waitone(1)
minutebeforelighting pilotagain
8.Turncontrolknob
counterclockwiseto
desiredheating Level.The
mainburnershouldlight. Set
controlknob toanyheatlevel
between HIandLO.
nTHERMOSTAT n
CONTROL
OPERATION
Thisincreases ordecreasesthe
burnerflameheight. Attimes theroom
may exceed the settemperature.If
so,theburnerwill shutoff.The burner
will cyclebackonwhenroomtem-
peraturedropsbelowtheset
temperature.The controlknobcan be
settoanyheat level betweenHIand
LO.Selecting the HI settingwill cause
theburnertoremainfullyon without
modulating downinmost cases.
NOTE:thethermostatsensing
bulbmeasures thetemperature
ofairneartheheatercabinet.
Thismaynotalwaysagree with
roomtemperature(depending
onhousing construction.
installation location,roomsize,
openairtemperatures,etc.).
frequentuseofyourheaterwill
letyoudetermineyourown
comfort levels.
nTOTURN OFFn
GASTOAPPLIANCE
ShuttingOff Heater
1.Turncontrolknob clockwise
totheOFF position.
2.Turnoffall electricpower to
theapplianceifserviceisto
beperformed.
SHUTTINGOFFBURNERONLY
(PILOTSTAYSLIT)
Turncontrol knobclockwiseto
thePILOT/IGN position
nMANUALLIGHTINGn
PROCEDURE
1. Removelowerfront panel(see
Figure7page7).
2.Followsteps 1through 5
underLighting Instructions.
3. Withcontrolknob pressedin,
strikematch. Holdmatchto
pilotuntil pilotlights.
4.Keepcontrolknob pressedin
for30secondsafterlighting
pilot. After 30seconds,release
controlknob.Followstep8
under Lighting Instructions.
5. Replacelower front panel.
OPERATINGYOUR HEATER
Thethermostaticcontrolusedon
thesemodelsdiffersfromstandard
thermostats.Standardthermostats
simplyturnonandofftheburner.The
thermostatusedon thisheater
senses theroomtemperature. The
thermostat adjuststheamount
of gas flowtotheburner.

12
OPERATINGYOUR HEATER
NON-THERMOSTATMODEL
MN300HGA
nFORYOURSAFETYn
READ BEFORELIGHTING
WARNING:Ifyou do not
followthese instructionsexactly,
afireor explosion mayresult
causing propertydamage,
personalinjuryor loss of life
A.Thisappliancehas apilot
whichmustbelighted byhand.
Whenlighting thepilot, followthese
instructionsexactly.
B.BEFORELIGHTINGsmellall
aroundthe appliance areaforgas.
Besuretosmellnexttothefloor
becausesomegas isheavierthan
airandwill settleonthefloor.
WHATTODO IFYOU SMELLGAS
l Donot trytolightany
appliance.
l Donottouchanyelectric
switch,donotuse anyphone
inyourbuilding.
l Immediatelycallyour gas
supplierfromaneighbor s
phone.Followthegas
supplier sinstructions.
l If youcannotreach your gas
supplier, call thefire
department.
C.Use onlyyourhandtopush in
orturnthegascontrolknob.
Neveruse tools.Ifthe knob will
not pushinorturnbyhand,don t
trytorepairit,call aqualified
servicetechnician or gassupplier.
Force orattemptedrepairmay
resultinafireorexplosion.
D.Donot use thisapplianceifany
parthasbeen underwater.
Immediatelycallaqualifiedservice
technician toinspectthe
applianceand toreplaceanypart of
the controlsystemandanygas
controlwhichhasbeenunderwater.
nLIGHTINGn
INSTRUCTIONS
1. STOP!Readthesafety
information on thesideofheater.
2. Checkthatgas supplyto
heater ison.
3. Pushincontrolknob slightly
andturnclockwise tothe
OFF position (seeFigure18).
NOTE: Knob cannot beturned
from "PILOT "to "OFF"unless
knob ispushedinslightly.Do
notforce.
4. Waitfiveminutestoclear out
anygas.Thensmell forgas,
including nearthefloor. Ifyou
smell gas,STOP! Follow "B"in
the safetyinformation ontheside
ofheater.If youdon t smellgas,
go tothenextstep.
5. Pushinandturncontrolknob
counterclockwise toPILOT
position. Pressincontrolknob
for five(5)seconds.
Note: Youmay be running
thisheaterforthefirsttime
afterhooking uptogas supply.
Ifso, youmayneed topress
incontrol knob for30 seconds.
Thiswill allowair tobleedfrom
thegas system.
6. Withcontrolknobpressedin,
push downandreleasethe
ignitorbutton.Thiswill light
pilot.If needed, keeppressing
ignitorbuttonuntilpilotlights.
7. Keepcontrol knobdepressed
forten(10) seconds afterlighting
pilot.ifpilotgoes out, repeat
steps5,6and 7.
8. Toselectthedesiredheating
level,partiallypress downthe
controlknobslightlyand rotate
counterclockwise .Release
thedownwardpressureon the
knobwhilecontinuing toturn
until theknob locksatthe
desiredsettingposition.Donot
operatebetweenlocked
positions.
nTOTURNOFFn
GASTO APPLIANCE
ShuttingOff Heater
1.Turncontrolknobclockwise
totheOFF position.
2. Turnoff all electricpowerto
theapplianceifserviceisto
beperformed.
ShuttingOff BurnerOnly(pilot
stayslit)
Slightlypress incontrolturn
controlknob clockwisetothe
PILOTposition.
Figure18- ControlKnobinThe
OFF Position
Figure19 - Pilot
nMANUALLIGHTINGn
PROCEDURE
1. Removelowerfront panel(see
Figure7page7).
2.Followsteps 1through 5
underLighting Instructions.
3. Withcontrolknob pressedin,
strikematch. Holdmatchto
pilotuntil pilotlights.
4.Keepcontrolknob pressedin
for30secondsafterlighting
pilot. After 30seconds,release
controlknob.Followstep8
under Lighting Instructions.
5. Replacelower front panel.

