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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.
MANUAL FOR FUTURE REFERENCE. 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
FIRE, EXPLOSION AND
ASPHYXIATION HAZARD
Improper
adjustment,
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.
PN: 205876
08-06-2019
SUBURBAN GAS FURNACES
INSTALLATION INSTRUCTIONS FOR MODELS
SF-20Q • SF-25Q • SF-30Q • SF-35Q • SF-42Q
alteration,
service,
CONSUMER: RETAIN THIS
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.
676 Broadway Street
Dayton, Tennessee 37321
423-775-2131
www.AIRXCEL.com
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Summary of Contents for Airxcel Suburban SF Series
- Page 1 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.
-
Page 2: For Your Safety
WARNING CAUTION CARBON-MONOXIDE POISONING HAZARD If possible, do not install the furnace to where the vent can be covered or obstructed when any door on the Failure to follow instructions could result trailer is opened. If this is not possible, then the travel in severe personal injury or death due to of the door must be restricted in order to provide a 6”... - Page 3 NOTE: These furnaces shall be installed so the electrical components are protected INSTALLATION NOT AGAINST OUTER PANEL OR SKIN AND “X” from water. DIMENSION GREATER THAN 1 ½” (See Figures 3, 5) (Exterior panel supplied by installer) These furnaces are design certified for propane gas only. Do not attempt to convert to natural gas.
- Page 4 Connect the gas supply to the furnace at the manifold, following the suggestions Left Right Exhaust and Model Front Bottom Back outlined below. It will be necessary to hold the flare fitting on the furnace manifold Side Side Intake Tube when connecting or loosening gas line.
- Page 5 Make the duct connections at the furnace cabinet tight. Loose connections will Inspect furnace, the venting, ducting and gas piping to furnace for obvious result in overheating of the component parts on the furnace and a reduction of signs of deterioration. Correct any defects at once. the heated air flow through the duct system.
- Page 6 Check gas connections for leaks using a soap and water solution. Correct any gas leaks immediately. To obtain information on locating a local service agency, contact: Reinstall module board and panel assembly. AIRXCEL, Inc., Suburban Division Reconnect electrode wire to board Customer Service Department Reconnect power supply to board.
- Page 7 OUTSIDE SKIN (PANEL) VENT CAP AND EXHAUST TUBE INTAKE TUBE VENT CAP AND INTAKE TUBE EXHAUST 3 3 " 2 1 " CAULK BEHIND VENT CAP AS SHOWN TO SEAL SEE DETAIL "A" BETWEEN EXHAUST AND INTAKE AND TO (2) 2 3/4" PREVENT MOISTURE INSIDE FURNACE DIA.
- Page 8 VENT CAP AND EXHAUST TUBE OUTSIDE SKIN (PANEL) TUBE, INTAKE AIR TUBE, AIR INTAKE VENT CAP AND EXHAUST 3 3 " 2 1 " SEE DETAIL "A" INSIDE WALL CAULK BEHIND VENT CAP AS SHOWN TO SEAL BETWEEN EXHAUST AND INTAKE AND TO PREVENT MOISTURE INSIDE FURNACE (2) 2 1/4"...
- Page 9 FURNACE TIE-DOWN SCREW (FURNACE TO CABINET) OUTSIDE SKIN CAULK ALONG THE EDGE OF THE CUTOUT (ALL THE WAY AROUND) ANCHOR FURNACE CABINET TO COACH FLOOR (2) PLACES AS ILLUSTRATED BACK OF CABINET MUST BUTT AGAINST THIS EDGE OF THE FRAME DOOR FRAME CAULK BEHIND VENT CAP AS SHOWN TO SEAL BETWEEN EXHAUST AND INTAKE AND TO PREVENT...
- Page 10 VALVE SAIL LIMIT VALVE SWITCH SW. N.C. SWITCH N.C. N.O. BL/WH BL/WH MODULE BOARD POWER BLOWER GROUNDING TERMINAL LIMIT SAIL VALVE MOD. T'STAT ELECTRODE BRD. VALVE 12 VOLTS D.C MOTOR CODE COLOR ALL WIRES ARE 18 AWG UNLESS OTHERWISE SPECIFIED CAUTION: DO NOT HI-POT NOTE: IF ANY OF THE ORIGINAL WIRES AS SUPPLIED...
- Page 11 INCORRECT INCORRECT Figure 9 CORRECT Figure 10...
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Page 12: Two Year Limited Warranty
Transportation of the RV 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 current listing of recommended service centers may be obtained from Suburban’s website, www.AIRXCEL.com. If you cannot locate a recommended service center locally, the service agency chosen to perform warranty repairs must contact our Service Department at 423-775-2131 for authorization before making repairs.
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