Procom ML170EPC Quick start guide

OWNERSOPERATION ANDINSTALLATIONMANUAL
WARNING:Improperinstallation,
adjustment,alteration,serviceor
maintenance cancauseinjuryorprop-
ertydamage.Refertothismanualfor
correctinstallationand operational
procedures. Forassistance oraddi-
tionalinformation consultaqualified
installer,serviceagency,orgas
supplier. Thisappliance maybeinstalledinan
aftermarket*permanentlylocated,
manufactured(mobile)home, where
notprohibitedbylocalcodes.
Thisapplianceisonlyforusewiththe
typeofgasindicatedontherating
plate.Thisapplianceisnotconvertible
forusewithothergases.
*Aftermarket:Completion of sale, not forpurpose of
resale, fromthe manufacturer.
Donot store,oruse gasoline orotherflammable
vaporsand liquids inthevicinityof thisorany
otherappliance.
WHATTO DOIF YOUSMELL GAS
l Donottrytolight any appliance.
l Donottouch any electricalswitch;donot
use any phone inyourbuilding.
l Immediatelycallyourgassupplierfroma
neighbor sphone.Followthegassupplier s
instructions.
l Ifyou cannotreach yourgassupplier,call
thefiredepartment.
Installationandservicemust beperformedbya
qualifiedinstaller, service agencyorgas
supplier.
ML170EPCML170EHPC
ML250EPCML250EHPC
INFRARED VENT-FREE
PROPANE/LPGAS
SPACE HEATER
WARNING: Iftheinformation in
thismanualisnotfollowedexactly,
afireorexplosionmayresult
causingpropertydamage, personal
injury, orloss oflife.
WARNING: Thisisanunvented
gas-firedheater. Ituses air(oxygen)
fromtheroominwhichitis
installed. Provisionsforadequate
combustionandventilationairmust
beprovided.RefertoAirFor
CombustionandVentilationsectionon
page5ofthismanual.
Installer:Pleaseleavetheseinstructionswiththe
consumer.
Consumer:Please retain theseinstructionsfor
futureuse.
Continental Appliance Inc./USOffice
5Musick 4600 HighlandsParkwayS.E.
IrvineSuite#D/E
CA 92618SmyrnaGA30080
TOLLFREENUMBER:1-877-886-5989
Nanjing PRO-COMElectricApplianceCo.,Ltd.
#6 ChuangyeRoad,High NewTech.Zone,
GreatBridgeRoadNorth,Nanjing,210061,China.
PR-MCL051-05-0506
WATERVAPOR:ABY-PRODUCTOFUNVENTEDROOM
HEATERS
Watervaporisaby-product ofgascombustion.An
unventedroomheaterproduces approximatelyone(1)
ounce (30ml) of waterforevery1,000 BTU s
(.3KW s) ofgas input perhour. Refertopage 4.

TableofContents
SafetyInformation......................................................................................2
..
ProductFeatures..................................................................................... 3
..
LocalCodes..............................................................................................3
..
Unpacking................................................................................................. 4
AirforCombustionandVentilation.........................................................5
..
Installation.................................................................................................. 7
..
ConnectingtoGasSupply.......................................................................9
CheckingGasConnections...................................................................10
OperatingYourHeater.............................................................................11
Cleaning&Maintenance.........................................................................14
...
ReplacementParts..................................................................................16
Specifications....................................................................................... ...16
Troubleshooting........................................................................................17
PartsList...........................................................................................................20
Whenusedwithout freshair, heater
maygiveoff CARBON MONOXIDE,an
odorless,poisonousgas.
ThisheaterisequippedwithaPILOT
LIGHTSAFETYSYSTEMdesignedto
turnoff theheater ifnotenough freshair
isavailable
WARNING
Makecertainyou readandunder-
stand allwarnings. Keep this
manualfor reference. It isyour
guidetosafeandproperoperation
ofthisheater.
IMPORTANT:Readthis
owner smanualcarefullyand
completelybeforetrying to
assemble,operate,orservice
thisheater.Improperuse of
thisheatercancause serious
injuryordeathfromburns,
fire,explosion,electrical
shock,and carbon monoxide
poisoning.
DANGER:Carbon monoxide
poisoning mayleadtodeath!
Ifheatershutsoff, do notrelightuntil
youprovidefreshair.
If heater keepsshuttingoffhaveit ser-
viced.Keepburnerand controlcom-
partmentclean.
Earlysigns ofcarbon monoxidepoi-
soningresemblethefluwith
headache,dizzinessand/or nausea.
If you havethese signs,heatermay
notbeworking properly. Getfreshair
at once! Haveheater serviced.Some
people-pregnantwomen,persons
withheart orlungdisease,anemia,
those undertheinfluenceofalcohol,
thoseathigh altitude-aremoreaf-
fected bycarbonmonoxide than
others.
DONOTINSTALL HEATERUNTILALL
NECESSARYPROVISIONS ARE
MADEFORCOMBUSTIONANDVEN-
TILATIONAIR.CONSULTTHEWRIT-
TENINSTRUCTIONSPROVIDED
WITHTHEHEATER FOR
INFORMTIONCONCERNINGCOM-
BUSTIONANDVENTILATION AIR.IN
THEABSENCE OFINSTRUCTIONS.
REFER TOTHE NATIONALFUEL
GASCODE. ANSIZ223.1. SECTION
5.3OR APPLICABLELOCALCODES.
SAFETYINFORMATION
DO NOTTAMPER WITHPILOTLIGHT
SAFETYSYSTEM!
CARBON MONOXIDE POISON-
INGMAYLEADTODEATH!
Propane/LP Gas: Propane/LP
gasisodorless.Anodor-making
agentisaddedtoPropane/LP
gas. The odorhelpsyou detect a
Propane/LPgasleak.However,
theodoraddedtoPropane/LPgas
can fade.Propane/LPgasmay
be presenteven thoughno odor
exists.
WARNING
2

