Airxcel Suburban SF-20Q User Manual

676 Broadway Street
Dayton, Tennessee 37321
423-775-2131
www.AIRXCEL.com
PN: 205881
05-19-2020
SUBURBAN GAS FURNACES
USER’S INFORMATION MANUAL For Models
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
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.
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 qualied 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
ammable 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 o󰀨 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
qualied service technician for repairs.
• If you cannot reach a gas supplier or
qualied service technician, contact
the nearest re department.
• Do not turn on the gas supply until the
gas leak(s) has been repaired.
— Installation and service must be
performed by a qualied installer, service
agency or the gas supplier.
ANSI Z21.47-2016 | CSA 2.3-2016

Airxcel Suburban SF-20Q Specifications

General

Model	SF-20Q
Type	Furnace
Heating Capacity	20, 000 BTU
Fuel Type	Propane
Ignition	Electronic
Voltage	12V DC
BTU Input	20, 000 BTU
Ignition Type	Direct Spark Ignition

Summary

Suburban Gas Furnaces User's Information Manual

General Safety Warnings

Covers fire, explosion, asphyxiation hazards, and carbon monoxide poisoning risks.

Installation and Service Requirements

Emphasizes that installation and service must be performed by qualified agencies or gas suppliers.

Gas Leak Detection and Response

Provides critical steps to follow upon smelling gas, including evacuation and contacting professionals.

Refueling and Towing Safety

Instructs to turn off the furnace and ignition systems during refueling or when the vehicle is in motion.

Maintenance and Cleaning

Carbon Monoxide Poisoning Hazard

Warns of severe injury or death from carbon monoxide infiltration from combustion products.

Appliance Maintenance Responsibility

Stresses that failure to maintain the appliance risks fire and carbon monoxide production.

Servicing and Wiring Precautions

Advises labeling wires, observing motor rotation, and verifying operation post-service.

Vent and Part Safety

Warns against vent screens and recommends using only factory-authorized parts for safety.

Furnace Operation and Safety Checks

Details periodic inspections for vent obstructions, soot, burner flame, and keeping the furnace clean.

Operating Instructions

Pre-Operation Safety Checks

Covers inspecting furnace installation, vent termination, chamber, and base for soundness and defects.

Combustion Airflow Requirements

States the imperative need for proper venting to atmosphere and drawing combustion air from outside.

Initial Firing and Burn-off

Notes that initial firing may cause smoking due to manufacturing residues, lasting 5-10 minutes.

Pilotless Ignition and Gas Smell

Explains the automatic ignition system and reiterates gas smell detection procedures.

Flood Damage Warning

Warns against using a furnace that has been submerged due to extreme danger of fire or explosion.

Furnace Startup and Shutdown Procedures

Furnace Startup Procedure

Step-by-step guide for starting the furnace, including thermostat settings and blower operation.

Burner Flame Observation

Describes how to observe the burner flame for correct blue color and identifies signs of improper operation.

Ignition Failure and Lockout

Details actions to take if ignition fails after multiple attempts and the lockout procedure.

Turning Off Gas to Appliance

Provides instructions for safely shutting off the gas supply to the furnace.