Suburban NT-34SP - User Manual

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uburban

Manufacturing

Company

]Is

CERTIFIED

USER'S INFORMATION MANUAL

For

Models

NT-24SP NT-30SP NT-34SP

NT-12s NT-16s NT-20s

This book contains instructions covering the operation and

maintenance of your furnace. Keep with unit at all times.

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! Improper installation,

adjustment, alteration, service or

maintenance can cause property damage,

personal injury or loss of life. Refer to the

installation instructions

andlor owners

manual provided with this appliance.

MAINTENANCE AND CLEANING

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

andlor the production of carbon monoxide exists which can cause

CAUTION: Label all wires before disconnecting for servicing. 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.)

CAUTION: Label all wires prior to disconnection when servicing controls.

Wiring errors can cause improper and dangerous furnace operation.

Always verify proper operation of furnace after

servicing.

You, as the ownerluser, should inspect the furnace monthly during the

heating season for presence of soot on vent.

Operat~ng the furnace under this

condition could lead to serious

propew 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.

lnspect furnace venting. Venting must be free of obstructions, void of soot and

properly terminated to the atmosphere. (Refer to installation manual.)

SUBURBAN MANUFACTURING COMPANY

Post Office Box 399

Dayton, Tennessee 37321

ignition systems are "OFF" during any

type of refueling and while vehicle is in

motion or beina towed.

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

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.

Installation and service must be

performed by a qualified installer,

service agency or the gas supplier.

WARNING! Do 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. To Inspect the main burner, remove the four

(4)

screws

(A.

C and

securing the burner access door to the combustion chamber (See

Figure 1) 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 observe flame, cabinet front must be removed. Operation of burner can

then be observed through the viewing window on front of chamber (See Figure 1).

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 appl~ance be kepi

clean.

Form No.

2497-C

Other manuals for Suburban NT-34SP

Service Manual48 pages

Installation Instructions8 pages

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Summary

Maintenance and Cleaning

Inspect Furnace Venting

Check furnace venting for obstructions and soot. Ensure proper termination.

Periodically Inspect Vent

Check furnace vent for obstructions or presence of soot. Shut down if soot is present.

Observe Main Burner Flame

Check main burner flame for proper blue color and defined ports. Clean burner if needed.

Keep Furnace Clean

Maintain cleanliness of control compartments, burners, and air passageways.

Operating Instructions

Safety Before Operation

Read manual, check for gas odor, operate controls by hand, and do not use submerged parts.

What to Do If You Smell Gas

Extinguish flames, evacuate, shut off gas, avoid sparks, contact supplier or fire dept.

Starting and Operating Procedure

Follow step-by-step instructions for thermostat, blower, and burner ignition.

Turning Off Gas to Appliance

Set thermostat to lowest, turn off electric power, and close shut-off valve.

Warranty Information

Two Year Limited Warranty

Covers defects in material and workmanship for two years from purchase date.

Three Year Limited Warranty on Heat Exchanger

Covers heat exchanger defects for third through fifth year after original purchase.

Limitations of Warranties

Excludes normal maintenance, improper installation, abuse, and consequential damages.

Product Problem Procedure

Steps for resolving product issues: check RV manual, contact service center, or manufacturer.

This document is a user's information manual for Suburban Recreational Vehicle (RV) furnaces, specifically models NT-24SP, NT-30SP, NT-34SP, NT-12S, NT-16S, and NT-20S. It provides instructions for operation, maintenance, and safety, along with warranty information.

Function Description

The Suburban RV furnace is designed to provide heating for recreational vehicles. It operates on LP gas and features an automatic ignition device, eliminating the need for a pilot light. The furnace draws combustion air from outside and vents exhaust gases to the atmosphere, ensuring safe operation within the RV. The manual emphasizes the importance of proper installation, maintenance, and adherence to operating instructions to prevent property damage, personal injury, or loss of life due to fire, explosion, or carbon monoxide production.

Important Technical Specifications

The manual does not list specific technical specifications like BTU output, voltage, or current draw for each model. However, it highlights critical operational aspects:

Fuel Type: LP gas.
Ignition System: Automatic ignition device; no pilot light.
Venting: Requires proper venting to the atmosphere for combustion products and drawing combustion air from outside. Screens over the vent are explicitly prohibited as they can restrict airflow and cause unsafe operation.
Electrical Supply: The furnace requires an electrical supply for the blower and ignition system. Users are instructed to turn off all electric power for servicing.
Gas Supply: The furnace connects to the vehicle's LP gas container or source, with a manual shut-off valve.

Usage Features

The manual outlines a clear, step-by-step process for operating the furnace:

Initial Setup: Ensure the manual gas valve (if equipped) or the valve at the outside LP tank is in the "OFF" position.
Blower Purge Cycle: Set the thermostat above room temperature to initiate blower operation. A slight delay occurs before the blower starts. The blower runs for 5 minutes for a combustion chamber purge cycle.
Blower Shut-off: After 5 minutes, move the thermostat lever below room temperature. The blower will remain on for approximately 2 minutes before shutting off.
Gas Supply Activation: Open the manual shut-off valve (if equipped) or the valve at the outside LP tank. The valve must be fully open for correct operation.
Desired Temperature Setting: Set the thermostat to the desired temperature. There will be a delay (approximately 30 seconds) before the motor operates, gas flows, and sparks occur.
Main Burner Ignition: Allow 30 seconds for the main burner to light after the blower comes on. The automatic ignition device lights the burner; manual lighting is not required or permitted.
Troubleshooting Ignition: If the burner does not light, repeat steps 1 through 8. If the appliance still does not operate, users are instructed to follow the "To Turn Off Gas to Appliance" instructions and contact a service technician or gas supplier.
Lock-out Feature: If the furnace locks out, the blower will turn off in 5 minutes and remain off until the unit is reset by reactivating the thermostat.