3
5.Thisheater needsfresh,outside
airventilation torun properly. This
heaterhas an OxygenDepletion
Sensor(ODS)safetyshutoff
system.The ODSshutsdownthe
heater ifnotenoughfreshairis
available.See FreshAirfor Com-
bustion andVentilation pages5
and7.
6.Keepall airopeningsinfrontand
bottomof heater clear and free of
debris.Thiswillinsureenough air
forpropercombustion.
7.Ifheater shutsoff. Donot relight
until youprovide fresh,outside
air. Ifheaterkeeps shuttingoff,
haveit serviced.
8.Donotoperate
Whereflammableliquidsor
vaporsareusedorstored
Underdustyconditions
9.Beforeusingfurniturepolish,wax,
carpet cleaner, orsimilar
products, turnheater off.If
heated, thevaporsfromthese
productsmaycreateawhite
powder residuewithinburner
boxoronadjacentwallsor
furniture.
10.Donot useheaterif anypart
hasbeenunder water.Immediately
callaqualified servicetechnician
toinspect theroomheater and to
replaceanypartofthecontrol
systemand anygas controlwhich
hasbeen underwater.
11. Turnoffand unplugheaterand
let coolbeforeservicing. Onlya
qualifiedservice personshould
service andrepairheater.
12.Operating heater aboveelevations
of4,500 feetcouldcausepilot
outage.
SAFETYINFORMATION
1. Thisapplianceisonlyfor usewith
the typeofgasindicatedon the
rating plate.Thisapplianceisnot
convertibleforuse withothergases.
2. Donot placepropane/LPsupplytank
(s)insideanystructure. Locatepro-
pane/LPsupplytank(s)outside.
3. If yousmellgas
13. Topreventperformanceproblems,
do not use propane/LPfueltankof
lessthan100lbs.capacity.
Front surface of heaterbecomes
veryhotwhen running heater.
Keepchildrenandadultsaway
fromhot surfacetoavoidburns
orclothingignition.Heaterwill
remainhotforatimeaftershut
down.Allowsurface tocool
beforetouching.
Donot place clothing orother
flammablematerialonornear
the appliance. Neverplace any
objectson the heater.
Carefullysuperviseyoung
children whentheyareinthe
sameroomwithheater.
Makesuregrillguardisin
place beforerunning theheater.
Keepthe appliancearea clear
and free fromcombustible
materials,gasoline,and other
flammablevaporsand liquids.
WARNING: Do notuseany
accessorynotapprovedfor
usewiththisheater.
WARNING: Anychangeto
thisheateroritscontrolscan
bedangerous.
ModlesML170HPC, ML170EHPC,
ML250EPC, ML250EHPCareequipped
forpropanegas.Fieldconversion is
notpermitted.
Duetohightemperatures,heater
shouldbekeptoutof
trafficand away fromfurniture
and draperies.
4.Thisheater shall not beinstalled
inabedroomor bathroom.
WARNING
Immediatelycall yourgas
supplierfromaneighbor s
phone.Followthe gas
supplier sinstructions.
Ifyoucannot reachyourgas
supplier, call the fire
department.
PRODUCTFEATURES
SAFETYPILOT
Thisheaterhasapilot withan
OxygenDepletionSensor(ODS)
safetyshutoff system. TheODS/
pilotshutsoff theheater if there
isnot enoughfresh air.
AUTOMATICIGNITION
SYSTEM
Thisheater isequippedwithan
automaticcontrolsystem.
Thissystemrequires nomatches,
orbatteriestolightheater.
TOUCH PAD
THERMOSTATICHEAT
CONTROL
Thisheaterwas acontrolmodule
withathermostat sensingbulb.Set
desired temperaturewithtouch pad.
Thisresultsinthegreatestheater
comfort andmay result inlower
gasbills.
MANUALOVERRIDE
CONTROLSYSTEM
(ML170EHPC, ML250EHPC)
Therearetwocontrolsystems,
electricandmanual overide.
Ifnoelectricpowerisavailable,
youcanoperateheaterbymanual
overide.
LOCALCODES
Thisheaterisdesignedforvent-free
operation.Somestateand local
codesprohibit the use ofvent-free
heater.
Shutoff gassupply.
Donottrytolight anyappliance.
Donottouchanyelectricalswitch,
donot use anyphone inyour
building.
(SeeFigure1,page 4)

4
Installanduseheaterwithcare. Followall local
codes. Inthe absence of localcodes, usethe
latesteditionof NationalFuelGascodeANSI
Z223.1,alsoknownasNFPA54*.
*Availablefrom:
AmericanNationalStandards Institute, Inc.
1430 Broadway
NewYork, NY10018
NationalFireProtectionAssociation, Inc.
1Batterymarch Park
Quincy,MA02269-9101
Figure1-Vent-Free Heater
UNPACKING
1. Removeheaterfromcarton.
2.Removeall protective packaging appliedto
heater forshipment.
3.Checkheater foranyshipping damage.Ifheater
isdamaged, promptlyinformdealer whereyou
boughtheater.
Water vapor isaby-product of gascombustion.Anvent-
free roomheaterproducesapproximatelyone(1) ounce
(30ml)ofwaterforevery1,000BTU s(.3KW s)ofgas
inputperhour.
Vent-free roomheatersareintendedfor supplementalheat
(aroom)ratherthanaprimaryheat source(anentirehouse).
Inmostsupplemental heatapplication,the watervapordoes
not createaproblem. Inmostapplications, thewater vapor
enhancesthe lowhumidityatmosphereexperience during
coldweather.
Thefollowingstepswillhelpinsurethatwatervapor does
not becomeaproblem.
WATERVAPOR:ABY-PRODUCTOFVENT-FREEROOMHEATERS
2.Ifhigh humidityisexperienced,adehumidifiermay be
usedtohelplowerthewatervaporcontentoftheair.
3. Donot useavent-freeroomheater astheprimaryheat
source.
TouchPad
ON/OFF Switch
Burners
LowerFrontPanel
SafetyPilot ControlKnob for ManualOverride
ControlSystem
Door
Ignitor for ManualOverride Control
System
GrillGuard
CabinetTop
IMPORTANT:Vent-freeheatersaddmoistureto
the air.Althoughthisisbeneficial,installingheater
inroomswithoutenoughventilationair may
causemildewtoformfromtoomuchmoisture.
See FreshAir forCombustionandVentilation, pages
5and6.
1.Besurethe heaterissizedproperlyforthe
application,includingamplecombustionandventilationair.
StateofMassachusetts:Theinstallation must be
madebyalicensed plumberorgas fitter inthe
CommonwealthofMassachusetts.
Sellersofunventedpropaneornaturalgas-fired
supplementalroomheatersshall providetoeach
purchaseracopyof527CMR30uponsaleof the
unit.
IntheStateof Massachusetts, unventedpropane
and naturalgas-firedspaceheatersshall be
prohibitedinbedroomsand bathrooms.
PRODUCTFEATURES
LOCALCODES CONTINUED

