FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you
Contents
1. 062942 46 Gasket Electrode eet eae 070163 47 VOL a font Jo Wy Salto og BS dae ch Siow stone payin ry 232784 48 Screw 8 X 3 8 6 Required 120158 49 Gille Assembly l ove ae ped need they eT 030966 49A Screw 10 24 x 1 2 2 Required 121877 50 Door Burner ACCESS 322 5006 ehh eee ee aoe Bee ee 031172 51 Gasket Burner Access Door 00002 teens 071151 52 Screw 8 32 X 3 8 Black 2 Required 121407 53 Bracket Limit Switch 062944 54 Chamber Assembly Comes with Item 4 021178 55 Limit SWEN acon Bhan ash au ms aa eae hi nee ganesh E as sha 231768 56 Screw 2 Required POPP ERAN Wen EOS 121502 57 Cabinet Wrap Assembly 101890 58 BUSHING kaso ana Pete asas Gam Ek Wayan wik del Beale pel 070856 59 Screw 2 Req lfed y ban bok tag Sta pul ed weed nha GRE pukuyka 121717 60 Fuseholder Not Shown 231908 61 Electrode Wire Not Shown 231783 62 Splice obit atta ok gent OS S wakas oem 230714 63 Scfew 2 REQUIRED cates hc balks mishay way oe Pte Dee ae oe 121244 64 Nut 10 247 Keps 2 1 eee 12072. Swa B aa 010886 23 Gasket Manifold _ er 070847 24 Screw 3 Required 2 00 eee 121717 25 Manifold with Orifice T Kav ote he sh a ay Matas 171624 26 ubus buy yaq a ek Se re hig aa ei SE Sa aha wads g 180130 27 Gasket Burner Tunnel Chamber End BI Se a as Nats PILI 070848 28 Cabinet Back Assembly 2 0 0 0 00200 e ia ee eee eee 101422 29 2 2 ten gp ag a SEERE TENN aes phatu Perales 121357 30 Screw 10 16 1 gist YS dace E 121936 31 Insulator Module Board 2 eee eee 070807 32 Module Goad eda cae ica ee PARA LGR ER Sem ALCA 520820 33 Space NYON Tereon Hea apaspa pita G ys us sQ hee 063422 35 Bushing Strain Relief nss cete iron oeat ee Da 230216 36 Screw 2 Required ive tals gee y 121717 37 Cover Module Board Oda CURL DEN 090539 38 ONOFF pis raya s ket y eS Qhi Red 232351 39 Bracket Manifold 063235 40 Screw 2 Required 121717 41 161071 42 Gas Bipa BG fe EM 170374 43 B shing U iversal oo icc es u spa 070362 44 Bushing Open Close 070855 45 Bracket Cabinet Tie Down 4 Required
3. shut furnace down and contact a qualified service person NOTE To observe flame remove front discharge qrifle Operation of burner then be observed through the viewing window on front of chamber See Figure 7 3 Periodically inspect the vent for obstructions or presence of soot Soot is formed 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 qualified service person 4 Keep furnace clean More frequent cleaning may be required due to excessive lint from carpeting bedding material etc It is imperative that control compartments burners and circulating air passageways of the appliance be kept clean 5 The motor is permanently lubricated and 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 make sure it will not be blocked by the opening of any door on the trailer If it can be blocked 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 be considered li
4. and venting to assure that these components are physically sound without holes or excessive corrosion and that the installation and or reinstallation is in accordance with Suburban s installation Instructions Reference installation manual supplied with furnace WARNING It is imperative 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 physically sound void of any sagging deterioration etc 4 Inspect furnace the venting and the gas piping to furnace for obvious signs of deterioration Correct any defects at once 5 Inspect main burner To properly inspect burner it must be removed See Figure 8 If excessive rust and corrosion are present on burner surface the burner must be cleaned or replaced The burner may be cleaned with a steel wire brush and the burner ports and venturi blown clean using compressed air f the main burner has been allowed to operate with a high yellow flame a soot formation may be deposited inside the combustion chamber The carbon deposit may be of such quantity that cleaning will be necessary A vacuum cleaner is ideal to clean out any carbon deposit in the combustion chamber 6 Inspect 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 expelle
5. module unless wiring connections are complete and electrode is properly grounded Use extra caution in areas where high voltage is present A input Polarity if a spark is present and the gas valve opens but the system shuts down after the trial period check input voltage for proper polarity B Grounding it is essential to proper operation that the system be properly grounded If a spark is present and the gas valve opens but the system shuts down after the trial for ignition period check for proper ground The following items should be checked 1 Ground screw connecting black motor lead 2 The burner must be securely fastened to mounting pin in heat chamber C Wiring Check all wiring for proper and secure connections Be sure the AMP connector is fully engaged on the control board Check the high voltage wire for proper connection at both ends Clean any corrosion that may interfere with good electrical contact D High Voltage Malfunction If during the trial for ignition the spark is intermittent and the valve may or may not open the following should be checked 1 Electrode spark gap should be 1 8 1 32 2 Ceramic housing check for cracks 3 Electrode lead wires check for cracks or breaks E Valve Malfunction If there is power to the gas valve and a spark during the trial for ignition but the valve will not open check the valve for an open coil or other malfunction F Erratic Operation if the system
