Suburban SF-42F User manual

SUBURBAN MANUFACTURING COMPANY
PostOffice Box
399
Dayton, Tennessee 37321
SUBURBAN GAS FURNACES
IIVSTALLATION INSTRUCTIONS
FOR MODEL SF-42F
The design ofthe furnace has been listedfor installation inrecreational vehicles only. In order forthe furnaceto operate inconformity
with generally accepted safety regulations, the installation instructions must be followed. Failure to comply with the installation
instructionswill void the warranty on the furnace and any responsibility on the part ofSuburban Manufacturing Company.
Thefurnacewas inspectedbeforeitleftthefactory. Ifany parts are foundtobedamaged,donotinstallthefurnace. Immediately contact
the transportation company and file a claim.
r-
I
FOR YOUR SAFETY
WHAT TO DO IF YOU SMELL GAS:
Extinguish any open flame.
Evacuateall persons from the vehicle.
Shut off the gas supply at the gas
container or source.
I
Do not touch any electrical switch, or
useany phone or radio inthe vehicle..
Do not start the vehicle's engine or
electric generator.
Contact the nearest gas supplier or
qualified servicetechnician for repairs.
If you cannot reach a gas supplier or
qualified service technician, contact the
nearestfire department.
Do not turn on the gas supply until the
gas leak@)has been repaired.
FOR YOUR SAFETY
DO NOT STORE OR USE GASOLINE OR
OTHER FLAMMABLE VAPORS AND
LIQUIDS IN THE VICINITY OF THIS OR
ANY OTHER APPLIANCE.
WARNING! Improper installation,
adjustment, alteration, service or
maintenancecan cause propertydamage,
personal injury or loss oflife. Referto the
illstallation instructions andlor owners
manual provided with this appliance.
Installation and service must be
performed bya qualified installer, service
agency or the gas supplier.
1 his hook contains instructions covering the operation and
maintenance of your furnace. Keep with unit at all times.
WARNING! Be sure the furnace and all1
Should you require further information, contact your dealer or
nearest Suburban Service Center.
ignition systems are "OFF" during any
type of refueling and while vehicle is in
1 motion or beingtowed.
WARNING! Installationofthisappliancemustbemadeinaccordancewith
thewritten instructionsprovided inthis manual.Noagent, representative
or employee of Suburban or other person has the authority to change,
modify or waive any provision of the instructions contained in this
manual.
INSTALLATION INSTRUCTIONS
CAUTION: Dueto the differences invinyl siding, this appliance should not
be installedonvinylsiding withoutfirstconsultingwiththe manufacturer of
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
coveredduetotheconstruction of the RVorsome specialfeature oftheRV
These furnacesare designed and installed in such a manneras to be removable
SUC~ as slide out, pop-up etc. always insurethat the appliance cannot be
only from w~thinlivtngarea of the recreationalveh~cle operated by setting the thermostat to the positive "OFF" position and
shutting off all electrical and gas supply to the appliance. Never operate
CAUTION: If possible, do not install the furnace to where the vent can be furnace with ventcovered.
coveredorobstructed when any door onthetrailer isopened. Ifthis is not
possible, then the travel of thedoor must be restricted in order to provide NOTE These furnaces must be
installed and ventedas described inthis manual
a
6" minimum clearance between the furnace vent and any door whenever SO that the negatlve pressure created by the air clrculating (returnair) fan cannot
the door is opened. affect the combustion air intake or ventingof any other appliance. It is imperative
that the productsof combustton beproperlyvented to the atmosphereand that all
The exhaust temperature of this furnace could discolor or warp some combustion air supplted to burner be drawn from the outside atmosphere. (See
materials You should verify that the material used on the coach door, panel, or lnstalljng Vent Assembly.)
cover wlll notd~scoloror warp from the exhaust temperature whenever any door,
panel, or cover
IS in the open posttion NOTE. Do not install the furnace with the vent facing toward the forward end of
the coach
Form No. 2557-C

IMPORTANT: If this furnace is to be connected to a common duct system also
sewing a cooling unit, a manual or automatic damper is required to prevent any
cold conditioned air from circulating back into the furnace. Cold air passing over
thefurnacecombustionchamber during the operation of thecoolingunltcan result
in the formation of condensation inside the furnace combustion chamber. This
condensation may promote corrosion and premature failure of the combustion
chamber.