5
AIRFORCOMBUSTION
ANDVENTILATION
PROVIDINGADEQUATE
VENTILATION
Thefollowing areexcerptsfrom
National Fuel Gas Code. NFPA
54/ANSIZ223.1, Section 5.3. Air for
Combustionand Ventilation. All
spaces inhomes fall intooneof
thethreefollowingventilation
classifications:
1.UnusuallyTightConstruction
2.UnconfinedSpace
3.ConfinedSpace
The informationonpages5
through6willhelpyouclassify
yourspaceand provideadequate
ventilation.
WARNING:Thisheater shall
notbe installedinaconfined
spaceorunusuallytightconstruc-
tion unless provisionsarepro-
videdforadequatecombustion
andventilationair. Readthe
following instructionstoinsure
proper fresh air forthisandother
fuel-burning appliancesinyour
home.
Confinedand
UnconfinedSpace
TheNationalFuelGasCode
ANSIZ223.1 definesaconfined
spaceas aspace whosevolume
islessthan 50cubicfeet per1,
000Btuper hour(4.8m3perkw) of
theaggregateinputratingofall
appliances installedinthatspace
andan unconfined space asa
spacewhosevolumeisnotless
than 50cubicfeet per1,000 Btu
perhour(4.8m3 perkw)ofthe
aggregateinput ratingof all
appliances installedinthatspace.
Roomscommunicatingdirectlywith
the spaceinwhichtheappliances
areinstalled*,through openings not
furnishedwithdoors,areconsid-
eredapartoftheunconfined
space.
Thisheatershall notbeinstalledin
aconfined spaceorunusuallytight
construction unless provisionsare
providedforadequatecombustion
andventilationair.
*Adjoining roomsarecommunicat-
ingonlyif therearedoorlesspassage-
waysor ventilation grillsbetweenthem.
UnusuallyTightConstruction
Theairthat leaks around doorsand
windowsmayprovideenoughfresh
airforcombustionand ventilation.
However, inbuildingsofunusually
tightconstruction, youmustprovide
additionalfreshair.
Unusuallytightconstructionis
defined as constructionwhere:
a.Wallsand ceilingsexposedtothe
outsideatmospherehave acon-
tinuouswatervaporretarderwitha
rating ofoneperm(6×10-11 kgper
pa-sec-m2)orless withopenings
gasketedorsealedand
b.Weatherstrippinghasbeen
addedonopenablewindowsand
doors and
c.Caulkingorsealantsareapplied
toareas such as jointsaround
windowanddoorframes,between
soleplates andfloors,between
wall-ceiling joints,betweenwall
panels,atpenetrationsforplumbing,
electrical,and gas lines,andat
other openings. Ifyourhomemeets
all ofthe three criteriaabove, you
mustprovide additionalfreshair.
See Ventilation AirFrom
Outdoors,page 6.
If your homedoesnot meetallofthe
three criteriaabove,see Determin-
ingFresh-AirFlowfor Heater
Location,page5.
DETERMINING FRESH-AIRFLOWFORHEATERLOCATION
Determining if you haveaConfined 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: Spacesize20ft. (length)×16ft.( width)×8ft. (ceiling height)=2560cu. ft. (volumeof space)
If additionalventilationtoadjoiningroomissupplied withgrillsoropenings,addthevolumeoftheserooms
tothe totalvolumeofthespace.
2.Dividethespacevolumeby50 cubicfeettodeterminethemaximumBtu/Hrthespacecansupport.
(volumeof space) 50 cu. ft.=(MaximumBtu/Hr thespacecansupport)
Example: 2560 cu. ft. (volumeof space) 50 cu.ft.=51.2or 51.200(maximumBtu/Hr thespacecansupport)

6
Reworkworksheet, addingthe spaceofthe adjoining
unconfined space. Thecombinedspacesmust have
enoughfreshair tosupplyallappliancesinbothspaces.
Ventilation AirFromInsideBuilding
Thisfreshair wouldcomefromanadjoin-
ingunconfinedspace.Whenventilatingto
anadjoining unconfinedspace,youmust
providetwopermanentopenings: one within
12"of theceiling and one within12"ofthe
floor on thewall connectingthetwospaces
(see options1and 2, Figure2). You canalso
removedoorintoadjoiningroom(see option
3, Figure2). Followthe NationalFuelGas
Code NFPA54/ANSIZ223.1. Section 5.3,Air
for Combustionand Ventilation for required
size of ventilationgrillsorducts.
If the actualBtu/Hrusedislessthanthe maximumBtu/Hrthespace can support,the spaceisan
unconfinedspace.Youwillneednoadditionalfreshair ventilation.
Example:
Gas water heater 40,000 Btu/Hr
Ventfree heater + 18,000 Btu/Hr
Total=58,000 Btu/Hr
3. Add the Btu/Hrofallfuelburningappliancesinthe space.
Vent-free heaterBtu/Hr
Gas waterheater* Btu/Hr
GasfurnaceBtu/Hr
Ventedgas heaterBtu/Hr
GasFireplacelogsBtu/Hr
Other gas 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(maximumthespace can support)
58,000Btu/Hr(actualamountofBtu/Hr used)
Thespaceintheaboveexampleisaconfinedspacebecause theactualBtu/Hrused ismorethan the
maximumBtu/Hrthe spacecansupport.
Youmustprovide additionalfresh air. Youroptions areasfollows:
A. Reworkworksheet, addingthespace ofan adjoiningroom.If theextraspaceprovidesanunconfined
space,removedoortoadjoining roomoradd ventilation grillsbetweenrooms.See VentilationAirFrom
insideBuilding
B.Vent roomdirectlytotheoutdoors.SeeVentilationAir FromOutdoors
C. InstallalowerBtu/Hrheater,iflowerBtu/Hr size makesroomunconfined.
Figure2-Ventilation AirfromInsideBuilding
Figure3-Ventilation AirfromOutdoors
Ventilation AirFromOutdoors
Provideextrafreshair byusingventilation
grillsor ducts:Youmustprovidetwo
permanent openings:onewithin12"ofthe
ceiling andonewithin12"ofthefloor.
Connectthese itemsdirectlytothe
outdoorsorspaces open totheoutdoors.
These spaces includeatticsandcrawl
spaces.Followthe NationalFuelGas
CodeNFPA54/ANSIZ223.1, Section 5.3. Air
forCombustion and Ventilation forre-
quiredsizeofventilation grillsorducts.
IMPORTANT: Donot provideopeningsfor
inlet oroutlet airintoatticif attichas a
thermostat-controlledpowervent.
Heatedairenteringthe atticwillactivate
the powervent.
WARNING:Ifthearea inwhichthe heater may be operatedissmallerthan thatdefinedasan unconfinedspace
or if thebuildingisof unusuallytight construction,provide adequatecombustionandventilationairbyoneof the
methods describedintheNationalFuelGasCode,ANSIZ223.1/NFPA54,Airfor Combustionand Ventilation,or
applicablelocalcodes.