6. secure with nuts TRO INS wom gyman pace Figure 8 SERVICE HINTS DIAGNOSIS amp CORRECTIVE MEASURES INSTALLATION SHOULD BE DONE BY A QUALIFIED SERVICE PERSON THE APPLIANCE SHOULD BE INSPECTED BEFORE USE AND AT LEAST ANNUALLY BY A PROFESSIONAL SERVICE PERSON MORE FREQUENT CLEANING MAY BE REQUIRED DUE TO EXCESSIVE LINT FROM CARPETING BEDDING MATERIAL ETC IT iS IMPERATIVE THAT CONTROL COMPARTMENTS BURNERS AND CIRCULATING AIR PASSAGEWAYS OF THE APPLIANCE BE KEPT CLEAN A COMPLAINT NO HEAT 1 Check electrical supply to make sure that 12 volt D C is available at unit Battery must be charged if battery is low there may be sufficient power to run the blower but not enough to run the blower at full speed If blower does not run at it s prescribed speed the microswitch cannot engage and gas will not flow to the main burner Be sure the connections to the voltage lines in the terminal block are tight 2 Manually rotate fan to make sure motor is free to turn 3 Check for blown fuse in 12 Volt circuit to furnace 4 SHORT CIRCUIT CHECKOUT if fuses are blown a short is indicated and should be checked a Turn off all appliances inciuding furnace b Install an ammeter on the positive lead of the battery Amperage reading should be 0 If an amperage reading is noted a short exists the vehicle electrical system c Disconnect the red DC lead at the furnace If the amperage continue
7. 17 65 Screw 10 24 X 1 2 2 Required 121459 TWO YEAR LIMITED WARRANTY SUBURBAN RECREATIONAL VEHICLE FURNACE TWO YEAR LIMITED WARRANTY This Suburban product 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 on 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 to the authorized Suburban Service Center at rates mutually agreed upon between Suburban and its authorized service centers Replacement parts will be shipped FOB the shipping point within the Continental United States Alaska and Canada to authorized service centers performing such repairs Before having warranty repairs made confirm that the service agency is an authorized service center for Suburban DO NOT PAY THE SERVICE AGENCY FOR WARRANTY REPAIRS SUCH PAYMENTS WILL NOT BE REIMBURSED For warranty service the owner user should contact the nearest authorized Suburban Service Center advising them of the model and serial numbers located on the furnace a
8. 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 NO REPRESENTATIVE DEALER OR OTHER PERSON IS AUTHORIZED TO ASSUME FOR SUBURBAN MANUFACTURING COMPANY ANY ADDITIONAL DIFFERENT OR OTHER LIABILITY IN CONNECTION WITH THE SALE OF THIS 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 make an appointment 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 listing provided or contact Suburban Manufacturing Company Customer Service Department Post Office Box 399 Dayton Tennessee 37321 423 775 2131 Ext 4 oN For future reference you should record the following information MODEL NUMBER SERIAL NUMBER STOCK NUMBER DATE OF PURCHASE Part Number 203471 10 16 03 Suburban a subsidiary AIRXCEL Inc OWNERS INFORMATION MANUAL DIRECT SPARK IGNITION For Model DD 17DSI This book contains instructi
9. FOR YOUR SAFETY READ BEFORE OPERATING WARNING If you do not follow these instructions exactly a fire or explosion may result causing property damage personal injury or loss of life A This appliance does not have a pilot It is equipped with an ignition device which automatically lights the burner Do not light the burner by hand B BEFORE OPERATING smell all around the appliance area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor WHAT TO DO IF YOU SMELL GAS Extinguish any open flame Evacuate all persons from the vehicle Shut off the gas supply at the gas container or source Do not touch any electric switch or use any phone or radio in the vehicle Do not start the vehicle s engine or electric generator lt Contact the nearest gas supplier or qualified service technician for repairs If you cannot reach a gas supplier or qualified service technician contact the nearest fire department Do not turn the gas supply until the gas leak s has been repaired C Use only your hand to turn the handle on the manual shut off valve Never use tools If the handle will not turn by hand don t try to repair it call a qualified service technician Force or attempted repair may result in a fire or explosion D Do not use this appliance if any part has been under water Immediately call a qualified service technician to inspect the appliance and