NOTE: These furnaces shall be installed so the electrical components are
protected from water.
These furnaces are design cert~f~edfor propanelLP gas only. Do not attempt to
convert to natural gas
Gas supply pressure for purposes of input adjustment.
Minimum
- 11"WC '
Maximum - 13" W.C. '
(W.C.' - Water Column).
In the U.S A,the installation of the furnace must be in accordance wtth local
codes and regulations. Inthe absence of local codes and regulations, refer to the
latestedition of:
I. Standard for Recreational Vehicles ANSl A-119.2lNFPA 501C
2. National Fuel Gas CodeANSl 2223.1
3. Furnace must be electrically grounded in accordance with the latest edition of
the National Electrical Code ANSllNFPA No.70.
In Canada, the furnace must be installed In accordance with:
1. Standard CANICSA-ZZ4ORecreational Vehicles.
2. CSA Standard CANICSA-Z240.6.2-M86 Electrical Requirements for
Recreational Vehicles.
3. Standard CANICSA-Z240.4 2-M86 Installation Requirements for Propane
Appliances and Equipment in Recreational Vehicles.
4. CANICGA-0149 Installation Codes.
5. Any applicable local codes and regulations.
This unit is equipped with an electric igniter devlce that has an energy
consumption of
1 amp @ 12 volts D C.
RETURN AIR
There are two (2) methods described below for Installing the furnace. Regardless
of the method you choose. we require that a permanent opening be provided in
theinteriorcabinetry of thecoachdirectly infrontofthefurnace. Theopening must
allowfor free, unobstructed removal of thefurnace This opening may be usedas
a meansofproviding circulating return air to the furnace. Other openings may be
usedas well.
It is important that adequate return air beprovided to assure normal
heatingandoperationof the furnace. Failure to provide the minimumreturnairwill
cause erratic furnace cycling.Refer to the chart shown belowfor minimum return
air requirements.
'may be reduced to 88 sq In mln. if 5 ducts are used
TABLE 1
NOTE: Returnalr must be from within the living area of the coach.
Return Air Requirements
Model Minimum Free(unobstructed)Area
INSTALLING THE FURNACE
SF-42F
NOTE: Before installing the furnace
"X dimension as illustrated in Figure 2 must
bedetermined.
1. Locate the furnace near lengthwise center of the coach.
142 Sq. In.'
2. Choose a location for installat~onout of the way of wires, pipes, etc.. which
might interfere with the installation. Adhere to the minimum clearances from the
cabinet to combustible construction as listed in Table 2. Refer to Ftgure 3 for
illustration of furnace clearances.
NOTE: Side and top clearances may be"0"for through the wall
installations upto
a maximum of
3" wall thickness. (See Figure 1 .)
3. When an appliance is installed directly on carpet~ng,tile or other combustible
material, other than wood flooring, the appliance shall be installed on a metal or
wood panel extending the full width and depth of the appliance. If preferred, the
carpeting, tile or cornbust~blematerials, other than wood may becut away the full
length and depth of the appliance plus the appliance minimum clearances to
combustibles. (See Table 2.)
4. Determine "x" dimension as shown in Figure 2. The tubes supplied with the
furnace will accommodate an installation range for "x" from 1-112
- 3". If "x'
dimension is less than 1-112" or greater tha~ 3", then special vent tubes as
charted in Figure 2 must be ordered.
WARNING! Do not alter, cut or otherwise modify the vent tubes as
supplied by Suburban. Doing so could result in inadequate intake of
combustionair or improper venting of furnace exhaust.
5. After determining "x"dimension, complete the furnace installation as follows,
A. IFINSTALLEDDIRECTLY AGAINST OUTER SKlN OR
"X" DIMENSION IS
0 - 1-112"
I. Vent Kit 520597 must beordered. Dn no! cut or al!er the ven! !sSes supp1ie3
with the furnace.