7
CHECKGASTYPE
UseonlyPropane/LPgas.Ifyour
gas supplyisnotPropane/LP, donot
install heater.Calldealerwhereyou
boughtheater forpropertypeheater.
LOCATING HEATER
Thisheaterisdesigned for
mountingon awall,setonfloor,
away fromawall.
Purchase optionalfloormounting
standfromyourdealer.See
Accessories,page 16.
Forconvenience andefficiency,
installheater
l wherethereiseasy accessfor
operation,inspection,andservice
l incoldestpartofroom
INSTALLATION
Figure4-MountingClearances As
Viewed FromFrontOf Heater
FASTENING HEATERTOWALL
Mounting Bracket
Themountingbracketislocated
onback panelofheater(see
Figure5).It hasbeen taped there
forshipping.Removemounting
bracketfrombackpanel.
Figure5-Mounting Bracket
Location
NOTICE: Thisheaterisin-
tendedforuse as supplementalheat.
Usethisheater alongwithyour pri-
maryheating system.Donot install
thisheateras yourprimaryheat
source. If youhaveacentralheat-
ingsystem,youmayrunsystem s
circulatingblowerwhileusing
heater. Thiswill helpcirculatethe
heatthroughoutthehouse.Inthe
event ofapoweroutage,you can
use thisheateras yourprimary
heatsource.
WARNING: ElectricalGround-
ing Instructions
Thisapplianceisequippedwitha
three-prong(grounding) plugfor
your protection against shock
hazardand shouldbeplugged
directlyintoaproperlygrounded
three-prong receptacle
CAUTION: Ifyouinstallthe
heaterinahomegarage
l heaterpilotand burnermust
beatleast18inches above
floor.
l locateheaterwheremoving
vehiclewill not hit it.
CAUTION:Thisheatercreates
warmaircurrents. Thesecurrents
moveheattowall surfacesnext to
heater. Installingheater nextto
vinylor clothwall coverings or
operating heater whereimpurities
(suchas tobaccosmoke, aromatic
candles,cleaningfluids,oilor
kerosene lamps,etc.)intheair
existmaydiscolorwalls.
WARNING: Never install
theheater
l inabedroomor bathroom.
l inarecreationalvehicle.
l wherecurtains,furniture,
clothing, orother flammable
objectsarelessthan 36
inches fromthe front,top, or
sides of theheater.
l asafireplaceinsert.
l inhigh trafficareas.
l inwindyordraftyareas.
WARNING: Maintainthe
minimumclearances shown
inFigures 4, 6.If you can,
providegreater clearances
fromfloor,ceiling,andjoining
wall.
WARNING: Aqualified
servicepersonmustinstall
heater. Followalllocalcodes.

8
INSTALLATION
continued
MethodsForAttaching Mounting
BracketToWall
Onlyuse lastholeoneach end
ofmountingbrackettoattach
brackettowall.These twoholes
are16 inchesapartfromtheir
centers.Attach mounting
brackettowall onlyinoneoftwo
ways:
1.Attaching towall stud
2.Attaching towallanchor
AttachingtoWallAnchor: This
methodallowsyoutoattach
mountingbrackettohollowwalls
(wallareasbetween studs)orto
solidwalls(concreteor masonry).
Decide whichmethodbetter
suitsyourneeds.Eithermethod
willprovide asecureholdfor the
mountingbracket.
2.Markscrewlocations on
wall. (see Figure6)
Note: Onlymarklastholeon
each endofmountingbracket.
Insertmountingscrewsthrough
theseholesonly.
3.Removetapeand mounting
bracket fromwall.
MarkingScrewLocations
1.Tapemountingbrackettowall
whereheaterwillbe located. Make
suremountingbracketislevel.
Attaching toWall Stud Method
Forattachingmountingbracketto
wall studs
1. Drillholes at markedlocations
using 9/64"drillbit.
2. Placemounting bracket onto
wall.Line uplast holeoneach
end ofbracket withholes drilled
inwall.
3. Insert mounting screwsthrough
bracket and intowall studs.
4. Tightenscrewsuntil mounting
bracketisfirmlyfastenedto
wallstuds.
AttachingtoWall AnchorMethod
Forattachingmountingbracketto
hollowwalls(wall areasbetween
studs) or solidwalls(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
Figure7below.
Figure7-FoldingAnchor
3.Insert wall anchor(wings
first) intohole.Tapanchor
flushtowall.
4.Forthinwalls(1/2"orless),
insert redkeyintowall
anchor. Push redkeyto
"pop"openanchorwings
(see Figure8).
ModelML170EPCML170EHPC
Figure6- Mounting Bracket
Clearances
ModelML250EPCML250EHPC
Figure8-Popping Open Anchor
WingForThinWalls
IMPORTANT: Donot hammer
key! For thickwalls(over1/2"
thick) orsolidwalls,donotpop
openwings.
5.Place mounting bracket onto
wall. Lineuplastholeon
each endof bracket withwall
anchors.
6.Insert mounting screwsthrough
bracket andintowall anchors.
7.Tightenscrewsuntilmounting
bracketisfirmlyfastened towall.
PlacingHeateronMounting
Bracket
1. Locatetwohorizontalslotson
back panelofheater(see
Figure9).
2.Place heaterontomounting
bracket. Slide horizontalslots
ontostand-outtabs on
mounting bracket.
Note: Wall anchors, mounting
screwsareinhardware
package.The hardwarepackage
isprovided withheater.
Attaching toWall Stud: This
methodprovidesthe strongest
hold.Insertmountingscrews
throughmountingbracketand
intowallstuds.
WARNING: Maintain
minimumclearancesshownin
Figure6.If youcan,provide
greaterclearances fromfloor
and joining wall.
Figure9- Mounting HeaterOnto
Mounting Bracket
Floor
OnlyInsertMounting
ScrewsThrough
LastHoleOnEach
End
Adjoining Wall
Floor
OnlyInsertMounting
ScrewsThrough
LastHoleOnEach
End
Adjoining Wall

9
Installing BottomBracket
(See Figure10)
1. Installbottombrackettoheater
bottomwithtwoscrews.It may
bemoreconvienenttoremove
heater fromwallmounting
brackettoattach bottombracket
2.Placeheateronmounting
bracket
3.Locatetwobottommounting
holesonwall. Theseholes are
nearbottomon heater(see
Figure10).
4.Markscrewlocationsonwall.
5.Removeheaterfrommounting
bracket.
6. If installingbottommounting
screwsintoholloworsolidwall,
installwallanchors. Follow
steps1through 4underAttach
ing ToWall Anchor Method. If
Figure10 - Installing BottomBracket
CONNECTING TOGAS
SUPPLY
incominggas pressuretobetween
11and14inchesofwater.Ifyou
donotreduceincominggas
pressure,heaterregulatordamage
couldoccur. Install external
regulatorwiththeventpointing
downas showninFigure11.
Pointing theventdownprotectsit
fromfreezing rainorsleet.
Typical InletPipe Diameters
Allmodelsupto20,000BTU suse
3/8 orgreaterpipe;
Allmodels25,000BTU sandhigher,
use 1/2”orgreater pipe.
Installation mustincludeanequip-
mentshutoffvalve, union,and
plugged1/8"NPT tap. LocateNPT
tap withinreachfortest gauge hook
up. NPTtap must beupstreamfrom
heater(see Figure12).
installing bottommounting
screwintowallstud,drillholes
atmarkedlocationsusing9/64"
drill bit.
7.Replaceheaterontomounting
bracket.
8. Tightenbothscrewsuntilheater
isfirmlysecuredtowall. Donot
overtighten.
INSTALLATION
continued
Figure11- External Regulatorwith
Vent Pointing Down
INSTALLATION NEEDS
Beforeinstallingheater, makesure
youhavethe itemslisted below.
lpiping(checklocalcodes)
l sealant(resistanttoPropane/
LPgas)
l equipment shutoff valve*
l groundjoint union
l test gauge connection*
l sediment trap
l teejoint
l pipe wrench
*ACSA/AGAdesign-certified
equipment shutoff valve with1/8"
NPTtapisanacceptablealternative
totest gauge connection.
Theinstallermustsupplyan
externalregulator.The external
regulatorwill reduceincoming gas
pressure.You mustreduce
CAUTION: Never connect
heaterdirectlytothepropane/
LPsupply. Thisheaterrequires
an externalregulator (not
supplied).Install the external
regulatorbetweentheheater
andpropane/LPsupply.
CAUTION: Useonlynew,
blackironorsteelpipe.Inter-
nally-tinnedcopper tubingmay
be used incertainareas.
Checkyourlocalcodes.Use
pipeoflarge enoughdiameter
toallowproper gasvolumeto
heater.Ifpipeistoosmall,
WARNING:Donot over
tightengasconnections.
WARNING: Aqualified
service personmustconnect
heatertogas supply.Followall
localcodes.
WARNING: Thisappliance
requires a3/8"NPT(National
PipeThread)inletconnection
tothepressureregulator.
CAUTION: Usepipe joint
sealantthatisresistantto
liquidpetroleum(LP) gas.
CAUTION: Avoiddamage
toregulator. Holdgasregulator
withwrenchwhen connectingto
gaspiping and/orfittings.

