2002 Keystone Sprinter 274RL Furnace Manual

The 2002 Keystone Sprinter 274RL furnace is a forced-air heating system designed for RV use, providing reliable warmth in cold weather conditions. This manual covers the Suburban NT-16SEQ furnace model, which features electronic ignition, multiple heat settings, safety shut-off systems, and compatibility with 12V DC power. Below are essential sections for safety, operation, maintenance, troubleshooting, and technical specifications.

1. Features at a Glance 2. Installation Guidelines 3. Operating Instructions 4. Technical Specifications 5. Controls and Settings 6. Maintenance Procedures 7. Safety Features 8. Winterization Tips 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: Electronic ignition system, thermostat control, blower fan, heat exchanger, safety shut-off valve, exterior vent, and 12V DC power connection.

Feature	Description
Electronic Ignition	Automatically ignites burner; no pilot light required
Thermostat Control	Adjustable temperature settings for comfort
Blower Fan	Distributes warm air throughout RV interior
Heat Exchanger	Transfers heat from burner to air stream
Safety Shut-off Valve	Cuts gas supply if flame is not detected
Exterior Vent	Allows exhaust gases to exit safely
12V DC Power	Operates on RV battery or converter power
Multiple Heat Settings	Low/Medium/High settings for efficiency
Air Intake	Brings in combustion air from outside
Gas Connection	Standard propane gas line fitting

Installation Guidelines

Professional installation recommended. Ensure proper ventilation and gas line connections.

Location: Install in well-ventilated area away from combustible materials.
Gas Connection: Use approved propane gas line with proper fittings.
Electrical: Connect to 12V DC power source with correct polarity.
Venting: Ensure exterior vent is clear of obstructions.
Testing: Check for gas leaks and proper operation before use.

WARNING! Gas appliances can be dangerous if improperly installed. Use qualified technician for installation.

Operating Instructions

Power on furnace using thermostat control.

Set thermostat to desired temperature above current room temperature.
Listen for ignition sequence: blower starts, then ignition click, then burner ignition.
Adjust heat settings using thermostat or fan control if available.
To turn off: Set thermostat below current room temperature or turn to OFF position.

CAUTION! Do not block air intake or exhaust vents. Ensure proper ventilation at all times.

Technical Specifications

Model: Suburban NT-16SEQ
BTU Output: 16,000 BTU/hour
Fuel Type: Propane/LP Gas
Power Requirements: 12V DC, 3.5 amps
Dimensions: 16.5" H x 9.5" W x 17" D
Airflow: 90 CFM maximum
Ignition: Electronic spark ignition
Safety Features: Overheat protection, flame failure detection
Venting: Direct vent system
Weight: 18 lbs

Controls and Settings

Primary control through RV thermostat. Furnace control board manages ignition sequence and safety functions.

Thermostat Settings: Temperature adjustment, Fan Auto/On settings, System On/Off.

Furnace Control Board: Monitors flame sensor, controls blower operation, manages ignition sequence, implements safety shut-offs. LED indicator lights show operational status (green = normal operation, red = fault condition).

Maintenance Procedures

Regular maintenance ensures optimal performance and safety.

Annual Inspection: Check burner assembly, heat exchanger, and venting system.
Cleaning: Remove dust and debris from air intake and exhaust vents.
Filter Replacement: Replace or clean air filter every 3 months or as needed.
Gas System: Check for leaks and ensure proper gas pressure.
Electrical: Verify proper 12V DC connection and voltage.

Tip: Schedule professional service annually before heating season.

Safety Features

Multiple safety systems protect against hazardous conditions.

Flame Failure Detection: Automatically shuts off gas if flame is not detected
Overheat Protection: Shuts down furnace if temperatures exceed safe limits
Vent Safety Switch: Prevents operation if vent is blocked
Low Voltage Protection: Prevents damage from insufficient power
Gas Pressure Regulation: Maintains consistent gas flow

WARNING! Never bypass safety devices. Immediate professional service required if safety systems activate.

Winterization Tips

Proper preparation for cold weather storage.

Clean furnace thoroughly before storage
Turn off gas supply at main valve
Disconnect 12V power source
Cover exterior vents to prevent debris entry
Store in dry location to prevent moisture damage

CAUTION! Always winterize furnace when RV will not be used for extended periods in cold weather.

Regulatory Information

ANSI Z21.44: Certified for RV use. CSA International: Complies with Canadian standards. EPA: Meets emission standards for mobile sources. For technical support, contact Suburban Manufacturing at 1-800-782-2201 or visit www.rvcomfort.com. Keystone RV Company: 1-866-425-4369.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power/thermostat issues	Check 12V power; verify thermostat setting; reset main power
Blower runs but no heat	Ignition/gas supply	Check propane supply; verify gas valve open; listen for ignition
Furnace cycles on/off frequently	Overheating/airflow	Check vents for blockage; clean air filter; verify proper ventilation
Unusual odors	Dust/burning debris	Clean furnace; allow to burn off accumulated dust; check for obstructions
Error code/flashing light	System fault	Consult fault code chart; reset power; contact service technician

Reset Procedure: Turn thermostat to OFF, wait 5 minutes, turn back to desired temperature.

Service: 1-800-782-2201; www.rvcomfort.com