Suburban NT-12S User manual

SUBURBAN MANUFACTURINGCOMPANY
676 BroadwayStreet
Dayton. Tennessee
37321
a subsldiar~ 01 AIRXCEL, Inc.
INSTALLATION MANUAL
FOR MODELS
NT-12s NT-16s NT20S
CERTIFIED
The design of these furnaces hasbeencertified for installation in recreational vehicles only. In order for these furnaces to operate inconformity
with generally accepted safety regulations, the installation instructions outlined
in this book must befollowed. Failure to comply with the
installation instructions will void any responsibility of Suburban ManufacturingCompany. Your furnace was inspected before it left the factory.
Ifanypartsarefound to bedamageddonot installthe furnace. Any damages should bereported tothe transportation companyimmediately and
the appropriate claims filed.
--
~WARNING!Improper installation, adjustment, alteration, service or maintenance can1
cause property damage, personal injury or loss of life. Refer to the installation
instructionsand/or owners manual provided with this appliance. Installation andservice
must be performed by a qualified installer, service agency or the gas supplier.
INSTALLATION INSTRUCTIONS
WARNING! Installationofthisappliancemustbemadeinaccordancewith
the written instructionsprovidedinthis manual. Noagent, representative
or employse of Suburban or other person has the authority to change,
modify or waive any provision of the instructions contained in this
manual.
air be provided to insure normal heating and operation of the furnace. Also.
adequateclearances mustbe maintained aroundthe furnace cabinet so that the
unitwill be accessible for servicing. Failureto provide minimum returnair as well
as an adequate opening for furnace removal voids the warranty.
Inthe USA,theinstallationmustconform with localbuildingcodes. Inthe absence
of local building codes, refer to the latest edition of:
CAUTION: If possible, do not install the furnace to where the vent can be
covered or obstructed when any door onthe trailer isopened. If this isnot 1-Standard for RecreationalVehicles ANSl A-119.2/NFPA501C
oossible. then the travel of the door must be restricted inorder to ~r0vide 2-National Fuel Code ANSl 2223.1.
6" minimum clearance between the furnace vent and anydoor whenever
the door isopen.
NOTE: The exhaust temperature of this furnace could discolor or warp some
materials. You should verify that the material used on the coach door, panel, or
cover will not discolor or warp from the exhaust temperature whenever any door,
panel, or cover is in the open position.
CAUTION: Due to the differences in vinyl siding, this appliance should not
beinstalledonvinylsidingwithout first consulting with the manufacturerof
the siding or cutting the siding away from the area around the appliance
vent.
CAUTION: In any installation in which the vent of this appliance can be
covereddue to theconstructionof the RV or some special feature of the RV
such as slide out, pop-up, etc. always insure that the appliance cannot be
operated by setting the thermostat to the positive "OFF" position and
shutting off all electrical and gas supply to the appliance. Never operate
furnace with vent covered.
These furnaces must beinstalled and vented as described inthis manualso that
the negative pressure created by the air circulating (return air) fan cannot affect
the combustion air intake or venting of any other appliance. It is imperative that
the products of combus!ion be properly vented to the atmosphere and that all
coinbustion air suppliedto burner be drawn from the outside atmosphere. (See
"Installing \lent Asselnbly".)
IMPORTANT: If this furnace is to be connected to a common duct system also
serving a cooling unit,a manualor airtomatic damper is required to prevent any
cold conditioned air fromcirculating back into the furnace. Cold air passingover
the furnacecombustionchamberduring theoperationof the coolingunitcanresult
in the forma!ion of condensation inside the furnace combustion chamber. This
condensa:ion may promote corrosion and premature failure of the combustion
chamber.
NOTE: These furnaccs shall be instalied so the electrical components are
protected from water.
These furnaces will accommodate an installation depth from 23 318" minimum
(with standard vent tubes), tc 30 118" maximum (with optional intake extension
tubes). (SeeFigure 1.)
Please adhere strictlyto the installation instructions to insure proper installation
and safeoperation, as well as adequate clearances for accessibility.