10
*ACSA/AGAdesign-certifiedequipment shutoff valvewith1/8"NPT tap
isanacceptablealternativetotestgaugeconnection.Purchasetheoptional
CSA/AGAdesign-certified equipmentshutoffvalvefromyour dealer.
Figure12 -Gas Connection
r
CHECKINGGAS
CONNECTIONS
Pressure Testing GasSupply
Piping System
TestPressuresIn Excess Of
1/2PSIG (3.5KPa)
1.Disconnectappliancewithits
appliance maingasvalve
(controlvalve)andequipment
shutoff valvefromgassupply
pipingsystem. Pressures in
excess of1/2psigwilldamage
heaterregulator.
2. Capoffopen endofgas pipe
whereequipmentshutoffvalve
was connected.
3. Pressurizesupplypiping
systembyeitherusing com
pressedair oropening
propane/LPsupplytank valve.
4.Checkalljointsof gassupply
pipingsystem.Applymixtureof
liquidsoapandwatertogas
joints.Bubblesformingshow
aleak.
5. Correct all leaksat once.
6.Reconnectheaterandequipment
shutoff valvetogas supply. Check
reconnectedfittings forleaks.
TestPressures EqualToor
LessThan 1/2PSIG(3.5KPa)
1.Closeequipmentshutoff valve
(seeFigure13).
2.Pressurizesupplypipingsystem
byeitherusingcompressedair
oropeningpropane/LPsupply
tank valve.
3. Check alljointsfrompropane/LP
supplytank toequipmentshutoff
valve(see Figure14).Apply
mixtureofliquidsoap andwater
togas joints.Bubbles forming
showaleak.
4. Correct all leaksat once.
IMPORTANT: Installan equipment
shutoffvalveinan accessible
location.The equipmentshutoff
valveisforturning onor shutting
off the gastothe appliance.
fromgoing intoheatercontrols. If
sedimenttrapisnotinstalledoris
installed wrong,heatermay notrun
properly.
Applypipejoint sealant lightlyto
malethreads.Thiswill prevent
excess sealantfromgoingintopipe.
Excess sealantinpipe could
result incloggedheatervalves.
Stateof Massachusetts:Theinstalla-
tion mustbemadebyalicensed
plumberorgas fitterintheCommon-
wealthofMassachusetts.
Sellersofunventedpropane ornatural
gas-firedsupplementalroomheaters
shallprovide toeachpurchaseracopy
of 527 CMR30upon saleoftheunit.
IntheStateof Massachusetts,unvented
propane andnaturalgas-fired space
heatersshall beprohibitedinbed-
roomsand bathrooms.
Install sedimenttrapinsupplyline
asshowninFigure12.Locate
sedimenttrapwhereit iswithin
reachforcleaning.Locatesedi-
ment trapwheretrapped matter is
notlikelytofreeze.Asediment trap
trapsmoistureand contaminants.
Thiskeepsthem
WARNING: Testallgas
piping and connectionsforleaks
afterinstalling orservicing.
Correct allleaksat once.
WARNING: Neveruse an
openflametocheckforaleak.
Applyamixtureofliquidsoap
andwater toaljoints.Bubbles
forming showaleak.Correctall
leaksatonce.
CAUTION: Makesureexter-
nalregulatorhas beeninstalledbe-
tweengas supplyand heater. See
guidelinesunderConnectingtoGas
Supply.

11
Figure13-Equipment Shutoff Valve
CHECKINGGAS
CONNECTIONS
Continued
PressureTestingHeaterGas
Connections
1.Open equipmentshutoffvalve
(seeFigure13).
2.Openpropane/LPsupplytank
valve.
3.Makesurecontrolknob of
heaterisintheOFFposition.
4. Checkall jointsfromequipment
shutoffvalve tocontrolvalve
(see Figure14).Applymixture
of liquidsoapandwater togas
joints.Bubblesformingshow
aleak.
5. Correct allleaks atonce.
6.Lightheater (seeOperating
Heater, pages11and12). Check
therestofthe
internal jointsforleaks.
7. Turnoff heater(seepage12 ).
FORYOUR SAFETY
READBEFORELIGHTING
B.BEFORELIGHTINGsmellall
around theappliancearea for
gas.Besuretosmell nextto
the floorbecausesomegasis
heavierthan air and will settle
onthe floor .
WHATTODOIFYOU SMELLGAS
lDonot trytolight anyappliance.
lDonot touchanyelectricswitch;
do notuse anyphoneinyour
building.
lImmediatelycallyourgas
supplierfromaneighbor s
phone. Followthe gassupplier s
instructions.
lIfyoucannotreachyourgas
supplier, call thefire
department.
C. Use onlyyour handtopushon
button.Never use tools. Ifthe
button doesnot operate, don t
trytorepairit, callaqualified
service technicianorgas
supplier. Force orattempted
repairmayresult inafireor
explosion.
D.Donotuse thisapplianceif any
part has been underwater.
Immediatelycallaqualified
servicetechniciantoinspect
theapplianceandtoreplace
anypartofthecontrolsystem
and anygascontrolwhichhas
beenunder water.
Figure14 -Checking Gas
Connections
OPERATING
INSTRUCTION
WARNING: If youdonot
followthese instructionsexactly,a
fireorexplosion mayresult in
causing propertydamage,personal
injuryorloss of life.
For ML170EHPC,ML250EHPC
modelswithmanualoverridecontrol
systemheaters,makesurethe
ControlKnobisinELECTRIC
position.(See Figure15).
OPERATINGYOURHEATER
A. Thisapplianceisequippedwith
an ignition devicewhichauto
maticallylightsthe pilot. Donot
try tolightthe pilotbyhand.
1. STOP!Readthesafetyinformation
abovebeforelighting.
2.Disconnect orturnoffall electric
power toheater.
3.Thisapplianceisequipped with
anignition device which automati-
callylightsthepilot.Donot trytolight
thepilotbyhand.
4.Waitfive(5)minutes toclearout any
gas.Then smell forgas,including
nearthefloor. If you smellgas,
STOP! Follow “B”inthesafetyinfor-
mation above.Ifyoudon tsmell
gas, gotonext step.
5.Plug intoaproperlygroundedthree-
prong receptacle,setON/OFF
switch on, you will hear ahigh pitch
sound thatindicates theburneris
readytobeoperated.
6.MakesureControlKnob isinELEC-
TRICposition.
7.Press IGN/OFF button anelectric
sparkwillignitethepilot.
8.PressBURNER buttonfor desired
burneroperation.
AUTO:Burner will automaticallyturn
onorofftodesiredtemperature
setting,pressor fordesired
temperaturesetting.
MAN:Burneroperates continuously.
OFF:Themainburnerwillshutoff.
9.Ifthe appliancewillnot operate,
followtheinstructions “ToTurnOff
Gas ToAppliance”andcall your
service technicianorgassupplier.
Note:Thethermostatsensingbulb
measures the temperatureofairnear
theheatercabinet. Thismay not
always agreewithroomtemperature
(depending onhousing construction,
installation location, roomsize,air
temperatures,etc.)Frequentuse of
your heaterwill letyou determine
yourowncomfort levels.
Clock setting:Press CLOCKbutton
toselectitem(hour,minute). The se-
lected itemwillflash.Pressor
tochangetocorrecttime(hour,
minute); PressCLOCK button again,
tosetclock.
SETTINGCLOCK