13
Figure20 -CorrectPilot Flame
Pattern
Figure21- IncorrectPilotFlame
Pattern
Figure23- Incorrect Burner
FlamePattern
Figure22- CorrectBurnerFlame
Pattern
BURNERFLAME PATTERN
Figure22 showsacorrect burner
flamepattern. Figure23 showsan
incorrectburnerflamepattern.If
pilot flamepatternisincorrect, as
showninFigure23:
l turnheateroff(seeToTurnOff
GasToApplianceonpage 12 for
non-thermostatmodeland page
11for thermostat model).
lseeTroubleshootingon pages14
through16.
CLEANINGODS/PILOT AND
BURNER
l Useavacuumcleaner,
pressurizedairorasmall, soft
bristledbrushtoclean.
CLEANINGBURNERPILOT
AIRINLETHOLE
Werecommendthatyouclean the
unit every2,500hoursofoperationor
everythreemonths.Wealso
recommend that youkeeptheburner
tube and pilot assemblycleanand free
of dust and dirt. Tocleanthese parts
werecommend using compressed
airno greaterthan 30 PSl.
Your localcomputerstore,hardware
store.orhomecentermaycarrycom-
pressedair inacan. Youcanusea
vacuumcleaner intheblowposition.If
using compressedair inacan,please
followthedirectionson thecan.If you
don tfollowdirectionsonthecan,you
coulddamage the pilotassembly.
1. Shutofftheunit,including thepilot
Allowtheunittocoolfor
at leastthirtyminutes.
2.Inspectburnerand pilotfordust
and dirt.
3.Blowairthroughtheports/slots
andholes intheburner.
Also,cleanthe pilotassembly.A
yellowtipon thepilotflameindi-
cates dustand dirt inthepilot
assembly.Thereisasmallpilot air
inletholeabouttwoinchesfrom
wherethepilot flamecomesoutof
the pilotassembly(see Figure24).
Withtheunitoff lightlyblowair through
theair inlethole.You mayblowthrough
adrinking strawif compressedair is
notavailable.
Figure24- PilotInlet AirHole
CLEANING HEATERCABINET
AirPassageways
lUseavacuumcleaneror
pressurized air toclean.
Exterior
lUseasoft clothdampenedwith
amildsoapand water mixture.
Wipethecabinettoremove dust.
INSPECTING
BURNER
Check pilotflamepatternand
burnerflamepatternoften.
PILOTFLAME PATTERN
Figure20showsacorrectpilot
flamepattern. Figure21showsan
incorrectpilotflamepattern.The
incorrect pilotflameisnottouching
thermocouple.Thiswillcause the
thermocoupletocool.Whenthe
thermocouplecools,theheaterwill
shutdown.If pilotflamepatternis
incorrect, as showninFigure21:
l turnheateroff(seeToTurn
Off GasToAppliance on page
12fornon-thermostatmodelor
page11for thermostat model)
l see Troubleshootingpages 14
through16.
CLEANINGAND
MAINTENANCE
WARNING: Ifyellowtipping
occurs, yourheater couldproduce
increasedlevelsofcarbon
monoxide.Ifburner flamepattern
showsyellowtipping,followinstruc-
tionsatbottomofthispage.
Notice: Donotmistake orange
flames withyellowtipping.Dirtor
other fine particlesenterthe heater
andburncausing brief
patches of orangeflame.
WARNING: Turnoff heater
andletcoolbeforeservicing.
CAUTION: Youmustkeepcontrol
areas,burner, andcirculatingairpas-
sagewaysofheaterclean.Inspect these
areasofheaterbeforeeachuse.Have
heaterInspected yearlybyaqualified
serviceperson. Heatermayneedmore
frequentcleaning duetoexcessivelint
fromcarpeting,bedding
material,pethair,etc.

