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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

FIRE, EXPLOSION AND

ASPHYXIATION HAZARD

Improper adjustment, alteration, service, 

maintenance or installation can cause serious 

injury or death.

Read and follow instructions and precautions 

in User’s Information Manual provided with 

this furnace.  Installation and service must be 

performed by a qualified service agency or the 

gas supplier.

 

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.

 

WARNING

FIRE OR EXPLOSION HAZARD

Failure to follow safety warning exactly 

could result in serious injury, death or 

property damage.
— 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

• 

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 nearest 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.

SUBURBAN GAS FURNACES

 

INSTALLATION INSTRUCTIONS FOR MODELS

SF-20Q • SF-25Q • SF-30Q • SF-35Q • SF-42Q

SF-20FQ • SF-25FQ •SF-30FQ •SF-35FQ •SF-42FQ

The design of the furnace has been listed for installation in recreational vehicles only. In order for the 

furnace to operate in conformity with generally accepted safety regulations, the installation instructions 

must be followed. Failure to comply with the installation instructions will void the warranty on the 

furnace and any responsibility on the part of AIRXCEL, INC. - SUBURBAN DIVISION.

The furnace was inspected before it left the factory. If any parts are found to be damaged, do not 

install the furnace. Immediately contact the transportation company and file a claim.

This  book  contains  instructions  covering  the  operation  and  maintenance  of  your  furnace.  

INSTALLER: LEAVE THIS MANUAL WITH THE APPLIANCE.  CONSUMER: RETAIN THIS 

MANUAL FOR FUTURE REFERENCE.  Should you require further information, contact your 

dealer or nearest Suburban Service Center.

676 Broadway Street 

Dayton, Tennessee 37321

423-775-2131

www.AIRXCEL.com

PN: 205876

08-06-2019

Summary of Contents for Suburban SF Series

Page 1: ...ctric 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 nearest fire department Do n...

Page 2: ...t be installed on vinyl siding without first consulting with the manufacturer of the siding or cutting the siding away from the area around the appliance vent In any installation in which the vent of...

Page 3: ...ied by installer Maximum wall thickness for this type installation is 2 1 Locate the furnace near lengthwise center of the coach 2 Choose a location for installation out of the way of wires pipes etc...

Page 4: ...essure equal to or less than 1 2 PSIG 1 A 3 8 male flare connection is provided for gas line hookup Some standards may require the use of a manual shut off valve in the gas line external to the furnac...

Page 5: ...f intake combustion air and the flow of exhaust gases being expelled to the outside atmosphere not be obstructed Any soot or loose debris should be blown out using compressed air See Figure 8 6 Inspec...

Page 6: ...alve at the outside Propane tank to the OFF position Do not force 3 Set thermostat above room temperature to begin blower operation A slight delay will occur before the blower comes on Allow blower to...

Page 7: ...L 2 2 3 4 DIA HOLES CL X INTAKE 1 2 MINIMUM OVERLAP EXHAUST 1 1 4 MINIMUM OVERLAP 2 3 4 DIA 2 3 4 DIA C L L C EXHAUST INTAKE 0 TO 1 1 2 520768 520968 520551 TRAILER SKIN VENT CAP MOUNTING SURFACE NEVE...

Page 8: ...IS ESSENTIAL DETAIL A VENT CAP AND EXHAUST TUBE INTAKE AIR OUTSIDE SKIN PANEL SF 20FQ SF 25FQ SF 30FQ SF 35FQ SF 42FQ STANDARD VENT INSTALLATION X INTAKE 1 2 MINIMUM OVERLAP EXHAUST 1 1 4 MINIMUM OVE...

Page 9: ...GE OF THE FRAME DOOR FRAME INTAKE TUBE 6 SCREWS SUPPLIED VENT CAP EXHAUST TUBE 4 SCREWS DOOR MOUNTING FURNACE ACCESS DOOR SECURE FRAME TO OUTER PANEL WITH SCREWS 16 PLACES GAS CONNECTION ELECTRICAL CO...

Page 10: ...ITH WIRING MATERIAL HAVING A TEMPERATURE RATING OF AT LEAST 105 C CAUTION DO NOT HI POT DIELECTRIC HIGH VOLTAGE TEST THIS UNIT AFTER INSTALLATION TO DO SO MAY CAUSE COMPONENT DAMAGE AND VOIDS WARRANTY...

Page 11: ...11 Figure 9 INCORRECT INCORRECT CORRECT Figure 10...

Page 12: ...TIES 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 W...

Page 13: ...iqu es pour la garantie de deux ann es L EXCEPTION que Suburban ne remboursera aucun frais de main d oeuvre LIMITATION DES GARANTIES LA P RIODE DE VALIDIT DES GARANTIES IMPLICITES CECI INCLUANT LES GA...

Page 14: ...alement le ventilateur et les organes de commande il ne doit rester que la chambre de combustion comme on le voit sur l illustration Injecter de l air comprim dans la chambre selon les indications des...

Page 15: ...EURS NOTE S IL EST NECESSAIRE DE REMPLACER CERTAINS CALIBRE 18 POUR TOUS LES CONDUCTEURS SAUF D AU MOINS 105 C INDICATION DIFFERENTE Figure 7 2 M A X C L 9 7 6 4 1 8 3 2 7 8 9 3 2 TUBE D ADMISSION D A...

Page 16: ...TUBE D ADMISSION D AIR BOUCHES D ADMISSION D AIR D CHARGE AVEC TUBE DE D CHARGE PANNEAU EXTERNE Figure 4 SF 20FQ SF 25FQ SF 30FQ SF 35FQ SF 42FQ INSTALLATION STANDARD DU SYST ME D ARRIV E ET DE D CHA...

Page 17: ...BOUCHE D ADMISSION D AIR D CHARGE PANNEAU EXTERNE L C Figure 2 X ARRIVE 1 2 POUNCE MINIMUM DE CHEVAUCHEMENT D CHARGE 1 1 4 POUNCES MINIMIMUM DE CHEVAUCHEMENT 2 3 4 DIA 2 3 4 DIA C L L C D CHARGE ARRIV...

Page 18: ...rrupteur d arr t est en position ON pour un fonctionnement correct 6 R gler le thermostat pour la temp rature d sir e Si cette temp rature est sup rieure celle de la pi ce le ventilateur se met en mar...

Page 19: ...ais tenter de r parer l appareil de chauffage Confier ces travaux un technicien comp tent 12 Ne jamais r duire la taille des conduits install s par le constructeur du v hicule Ceci susciterait un fonc...

Page 20: ...it traverse une paroi de mat riaux combustibles comme la paroi d un placard du v hicule maintenir un espacement d au moins 1 4 po voir Figure 3 REMARQUE L espacement peut tre nul dans le cas de condui...

Page 21: ...ouclier anti pluie fourni voir figure 1 d tail A Ne pas modifier le syst me d vacuation fourni avec cet appareil de chauffage Toute modification provoquera une d ficience de l installation pouvant sus...

Page 22: ...etc qui pourrait interf rer avec l installation Respectez les distances minimales entre l armoire et la construction combustible indiqu es dans le tableau 2 Reportez vous la figure 1 pour voir les d g...

Page 23: ...u e lors de l ouverture d une porte du v hicule Si ceci n est pas possible on doit limiter le mouvement d ouverture de la porte afin qu il y ait un espacement libre de s curit d au moins 6 po entre la...

Page 24: ...aves ou la mort Suivre les instructions et les consignes qui figurent dans la notice d utilisation qui accompagne ce g n rateur d air chaud L installation et l entretien doivent tre effectur s par un...

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