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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
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Manuels Connexes pour Suburban SF-20
Sommaire des Matières pour Suburban SF-20
- Page 1 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.
- Page 2 1. If you wish to make gas connection through the top of cabinet, you must Model Minimum Free (unobstructed) Area remove furnace from cabinet and turn gas inlet fitting 90° CLOCKWISE. DO NOT TURN FITTING COUNTER-CLOCKWISE, this will loosen fitting and SF-20/25/30/35 55 Sq. In. result in a gas leak. SF-42 142 Sq. In.* *May be reduced to 88 sq.
- Page 3 4. Attach vent cap assembly to outer skin of RV with the six (6) screws provided. Do not install vent assembly upside down. The word “Suburban” must be right 7. Slide furnace in place. The back of the furnace should be installed against side up.
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Page 4: Preventive Maintenance
G. Do not install air boosters in the duct system. Such devices will cause the 2. In order to maintain a check of gas supplied pressure to the furnace, Suburban advises furnace to cycle on limit and to have erratic sail switch operation. - Page 5 INSTALLATION AND REMOVAL OF UNIT If soot is observed on the vent, immediately shut the furnace down and contact a qualified service agency. INSTALLED FROM INSIDE TO REMOVE Listed below are several safety related items that you should follow during the 1.
- Page 6 OPERATING INSTRUCTIONS TO SHUT DOWN 1. Set the thermostat to lowest setting, then move lever to “OFF” position. WARNING! Do not operate furnace while vehicle is in motion or being 2. Turn manual shut off valve (if so equipped) to the “OFF” position. Do not force. towed.
- Page 7 Figure 2 Figure 3...
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Page 8: Flashlight
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 MOISTURE INSIDE FURNACE COMPARTMENT. - Page 9 Figure 6 TO CLEAN THE CHAMBER, THE FURNACE MUST BE REMOVED FROM THE CABINET AND THE MANIFOLD. BLOWER ASSEMBLY AND CONTROLS REMOVED LEAVING THE CHAMBER ONLY, AS SHOWN. USING COMPRESSED AIR, BLOW THROUGH THE CHAMBER, AS SHOWN BY ARROWS, TO REMOVE SOOT OR LOOSE DEBRIS. Figure 7...
- Page 10 Figure 8 Figure 9 39 40 Figure 10...
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Page 11: Replacement Parts List
REPLACEMENT PARTS LIST 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 distributor, always give the following information: 1. Part Number (Not Item No.) 2. - Page 12 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.