These furnaces are certified for use with propanelLP gas only. Gas supply
pressure for purposes of input adjustment:
Gas Minimum Maximum
PropaneILP 11"W.C.' 13" W.C.
'Water column Returnair
An opening must beprovidedinthe interiorcabinetry of the coachdirectlyinfront
of the furnace. The operiing must allow for free, unobstructed removal of the
furnace. This openingmay be usedas a means of providing circulatingreturn air
to thefurnace.Otheropenings maybe used aswell. The minimumreturnairto the
furnace musttotal
55 squareinches free area. It isimportant that sufficient return
The furnace must beelectrically grounded inaccordance withthe latest editionof
the National Electrical Code ANSIINFPA No.70.The installation of the furnace
shall be in accordance with any applicable local codes and regulations.
InCanada, the furnace must be installed in accordance with:
1-StandardCANICSA-Z240.6.2-M86ElectricalRequirementsfor Recreational
Vehicles.
3-Standard CANICSA-Z240.4.2-M86 Installation Requirements for Propane
Appliances and Equipment in Recreational Vehicles.
4-CANICGA-B149 Installation Codes
5-Any applicable local codes and regulations.
TO INSTALLTHE FURNACE
1. Locate the furnace near lengthwise center of the coach Do not install the
furnace with the vent facing toward the forward eiid of the coach.
2. Select a location for installation out of the way of wires, pipes, etc. that might
interfere with installation. Adhere to the following minimum clearances from the
furnace cabinet to combustible construction.
NT-12 NT-16 NT-20s
Front 318" Floor 0" Front 1" Floor 0"
Sides 1" Top 1" Sides 1" Top 1 "
Back 0" Back 0
NOTE: Side and top clearances may be 0 forthrough the wall installationsup to
a maximum of 2 112" wall thickness (See Figure3.)
3. When an appliance is installed directly oncarpeting, tile or other combustible
material other than wood flooring, the appliance shall be installed on a metal or
wood panel extending the lull width and depth of the appliance. If preferred,the
carpeting, tile or comb~~stiblematerials, other than wood maybecut awaythefull
length and depth of the appliance plus the appliance minimum clearances to
combustibles.
4. Determine
"X dimension as shown in Figure 1or 2 depending on model.
5. Determine
"Y" dimension as shown in Figure 1or 2.
6.
If X-Y islessthan 22 314for Models NT-12 or NT-16. or 23 318" for ModelNT-
20, then an opening 9 518'' x 9 318" must be cut through the inner wall only. DO
NOT CUT THROUGHCOACHSKIN. (SeeFigure3.) Next,locate the centerline
31the exhaust and intake tube. Cut two (2) 2 114" diameter holes throughouter
skin as shown inFigure 5.
NOTE: Whenever the furnace cabinet is installed through the outside wall, the
return air louvers on the furnace cabinet must not be blocked. The maximum
projection of the furnace cabinet intothe wall is 2 112". (See Figure3.)
NOTE: Furnace cabinet approved for
0 clearance to combustible materials rear
2 112" of furnace cabinet.
7. If X-Y is23 314' or greater for Model NT-12or NT-16,or 23 318" or greater for
Model NT-20,two methods may be used to install the furnace. They are:
a. Cut a 4 x 7 112" opening through combustible wall as shown in Figure 4.
DO NOT CUT THROUGH TRAILER SKIN. Next, locate the center line of the
exhaust and intake tube. Cut two (2) 2 114" diameter holes through trailer skin.
(See Figure 5.)
Form No. 2467-C

b. If you do not wish to cut the 4 x 7 112" opening, locate the center line of the INSTALLING VENT
exhaust and intake tube as shown inFigure
5 Next,cut two (2)2 314 diameter
t he vent outlet must be installed so it is in the same atmospheric pressure zone
holesthroughtrailer skin and also the combustible wall ofthe traileras illustrated as thecombustion air intake.The exhaustand intaketubes mustbeinstalledfrom
in Figure
7. Care must be takenwhen locating the center line of the exhaustand the outside, pass through the RV skin and slide onto the furnace exhaust and
intake tube as well as when cuttina the holes in order to assure a 318" clearance
intakp
around the exhaust and intake tubks to combustible materials.