14
TROUBLESHOOTING
Note :All troubleshooting
itemsarelisted inorderof
operation.
WARNING: Onlyaqualified
serviceperson shouldserviceand
repairheater.
CAUTION:Neveruseawire,
needle, orsimilarobject toclean
ODS/pilot.Thiscan damage
ODS/pilotunit.
OBSERVED PROBLEM
Whenignitorbutton ispressedin,
thereisnosparkat ODS/pilot.
Whenignitorbutton ispressedin,
thereisasparkat ODS/pilot but no
ignition.
ODS/pilot lightsbut flamegoes out
whencontrolknob isreleased.
POSSIBLE CAUSE
1.Ignitorelectrodeispositioned
wrong.
2.Ignitorelectrode isbroken.
3. Ignitorelectrodeisnot connected
toignitorcable.
4. Ignitor cablepinchedor wet.
5.Brokenignitor cable.
6. Badpiezoignitor.
1.Gas supplyturnedoff or
equipmentshutoffvalve isclosed.
2. Controlknob not fullypressedin
whilepressing ignitor button.
3. Air ingas lines wheninstalled.
4. ODS/pilot isclogged.
5. Gas regulator setting isnot correct
6.Control knob notinPILOTposition.
1.Control knobisnot fullypressed
in.
2. Controlknobisnotpressedin
long enough.
3. Equipmentshutoff valveisnot
fullyopen.
4. Thermocoupleconnectionisloose
at controlvalve.
5Pilotflameisnot touchingthermo-
couple, Thisallows
thermocoupletocool,causing
pilot flametogo out.
Thisproblemcouldbe caused
byone or bothof thefollowing:
A)Lowgaspressure.
B)Dirtyorpartiallyclogged
ODS/pilot.
6.Thermocoupledamaged.
7. Controlvalve damaged.
REMEDY
1. Replaceignitor.
2. Replaceignitor.
3. Reconnectignitor cable.
4. Freeignitor cableif pinched by
anymetalortubing.Keep
ignitor cabledry.
5. Replaceignitor cable.
6. Replacepiezoignitor.
1.Turnon gas supplyoropen
equipment shutoff valve.
2.Fullypress incontrolknob
whilepressing ignitor button.
3. Continueholding downcontrol
knob. Repeatigniting operation
until air isremoved.
4. CleanODS/pilot (see Cleaning
and Maintenamce,Page13)or
replaceODS/pilotassembly.
5. Replacegas regulator.
6.Turncontrolknob toPILOTposition.
1. Pressincontrolknobfully.
2. After ODS/pilotlights, keepcontrol
knobpressedin30seconds.
3. Fullyopenequipmentshutoff valve.
4. Handtightenuntilsnug,then
tighten1/4turnmore.
5. A) Contactlocalnaturalgas
company.
B) CleanODS/pilot (see Cleaning
and Maintenance,Page13) or
replaceODS/pilot assembly.
6.Replacethermocouple.
7.ContactDealerorPRO-COM.