2. Cut anopening through the inner wall 17.314 x8". Thiswill allow the rearofthe
furnace to be installed against the outer skin of the coach. (See Figure 1.)
3. Cut two 2-114" diameter holes through the outer skin of the coach, as shown
in Figure
1
4. Put furnace In place, making sure lhat rear of furnace cabinet is as close to
outer skin ofcoach as possible and still assure proper vent tube overlap. (See
Installing Vent Assembly
) Secure furnace to cabinet.
5 Uslng the two 10 x 314 stainless screws provtded fasten furnace to floor of
coach through the two holes provlded inthe front plenumareaoffurnace cab~net
(SeeFtgure 1 )
6 Install vent assembly (See instructions for lnstalllng vent )
6. IF NOT INSTALLED AGAINST OUTER SKlN AND "Xu DIMENSION
GREATER THAN 1-112"
1. Determine "xu dimension as illustrated in Flgure 2. Tube length for "x"
dlmenslon are charted. Speclal tubes. if needed, must be ordered.
2. Locate center lines for exhaust and intake tubes as shown Figure 1. Cut two
2.314" diameter holes through coach wall for exhaust and intake. (See Figure 2 )
3. Put furnace in place and secure furnace to cabmet. (See Figure 1 .)
4. Using the two 10 x 314 stainless screws provided, fasten to floor of coach
through two holes provided in front plenum area of furnace cabinet.
5. Install vent assembly. (See instructions for Installing Vent.)
6. Reinstall cabinet front
Left Right Exhaust
and
Model Front Side Side Top Bottom Back Intake Tube
SF-42F 1" 2" 2" 1"
0 0 3/13"
-NOTE-
O" MEANS TO SPACER BUMPS
I
CLEARANCE FROM DUCTS TO
COMBUSTIBLE MATERIAL
- 114" (See Fiqure 3)
I
I
-.
I
TABLE 2
INSTALLING VENT ASSEMBLY
The ventoutlet must be installed so it is in the same atmospheric pressure zone
asthe combustion air intake. Theexhaust and intake tubes mustbeinstalled from
the outside, pass through the RV skin and slide onto the furnace exhaust and
intake.
WARNING! Donot
alterthe vent assembly suppliedwiththis furnace. Any
modificationswillresultinimproper installationwhich couldcause unsafe
furnace operation.
CAUTION! Combustion airmustnotbedrawnfrom the livingarea. Allairfor
combustionmustbedrawnfromtheoutsideatmosphere. All exhaustgases
mustbevented to theoutsideatmosphere
- never insidethe RV. Therefore,
itisessential to insurethat the vent cap and tube assemblies are properly
installed.
I. Apply caulking to RV skinbehindventcapas showninFigure 1.Apply caulking
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 2.) Mlnimumtube overlap of 112" is required.
3. Insert vent cap exhaust tube through RV skin and slide it onto the furnace
exhaust (See Figure 2.) 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 upslde down. The words "Suburban" and "Dayton,
Tenn." must be right side up.
CONNECTING GAS SUPPLY
Connect the gas slipply to the fui-ace at the manifold, following the suggestions
outl~nedbelow. Itw:il bececessary to hold the flare fitting on the furnace manifold
when connecting or loosening gas llne
NOTE: The compound sed :.:I threaded joints must be resistant to liquefied
petroleum (LP) gas.
NOTE: The appliance must be disconnected from the gas supply piping system
during any pressure testing of that system at test pressure inexcess of 112 PSIG.
The appliance must be isolated from the gas supply piping during any pressure
testing of the gas supply piping system at test pressure equal to or less than 112
PSIG.
I. Connect gas line to the 318" elbow at the front of the furnace. (See Figure 1 .)
Some standards may requlre the use of a manual shut OKvalve in the gas line
external to the furnace cabinet.
2. Inorderto maintain acheck of gas supplied pressureto the furnace, Suburban
advises the installer to provide the 118" NPT plug tap for test gauge connection
immediately upstream of the gas supply connection to the furnace and that
it be
readily accesible.
3. After the furnace has been connected to the gas supply, all joints must be
checked for leaks.
[::YARNING! Never check iorleakswith arl oijen ilzrnr. Tufr! oic ii;?