8. Ref?rto thechart inFigure 1or 2 (depending onthe furnace model) andselect
the range for which the
"X" dimension falls. The intake tube length directly to the
leftofthe selected range isthe length required NOTE:The
7 314 lengthexha~~st
tube assemblywill accommodate all approved installationdepths -onlythe intake
tubemust beorderedwhen needed. Under nocircumstances shouldthestandard
3" intake tube be used when
"X dimension is greater than 25" for Model NT-12
or NT-16,or greater than 25 518" for Model NT-20
9. Secure furnaceto the floor using the two holes provided in the front area olthe
furnace cabinet (See Figure3 or 4.)
CONNECTING GAS SUPPLY
Connect the gas fitting (318" NPT to 318" Fiare) to the furnace at the manifold
provided on the right side of the furnace (Figure 3 or 4). Ail rnalejoints should be
treated withasealingcompound resistanttu the action of liquefiedpetroleunlgas.
NOTE Be sure all male joints have been treated with a sealing compound
resistant to the action of liquefied petroleum (LP)gas.
NOTE The appliance must be disconnected from the gas supply piping system
durlngany pressuretesting of that system at test pressure inexcessof 112 PSIG.
The appliance must be isolated from the gas supply piping during any pressure
testing of the gas supplypipingsystem at test pressure equal to, or lessthan 112
PSIG
Inorder to maintain a check on gas supply pressure to the furnace, Suburban
advises the installer to provide a 118" NPT plug tap for test gauge connection
immediately upstream olthe gas supply connection to the furnace.
After the furnace has been connected to the gas supply, all joints must be
checkedfor leaks.
WARNING! Nevercheck for leakswith an openflame. Turnonthegasand
applysoapy water toall joints to see if bubbles are formed.
CONNECTING ELECTRICALSUPPLY
CAUTION! Thisfurnace isdesigned for negative ground 12 volt DC system
only. Do not attempt to alter the furnace for a positive ground system or
connect thefurnace directlyto115volts AC, Damagetofurnacecomponent
parts will occur.
Be sure all wiring to the furnace is of heavy enough gauge to keep the voltage
drop through it to a minimum. No. 12gauge wire is recommended If any of the
original wire that is supplied with the appl~ancemust be replace, it must be
replaced with Type 105°C or its equivalent.
Connect the power supply to the red and yellow wires in the right side of the
furnace.The wires arecolor coded, redfor positive
(+) andyellowfor negative (-).
This polarity must be observed so the furnace motor will run with the proper
direction of rotation to insure correct air delivery. (Seewiring diagram.)
If the furnace power supply is to be from a convertor, we recommend that the
convertor system used to power the furnace bewired
iri parallel with the battery.
This will serve two purposes:
1. Provide a constant voltage supplyto the furnace.
2. Filter any A.C. spikes or volt surges.
NOTE: Furnace Models NT-12S, NT-16s and NT-20s are equipped with an
electric ignitor device that has an energyconsumption of .1 amp at 12volts DC.
CONNECTING DUCTS TO FURNACE
The following duct requirements must be followed in order to assure proper
operation of the furnace.
A. Maintain a minimum of 25 square inches unrestricted duct area throughout
entire duct system including through register (Minimum 2 ducts
4 diameter.)
NOTE: Ducts terminating in a dead air space (like holding tank compartments)
with no means for return air recirculation should not be counted in the required
duct area. Also, ducts
2 in diameter or smaller should not be counted in the
required duct area.
El. Maketl~eductconnections at the furnacecabinet tight. Loose connectionswill
resultinoverheatingof thefurnacecomponentpartsanda reductioninthe heated
air flow through the duct system.
C. Avoid making sharp turns in the duct system. Sharp turns will increase the
static pressure inthe plenum area and couldcause the lurnace to cycle.
