The Armstrong Furnace is a high-efficiency heating system designed for residential and light commercial use, featuring advanced combustion technology, multiple heat exchanger stages, variable-speed blower motors, electronic ignition systems, and integrated safety controls. Below are key sections for safety procedures, technical specifications, troubleshooting, maintenance, and repair instructions.
Critical safety measures for furnace operation and repair.
| Safety Item | Procedure |
|---|---|
| Gas Valve Shutoff | Always turn off gas supply before servicing |
| Electrical Disconnect | Switch off power at service panel |
| Carbon Monoxide Detection | Install CO detectors near furnace area |
| Venting Inspection | Check for blockages before operation |
| Combustion Air | Ensure adequate fresh air supply |
| Heat Exchanger Inspection | Check for cracks annually |
| Flame Observation | Verify proper burner operation |
| Pressure Testing | Test gas lines for leaks |
| Clearance Requirements | Maintain proper spacing from combustibles |
| Personal Protective Equipment | Wear safety glasses and gloves |
Major components: Heat exchanger, burners, blower assembly, gas valve, ignition system, control board, limit switches, pressure switches.
WARNING! Furnace contains high voltage and combustible gas. Only qualified technicians should perform repairs.
Proper furnace installation ensures safe and efficient operation.
CAUTION! Installation must comply with all local building codes and manufacturer specifications.
Integrated furnace controller with diagnostic capabilities.
Control Board: Monitors safety devices, controls ignition sequence, manages blower operation, provides error codes via LED flash patterns.
Operation Sequence: Call for heat → Pressure switch check → Inducer motor start → Hot surface ignition → Gas valve opening → Flame verification → Blower activation → Normal operation → Satisfied call → Post-purge cycle.
Diagnostic Codes: LED flash patterns indicate specific fault conditions (1 flash = pressure switch, 2 flashes = ignition failure, etc.)
Proper wiring ensures safe and reliable furnace operation.
Tip: Use voltage tester to confirm power is off before beginning electrical work.
Gas train components and their functions.
WARNING! Always use leak detection solution to check for gas leaks after any gas system work.
Proper venting is critical for safe furnace operation.
Direct Vent Systems: Use approved PVC pipe materials, maintain proper slope for condensation drainage, follow manufacturer specifications for maximum vent length and number of elbows.
Conventional Venting: Ensure proper chimney condition, install draft hood correctly, verify adequate draft.
Regular maintenance ensures optimal furnace performance and longevity.
CAUTION! Only qualified personnel should perform furnace maintenance.
ANSI Z21.47: Certified for gas-fired central furnaces. UL 795: Commercial-industrial gas heating equipment. All installations must comply with National Fuel Gas Code (NFPA 54) and local building codes. For technical support, contact Armstrong Air Technical Services at 1-800-448-5872 or visit www.armstrongair.com.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Furnace won't start | Power supply, thermostat, door switch | Check circuit breaker, verify thermostat setting, ensure door closed properly |
| No heat | Gas supply, ignition, limit switch | Verify gas valve open, check for spark/flame, reset limit switch |
| Short cycling | Dirty filter, blocked vent, overheating | Replace filter, clear vent obstructions, check airflow |
| Blower won't stop | Thermostat fan setting, control board | Check thermostat fan setting, inspect control board relay |
| Unusual noises | Loose components, motor bearings | Tighten all fasteners, lubricate or replace motor |
| Pilot outage | Draft, thermocouple, gas pressure | Check venting, replace thermocouple, verify gas pressure |
| Error codes flashing | Various system faults | Refer to diagnostic chart in control section |
Reset Procedure: Turn power off for 30 seconds, then restore power.
Service Contact: 1-800-448-5872; www.armstrongair.com