I apply soapy water to all joints to see if bubbles are formed.
1

CONNECTING ELECTRICALSUPPLY
CAUTION:This furnace isdesignedfor negative ground 12volt D.C. system
only. Do not attempt to alter the furnace for a positive ground system or
connectthefurnacedirectlyto 115voltsA.C. Damageto!urnacecomponent
,. -.. parts will occur.
Be sure all wiring to the furnace is of heavy enough gauge to keep the voltage
'
dropthroughitto a minimum atidto provideenough powerfor start-up surge. No.
12gaugewire is recommended. If any of the orig~nalwire that 1s suppl~edwith the
appliancemustbe replaced, it mustbe replacedwith type
105" Cor itsequivalent
Powersupplyconnectionsareto be on the r~ghtsideof the furnace. The wires are
colorcoded, red for positlve
(+) ar,d yellow for negat~ve (-). Th~spolarity must be
observed so the furnace motor
will run the proper dlrect~onof ro!atlon to Insure
correctair delivery. (Seewring diagram )
Ifthe furnace power supply is to be frorn a converter, we recommend thar the
convertersystem usedto powerthe furnace be w~redIn parrallelw~ththe battery
This
will serve two purposes.
I. Providea constant voltage supply to the furnace.
2. F~lterany A.C. spikes or volt surges
CONNECTING DUCTS TO FURNACE
The following duct requiremefits must be followed in orde~to assure proper
operationof the furnace:
A. The minimum open duct areas listed below m~~stbe maintained throughou!
entire duct system including through register
SF-42F
1 48 SQ. IN. I 4 1 4" 1 56 SQ. IN. I '72 SQ. IN.
'SF-42F Bottom Duct roquiros use of Bottom Duct Kit, Part No. 520753.
MODEL
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 inthe required duct area.
6. Maketheduct connections at the furnacecabinet t~ght.Looseconnections will
resultinoverheating of the component partson thefurnaceanda reductionof the
heatedair flow through the duct system.
C. Avoid makingany sharp turns inthe duct system. Sharp turnswill increase the
static pressurein the plenum area and could cause !he funace to cycle.
SIDE DUCTS
\
D. Avoid makinga lot of turns in the duct system. The straighter !he ductsystem.
j
the better the performance of the furnace.
TOP DUCT
Min. Open
DuctArea
Mia. Open
Duct Area
. - .,
E. Maintain a minimum of 11fl clearance where ducrs pass through any
combustible construction, such as coach catiinetry. (See Figure
3.) NOTE: UL
listedduct materials can be
D" clearance.
BOTTOM DUCT
Min. Open
Duct Area
F. Do not install air boosters in the duct system. Such devices will cause the
furnace to cycle on lim~tand to haveerratic sail switch operation
Min. No.
Ducts Used
N0TE:Aflerinstallationof thefurnaceand ductsysremiscompleted,adjustments
must be made to obtain a temperature rise within the range specified on the
Rating Plate. INSTALLINGTHERMOSTAT
Duct
Size
Locate[he roomthermostat
approximate!^ 4-11?.feet above the floor on an inside
bulkhead where it is not affected by heat from any source except room air.
Connect thermostat wiring to the bluewires on rightside of furnace. (See wirlng
diagram.)
PREVENTIVE MAINTENANCE
in which 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
andlor the production of carbon monoxide exists which can cause
CAUTION: Labelallwiresbeforedisconnecting forservicing. Properpolarity
mustbe observed sothefurnace motorwill runwith the properdirection of
rotation toinsure correct air delivery. (See wiring diagram).
CAUTION: Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and dangerous turnace operation.
Always verify proper operation offurnace after servicing.
Yo~riurnace should be :ospected by a qualified servlce agency yearly before
turnlny the furnaceon.Particularattent~onshouldbe given to the following items.
1. !nspectfurnace installation and vent terminationto be sure furnace is properly
secured in place (see Installation I~structions),that vent terminates to the
atmosphere,and that vent tubes oveilap properly(seeInstallingVent Assembly.)