D. Avoid making a lot of turns inthe duct system. The straighter the duct System
the better the performance of the furnace.
E. Maintainaminimumof 1
" clearancewhereducts passthroughanycombustible
construction; such as, coach cabinetry. (See Figure 4A) NOTE: UL listed duct
materials can be 0" clearance.
F. Do not install air boosters in the duct system. Such devices will cause the
furnace to cycle on limit and to have erratic sail switch operation.
NOTE After installationof thefurnaceandduct systemiscompieted,adjustments
must be made to obtain a temperature rise within the range specified on the
Rating Plate.
The efficiency rating of the furnace is a product thermal efficiency rating
determined under continuous operating conditions independent of any installed
system. CONNECTING THERMOSTAT
Locatethe roomthermostat approximately4 112 feet above the floor onaninside
bulkhead where it is not affected by heat from any source except room air.
Connectthermostatwiresto the bluewires leavingpowersupplyplugonrightside
of furnace. (See wirlng diagram.)
....-.~-.
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WARNING! Donotalter the vent assembly suppliedwiththislurnace. Any
modificationswill resultinimproperinstallation whichcouldcause unsafe
furnace operation.
CAUTION! Combustionair must notbedrawnfromthe livingarea. All airfor
combustion mustbedrawn
fromthe outside atmosphere.Allexhaustgases
mustbe ventedtothe outside atmosphere
- neverinsidethe RV. Therefore,
itisessential to insure that the vent cap and tube assemblies are properly
installed.
1. Applycaulkingto RVskin behindvent capas showninFigure
7. Applycaulking
generously around perimeter of vent cap and across center as shown
2. Insert intake tube through RV skin and slide it onto the furnace intake (See
Figure 1
.) Minimum tube overlap of 112" is required
3. Insert vent cap exhaust tube through RV skin and slide it onto the furnace
exhaust (See Figure 1
.) Minimum tube overlap of 1 114 is required
4. Attach vent cap assembly to outer skin of RV with the six (6) screws provided
Do not install vent assembly upside down. The words "Suburban" and "Dayton.
Tenn." must be right side up.
PREVENTIVE MAINTENANCE
WARNING! Ifthe user of this appliancefailstomaintainitinthe condition
inwhich it was shipped from the factory or if the appliance is not used
solely for its intended purpose or if appliance is not maintained in
accordance with the instructions in this manual, then the risk of a fire
and/or the production of carbon monoxide exists which can cause
CAUTION: Labelall
wiresbeforedisconnectingforservicing. Properpolarity
mustbeobserved sothefurnace motor will runwiththe proper directionof
rotationto insurecorrect air delivery (See Wiring Diagram.)
CAUTION: Label all wires prior todisconnection when servicingcontrols
Wiring errors cancause improper and dangerous furnace operation.
Always verify proper operation of furnace after servicing
Your furnace should be inspected by a qualified service agency yearly before
turning the furnace on Particularattention should begiven to the following items
1. lnspect furnace installation andvent termination to besure furnace is properiy
secured in place (See Installation Instructions), that vent terminates to the
atmosphere,andthat venttubesoverlapproperly.(SeeInstallingVentAssembly.)
2. lnspect chamber and venting to assure that these components are physically
sound, without holes or excessive corrosion and that the installation andlor
reinstallationisinaccordancewithSuburban'sInstallationInstructions.(Reierence
:
installation manual supplied with furnace.)
WARNING! It isimperative that the products of combustion
be properly
vented to atmosphere and that all combustion air supplied to burner be
drawn from outside atmosphere.
3. Check the base on which furnace is mounted. Be sure it is physicallysound.
void of any sagging, deterioration, etc
4. lnspect furnace, the venting, ducting and thegas pipingto furnacefor obvious
signs of deterioration. Correct any defects at oncs.
5. lnspect combustion chamber for restrictions in exhaust or intake It is
imperative that the flow of intake combustion air and the flow of exhaust gases
being expelled to the otitside atmosphere not be obstructed. Any soot or loose
debris should be blown out using compressed air. (See Figure 10.)
