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 Suburban Manufacturing Company.
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.
FOR YOUR SAFETY
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
nearest fire department.
• Do not turn on the gas supply until the
gas leak(s) has been repaired.
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.
FOR YOUR SAFETY
DO NOT STORE OR USE GASOLINE
OR OTHER FLAMMABLE VAPORS AND
LIQUIDS IN THE VICINITY OF THIS OR
ANY OTHER APPLIANCE.
Part Number 204638
10-23-08
SUBURBAN GAS FURNACES
INSTALLATION INSTRUCTIONS FOR
MODELS
SF-20 • SF-25 • SF-30 • SF-35 • SF-42
SUBURBAN MANUFACTURING COMPANY
WARNING! Improper installation, adjust-
ment, alteration, service or maintenance
can cause property damage, personal in-
jury or loss of life. Refer to the installation
instructions and/or owners manual pro-
vided with this appliance. Installation and
service must be performed by a qualified
installer, service agency or the gas sup-
plier.
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.
INSTALLATION INSTRUCTIONS
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.
These furnaces are designed and installed in such a manner as to be removable
only from the exterior of the recreational vehicle.
CAUTION: If possible, do not install the furnace to where the vent can be
covered or obstructed when any door on the trailer is opened. If this is not
possible, then the travel of the door must be restricted in order to provide
a 6" minimum clearance between the furnace vent and any door whenever
the door is opened.
NOTE: The exhaust temperature of this furnace could discolor or warp some
materials. You should verify that the material used on the coach door, panel, or
cover will not discolor or warp from the exhaust temperature whenever any door,
panel, or cover is in the open position.
CAUTION: Due to the differences in vinyl siding, this appliance should not 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.
CAUTION: 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
676 Broadway Street
Dayton, Tennessee 37321
423-775-2131
www.rvcomfort.com