, 2. lnspect chamber and venting to assure that thesecomponents are physically
sound without holes or excessive corrosion and that the installation andlor re-
...-- /
installationis in accordance with Suburban'si~stallationinstructions. (Reference
installation manual supplied with furnace.)
WARNING! Itis imperative that the products of combustion be properly
vented to atmosphere and that all combustion air supplied to burner be
drawnfrom outside atmosohere.
3. Check the base on which furnace is mounted. Be sure it is phys!cnlly sound.
void of any sagging, deterioration, etc.
4. lnspect furnace, the venting, ducting and gas pip~ngtc !urnace for obvious
signs of delerloratlon. Correct any defects at once.
5. lnspect combust~onchamber for
restrictions In exhaust or intake. It is
~mperatlvethat the flow of ~ntaitecombustion air and the flow of exhaust gases
being expelled to the outside atmosphere not be cbs:ructcd Any soot or loose
debr~sshould be blown out using compressed ali (See Flglire 6 )
6. I~spec!all gaskets If any gaskets show slgns of leakage or deterioration,
replace them Safe
operation of the furnace depends on all gaskets being tight.
7. Inspec: retgrn alr Inlet openlngs to the furnace Remove any restr~ct!onslo
assure adequate alr flow.
You, as the ownerluser, should inspect the furnace monthly during the
heating season for presence of soot on vent.
Operating the furnace under this
condition could lead ta serious propertydamage. persvnal inj~ryor lossof Ilfe.If
soot is observed on the vent, lmmedlately shut the furnace down and contact a
qualif~edservlce agency
Listed be!ow are several safety related i!erns that you s!lould follow during the
heatlng season to assure con!inued safe operation of[he furnace
I. lnspectfurnaceventing ?fenlingmustbefree of obstruct~ons,vo~do!soot,and
properlyterm~natedfcthe atmosphere. (See InstallingVent Assembly.)
WARNING! Donot install screens over the vent for any reason. Screens
will become restricted and cause unsafe furnace operation. Accessories
are being marketed for RV products which we do not recommend. For
your safety, only factory authorized parts are to be usedonyour furnace.
2. Per~odicallyinspect the vent for obstructions or presence of soot. Soot is
formed whenever combustion is incomplete. This is your visualwarning that the
furnace is operating in an unsafe manner. If soot is present, immediately shut
furnace down and contact your dealer or a qual~fiedservice person.
3. Keepfurnaceclean More frequen! c!eaning may berequireddueto excessive
l~ntfr~mrarpeting. bedding material, etc It is imperative that control
compartments, burnersand circula!ing air passagewaysof the appliancebekept
clean.
4. The motor is permanently I~br~catedand requires no oillng.
5. Keep !he furnace area clea: of any combustible materials. gasoline or other
flammable vapor and liquids.
6. Beforeoperatingfurnace, check the location of!he furnacevent to make sure
iiw~llnot beblocked by the opening of any door on thetrailer. If itcan be blocked.
do r~otoperatethe furnace wi!h the door open.
7. Do not resirlct the flow of combustion air or the warrri alr
circulation to the
furnace. To do so could cause personal injury and!or death.
8. Never operate the furnace if you smell gas. Do not assume that the smell of
gas in your
RV IS norma! Any time you detecr the odor of gas, ~tis to be
considered life threatening and corrected immediately. Extinguish any open
flamesi-cluding cigarettesandevacuateallpersonsfrom thevehicle.Shu!offgas
supply at LP gas bottle. (See safety notice on f:ont cover of this manual.)
9. lmmed~atelyshti! furnace down and call a service agency ~ffurnace cycles
erraticaily or delays on ignition.
WARNING! Should overheating occur, orthe gas supply fail to shut off,
shut off the manual gas valve to the appliance before shutting off the
electrical supply.
10. Never attempt to repair damaged parts. Always have them replaced by a
qualified service agency.
11. Never attempt to repalr the furnace yourself. Seek the help of a qualified
service person
12.Piever restrlcttheducting installed byyourtrailernianufacturer.To doso could
cause improper furnace operation.
13. Do not
install air boosters in the duct system. Such devices will cause the
furnace 15 cycle and to have eira!ic sail switch operation.