15
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
Burner(s)does notlightafter
ODS/pilotislit.
Delayedignition ofburner(s).
Burner backfiring during combustion.
Yellowflameduring burner
combustion.
Slightsmokeorodorduring
initial operation.
Heaterproducesawhistling noise
whenburner islit.
Heater produces aclicking/ticking
noisejustafterburnerislitor
shutoff.
Whitepowderresidue forming within
burnerboxoron adjacent
wallsorfurniture.
POSSIBLE CAUSE
1.Burnerorificeisclogged.
2.Burnerorifice diameteristoo small.
3. Inlet gas pressureistoo low.
1. Manifoldpressureistoo low.
2. Burner orificeisclogged.
1.Burnerorificeisclogged or
damaged.
2.Burnerisdamaged.
3. Gasregulatorisdefective.
1.Notenough air.
2. Gas regulator defective.
3. Inlet gas pressureistoo low.
1. Residues frommanufacturing
processes
.
1. TurningcontrolknobtoHI position
whenburner iscold.
2. Air ingas line.
3.Airpassagewayson heaterare
blocked.
4.Dirtyorpartiallyclogged burner
orifice.
1. Metalisexpandingwhileheating
orcontractingwhilecooling.
1.Whenheated thevaporsfrom
furniturepolish,wax,carpet
cleaners, etc. turnintowhite
powder residue.
REMEDY
1.Cleanburnerorifice(seeCleaning
and Maintenance,Page13)or
replaceburner orifice.
2. Replaceburner orifice.
3. Contact local naturalgas company.
1.Contact local naturalgascompany.
2.Cleanburner(see Cleaningand
Maintenance,Page13) or replace
burner orifice.
1. Cleanburner orifice(see Cleaning
and Maintenance,Page 13)or
replace.
2. ContactDealer or PRO-COM.
3. Replacegas regulator.
1. Check burnerfordirt anddebris.
If found,cleanburner(seeCleaning
And Maintenance,Page13).
2. Replacegas regulator.
3. Contact localnaturalgas company.
1. Problemwill stop after afewhours
ofoperation.
1.Turncontrolknob toLOposition
and letwarmup for aminute.
2. Operateburner until airisremoved
fromline. Have gas linechecked
bylocal naturalgascompany.
3.Observeminimuminstallation
clearances (seeFigure4, page7).
4.Cleanburner(see Cleaning and
Maintenance, Page13)or replace
burner orifice.
1.Thisiscommonwithmost
heaters.ifnoiseisexcessive,
contactqualifiedserviceperson.
1.Turnheateroffwhenusing
furniturepolish,wax,carpet
cleaner, orsimilarproducts.

16
TROUBLESHOOTING
Continued
WARNING: If you smellgas
l Shut offgassupply.
l Donottrytolight anyappliance.
l Donottouchanyelectricalswitch;do not useanyphone inyourbuilding.
l Immediatelycal lyourgassupplierfromaneighbor sphone. Followthe gas
supplier sinstructions.
l Ifyoucannotreachyourgassupplier, callthefiredepartment.
IMPORTANT :Operating heaterwhereimpuritiesinairexistmaycreateodors.Clean-
ing supplies, paint, paint remover, cigarettesmoke, cementsand glues,newcarpet or
textiles, etc,createfumes. Thesefumesmaymixwithcombustionairand createodors.
OBSERVED PROBLEM
Heater produces unwantedodors.
Heater shutsoff inuse(ODSoperates).
Gasodorexistsevenwhencontrol
knob isinOFFposition.
Gas odorduring combustion.
Moisture/condensation noticedon
windows.
POSSIBLE CAUSE
1. Heaterisburningvaporsfrom
paint, hair spray, glues, etc.
(SeeIMPORTANTstatement
above).
2.Gasleak.SeeWarning
Statement attop of page.
1. Notenoughfreshair isavailable.
2. Lowlinepressure.
3.ODS/pilotispartiallyclogged.
1.Gasleak.SeeWarning
Statement at top of page.
2.Controlvalveisdefective.
1. Foreign matter betweencontrol
valveandburner.
2. Gas leak. SeeWarning
Statement at top of page.
1. Notenough combustion/ventilation
air.
REMEDY
1. Ventilateroom. Stopusing odor
causing productswhileheater
isrunning.
2. Locateand correct all leaks(see
Checking Gas Connections,
Page10).
1.Openwindowand/or doorfor
ventilation.
2.Contactlocalnaturalgas
company.
3.CleanODS/pilot (seeCleaning
Page12).
1. Locateandcorrectallleaks(see
CheckingGas Connections,
Page10).
2. ContactDealerorPRO-COM
1.Takeapart gas tubing and
removeforeign matter.
2. Locateand correct all leaks
(seeCheckingGas
Connections,Page10).
1. RefertoAirfor Combustion and
Ventilation requirements, Page
4.

