American Standard Freedom 80 Oil Furnace Service Manual

The American Standard Freedom 80 is a high-efficiency oil furnace designed for residential heating applications. This mid-efficiency furnace features AFUE ratings up to 86%, Beckett oil burner system, cast iron heat exchanger, direct drive blower motor, and advanced safety controls. Below are key sections for safety procedures, technical specifications, installation guidelines, maintenance procedures, troubleshooting, and service protocols.

1. Features and Specifications 2. Safety Precautions 3. Installation Requirements 4. Technical Specifications 5. Control System Overview 6. Venting and Combustion Air 7. Startup and Commissioning 9. Maintenance Procedures 10. Regulatory Compliance 11. Troubleshooting Guide

Features and Specifications

Key components: Beckett AFG oil burner, cast iron heat exchanger, direct drive blower, primary control, cad cell flame detector, and limit controls.

FeatureDescription
Burner SystemBeckett AFG oil burner with nozzle and electrode assembly
Heat ExchangerCast iron construction for durability and heat transfer
Blower SystemDirect drive blower with multi-speed motor
Efficiency RatingUp to 86% AFUE (Annual Fuel Utilization Efficiency)
Fuel TypeNo. 2 heating oil
Control SystemPrimary control with safety lockout
Flame DetectionCad cell eye for reliable flame sensing
Safety ControlsHigh limit control, rollout protection
VentingCategory I venting with approved chimney or vent pipe
Electrical120V AC, 60Hz operation

Safety Precautions

Always follow proper safety procedures when servicing oil furnace equipment.

  1. Disconnect electrical power before servicing: Turn off main power switch and verify with voltage tester.
  2. Fuel oil precautions: Shut off oil supply valve; contain spills immediately.
  3. Combustion safety: Ensure proper ventilation during testing; use CO detector.
  4. Personal protective equipment: Wear safety glasses, gloves, and appropriate clothing.

WARNING! Oil furnaces operate at high temperatures and use combustible fuel. Always follow manufacturer safety guidelines and local codes.

Installation Requirements

Proper installation ensures safe and efficient operation.

  1. Location requirements: Install in approved locations with proper clearances to combustibles.
  2. Venting: Use approved vent materials with proper slope and termination.
  3. Combustion air: Provide adequate combustion and ventilation air per code requirements.
  4. Oil supply: Install proper oil line with filter and shutoff valve.
  5. Electrical: Connect to dedicated circuit with proper grounding.

CAUTION! Installation must comply with NFPA 31, local building codes, and manufacturer specifications.

Technical Specifications

Control System Overview

Primary control manages burner operation and safety functions.

Primary Control: Manages burner sequence, includes safety lockout, cad cell flame detection, and timing functions.

Limit Controls: High limit control prevents overheating, fan control regulates blower operation. Safety Devices: Rollout switch protects against flame rollout, pressure switch verifies draft, cad cell confirms flame presence. Wiring: Follow wiring diagram exactly; verify all connections are secure and properly terminated.

Venting and Combustion Air

Proper venting is critical for safe operation and efficiency.

  1. Vent sizing: Use manufacturer-specified vent pipe diameter.
  2. Vent material: Approved chimney liner or Type B vent pipe.
  3. Combustion air: Provide adequate air supply per local codes.
  4. Draft measurement: Verify draft between 0.02 - 0.06 in. w.c.

Tip: Always perform combustion analysis and draft test after installation or service.

Startup and Commissioning

Proper startup procedure ensures optimal performance and safety.

  1. Pre-startup inspection: Verify all connections, clearances, and components.
  2. Oil system purge: Bleed oil line to remove air from system.
  3. Combustion test: Measure CO2, smoke spot, stack temperature, and draft.
  4. Blower adjustment: Set proper airflow for heating application.
  5. Safety verification: Test all safety controls and limit switches.
  6. Customer instruction: Explain operation and maintenance requirements.

WARNING! Never bypass safety controls during startup. Always verify proper operation of all safety devices.

Maintenance Procedures

Regular maintenance ensures efficiency, reliability, and safety.

  1. Annual cleaning: Clean heat exchanger, combustion chamber, and flue passages.
  2. Burner maintenance: Replace nozzle, clean strainer, check electrodes.
  3. Filter replacement: Replace air filter regularly (typically 1-3 months).
  4. Blower maintenance: Clean blower wheel and housing, lubricate motor if required.
  5. Control check: Test safety controls and limit switches.
  6. Combustion analysis: Perform annual combustion efficiency test.

CAUTION! Always disconnect power and fuel supply before performing maintenance.

Regulatory Compliance

UL certified for safety and performance. Complies with ANSI Z21.47/CSA 2.3 standards. Installation must meet NFPA 31, local mechanical codes, and building regulations. For technical support, contact American Standard at 1-800-4-AMERICAN or visit www.americanstandardair.com.

Troubleshooting Guide

SymptomPossible CauseCorrective Action
No ignitionNo fuel, ignition failureCheck oil supply, bleed line, verify ignition transformer, check electrodes
Short cyclingDirty filter, limit switchReplace filter, check airflow, verify limit control operation
Excessive smokePoor combustionClean combustion chamber, adjust air band, replace nozzle
Lockout conditionSafety control trippedReset primary control, identify cause (flame failure, rollout, etc.)
No heat outputBlower failureCheck motor, capacitor, fan control, wiring
Unusual noisesMechanical issuesInspect blower wheel, motor bearings, combustion air

Reset Procedure: Press reset button on primary control; if lockout persists, identify and correct underlying issue.

Technical Support: 1-800-4-AMERICAN; www.americanstandardair.com

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