14. Clothing or other flammable material should not be placed on or near the
appl~ance
15.Alwaysfollowthe Operating Instructions. Donotdeviatefromthe step-by-step
procedures.
16. 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 underwater.
17. When consideringadd-on rooms, porchor patio,attentionmustbegiven tothe
ventingof your furr:ace. Foryour safety,donot terminate furnacevent insideadd-
on roo,ns, screen porch or onto patios. Doing so will result in products of
combust~onbeing vented into the room or occupied areas.
18. Inany lnstallationinwhich the ventof this appliancecanbecovereddue to the
constructionof 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 pos~tive'OFF" position and shutting off all electrical and gas
supply to the appliance. Never operate furnace with vent covered

INSTALLATIONAND REMOVAL OF UNIT
TO REMOVE
I. Disconnect power supply at furnace.
2. Remove vent cap assembly.
3. Disconnect gas connections.
4. Remove cabinet front (2 screws).
5. Removetiedownscrew fromcenter ofunit andremovefurnacefrom cabinet.
TO INSTALL
I. Slide unit intocabinet. NOTE:Care must be taken inroutingwiring to backof
cabinet and outside of cabinet.
2. Reinstall tiedown screw. securingchamber assemblyto cabinet.
3. Reinstall cabinet front.
4. Connect gas line.
5. Checkgasconnectionsfor leaks usingasoap andwater solution. Correctany
gas leaks immediately.
6. Reinstall vent cap assembly.
7. Reconnect power supply.
OPERATINGINSTRUCTIONS
WARNING1Donotoperate furnace while vehicle is inmotion or being
towed.
NOTE: During initial firing of this furnace, a burn-off of excess paint and oils
remainingfrom manufacturing process maycause"smoking"for
5 - 10 minutes.
I. Stop! Read Users Information Manual supplied with furnace.
7. Allow30secondsfor main burner to lightafter blowercomes on. Thisfurnace
isequippedwith an ignition device which automaticallylights the burner. Donot
try to light the burner by hand.
8. If burner does not light, repeat Steps 1 through 8.
9. If after three (3) attempts with noignition, go to shut down and contact your
dealer or a local recreational vehicle service agency. Do not continue to cycle
furnace through thermostat In an attemot to aet ian~tion.NOTE: If furnace
- ~
should lock out, the blowerwill go off in'5 miiutesand remain off until unit is
reset by reactivatingthermostat.
TO SHUTDOWN
I. Set the thermostat to lowest setting, then movelever to "OFFposition.
2. Turn manual shut off valve (if so equipped) to the 'OFF" position. Do not
force.
ELECTRODEADJUSTMENT
For consistent ignition of the burner, it is important that the electrode be
positioned properly over the top of the burner. The electrode was set at the
factory for proper ignition and should not need further adjustment; however, if
you should experience inconsistent ignition, reposition electrode as follows:
Equipmentneeded:
flashlight
blackfelt-tip pen
needle-nosepliers
measuringtape
NOTE: Furnacemust beremoved. (See instructions for removing unit.)
I. Removeburnerfrom combustion chamber by removingsix (6) screws which
attach the burnerto the chamber and air baffles (plates).
2. Locate the lance in relation to the burner ports for electrode positioning by:
2. Turn the manual valve (if so equipped) or the valveat the outside LPtank to a. Shine a flashlight intothe burnerventuri as illustrated. (Be sure flashlight
the "OFF" position. Do not force. lens is against the end of the burner.)
3. Set thermostat above room temperature to begin blower A
slight
b. Lightwill reflectoff the lancein theventuriof the burnerandshine through
a portionofthe two (2) rolls of burner ports in the top of the burner.
delay will occur before the blower comes on. Allow blower to run for
5 minutes
c. Using a black felt-tip pen, mark a line along top of burner 311 6m in back of
for combustion chamber purge cycle. the lance and parallelwith lance. Makean additional mark indicating the .
4. After 5 minutes, move thermostat lever below roomtemperature. Blowerwill centerlineof the lance. (See illustration.) Bothmarkswill beusedlater as
remain on. Wait approximately 2 minutes for blower to go off. referencemarks; therefore, keen lines thin.