10. al maintenance as 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 Damage or 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 dirt in controls fuel lines and gas tanks restriction or alteration of return air circulation low voltage 5 Routine adjustments that may be required to the thermostat electrode and burner Costs incurred in gaining access to the furnace Parts or accessories not supplied by Suburban 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 Hawaii and Canada 12 Damage as a result of floods winds lightning accidents corrosive atmosphere or other conditions beyond the control of Suburban 13 ANY SPECIAL INDIRECT OR CONSEQUENTIAL PROPERTY
11. d to the outside atmosphere not be obstructed Any soot or loose debris should be blown out using compressed air 7 Inspect all gaskets If any gaskets show signs of leakage or deterioration replace them Safe operation of the furnace depends on all gaskets being tight 8 Inspect return air inlet openings to the furnace Remove any restrictions to assure adequate air flow You as the owner user should inspect the furnace monthly during the heating season for presence of soot on vent Operating the furnace under this condition could lead to serious property damage personal injury or loss of life If soot is observed on the vent immediately shut the furnace down and contact a qualified service agency Listed below are several safety related items that you should follow during the heating season to assure continued safe operation of the furnace 4 Inspect furnace venting Venting must be free of obstructions void of scot and properly terminated to the atmosphere WARNING Do not 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 our safety only factory authorized parts to be used on your furnace 2 Periodically observe the main burner flame to assure it is burning with a hard blue flame with well defined burner ports See Figure 6 If flame appears yellow or burner has a lazy flame
12. ed if the thermostat is raised and the motor fails to operate within 60 seconds B COMPLAINT EXCESSIVE NOISE 1 Motor or blade out of balance Replace motor or blade 2 Motor hum Replace motor C COMPLAINT ERRATIC FAN OPERATION A loose terminal or a defective relay may cause the motor to cycle off while the thermostat is calling for heat An outage will occur because the blower is not purging the system of combustion products HIGH ALTITUDE DERATION These units are certified by the Canadian Gas Association for operation without Modification at altitudes up to 4500 feet Operation at increased elevations require deration of 4 for each 1000 feet above sea level Example At 8 000 feet derate furnace 32 If the unit is not properly derated the following conditions will exist 1 Due to the lack of sufficient oxygen for proper combustion carbon monoxide will be produced and exhausted through the vent Entry of these fumes into the vehicle due to improper installation of the vent or through another opening in the vehicle exterior could create a hazardous condition which could endanger the life of anyone exposed to these fumes for a prolonged period of time 2 Due to incomplete combustion of LP gas at the burner the actual heat output of the furnace will be considerably less than the rating of the unit Fuel which is not burned will be wasted If the unit is properly derated it will produce approximately the same amount o
13. f heat at higher elevations but will do so with considerably less fuel Consult with local gas company your dealer or RV service agency for proper orifice size when derating unit Change out of orifice should be done by your dealer or a qualified service agency DIRECT SPARK IGNITION SYSTEM The direct spark ignition system consists of a solid state printed circuit control module an electrode assembly a 12 volt gas control and connecting high and low voltage wires To ignite the burner it is necessary only to set the thermostat above room temperature The thermostat in series with the microswitch powers the ignitor to simultaneously open the main burner valve and provide the ignition spark Should the flame not be established within a period of 15 seconds the system provides safety shut down Electronic flame sensing circuitry in the ignitor detects the presence or absence of main burner flame If the flame is not established during the Flame Establishing Period 6 seconds the system closes the gas valve and locks out To reactivate ignition if lock out has occurred set the thermostat to the OFF position for 4 to 5 seconds then reset to the ON position TROUBLE SHOOTING GUIDE CAUTION Servicing this device should only be performed by a qualified serviceman with due regard for safety as improper actions could result in a hazardous condition resulting in serious injury or death WARNING Do not apply power to controf
