AIRXCEL Suburban Gas Furnaces
This book contains instructions covering the operation and maintenance of your furnace. Keep with unit at all times. 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
Safety Instruction
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| 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. |
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| 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. |
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| 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
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| — 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
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| Failure to follow instructions could result in severe personal injury or death due to carbon-monoxide poisoning, if combustion products infiltrate into the building. Check that all openings in the outside wall around the vent (and air intake) pipe(s) are sealed to prevent infiltration of combustion products into the building. Check the furnace vent (and air intake) terminal(s) are not obstructed in any way during all seasons. |
MAINTENANCE AND CLEANING
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| 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 injury, property damage or loss of life. |
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| Label all wires prior to disconnecting for servicing and servicing controls. Wiring errors can cause improper and dangerous furnace operation. 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). Always verify proper operation of furnace after servicing. |
Always verify proper operation of furnace after servicing.
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 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.
- Inspect furnace venting. Venting must be free of obstructions, void of soot and properly terminated to the atmosphere. (Refer to installation manual.)
WARNINGDo 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 your safety, only factory authorized parts are to be used on your furnace. - 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.
- Periodically observe the main burner flame to assure it is burning with a hard blue flame with well defined burner ports (See Figure 2). If flame appears yellow or burner has a lazy flame, shut furnace down. It is possible that burner needs cleaning or replaced. If excessive rust and corrosion are present on burner surface, the burner must be thoroughly cleaned or replaced. The burner may be cleaned using a steel wire brush and blown clean using high compression air. Contact a qualified service person for assistance.
NOTE: To properly observe burner operation, the furnace must be removed. This should only be done by your dealer or a qualified service agency.
- 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.
- The motor is permanently lubricated and requires no oiling.
- Keep the furnace area clear of any combustible materials, gasoline or other flammable vapor and liquids.
- 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.
- 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.
- 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 life threatening and corrected immediately. Extinguish any open flames including cigarettes and evacuate all persons from the vehicle. Shut off gas supply at Propane gas bottle. (See safety notice on front cover of this manual.)
- Immediately shut furnace down and call a service agency if furnace cycles erratically or delays on ignition.
- Never attempt to repair damaged parts. Always have them replaced by a qualified service agency.
- Never attempt to repair the furnace yourself. Seek the help of a qualified service person.
- Never restrict the ducting installed by your trailer manufacturer. To do so could cause improper furnace operation.
- Avoid direct contact with the outlet registers or vents as they will become hot during the heating cycle.
- 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.
- Clothing or other flammable material should not be placed on or near the appliance.
- Always follow the Operating Instructions. Do not deviate from the step-by-step procedures.
- 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 onto patios. Doing so will result in products of combustion being vented into the room or occupied areas. - 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.
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:
- Inspect furnace installation and vent termination to be sure furnace is properly secured in place, that vent terminates to the atmosphere and that vent tubes overlap properly. (See installation manual supplied with furnace.)
- Inspect chamber 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. - Check the base on which furnace is mounted. Be sure it is physically sound, void of any sagging, deterioration, etc.
- Inspect furnace, the venting, ducting and the gas piping to furnace for obvious signs of deterioration. Correct any defects at once.
- 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 expelled to the outside atmosphere not be obstructed. Any soot or loose debris should be blown out using compressed air. (See Figure 3.)
OPERATING INSTRUCTIONS
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| Do not operate furnace while vehicle is in motion or being towed. |
NOTE: During initial firing of this furnace a burn-off of excess paint and oils remaining from manufacturing process may cause “smoking” for 5 – 10 minutes.
FOR YOUR SAFETY READ BEFORE OPERATING
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| 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.
- 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.
C. Do not use this furnace if any part has been under water. A flood damaged furnace is extremely dangerous. Attempts to use the furnace can result in fire or explosion. A qualified service agency should be contacted to inspect the furnace and to replace all gas controls, control system parts, electrical parts that have been wet or the furnace if deemed necessary.
OPERATING INSTRUCTIONS
- STOP! Read User’s Information Manual supplied with furnace.
- Turn the manual valve (if so equipped) or the valve at the outside Propane tank to the “OFF” position. Do not force.
- Set thermostat above room temperature to begin blower operation. A slight delay will occur before the blower comes on. Allow blower to run for 5 minutes for combustion chamber purge cycle. If blower does not come on or stops before ignition cycle, go to shut down and contact your dealer or a local recreational vehicle service agency.
- After 5 minutes, move thermostat lever below room temperature. Blower will remain on. Wait approximately 2 minutes for blower to go off.
- Open manual shut-off valve (if so equipped) or the valve at the outside propane tank. Correct operating characteristics depend on the valve being positioned fully open. Never attempt to operate with a valve partially closed.
NOTE: 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. SF SERIES Models, see Figure 4A. SH Series models, see Figure 4B.
- Set thermostat to desired setting. NOTE: Motor will not start instantly. Allow approximately 30 seconds for motor operation.
- Allow 30 seconds for main burner to light after blower turns on. This furnace is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.
- If burner does not light, repeat Steps 1 through 8.
- If after three (3) attempts with no ignition, 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 attempt to get ignition. NOTE: If 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 thermostat 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 manual valve (if so equipped) to the “OFF” position. Do not force.
Documents / Resources
 | AIRXCEL Suburban Gas Furnaces [pdf] User Manual Suburban Gas Furnaces, SF-20Q, SF-25Q, SF-30Q, SF-35Q, SF-42Q, SF-20FQ, SF-25FQ, SF-30FQ, SF-35FQ, SF-42FQ, SFV-35Q, SFV-42Q, SFV-35FQ, SFV-42FQ, SH-35, SH-42, SH-35F, SH-42F, SF-20VHQ, SF-20VHFQ, SF-25VHQ, SF-25VHFQ, SF-30VHQ, SF-30VHFQ, SF-35VHQ, SF-35VHFQ |
Airxcel | AC, Heating & Appliances for Industrial and Personal Use