- -
r
5. Open manual shut-off valve (if so equipped) or the valve at the outside LP
3. Reassemblethe burner.
tank.'~orrectoperatingcharacteristicsdependonthevalvebeingpositionedfully
open. Neverattempt tooperate withavalvepartiallyclosed.NOTE:Thisfurnace
4. Adjustelectrode SO theelectrodeprobeispositionedalongthemarkedcenter
is eauiooed with a valve shut-off switch. with switch in"OFF position. Gas will lineof!he burner lance
, . . . . and . . the tip of the electrode terminates 3/16" from the
not flow'to burner norwill the furnace operate. baaot the lance. (At tne llne marked inStep 2c.) (See Figure
4.)
6. Setthermostat levertodesiredsett~ng.Ifset aboveroomtemperature,blower
5- IMPORTANT: Be sureelectrode probemaintainsa 118" sparkgap over
will come on. the burner as illustrated.
6. Reinstall thefurnace ~ntothe cabinetfollowing the instructionsinthe manual.

'
SF-?OF, SF-25F. SF-30F, SF-35F. SF-42F. STANDARD VENT INSTALLATION
I
8 INTAKE, 1/2' MINIMUM OVERLAP
B ExHAusT. 1 114- nINInun ovERL-'l [TRAILER SKIN I
FRONT GAS
HOOKUP
MOUNTING
SURFACE
BNEVER INSTALL THE EXHAUST TUBE
VITH LESS THAN
1 1/4' OVERLAP. OR
THE INTAKE TUBE VITH LESS THAN
1/2' OVERLAP.
*STANDARD VENT ASSEMBLY FURNISHED VITH FURNACE. SPECIAL EXTENSION TUBES, IF
NEEDED, MUST BE ORDERED SEPARATELY. EXTENSION KITS COME VITH COHPLETE
INSTALLATION INSTRUCTICNS.
,-, +OPENING FLR RETURN AIR
\
i
Figure 2
0' TO SPACER
I
ELECTRODE
---.-----..-------------...-----------.---.------------.----
I *THE TOTAL, FREE. UNOBSTRUCTED RETURN AIR OPENING
I
I TO THE FURNACE nus1 NOT BE LESS TW
LSPECIFICD --__._..._..._..___---------------....- 1
Figure 3
.
€x*
LIMIT sw. YC.
I
FRONT END OF B~RNERJ
+MARK BURNER ,308 FROM BACK OF LANCE
,125 SPARK GAP OVER TOP OF BURNER
LVENTURI TUBE
Figure 4
Figure 5
5
I
CODE
0
BK
BR
BL
Y
G
COLOR
ORANGE
BLACK
BROWN
BLUE
RED
YELLOW
GREEN
ALL WIRES ARE 18 AVG UNLESS OTHERVISE SPECIFIED
NOTE8 If ANY Of THE ORIGINAL VlRES AS SUPPLIED
WITH THE APPLIANCE MUST BE REPLACED, IT MUST
BE REPLACED VITH VIRING HATERIAL HAVING A
TEMPERATURE RATING OF AT LEAST 105' C.
+ 16/30 200.C RADIX (SIL-A-BLEND) 18 AVG WIRE
14 AVG 105'C THERHOPLASTlC
CAUTIONl DO NOT HI-POT
(DIELECTRIC HIGH VOLTAGE
TEST) THIS UNIT AFTER
INSTALLATION. TO DO SO MAY
CAUSE COMPONENT DAMAGE AND
VOIDS WARRANTY OF FURNACE.
UNIT 100% FIRE CHECKED,
340501

TO CLEAN THE CHAMBER. TtIE i!lRNACC HUST BE RiNC\'iD FROM
THE CARINEI
AND THE MANIFO!.C BLO'JE:! nsSEuBl Y Ahill C3UTRO-5
REMOVED LEAVING TYE CI-IaMBL.. w. 4S S!-IUVN USTNG
COMPRESSED AIR. BLOU Td20Vili iilE CHAMRCR. AS S!iO'JN B'
ARPOVS, TO REMOVE SOOT LIR L'JUSE DEBRIS
Figure 6
Figure 8
Figure 7
3'2
Figure 9
6