14. fe threatening and corrected immediately Extinguish any open flames including cigarettes and evacuate all persons from the vehicle 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 on ignition 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 Clothing or other flammable material should not be placed on or near the appliance 14 Always follow the Operating Instructions Do not deviate from the step by step procedures 15 In any installation in which the vent of this appliance can be covered due to the construction of 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 16 When considering add on rooms porch or patio attention must be given to the venting of your furnace For your safety do not terminate furnace vent inside add On rooms screen porch or o
15. nd 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 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 replacement heat exchanger will be provided under the same conditions as stated in the two year warranty EXCEPT no labor reimbursement will be provided LIMITATION OF WARRANTIES ALL IMPLIED WARRANTIES INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY ARE HEREBY LIMITED IN DURATION TO THE PERIOD FOR WHICH EACH LIMITED WARRANTY IS GIVEN SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU THE EXPRESSED WARRANTIES MADE IN THIS WARRANTY ARE EXCLUSIVE AND MAY NOT BE ALTERED ENLARGED OR CHANGED BY ANY DISTRIBUTOR DEALER OR OTHER PERSON WHOMSOEVER SUBURBAN WILL NOT BE RESPONSIBLE FOR 1 Norm
16. nto patios Doing so will result in products of combustion being vented into the room or occupied areas T YELLOW IN 1 THO ELAN DISTINCT BLUE MANTLE ABOVE PIRTS Figure 6 TO REMOVE FURNACE FOR SERVICE Remove the front grille Disconnect wiring Disconnect gas supply Be sure gas supply to the unit is turned off Remove screws securing furnaces to cabinet Remove the vent cap screws outside and remove vent assembly Pull furnace forward and remove TO REMOVE BURNER amp GAS VALVE Shut off gas supply Disconnect electrical supply Remove front grille Remove nuts holding burner access door and remove door Remove nut holding burner in place Raise burner off mounting pin and remove Burner orifice may now be serviced with long extension and 1 2 socket To replace gas valve remove manifold mounting screws and remove manifold rom furnace Place manifold in a vise to remove gas valve WH h FURNACE ASSEMBLY REMOVED 7 DSI BOARD lt RAD oh MOUNTING SORDS S SS A j SN AK A ry N PSG SA DUANER COSERVATION S008 Z PNY Z Z M GAS FITTING Figure 7 TO REPLACE BURNER 1 Center orifice end of burner over orifice slide other end over burner mounting pin 2 Reassemble nut over burner mounting stud until it is firmly against burner 3 Reinstall burner access door and
17. ons for operating and maintaining the furnace Keep with unit at all times Should you require further information contact your dealer or nearest Suburban Service Center WARNING Installation of this appliance must be made in accordance with the written instructions provided in this manual No agent 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 WARNING Improper installation adjustment alteration service or maintenance can cause property damage personal injury or loss of life Refer to the installation instructions and or owners manual provided with this appliance WARNING If the information in this manual is not followed exactly a fire or explosion may result causing property damage personal injury orloss of life Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Extinguish any open flame Evacuate all persons from the vehicle Shut off the gas supply at the gas container or source Do not touch any electrical switch or use any phone or radio in the vehicle Do not start the vehicle s engine or electric generator Contact the nearest gas supplier or qualified service technician for repairs If you cannot reach a gas supplier or qualified service technician contact the neare
18. operates properly for a period of time but randomly shuts down during the duty cycle or will not operate during cold starts check the flame proving circuit sensor wire with a D C Microamp Meter The current may cause nuisance tripping If this condition is experienced the electrode location should be checked to make sure the sensor electrode is in the flame G The solid state control module is not field repairable Any modifications or repairs will invalidate the warranty and agency certifications ALL WIRES ARE 18 AWG UNLESS OTHERWISE SPECIFIED NOTE IF ANY OF THE ORIGINAL WIRES AS SUPPLIED WITH THE APPLIANCE MUST BE REPLACED IT MUST BE REPLACED WITH WIRING MATERIAL HAVING A TEMPERATURE RATING OF AT LEAST 105 C 16 30 TGS 150 C 18 AWG WIRE j A NO 18 250 C RADIX WIRE UL 3257 Figure 10 URDER USING NO LISTED ON VENT COMMANDE SELON NUMERO INDIQU SUR LA BOUCHE DE D ECHARGE Figure 11 REPLACEMENT PARTS LIST MODEL DD 17DSI Only factory authorized parts are to be used Do not attempt to repair defective parts When ordering repair parts from your dealer a Suburban Service Center or a distributo give the following information 1 Part Number Not ltem No 2 Part Description 3 Model and Serial Number of Furnace 4 Number of Parts Required r always Item Part No Description Number 1 Thermostat ES a WT an kasa 161154 2 Screw 2 Required oc s
