Heil Furnace SP80 Manuals

The Heil Furnace SP80 is a high-efficiency gas furnace designed for residential heating applications, featuring advanced combustion technology, variable-speed blower motor, durable heat exchanger construction, electronic ignition system, multiple-speed airflow settings, integrated diagnostic controls, safety shutoff features, and energy-efficient operation. Rated for natural gas or propane conversion with AFUE ratings up to 80%. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation Requirements 3. First-Time Setup 4. Technical Specifications 5. Controls and Settings 6. Gas and Electrical Connections 7. Operation Procedures 8. Maintenance Schedule 9. Safety Features 10. Regulatory Information 11. Troubleshooting Guide

Features at a Glance

Key components: Durable steel heat exchanger, variable-speed ECM blower motor, hot surface igniter, multi-speed inducer motor, integrated control board, flame sensor, pressure switches, gas valve assembly.

Feature	Description
Heat Exchanger	Durable steel construction for long service life
Blower Motor	Variable-speed ECM for quiet, efficient operation
Ignition System	Hot surface igniter for reliable lighting
Inducer Motor	Multi-speed for proper combustion airflow
Control Board	Integrated diagnostics and safety controls
Gas Valve	Precise gas flow regulation
Flame Sensor	Safety feature to detect burner operation
Pressure Switches	Verify proper venting conditions
Filter System	Standard 1-inch or 4-inch media filter compatible
Thermostat Connections	Standard 24V connections for heating control

Installation Requirements

Proper installation is critical for safe and efficient operation. Follow all local codes and manufacturer guidelines.

Location: Install in clean, dry area with adequate combustion air and service clearance.
Venting: Use approved Category I venting materials; maintain proper slope and clearances.
Gas Connection: Use black iron pipe with proper sizing; pressure test all connections.
Electrical: 120V AC power supply with proper grounding; follow NEC requirements.
Ductwork: Size properly for airflow requirements; seal all connections.

WARNING! Installation must be performed by qualified HVAC technician. Improper installation can cause fire, explosion, or carbon monoxide poisoning.

First-Time Setup

Initial startup and configuration procedures for new installations.

Gas pressure adjustment: Verify manifold pressure per specifications (3.5" WC natural gas).
Blower speed settings: Set appropriate speeds for heating operation based on duct static pressure.
Thermostat configuration: Connect and program compatible thermostat for heating control.
Safety check: Verify all safety controls function properly before leaving installation.
Customer orientation: Explain basic operation and maintenance requirements to homeowner.

CAUTION! Never bypass safety controls. Always verify proper operation before leaving installation site.

Technical Specifications

Model Series: SP80 Various Sizes (40,000-120,000 BTU)
AFUE Rating: Up to 80% Annual Fuel Utilization Efficiency
Fuel Type: Natural Gas (convertible to LP with kit)
Electrical: 120V AC, 60Hz, 5-8 Amps depending on model
Blower Motor: Variable-speed ECM, multi-tap settings
Heat Exchanger: Clamshell design, aluminized steel
Venting: Category I, 4-5" diameter depending on model
Operating Temp Rise: 35-65°F (adjustable via blower speed)
Sound Rating: Quiet operation with sound-insulated cabinet

Controls and Settings

Integrated control board manages all furnace operations with diagnostic LED for troubleshooting.

Control Board Features: Ignition sequence control, blower operation timing, safety circuit monitoring, diagnostic code storage, blower speed selection, thermostat interface.

Blower Speed Settings: Adjust via motor taps or control board programming for proper airflow. Gas Pressure: Factory set but field verifiable with manometer. Limit Controls: Automatic high-temperature shutdown with manual reset. Pressure Switches: Verify inducer operation and venting integrity. Flame Sensor: Monitors burner operation for safety shutdown.

Gas and Electrical Connections

Proper connections are essential for safe and reliable operation.

Gas Line: Use approved black iron pipe with drip leg and sediment trap.
Gas Pressure: Verify inlet and manifold pressures per data plate specifications.
Electrical: Dedicated 15-amp circuit with proper grounding.
Thermostat: Standard 24V connections (R, W, G, C terminals).
Safety: Install carbon monoxide detectors in living spaces as required by code.

Tip: Always use leak detection solution to check all gas connections after installation.

Operation Procedures

Normal heating cycle operation and seasonal startup procedures.

Thermostat call: Set thermostat above room temperature to initiate heating cycle.
Inducer operation: Inducer motor starts first to establish draft.
Pressure switch: Verifies proper draft before ignition sequence.
Ignition: Hot surface igniter glows, then gas valve opens for burner ignition.
Flame sensing: Flame sensor confirms burner operation.
Blower operation: Blower starts after heat exchanger warm-up delay.
Cycle completion: System shuts down when thermostat satisfied.

WARNING! If furnace fails to start or locks out repeatedly, contact qualified service technician.

Maintenance Schedule

Regular maintenance ensures efficient operation and extends equipment life.

Frequency	Maintenance Task
Monthly	Check and replace air filter if dirty
Annually	Professional inspection and cleaning
Annually	Check heat exchanger for cracks or damage
Annually	Clean burners and inspect flame pattern
Annually	Verify gas pressure and combustion analysis
Annually	Check vent system for obstructions
Annually	Lubricate inducer motor if required
Annually	Check safety controls and operation

Safety Features

Multiple safety systems protect against hazardous conditions.

Flame Rollout Switches: Detect improper burner combustion. High Limit Switches: Prevent overheating of heat exchanger. Pressure Switches: Ensure proper venting operation. Flame Sensor: Shuts off gas if flame not detected. Ignition Control: Limited trial-for-ignition attempts. Gas Valve: Automatic shutoff during power interruption.

Regulatory Information

ANSI Z21.47: Certified for natural gas and propane operation. UL 795: Commercial-Industrial Gas Equipment standard compliance. CSA International: Certified for US and Canadian markets. All installations must comply with National Fuel Gas Code (NFPA 54), National Electrical Code (NFPA 70), and local building codes. For technical support, contact Heil HVAC support at 1-800-HEIL-USA or visit www.hell.com.

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, safety lockout	Check power supply; verify thermostat setting; reset disconnect switch.
No heat	Gas supply, ignition failure	Verify gas valve on; check for ignition attempts; inspect flame sensor.
Short cycling	Dirty filter, high limit	Replace air filter; check for restricted airflow; verify proper temperature rise.
Blower not running	Motor, capacitor, control board	Check for power to blower; inspect capacitor; verify control board signals.
Lockout condition	Safety device tripped	Reset power; check diagnostic LED; identify tripped safety control.
Unusual noises	Motor, inducer, ductwork	Inspect blower wheel; check inducer assembly; examine duct connections.

Diagnostic Codes: Refer to control board LED flash patterns for specific error codes.

Service: 1-800-HEIL-USA; www.hell.com