6. lnspect all gaskets. If any gaskets show signs of leakage of deterioration.
replace them. Safe operation of the furnace depends on ail gaskets being tight.
7. lnspect return air inlet openings to the fu:nace Remove any restrictions to
assure adequate air flow.
You, as the ownerluser, should inspect the furnace monthly during the
heating season (or presence of soot on vent. Operating the furnace under this
condition could lead to serious propertydamage, personal injuryor loss of life 11
soot is observed on the vent, immediately shut furnace down and contact a
qualified service agency.
Listed below are several safety related items that you shot~ldfollow during the
heating season to assure continued safe
operation of the furnace.
1. lnspect furnace venting. Ventingmust be free of obstructions,void of soot and
Drooerlvterminated to the atmosohere. (See lnstallina Vent Assemblv.)
-
WARNING! Donot install screens over the vent for any reason. Screens
will become restrictedand cause unsafefurnace operation. Accessories
are being marketed for RV products which we do not recommend. For
yoursafety, onlyfactory authorized parts are to
be usedonyour furnace.
2. Periodically inspect the vent for obstructions or presence of soot. Soot is
forined whenever combustion is incomplete. This is your visual warning that the
furnace is operating in an unsafe manner. If soot is present, Immediately shut
furnace down and contact your dealer or a qualif~edservice person.

3. Periodically observe the mainburnerflame to assure it is burning with a hard
blue flame withwell defined burner ports (See Figure 12) If flame appears yellow
or burner has a lazy flame, shut furnace down. It is possible that burner needs
cleaning or replaced. To inspect the main burner, remove the four
(4) screws(A,
8. C and D)securing the burner access door to the combustion chamber (See
F~gure11). If excessive rust and corrosion are present on burner surface, the
-
burner must bethoroughly cleanedor replaced.The burn& maybecleaned using
asteelwire brushand blowncleanusinghighcompression air. Contactaqualified
service person for assistance.
NOTE:To observeflame, cabinet frontmust beremoved.Operationof burnercan
then be observed through the viewing window on front of chamber (See Figure
11).
4. Keepfurnaceclean. Morefrequent cleaning may berequired dueto excessive
lint froni carpeting, bedding material, etc. It is imperative that control
compartments, burnersandcirculating air passageways of
he appliance bekept
clean.
5. The motor is permanently lubrkatedand requires no oiling.
6. Keep the furnace area clear of any combustible materials, gasoline or other
flammable vapor and liquids.
7. Before operating furnace, check the location of the furnace vent to makesure
itwill notbe blocked by the opening of any door on the trailer. If itcan beblocked.
do not operate the furnace with the door open.
8. Do not restrict the flow of combustion air or the warm air circulation to the
furnace. To do so could cause personal injury and/or death.
9. Never operate the furnace if you smell gas. Do not assume that the smell of
gas in your
RV is normal. Any time you detect the odor of gas, it is to
beconsidered life threatening and corrected immediately. Extinguish any open
flames includingcigarettes andevacuate allpersonsfromthevehicle.Shutoff gas
supply at LP gas bottle. (See safety notice on front cover of this manual
)
10. Immediately shut furnace down and call a service agency if furnace cycles
erratically or delays onignition.
VENT TUBE INSTALLATION NT-12s; NT-16s
TRAILER SKIN
VENi TUBE (CXHAUST) 8' X 2' OD
NT TUBE ASSY (INTAKE) SEE CHART
LPGUNTING SURTACE
**NEVER INSlALL THE EXHAUST
* STANDARD TU3E FURNISHED WITH FURKACE
TUBE WITH LESS THAN 1 1/4' THE SPECIAL TUBES. IF NEEDED. ARE TO
OVfRLAP. OR THE INTAKE BE ORDERED.
TUBE WITH LESS THAN 1/2'
OVERLAP.
Figure 1
Figure3
WARNING! Should overheating occur, or the gas supply fail to shut off,
shut off the manual gas valve to the appliance before shutting off the
electrical supply.