12
1.PresstheIGN/OFF button on the
touchpad.
2.Set theON/OFFswitch toOFF
positionontoppanel.
1. STOP! Read thesafetyinformation
onpage11beforelighting.
IFNO ELECTRICPOWER IS
AVAILABLE,HEATERCAN BE OPER-
ATEDMANUALLY
If themanualcontrolknobpointsto
ELECTRICposition,pressinthe
controlknob andturncounter clock-
wise toOFFposition.
4.Waitfive(5)minutes toclearany
gas. Thensmell forgas,including
nearthe floor. Ifyousmell gas,
STOP!Follow “B”inthesafetyin-
formation on page11.Ifyou do not
smellgas,gotothenextstep.
5.Push ingascontrolknobslightlyand
turncounterclockwisetoPILOT/
IGN and depress forfive(5)
seconds.NOTE:The firsttimethe
heaterisoperatedafterconnecting
thegas supply,thecontrolknob
shouldbedepressed forabout thirty
(30)seconds.Thiswillallowairto
exit thegas system.
2. Check thatgassupplytothe
3.Removeroundaccess door of
right sidepanel.Pushincontrol
knobslightlyandturnclockwise
totheOFFposition.
heaterison.
6. Withcontrolknobpressed, push
andreleaseignitor button. This
willlight thepilot. Ifneeded,keep
pressing ignitorbutton untilpilot
lights.
7.Keep controlknob depressedfor
ten(10)seconds after lighting
pilot.If pilotgoesout,repeatsteps
5,6and 7.
8.Rotatecounterclockwiseto
ONpositiontolight burner.Donot
operatebetween locked positions.
NOTE: Wait one minutetolight
againaftershutting off heater.
MANUALOPERATING
INSTRUCTIONS
TOTURN OFF GAS
TO HEATER
MAN: Bloweroperates
OPERATINGBLOWER
PressBLOWERbutton,fordesired
burneroperation.
OFF: Blowerisoff.
AUTO:Blower willcomeon
severalminutes afterburner
comes onandwillgooff several
minutes afterburnergoesoff.
LOCKINGTOUCH-PAD
(childproof)
A.Key-presslocking: Press LOCK
buttonontheoperatingpanel,
asymbolwill appearonthe
LCD.
OPERATINGYOURHEATER
continued
Autoon: Withburner off,press
TIMER button. Thenpress or to
change tothescheduled time,then
presstheTIMERbuttonagain, the
TIMERstartstimingand theTIMER
will flash.Burnerwill automatically
comeonatthesettime.
SETTINGTIMER
B.Key-pressunlocking: Press,
thenpressLOCKbuttontounlock.
AUTOOFF: Withburner operating,
pressTIMERbutton.Thenpress or
tochangetothescheduled time,
thenpresstheTIMERbutton again,
theTIMERstartstimingandthe
TIMERwillflash. Burner willauto-
maticallyshutoffatthe desiredtime.
Weprovidethe manualcontrolsys-
temjust incase ofpowershortage.
InstallbatteryforManual Ignitor:
1.Unscrewthe ignitor cap.
2.Insert aAAAtypebatterywithits
anode(“+”)pointingout.
3.Screwthe ignitorbackcap.
Note:Werecommend that thebattery
betakenoutofthe ignitorwhenthe
powersupplygetsright.
ControlKnob
IgnitorButton

13
Figure15- Manual Control
Pushingascontrolknob slightly
and turnclockwise toOFF.
Donot useforce.NOTE:Wait one
(1) minutewithcontrolknobin
OFFposition beforeoperating
heater.
9.When electricpowerisavailable
andelectronicoperationis
desired, turnclockwise to
OFFpositionfor oneminute. Then
pressdownknobandrotate
clockwisetoELECTRIC
position. Donot operatebetween
locked positions.
1.Remove lowerfrontpanel.
2.Followsteps1through5
under ManualOperating
Instructionson page12.
3.Withcontrolknobpressedin,
strikematch.Holdmatch
topilotuntilpilot lights.
MANUALLIGHTING
PROCEDURE
INSPECTINGBURNER
Check pilotflamepatternand
burnerflamepatternoften.
PILOTFLAMEPATTERN
Figure16showsacorrectpilot
flamepattern.Figure16showsan
incorrectpilotflamepattern.The
incorrectpilot flameisnottouch-
ingthermocouple.Thiswillcause
thethermocoupletocool.When
the thermocouplecools,thehealer
will shutdown.If pilotflamepattern
isincorrect, as showninFigure17.
l turnheateroff(see page11)
l see Troubleshooting,pages 17
through 19.
Figure17- Incorrect Pilot Flame
Pattern
BURNERFLAMEPATTERN
Figure17 showsacorrect burner
flamepattern.Figure19 showsan
incorrect burner flamepattern.If
burner flamepatternisincorrect,
as showninFigure19.
l turnheater off(seepage 11).
lsee Troubleshooting. pages 17
through19.
Figure19 - IncorrectBurner
FlamePattern
Figure18 - Correct Burner
FlamePattern
MANUALOPERATING
INSTRUCTIONS
continued
4.Keepcontrolknob pressedin
for30 secondsafterlighting
pilot.
5.Rotatecounterclockwise to
ON position tolight burner.Do
not operatebetweenlooked
positions.
4.Replacelower front panel
Figure16 - CorrectPilot Flame
Pattern
TO TURN OFFGASTO
APPLIANCE
(MatchLight)