To turn off the gas to the appliance:

Set the thermostat to the lowest setting, then move the lever to the "OFF" position.
Turn off all electric power to the appliance if service is to be performed.
Turn the shut-off valve to "OFF" without forcing it.

Maintenance Features

The manual provides detailed maintenance instructions crucial for safe and efficient operation:

Monthly Inspection: Users should inspect the furnace monthly during the heating season for soot on the vent. Soot indicates incomplete combustion and an unsafe operating condition. If soot is observed, the furnace must be shut down immediately, and a qualified service agency contacted.
Venting Inspection: Venting must be free of obstructions, void of soot, and properly terminated to the atmosphere. Screens over the vent are strictly prohibited.
Burner Flame Observation: Periodically observe the main burner flame. It should be a hard blue flame with well-defined burner ports (as depicted in Figure 2, "Correct Flame"). A yellow or lazy flame indicates a problem, requiring the furnace to be shut down and the burner cleaned or replaced by a qualified service person. To inspect the burner, the four screws securing the burner access door to the combustion chamber must be removed.
Burner Cleaning: If excessive rust or corrosion is present, the burner must be thoroughly cleaned or replaced. Cleaning can be done with a steel wire brush and high-compression air.
General Cleanliness: Keep the furnace clean, especially control compartments, burners, and circulating air passageways, as excessive lint from carpeting or bedding can accumulate.
Annual Inspection: A qualified service agency should inspect the furnace yearly before the heating season. This includes checking the furnace installation, vent termination, chamber, venting, ducting, gas piping for physical soundness, corrosion, and proper overlap of vent tubes.
Combustion Chamber Inspection: Check for restrictions in exhaust or intake. Soot or loose debris should be blown out using compressed air (as shown in Figure 3).
Gasket Inspection: All gaskets should be inspected for signs of leakage or deterioration and replaced if necessary, as tight gaskets are essential for safe operation.
Return Air Inlet: Ensure return air inlet openings are free of restrictions to assure adequate airflow.
Motor Lubrication: The motor is permanently lubricated and does not require oiling.

Safety Warnings and Precautions:

The manual contains numerous warnings:

Gas Leaks: If gas is smelled, extinguish all open flames, evacuate the vehicle, shut off the gas supply, avoid electrical switches/phones/radios, do not start the vehicle's engine or generator, and contact a gas supplier or qualified service technician (or fire department if unreachable). Do not turn on gas until leaks are repaired.
Flammable Materials: Do not store or use gasoline or other flammable vapors/liquids near the appliance. Clothing or other flammable materials should not be placed on or near the appliance.
Refueling/Motion: Ensure the furnace and all ignition systems are "OFF" during refueling and while the vehicle is in motion or being towed.
Installation/Service: Installation and service must be performed by a qualified installer, service agency, or gas supplier. Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury, or loss of life.
Vent Obstruction: Do not block the furnace vent, especially with an open door or add-on rooms/patios. Never operate the furnace with the vent covered.
Combustion Air/Warm Air Restriction: Do not restrict the flow of combustion air or warm air circulation to the furnace, as this can cause personal injury and/or death.
Damaged Parts: Never attempt to repair damaged parts; always have them replaced by a qualified service agency.
Ducting/Air Boosters: Do not restrict installed ducting or install air boosters, as this can cause improper furnace operation and erratic sail switch operation.
Water Submersion: If any part of the appliance has been submerged in water, immediately call a qualified service technician to inspect and replace affected control system and gas control parts.
Unauthorized Parts: Only factory-authorized parts are to be used on the furnace.
Operating in Motion: Do not operate the furnace while the vehicle is in motion or being towed.

Warranty Information

The Suburban RV furnace comes with a two-year limited warranty on material and workmanship from the date of purchase. Suburban will replace defective parts and pay a warranty service allowance to authorized service centers. Proof of purchase date (e.g., Bill of Sale) is required. There is also a three-year limited warranty on the heat exchanger, covering defects in material and workmanship during the third through fifth year after original purchase. A replacement heat exchanger will be provided under the same conditions as the two-year warranty, but without labor reimbursement.

The warranty specifically excludes:

Normal maintenance (e.g., cleaning orifices and burners).
Initial checkouts or diagnosis without repair.
Damage from faulty or incorrect installation/application.
Failure due to loose wires, dirt in controls, fuel line issues, restricted airflow, or low voltage.
Routine adjustments to the thermostat, electrode, or burner.
Costs incurred in gaining access to the furnace.
Parts not supplied by Suburban.
Freight charges for parts replacements.
Damage from misapplication, abuse, unreasonable use, unauthorized alteration, improper service, or failure to provide reasonable maintenance.
Products with altered, defaced, or removed serial numbers.
Products installed or warranty claims originating outside the Continental U.S.A., Alaska, Hawaii, and Canada.
Damage from floods, winds, lightning, accidents, corrosive atmosphere, or other conditions beyond Suburban's control.
Any special, indirect, or consequential property, economic, or commercial damage.

The manual advises owners to contact the nearest authorized Suburban Service Center for warranty service, providing model and serial numbers. If an authorized service center cannot be located, Suburban's Service Department should be contacted for authorization.