11. Never attempt to repair damaged parts. Always have them replaced by a
qualified service agency.
12. Never attempt to repair the furnace yourself. Seek the help of a qualified
service person.
13.Never restricttheducting installedbyyour trailermanufacturer. Todoso could
cause improper furnace operation.
14. Do not install air boosters in the duct system. Such devices will cause the
furnace to cycleon limitandto have erratic sail switch operation.
15. Clothing or other flammable material should not be placed on or near the
appliance.
16. Always followthe Operating Instructions.Do notdeviatefrom the step-by-step
procedures.
17. Do not use this appliance if any part has been submerged under water.
Immediately call a qualified service technician to inspect the appliance and to
replace any part of the control system and any gas control that has been
submerged under water.
18. Whenconsideringadd-onrooms,porchorpatio,attentionmustbegivento the
venting of your furnace. Foryour safety,do not terminatefurnacevent inside add-
on rooms, screen porch or onto patios. Doing so will result in products of
combustion beingvented into the room or occupied areas.
19. Inanyinstallationinwhichtheventof this appliancecanbecovereddueto the
constructionof the
RV or somespecialfeatureof the RV suchasslide out,pop-up
etc.alwaysinsurethat theappliancecannot beoperatedbysetting the thermostat
to the positive"OFF" positionand shutting off all electrical and gas supply to the
appliance. Neveroperate furnace withvent covered.
VENT TUBE INSTALLATION NT-20s
+-
I'
VENT TUBE (EXHAUST) 8' X 2' 0.
NT TUBE ASSY. (INTAKE) SEE CHART
SKIN
AP
**NEVER INSTALL THE EXHAUST
Ir STANDARD TUBE FURNISHED VITH FURNACE.
TUBE VlTH LESS THAN
1 1/4' THE SPECIAL TUBES, IT NEEDED, ARE TD
OVERLAP, OR THE INTAKE BE ORDERED.
TUBE WlTH LESS THAN 1/2'
OVERLAP.
Figure 2
'X' DIMENSION
23 3/8' TO 25 5/8'
25 5/8' TO 27 7/F
27 7/8' TO 30 1/8'
PART NO.
XO50906
X050712
X05070B
CABINET BACK
TRAILER SKIN
POWERSUPPLY 8 THERMOSTAT WIRES
INTAKE TUBE LENGTH ONLY
2' OD. X 3' STANDARD f
2' DD. X 5' SPECIAL
2' D.D. X 7 114' SPECIAL
//&CURE FURNACE IN PUCE
WrrH (2) SCREWS
THROUGHTHE WALL
FURNACEINSTALLATION

Figure 13
,O~
kij,
Figure 14

REPLACEMENT PARTS LIST
NT-12s NT-16s NT20S
Item
NO.
1
Only factory authorized parts are to be used. Do not attempt to repair defective
I Darts.
When ordering repair parts from your dealer, a Suburban Service Center,or distributor,
always give the following information.
1. Part Number (Not Item No.)
2. Part Description
3. Model No.,Serial No,and Date Code of Furnace
4. Number of Parts Required
Part Number Item Part Number
NT-16s NT-20s Description No. NT-12s NT-16s NT-POS
161154 161154 Ther,mstat(Suburban suppl~edIherrrostat not 34 070446 070446 070446
appl~cableto some models) 35 120158 120158 120158
121224 1212211 Screw. #I0x314 (2Required) 36 390222BK 390222BK 390222BK
120158 120158 Screw. #8 x318 (2 Reauired) 37 120158 120158 120158
. ,
101886 101884 Front. Cab~net
101885 131885 Cab~nel
050715 050715 Duct Collar (2
Required)
070569 070569 Bushing. Snap
050906 050906 Tube Assemblv Intake
3"
050712 050712 Tube Assembl;; lntake
5.
