Suburban Propane Furnace Manual

The Suburban Propane Furnace is a high-efficiency heating system designed for residential use, featuring advanced combustion technology, electronic ignition, variable-speed blower, safety shut-off valves, thermostat compatibility, and energy-saving modes. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Thermostat 7. Operating the Furnace 8. Maintenance Procedures 9. Safety Features 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Burner assembly, heat exchanger, blower motor, electronic control board, gas valve, pressure switch, flame sensor, venting system.

Feature	Description
Electronic Ignition	Energy-efficient spark ignition system
Variable-Speed Blower	Adjustable airflow for optimal comfort
Safety Shut-off Valves	Automatic gas shut-off in emergency
Thermostat Compatibility	Works with standard 24V thermostats
Pressure Switch	Ensures proper venting before ignition
Flame Sensor	Detects burner flame for safety
Heat Exchanger	Stainless steel for durability
Venting System	PVC or metal vent pipes
Filter Access	Easy-access filter compartment
LED Status Lights	Diagnostic indicators on control board

Installation

Unpack and inspect all components. Ensure proper location with adequate clearance.

Position furnace: Place on stable, level surface with proper clearances.
Connect gas line: Use approved gas piping; pressure test for leaks.
Install venting: Use proper vent materials per local codes.
Electrical connections: Connect to 120V power supply and thermostat.
Install air filters: Place clean filters in filter rack.

WARNING! Installation must be performed by qualified technician. Gas leaks can cause explosion. Follow all local codes.

First-Time Setup

Complete installation checks before initial startup.

Gas pressure check: Verify inlet and manifold pressures.
Vent system test: Ensure proper draft and no obstructions.
Electrical check: Verify proper voltage and grounding.
Thermostat setup: Program desired temperature settings.
Initial startup: Follow lighting instructions carefully.

CAUTION! Never bypass safety controls. Test carbon monoxide detectors.

Specifications

Fuel Type: Propane Gas
Input BTU: 40,000 - 120,000 BTU/hr (model dependent)
Efficiency: 80% - 96% AFUE
Electrical: 120V AC, 60Hz
Gas Pressure: 11" WC inlet, 10" WC manifold
Venting: Category I or IV (model dependent)
Blower Motor: ECM or PSC variable speed
Dimensions: Varies by model
Warranty: 20-year heat exchanger, 5-year parts

Controls and Settings

Access control board via front panel. Thermostat controls temperature settings.

Control Board: POWER switch, LED status lights, diagnostic codes, reset button.

Temperature Control: Set via thermostat (HEAT/COOL/AUTO/OFF). Fan Control: AUTO/ON settings. Advanced Settings: Blower delay, temperature differential, filter reminder. Diagnostic Codes: Flash patterns indicate specific issues.

Connecting Thermostat

Compatible with standard 24V thermostats. Follow wiring diagram.

Turn off power to furnace at main switch.
Remove thermostat cover and label existing wires.
Connect wires: R (power), W (heat), G (fan), C (common).
Mount thermostat and restore power.
Test operation by raising temperature setting.

Tip: Use thermostat with programmable settings for energy savings.

Operating the Furnace

Normal operation sequence: Thermostat call, inducer motor start, pressure switch close, igniter warm-up, gas valve open, burner ignition, blower start.

Set thermostat to desired temperature.
Furnace will automatically cycle on/off as needed.
Monitor for proper ignition and flame.
Listen for normal operating sounds.
Check airflow from registers.

WARNING! Never adjust gas pressure yourself. Contact qualified technician.

Maintenance Procedures

Regular maintenance ensures efficiency and safety.

Monthly: Check and replace air filters as needed.
Annual: Professional inspection and cleaning.
Seasonal: Check vent system for obstructions.
Bi-annual: Lubricate blower motor if required.
As needed: Clean flame sensor and burners.

CAUTION! Turn off gas and electricity before servicing.

Safety Features

Multiple safety systems protect against hazards: High limit switch, flame rollout switch, pressure switch, flame sensor, gas valve safety shut-off.

Regulatory Information

UL listed for safety. ANSI Z21.47 standards. CSA certified. Installation must comply with National Fuel Gas Code NFPA 54 and local codes. For support, contact Suburban Manufacturing at 1-800-782-8772 or visit www.suburbanmanufacturing.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power/thermostat	Check circuit breaker; verify thermostat setting; check door switch.
No heat	Gas supply/ignition	Verify gas valve on; check pilot/igniter; inspect flame sensor.
Short cycling	Filter/limit switch	Replace dirty filter; check high limit switch; verify airflow.
Blower not working	Motor/capacitor	Check blower motor; test capacitor; verify control board signal.
Unusual noises	Mechanical issues	Inspect blower wheel; check bearings; look for loose components.

Reset: Turn power off for 30 seconds then restore.

Service: 1-800-782-8772; www.suburbanmanufacturing.com