14
CLEANINGAND
MAINTENANCE
DISCONNECT WIRINGOR CONTROL
MODULE
1.Removetwoscrewsfromthelower
frontpanel , pullthelowerfront panel
forwardthendowntakeout thermostat
sensingbulbfromtheclip,thendisco-
nnect the wiresfromtocontrol
module.
Note:Donotconfusethe markon
each wire.
2.Remove twoscrewsand hex nuts,
Figure20 ControlModel Access
2.Markortageachwireremoved for
itsexact reconnection. Removethe
fourscrewsfromthefan,when
installing, reversethesteps above.
(SeeFigures21,23and24)
Figure21-Fan Access
CLEANINGODS/PILOTANDBURNER
lUse avacuumcleaner,pressurized
airtoclean.
CLEANING BURNERAND PILOT
AIRINLETHOLE
Werecommendthat youclean the
unit every2,500hoursofoperation
oreverythreemonths.Wealso
recommend thatyoukeeptheburner
tubeand pilotassemblycleanand
free ofdustand dirt.
Tocleanthese partswerecommend
using compressed airnogreater
than30PSl. Yourlocalcomputer
store, hardwarestore,or homecenter
maycarrycompressedairinacan.
Youcan useavacuumcleaner inthe
blowposition.Ifusingcompressed
airinacan, pleasefollowthedirec-
tionson thecan.Ifyoudon tfollow
directionson thecan, you coulddam-
age thepilotassembly.
1. Shut off the unit, including the
pilot. Allowtheunittocoolfor
at leastthirtyminutes.
2.Inspectburner,pilotfordust
and dirt.
3.Blowairthroughtheports/slots
andholes intheburner.
Cleanthepilotassemblyalso. A
yellowtiponthepilot flameindi-
catesdustand dirtinthe pilot
assembly.Thereisasmall pilotair
inletholeabout twoinchesfrom
wherethe pilot flamecomesout of
the pilotassembly(seeFigure22).
Withthe unitoff, lightlyblowair
throughthe airinlethole.Youmay
blowthroughadrinkingstrawif
compressedairisnotavailable.
DISCONNECTFAN
1.Removescrewsfromthefan
bracketpanel,pull thefan bracket
panelout toremove. Disconnect
twowires oftemperaturesensor.
CAUTION:Labelall wiresprior to
WARNING:
WARNING: Failuretokeep
the primaryairopening(s)ofthe
burner(s) cleanmayresultinsoot
causingpropertydamage.
takeoutthecontrolmodule.When
installing , reverse thestepsabove.
(SeeFigures20, 23and24)
CLEANING HEATERCABINET
AirPassageways
lUseavacuumcleaner or
pressurizedairtoclean.
Exterior
lUseasoft clothdampenedwith
amildsoapand water mixture.
Wipethecabinettoremove dust.
Figure22- Pilot Inlet AirHole
disconnectionwhen servicing
controls.Wiring errorscancause
improperand dangerousoperation.
Verifyproperoperationafter
servicing.
Disconnect
powerbeforeattemptingany
maintenanceorcleaning toreduce
theriskoffire, electricshockor
personalinjury.Turnoffheaterand
let cool beforecleaning.
CAUTION: You must keep
control areas, burner,andcirculat-
ingairpassagewaysof heater
clean.Inspect these areasof
heater beforeeachuse.Have
heaterInspected yearlybya
qualifiedservice person.Heater
may need morefrequentcleaning
due toexcessivelintfromcarpeting,
beddingmaterial,pethair, etc.

15
Figure24- DoubleControlSystemsDiagram
(ModelML170EPCML250EPC)
(ModelML170EHPC ML250EHPC)
Figure23-Touchpad controlSystemDiagram

16
Note: Dimensionslisted areoutermostpointson the heater
(includesgrill).
*Forpurposesofinputadjustment.
ML170EPC(ML170EHPC)
17,000
Propane/LPOnly
Automatic(Automatic/Electronic)
120 V
20 W
10"W.C
14"
11"
23 5/8×19 5/8×9
271/2×22×101/8
33(34)
38(39)
REPLACEMENTPARTS
Useonlyoriginalreplacementparts.
Thiswillprotectyourwarranty
coveragefor partsreplacedunder
warranty.
PARTSNOTUNDER
WARRANTY
Contactauthorizeddealersofthis
product. If theycan t supplyoriginal
replacement part(s), call PRO-COM s
phonenumber(877)886-5989.
TECHNICALSERVICE
You mayhavefurtherquestions
aboutinstallation,operation,or
troubleshooting.Ifso,contact
PRO-COM Sphonenumber(877)
886-5989.
FLOORMOUNTINGSTAND
Forlocatingheateronthe floor,
awayfromawall.Completeinstalla-
tioninstructionsprovided withfloor
mounting base stand.
BASESTAND MODEL:PF0920C
ACCESSORIES
Purchase these heateraccesso-
riesfromyourlocaldealer. If they
l yourname
l your address
l modeland serialnumbersof
your heater
l howheater wasmalfunctioning
l type of gasused (Propane/LPor
Naturalgas)
l purchase date
l warrantycard
Usually, wewillask youtoreturnthe
defectivepart tothefactory.
If they areunabletosupplyoriginal
replacementpart(s),callthe number
onthefrontofmanual.When contact-
ingyourdealerorPRO-COM,have
ready:
PARTS UNDERWARRANTY
Contactauthorizeddealerfrom
whomyoupurchased thisproduct.
SPECIFICATIONS
BTU/Hr
GasType
Ignition
Volts
Watts
ManifoldPressure
InletGas Pressure(inches of
water)
Maximum
Minimum
Dimensions,Inches (HxWxD)
Heater
Carton
Weight (pounds)
Heater
Shipping
cannotsupplythese accessories,
contactPRO-COMforinformation.You
can also writetothe address
listedonthefrontofthismanual.
ML250EPC(ML250EHPC)
25,000
Propane/LPOnly
Automatic(Automatic/Electronic)
120 V
27W
10"W.C.
14"
11"
235/8×271/16×9
27 1/2×297/16×111/8
42(43)
55(56)