050708 050708 Tube Assemblv. Intake 7 114"
Vent Cap an0 ~xhaustTube Assen
Screw. #10x 314 (6 Reauired)
Bracket. ~~lcroswiich~ountinb
Screw. #2-56x 518 12 Reauiredl
Microswitch Assembly
Washer. Lock #2 (2 Required)
Nut. Hex #2-56(2 Required)
Combustion Chamber
Screw. a10 x 112 Serra:ed Head
Bush~ng.Snap
Screw. #8x 114
L~mttSwitch
Screw. #8x 318 12Reuu~red)
Screw, g6 x 114 (2~equlred)
Splicer
Screw. #8x 318
ibly
120158 120158 Screw. #8x 318 (2Requ~red) 62 062143 062143 062143
070270 070270 Bush~na.Snao 63 170758 170758 170758
Description
Gasket, Combusl~onkrBox
Screw. #8 x318 (2 Required)
Box.Combustion Air (Outs~de)Assembly
Screw. #8x 38(9 Requ~red)
Wheel. Combustion Air
Nut. 10-32Hex Lock (2 Required)
Washer. Flat (2 Required)
Box. combustion Air (Inside) Assembly
Grommet (2Required)
Gasket. Molor
Motor
Impeller. Room
Air
Bracket. combustion Air Housing Mounting
Screw. #8-32Sell Tapping (2 Required)
Electrode
Gasket. Electrode
Screw. #10x 112 (4 Required)
Nut. 10-24HexLockwithWasher(2Requ~redl
Screw 8 x 318
Door, Bumer Access
Gasket. Burner Access Door
Bracket. Switch Mount~ng
Smtch. ONIOFF
Elbow. 90"
Gas Fitting
Screw. #10x 112
Gasket. Pipe Inlet
Plate. Gas Inlet Cover
Pioe. Gas lnlet
121388 121388 121388 ~crew.ii10~'112Serrated tlead 64 161123 161123 161123
520820 520820 520820 Module Board 67 170746 170746 170746 Manifold Assembly
121271 121271 121271 Nut. 6-32HexLock (2 Required) 68 120615 120615 120615 Screw. U8 x 1/2(4 Required)
062392 062392 062392 Bracket. Combustion Air Housing Stillener 69 180225 180224 180231 Orifice. Main Bumer
070450 070450 070450 Gasket, Burner Tunnel 070449 070449 070449 Gasket. Man~fold
70 010614 010614 010614 Burner Assembly
120717 120717 120717 Nut. 10-24HexLockwith Washer(2Required) 71
120158 120158 120158 Screw. #8x
38 (2 Required)

TWOYEAR LIMITED WARRANTY
SUBURBAN RECREATIONAL VEHICLE FURNACE
TWO YEAR LIMITED WARRANTY
This Suburban pr'oduct is warranted to the original purchaser to be free from defects in material and workmanship under normal use and
maintenance for a period of two years from date of purchase whether or not actual use begins cn that date. It is the responsibility of the
consumer/owner to establish the warranty period. Suburban does not use warranty registration cards for its standard warranty. You are required
to furnish proof of purchase date through a Bill of Sale or other payment record.
Suburban will replace any parts that are found defective within the first two years and will pay a warranty service allowance directly !o the
authorized Suburban Service Center at rates mutually aareed upon between Suburban and its authorized sexice centers. Replacement parts
will be shipped FOB the shipping point within the ~orhn6ntalunited States, Alaska and Canada to authorized service centers performingsuch
repairs. Before havingwarranty repairs made,confirm that the service aqency is an authorized service center for Suburban. DO
NOT PAY THE
SERVICE AGENCY FOR WARRANTY REPAIRS; SUCH PAYMENTS WlLL NOT BEREIMBURSED.
For warranty service, the ownerluser should contact the nearest authorized Suburban Service Center, advising them of the model and serial
numbers (located on the furnace) and the nature of the defect. Transportation of the unit to and from the Service Center and/or travel expenses
of the Service Center to your location is the responsibility of the owner/user. A listing of authorized Service Centers is included in the owner's
packet supplied with the furnace and a current listing may be obtained from Suburban. If you cannot locate an authorized service center locally,
the service agency chosen to perform warranty repairs must contact our Service Department at 423-775-2131 for authorization. Unauthorized
repairs made will not be paid by Suburban.
