Armstrong Air Furnace Manual Model G6A100D-14

The Armstrong Air Furnace Model G6A100D-14 is a high-efficiency gas furnace with 100,000 BTU input capacity, 14 SEER rating, single-stage operation, electronic ignition, multi-speed blower motor, durable heat exchanger, built-in diagnostic system, safety controls, and compatibility with standard thermostat systems. Designed for residential heating applications with natural gas or propane capability. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation Requirements 3. First-Time Setup 4. Technical Specifications 5. Controls and Operation 6. Thermostat Connection 7. Maintenance Procedures 8. Safety Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Heat exchanger, blower assembly, gas valve, ignition system, control board, filter rack, venting system, drain connections.

Feature	Description
Heat Exchanger	Stainless steel construction for durability and efficiency
Blower Motor	Multi-speed ECM motor for variable airflow
Gas Valve	Single-stage operation with safety shutoff
Ignition System	Hot surface ignition for reliable startup
Control Board	Integrated diagnostics with LED status lights
Filter Rack	Standard 1-inch filter size with slide-out access
Venting	PVC pipe compatible for sidewall or roof venting
Drain Connections	3/4-inch PVC for condensate removal
Electrical	115V AC, 60Hz standard household power
Thermostat Connection	Standard 5-wire terminal block

Installation Requirements

Professional installation recommended. Ensure proper clearances and venting.

Location: Install in dry, level area with minimum clearances as specified.
Venting: Use approved PVC pipe; maintain proper slope for condensate drainage.
Gas Connection: Use approved gas pipe and fittings; pressure test for leaks.
Electrical: Connect to dedicated 115V circuit with proper grounding.
Drain Line: Install condensate drain with trap and proper routing.

WARNING! Gas appliances require professional installation. Improper installation can cause fire, explosion, or carbon monoxide poisoning.

First-Time Setup

After installation, perform initial startup and system check.

Gas pressure adjustment: Verify and adjust manifold pressure per specifications.
Blower speed setting: Set appropriate speed for heating application.
Thermostat configuration: Program for single-stage heating operation.
System test: Run complete heating cycle to verify proper operation.
Safety check: Verify all safety controls are functioning correctly.

CAUTION! Only qualified technicians should perform initial setup and gas pressure adjustments.

Technical Specifications

Model: G6A100D-14
Input Capacity: 100,000 BTU/H
Efficiency Rating: 14 SEER
Gas Type: Natural Gas or Propane (with conversion kit)
Electrical: 115V AC, 60Hz, 5.2 Amps
Airflow: 800-1600 CFM variable
Static Pressure: 0.1-0.5 inches WC
Venting: 2-inch PVC recommended
Dimensions: 21" W x 21" D x 45" H
Weight: 98 lbs

Controls and Operation

Integrated control board with diagnostic LED. Front access panel contains power switch and service ports.

Control Board: LED status lights indicate system operation and fault codes. Power switch for service disconnect. Gas valve with manual shutoff.

Operation: Single-stage heating with variable blower speed. Automatic ignition sequence. Built-in timers for blower operation. Diagnostic codes for troubleshooting.

Thermostat Connection

Standard 5-wire terminal block: R (24V power), W (heat), G (fan), C (common), Y (cool - not used).

Turn off power to furnace before connecting thermostat wires.
Match thermostat wires to terminal block designations.
Use proper wire nuts or terminal screws for secure connections.
Program thermostat for single-stage heating operation.

Tip: Use 18-gauge thermostat wire for runs up to 50 feet.

Maintenance Procedures

Regular maintenance ensures optimal performance and longevity.

Filter replacement: Change 1-inch filter monthly during heating season.
Blower cleaning: Vacuum blower assembly and motor annually.
Heat exchanger inspection: Professional visual inspection recommended yearly.
Vent system: Check for obstructions and proper drainage.
Burner cleaning: Clean burners and inspect flame pattern annually.
Drain system: Flush condensate drain with clean water quarterly.

WARNING! Disconnect power before performing any maintenance. Gas components should only be serviced by qualified technicians.

Safety Features

Multiple safety systems protect against hazardous conditions.

Safety Feature	Function
Flame Rollout Switch	Shuts off gas if flame extends outside burner area
High Limit Switch	Prevents overheating by shutting off burners
Pressure Switch	Ensures proper venting before ignition
Ignition Control	Monitors flame and shuts off gas if not detected
Gas Valve	Automatic shutoff in case of system failure

Care & Cleaning

Regular cleaning maintains efficiency and prevents issues.

Exterior: Wipe with damp cloth only. Interior: Vacuum dust and debris annually. Filter: Replace regularly. Drain system: Flush with clean water. Burners: Clean with soft brush if accessible.

CAUTION! Never use water or cleaning solutions on electrical components. Always disconnect power before cleaning.

Regulatory Information

UL listed and ANSI certified. Complies with ASHRAE 90.1 standards. Natural gas models certified for use in United States and Canada. Propane conversion requires approved kit and professional installation. Manufactured to meet DOE efficiency standards. For technical support, contact Armstrong Air at 1-800-448-5872 or visit www.armstrongair.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, safety switch	Check power switch; verify thermostat setting; reset rollout switch.
No heat	Gas supply, ignition, filter	Verify gas valve on; check for ignition attempts; replace dirty filter.
Short cycling	Filter, limit switch, airflow	Clean/replace filter; check limit switch; verify proper airflow.
Blower won't stop	Thermostat, control board	Check thermostat fan setting; inspect control board relay.
Unusual noises	Blower, motor, ductwork	Inspect blower wheel; check motor bearings; examine duct connections.

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

Service: 1-800-448-5872; www.armstrongair.com