17
SPECIFICATIONS
Btu(available)
GasType
Ignition
PressureRegulator Setting
InletGasPressure(inchesofwater)
Maximum
Minimum
Dimensions, Inches(HxWxD)
Heater
Carton
Weight(pounds)
Heater
Shipping
MN300HGA
15,000/30,000
NaturalOnly
Piezo
3"W.C.
10.5"
4"
23 1/2×26 5/8×8
26 1/2×281/2×91/4
26
31
MN300TGA
14,000/30,000
NaturalOnly
Piezo
3"W.C
10.5"
4"
23 1/2×26 5/8×8
26 1/2×281/2×91/4
26
31
Note: Dimensionslistedareouter mostpointson theheater(includescontrolknobsandgrill).
*Forpurposes of input adjustment.
REPLACEMENTPARTS
Note: Use onlyoriginalreplacement
parts.Thiswillprotectyour warranty
coveragefor partsreplacedunder
warranty.
PARTS UNDERWARRANTY
Contact authorizeddealer from
whomyou purchasedthisproduct.
If they areunabletosupplyoriginal
replacement part(s), call the number
on the back of thismanual. When
contacting yourdealer orPRO-COM,
haveready:
l your name
l youraddress
l modeland serial numbersof
your heater
l howheater wasmalfunctioning
l typeofgas used(propane/LPor
naturalgas)
l purchase date
l WarrantyCard
Usually,wewillaskyoutoreturnthe
defectivepart tothefactory.
PARTSNOTUNDER
WARRANTY
Contactauthorized dealersof this
product. If theycan tsupply
originalreplacement part(s), contact
PRO-COM.
TECHNICALSERVICE
You mayhavefurtherquestions
aboutinstallation,operation,or
troubleshooting.Ifso,contact
PRO-COM.Theinformation islisted
ontheback ofmanual.
ACCESSORIES
Purchase these heateraccessories
fromyour localdealer. Iftheycan
notsupplythese accessories,
contactPRO-COM forinformation.
Youcanalso writetotheaddress
listedonthebackpageofthis
manual.
EQUIPMENTSHUTOFF VALVE
Forall models.Equipmentshutoff
valvewith1/8" NPT tap.Thispart
isnotcurrentlyavailablefrom
PRO-COM.
Forall models,providesbetter heat
distribution.Makesheaterorefficient.
Completeinstallationandoperating
instructions included.
Thermostatically-controlled PF06-
YJLF-B,includes three settings
ON/OFF/AUTO
FANPF06-YJLF-B

18
ILLUSTRATEDPARTS
BREAKDOWN
MN300TGA
ODS/PilotAssembly

19
PARTSLIST
MN300TGA
Thislist containsreplaceablepartsforyour heater. Whenordering replacement
parts, followtheinstructionslistedunder Replacement Partson page17 of this
manual.
KEY
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
24_1
24_2
25
26
27
MN300TGA
PARTNO.
MB10052
MB09052
MB11052
ML089-01
ML157-01
MB29001
ML069-02
SIT545-250
845-4.8x60Z
ML111-01
ML083-03
ML073-01
NRV81FI-3
96-4Z
ML079-01
MB40006
MB40022
MB40023
NBB30-000B1
ML101-01
ML091-02
ML103-01
ML104-01
ND1103x800x9
ND0803-8
ND0807
ML105-03
6170-5Z
ML060-01
MB28001
ML070-27
ML071-01
ML072-01
ML065-01
DESCRIPTION
CabinetAssembly
Lower FrontPanel Assembly
Reflector Unit
SteelWindShield
MiddlePanel
Grill GuardAssembly
Self Tapping Screw
Thermostat ValveAssembly
Screws
Thermostat ValveBase/Bracket
IgnitorAssembly
IgnitorLine
PressureRegulator
Washer
SelfLocking Screw
MainInletTubeAssembly
ODSLineAssembly
Burner InletTube Assembly
Burner
Burner connector
Injector
Left BurnerSupport Bracket
RightBurnerSupport Bracket
ODS/pilotAssembly
Thermocouple
Ignitor Electrode
ODSUpper Deflector
Nut
Mounting Bracket
AssemblyHardware
AGA/CSA Label
GasInstructionDecal
InsideWarningLabel
Thermostat SensingBulbClip
QTY
1
1
1
1
1
1
12
1
2
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
2

20
ILLUSTRATEDPARTS
BREAKDOWN
MN300HGA
ODS/PllotAssembly