THREE YEAR LIMITED WARRANTY ON HEAT EXCHANGER
The furnace heat exchanger is further warranted to be free from defects in material and workmanship during the third through fifth year after the
date of original purchase. A replacementheat exchanger will be provided under the same conditions as stated inthe two year warranty EXCEPT
no labor reimbursement will be provided.
LIMITATION OF WARRANTIES
ALL IMPLIED WARRANTIES (INCLUDINGIMPLIEDWARRANTIES OFMERCHANTABILITY) ARE HEREBYLIMITED INDURATIONTOTHE
PERIOD FOR WHICH EACH LIMITEDWARRANTY IS GIVEN. SOME STATES DONOTALLOW LIMITA'LIONS ON HOW LONG AN IMPLIED
WARRANTY LASTSSOTHEABOVE LIMITATIONS MAY NOTAPPLY TOYOU.THE EXPRESSEDWARRANTIESMADEINTHlS WARRANTY
ARE EXCLUSIVE AND MAY NOT BE ALTERED, ENLARGED, OR CHANGED BY ANY DISTRIBUTOR, DEALER OR OTHER PERSOI\I
WHOMSOEVER.
SUBLIRBAN WlLL NOT BE RESPONSIBLE FOR:
1. Normal maintenanceas outlined in the installation, operating and service instructions owner's manual including cleaning of component parts;
such as, orifices and burners.
2. Initial checkouts and subsequent checkouts which indicate the furnace is operating properly, or diagnosis without repair.
3. Damageor repairs required as a consequence of faulty or incorrect installation or application not in conformance with Suburban instructions.
4. Failure to start and/or operate due to loose or disconnected wires; water or di~tincontrols, fuel lines and gas tanks; restriction or alteration
o! return air circulation; low voltage.
5. Routine adjustments that may be required to the thermostat, electrode and burner.
6. Costs incurred in gaining access to the furnace.
7. Parts or accessories not supplied by Suburban.
8. Freight charges incurred from parts replacements.
9. Damage or repairs needed as a consequence of any misapplication, abuse, unreasonable use. unauthorized alteration, improper service,
improper operation or failure to provide reasonable and necessary maintenance.
10. Suburban products whose serial number has been altered, defaced or removed.
11. Suburban products installed or warranty claims originating outside the Continental U.S.A.. Alaska, Hawaiiand Canada.
12. Damage as a restllt of floods, winds, lightning, accidents, corrosive atmosphere or other conditions beyondthe control of Suburban.
13. ANY SPECIAL, INDIRECT OR CONSEQUENTIAL PROPERTY, ECONOMIC OR COMMERCIAL DAMAGE OF ANY NATURE
WHATSOEVER. Some states do not allow the exclusion of incidental or consequential damages, so the above limitation may not apply to you.
NOREPRESENTATIVE,DEALEROR OTHER PERSON ISAUTHORIZEDTO ASSUME FORSUBURBANMANUFACTURINGCOMPANY ANY
ADDITIONAL, DIFFERENT OR OTHER LIABILITY IN CONNECTION WITH THE SALE OF THlS SUBURBAN PRODUCT.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
IF YOU HAVE A PRODUCT PROBLEM
FIRST:
If your RV has its original furnace and is still under the RV manufacturer's warranty, follow the steps described in your RV owner's manual.
SECOND:
Contact a conveniently located recommended Suburban Service Center. Describe to them the nature of your problem, makean appo~ntment,
if
necessary, and provide for delivery of the furnace to the selected service center.
THIRD:
For the location of the nearest service center, refer to the listinq provided or contact:
I
Suburban Manufacturing Company
Customer Service Department
Post Office Box 399
Dayton, Tennessee 37321
[phone], Ext. 1
For lilture reference, you should recordthe follcwing information
MODEL NUMBER
SERIAL NUMBER
--
STOCK NUMBER
DATEOF PURCHASE
Part Number 203195
5-8-02