19. or reaches approximately 75 of its normal r p m within 1 to 2 seconds the microswitch in response to the air flow will engage allowing current flow to the module board 3 After a 15 30 second delay the gas valve will open and allow gas to the main burner The spark produced from the ignitor electrode ignites the main burner 4 When the thermostat is satisfied or turned back the gas valve will close and the flame on the main burner will go out The blower will continue to run for a short period of time and will then shut off The purpose of this is to remove most of the remaining gases and heat from the heat exchanger Figure 1 LIMIT SWITCH The purpose of the limit control is to turn off the gas to the main burner if for any reason the furnace becomes abnormally hot If the circulating air is blocked even partially the limit control will function and cause the main burner to cycle If cycling of the limit control occurs the circulating air passage should be thoroughly cleaned If the limit control is damaged it cannot be repaired It must be replaced with a new one CAUTION Never short across or bypass the limit control even for only temporary operation MICROSWITCH The microswitch has two purposes 1 Itis an air prover It operates in response to the flow of air generated by the fan Hence if for any reason the air from the fan is not sufficient the switch will not operate One cause of insufficient air is a slow m
20. otor caused by low voltage 2 The switch allows time for the blower to pull in a sufficient amount of air to support combustion before it engages Once it engages the gas valve opens gas flows to the main bumer and ignition occurs BLOWER ASSEMBLY One motor is used to drive both the combustion air wheel and the circulating air fan blade Although one motor drives both the wheel and fan blade are separate The combustion air blower is sealed so as to allow no passage of air between it and the circulating room air fan The combustion air blower draws air from the outside atmosphere discharges it into the combustion chamber and forces the combustion products out the exhaust tube The circulating room air fan blade pulls return air in and forces it across the heat chamber discharging it into the area to be heated Figure 2 F COMBUSTION BLOWER AND FAN ASSEMBLY gt 5 LIMIT 5 Zz BURNER OBSERVATION DOOR Figure 5
21. rmostat to lowest setting then move lever to OFF position 2 Turn off all electric power to the appliance if service is to be performed 3 Turn shut off valve to OFF Do not force MAINTENANCE AND CLEANING WARNING If the user of this appliance fails to maintain it in the condition 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 and or the production of carbon monoxide exists which can cause personal inju damage or loss of life CAUTION Label all wires before disconnecting for servicing Proper polarity must be observed so the furnace motor will run with the proper direction of rotation to insure correct air delivery See wiring diagram CAUTION Label alt wires prior to disconnection when servicing controls Wiring errors can cause 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 Particular attention should be given to the following items 4 Inspect furnace installation and vent termination to be sure furnace is properly secured in place See Installation Instructions that vent terminates to the atmosphere and that vent tubes overlap properly See Installing Vent Assembly 2 Inspect chamber
22. s the short is exterior to the furnace 5 GAS SUPPLY Be sure gas supply is on 6 THERMOSTAT OFF Check to be sure thermostat is properly wired and is calling for heat 7 MALFUNCTIONING MICROSWITCH Be sure the microswitch is moving far enough to close its contacts If the switch is not closing clean any dust or dirt from the actuator pin Other reasons for switch not operating are a Insufficient fan speed slow motor due to low charged battery faulty motor or lint and dust accumulation restricting return air to furnace Check wiring in accordance with units wiring diagram to assure that the proper polarity of the 12 Volt DC power supply is observed On certain models this polarity must be observed so the motor will run the proper direction of rotation to insure correct air delivery b Faulty Microswitch Replace switch if valve does not open when switch is engaged Switch should also be replaced if battery is fully charged and with the fan motor running at top speed the switch fails to engage within 3 to 4 seconds NOTE To service switch heating assembly must be pulled out 8 GAS CONTROL VALVE With test light check vaive t rminals If voltage is present but valve is not opening when microswitch engages replace control valve 9 FAN NOT OPERATING Check for burned out motor or loose wiring terminals 10 DEFECTIVE FAN RELAY Relay may be at fault if motor fails to start when thermostat calls for heat This can be suspect