17
TROUBLESHOOTING
POSSIBLECAUSE
1. Nopowertoheater
2.ON/offswitch notON
3.Wireisdamagedorloose
4. Pilotelectrodepositionisnotcorrect
5. Touchpad cableisnot connected
6.Systemhalt
1.Gassupplyturned off orequipment
shut off valveclosed
2. Air ingaslines wheninstalled
3. Depletedgassupply
4. ODS/pilotisclogged
5.Gasinletsupplypressurenot correct
6.Wireisdamagedorloosen
7. Pilotelectrudepositionisnotcorrect
8.Gas valveorregulatorisdamage
1. Equipmentshutoff valveisnot
fullyopen
2.Thermocoupleconnection
looseatcontrolmodule
3Lowgaspressure
4. DirtorpartiallycloggedODS/pilot
5.Thermocoupledamaged
6.Gasvalveorregulatordamaged
WARNING: If you smell gas
l Shut offgassupply.
l Donottrytolight anyappliance.
l Donottouchanyelectricalswitch;do not useanyphone inyourbuilding.
l Immediatelycal lyourgassupplierfromaneighbor sphone. Followthe gas
supplier sinstructions.
l Ifyoucannotreachyourgassupplier, callthefiredepartment.
IMPORTANT:Operatingheaterwhereimpuritiesinairexistmaycreateodors.
Cleaning supplies,paint,paintremover, cigarettesmoke,cementsandglues, new
carpetortextiles, etc.,createfumes.Thesefumesmaymixwithcombustion air
and createodors.
Warning : Makesurethat power
isturned offbeforeproceeding.
CAUTION:Neveruseawire,
needle, orsimilarobject toclean
ODS/pilot.Thiscan damage
ODS/pilotunit.
OBSERVED PROBLEM
When ignitionbutton ispressed,
thereisnosparkat ODS/pilot.
When IGN/OFF ispressed
Sparkat ODS/pilotbut noignition.
ODS/pilothas flame,butcontinues
tospark.
WARNING: Turnoff and let coolbe-
foreservicing.Onlyaqualifiedser-
vice personshouldservice andre-
pairheater.
REMEDY
1. Checkthe electricpower
2.TurnON/OFFswicthon
3.Check thewirefordamageand
makesureconnection istight
4.ReplacePilot
5. Reconnecttouch padcable
6.Placethecontrolknobof
manualoverrideor OFFposition
forat least1minute,thentrun to
ELECTRICposition
1.Turnongassupplyor open
equipmentshutoff valve
2.Press ignitorbutton againuntil
airisremoved
3.Contract localgascompany
4.CleanODS/pilot(see cleaning
and Maintenance, Page 12)or
replaceODS/pilot assembly
5.Havequalifiedservicetechnician
checkinlet pressure
6.Checkthe wirefor damage and
makesureconnectionistight
7.ReplacePilot
8.Contactdealeror PRO-COM
1.Fullyopenequipment shutoff
valve
2.Checkthat connectorssecure
onmodule
3.Contactlocalnaturalgas company
4.CleanODS/pilot(see Cleaningand
Maintenance, Page13) orreplace
ODS/pilot assembly
5.Replacethermocouple
6.Contactdealeror PRO-COM

18
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
ODS/pilot hasflame,butburner(s)
doesnotlight
Delayedignitionofburner(s)
Burner backfiring duringcombustion
BurnerPlaque(s)doesnotglow
Slight smokeorodor during
initialoperation
Heaterproducesaclicking/ticking
noisejustafter burnerislit or
shut off
Whitepowderresidueforming
withinburner boxon adjacent
wallsorfurniture
POSSIBLECAUSE
1.Burnerinjector isclogged
2.Inletgaspressureistoolow
3. Thermocoupleleads discon
nectedorimproperlyconnected
4.Batteriesweak
1. Manifoldpressureistoolow.
2.Burner injector isclogged
1. Burnerinjector isclogged or
damaged
2. Burnerisdamaged.
3. Excessivesupplypressure
damaged regulator
1.Plaquedamaged
2.Inletgaspressureistoo low
1.Residues frommanufacturing
processes
1. Metalexpandingwhileheating or
contracting whilecooling
1. Heatedvaporsfromfurniture
polish,wax,carpetcleaners,
etc.turnintowhitepowder
residue
REMEDY
1.Cleanburnerinjector (see Cleaning
andMaintenance,Page14)or
replaceburner injector
2. ContactlocalPropane/LPgas company
3.Reconnectleads (Seewiring
diagram)
4.Replacebatteries
1. ContactlocalPropane/LPgascompany.
2.Cleanburner(see Cleaningand
Maintenance,Page14)orreplace
burnerinjector
1.Clean burnerinjector(see Cleaning
and Maintenance, Page14)or
replaceburner injector(s)
2. Replaceburner
3.Replace gasregulator
1. Replaceburner
2. Contactlocalpropane/LPgas
company
1.Problemwillstopafter afewhours
ofoperation
1.Thisiscommonwithmost
heaters. If noiseisexcessive,
contactqualifiedserviceperson
1.Turnheateroffwhenusing furniture
polish,wax,carpet cleaner, or
similar products

19
TROUBLESHOOTING
Continued
REMEDY
1. Ventilateroom.Stopusing odor
causingproductswhileheater
isrunning
2.Locateandcorrectall leaks(see
Checking GasConnections,
Page10)
1. Open windowand/ordoor for,
ventilation
2. Contact localpropane/LPgas
company
3.Clean ODS/pilot(seeCleaning
Page14)
1. Locateandcorrectallleaks(see
CheckingGasConnections,
Page10)
1. Removeforeign matter.
2.Locateandcorrect all leaks
(seeCheckingGas
Connections, Page10)
1.Refer toAirforCombustion and
Ventilation requirements, Page
5
POSSIBLECAUSE
1. Heater isburning vaporsfrom
paint, hairspray, glues,etc.
(SeeIMPORTANTstatement
at beginningof troubleshooting)
2. Gas leak.See WARNING
Statement at beginning of
troubleshooting
1.Notenoughfreshairisavailable.
2.Lowlinepressure
3.ODS/pilotispartiallyclogged
1.Gasleak. See WARNING
Statement atbeginning of
trouble
shooting
1. Foreignmatterbetweencontrol
valveandburner
2.GasleakSee WARNING
Statementatbegining of
troubleshooting
1.Notenough combustion/
ventilation air
OBSERVED PROBLEM
Heaterproducesunwantedodors
Heater shutsoffinuse(ODS
operates)
Gasodorexistsevenwhenheateris
shut off
Gasodor during combustion
Moisture/condensation onwindows
NOTE:BEFORE YOU SWITCH TO “ELECTRIC”CONTROLLEVELFROMMANUALCONTROL,YOU NEEDTO
TURN THEKNOBTO “OFF”LEVELFIRSTAND WAITFOR ONEMINUTE,THEN TURNTHE KNOBTO “ELECTRIC”.
INCASEOF “ELECTRONIC”CONTROLLEVELDOES NOTWORK,PLEASETURN THE CONTROLKNOBCOUN-
TERCLOCKWISETO “OFF”LEVELAND WAITFOR ONEMINUTE.

20
ILLUSTRATED
PARTSBREAKDOWN
ML170EPC