23. st fire department Do not turn on the gas supply until the gas leak s has been repaired Installation and service must be performed by a qualified installer service agency or the gas supplier Form No 2571 C SUBURBAN MANUFACTURING COMPANY Post Office Box 399 Dayton Tennessee 37321 CERTIFIED Due to high temperatures the unit should be located out of traffic and away from furniture and draperies Children and adults should be alerted to the hazards of high surface temperatures and should stay away to avoid burns or clothing ignition Young children should be carefully supervised when they are in the same room as the unit Clothing or other flammable material should not be placed on or near the unit Any safety screen or guard removed for servicing the unit must be replaced prior to operating the unit The area around the unit must be kept clear from combustible materials gasoline and other flammable vapors and liquids Installation and repairs should be done by a qualified service person The unit should be inspected before use and at least annually by a qualified service person More frequent cleaning may be required due to excessive lint from carpeting bedding material etc It is imperative that control compartments burners and circulating air passageways of the unit be kept clean WARNING This unit must be serviced only by a qualified serviceman Modification of the appliance can be extremel
24. to replace any part of the contro system and any gas control which has been under water OPERATING INSTRUCTIONS 1 STOP Read the safety information above on this label 2 Set the thermostat to lowest setting 3 Turn off all electric power to the appliance 4 The appliance is equipped with an ignition device which automatically lights the burner Do not try to light the burner by hand 5 Turn shut off valve to OFF This furnace is equipped with a valve shut off switch With switch in OFF position gas will not flow to burner nor will the furnace operate 6 Wait five 5 minutes to clear out any gas Then smell for gas including near the floor If you then smell gas STOP Follow B in the safety information above on this label if you don t smell gas go to next step 7 Turn on all electric power to the appliance These units are for use with LP gas only LP gas is heavier then air Therefore to better clear out any gas the heater should be operated for five 5 minutes with the blower on and the gas off 8 Turn shut off valve to ON 9 Set thermostat to desired setting 10 If the appliance will not operate follow the instructions To Turn Off Gas to Appliance and call your service technician or gas supplier NOTE If the furnace should lock out the blower will go off in 5 minutes and remain off until unit is reset by reactivating thermostat TO TURN OFF GAS TO APPLIANCE 1 Set the the
25. us s ua DAs eben RSNA A BERS 121717 3 Brace Combustion Air Housing r ene 062945 4 Intake Air Cup Assembly nonono ee 051288 5 Housing Combustion Air Front bs Serie g 5504 390536 6 Gasket Combustion Air Housing Front sasa a a N N kupacha hu sl des 070862 7 Nut 2 56 2 Required bash aqa asa Glin 121951 8 Microswitch eh ee ee ee AE Y 231930 9 Screw 2 zulu serene p hae sa Ee PAE ER S Ra 121247 10 Panel Assembly Combustion Air 390537 11 Combustion Air Housing 390535 12 Vent Assembly Order by Part No listed on vent assembly supplied with furnace If Part No label is not attached contact SUBURBAN MFG CO 13 Scfew 8 Required us u ced nia ass apu Madan hh nae te hale 121717 14 Gomes gaan a aaa 121715 15 Wheel Combustion Air cerre eier ti eee 350126 16 Gasket Combustion Air Housing Rear 070906 17 Gasket Burner Tunnel 2 2 20 0 eee asua 070859 18 Gasket Motor aa un nipae Ses qS a S 070849 19 yunpa dept saa Derg P Akis eRe AGMA ES e 231916 20 Impeller Room 350125 21 Burner Tunnel Assembly 051159 22 BUMMER oh ohne be asa ae a tees S
26. y hazardous and could lead to serious injury or death Fuel burning appliances generate toxic flue products Modification or improper maintenance can cause carbon monoxide in deadly amounts To prevent this maintain appliance in safe operating condition DO NOT Block or modify any combustion air or flue gas passageways Add any devices or accessories to this appliance except those specifically authorized by Suburban Manufacturing Co 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 used on your furnace Consult a qualified serviceman for any problems or questions you may have pertaining to this appliance Inspect the appliance before starting a new heating season paying special attention to combustion air flue gas passageways and gas lines DO NOT OPERATING INSTRUCTIONS Direct Spark Ignition WARNING Be sure the furnace and all ignition systems are OFF during any type of refueling and while vehicle is in motion or being towed IMPORTANT Failure to follow these lighting instructions exactly may result in damage to the unit WARNING Do not operate furnace while vehicle is in motion or being towed SEQUENCE OF NORMAL OPERATION 1 When the thermostat calls for heat the fan motor is energized 2 As the fan mot
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