American Standard HVAC ALLEGIANCE 10 Manual

The American Standard Allegiance 10 is a high-efficiency residential gas furnace designed for reliable home heating. It features a durable aluminized steel heat exchanger, electronic ignition, variable-speed blower motor, and compatibility with various thermostat systems. Below are key sections covering safety, features, installation, operation, maintenance, and troubleshooting for optimal performance and longevity.

1. Features at a Glance 2. Installation Guidelines 3. First-Time Startup 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: Aluminized steel primary heat exchanger, Hot surface ignition system, Variable-speed ECM blower motor, Multi-speed inducer motor, Integrated control board, Flame sensor, Pressure switches, Filter rack.

Feature	Description
Heat Exchanger	Durable aluminized steel construction for efficient heat transfer
Ignition System	Hot surface electronic ignition (no standing pilot)
Blower Motor	Variable-speed ECM for quiet operation and improved efficiency
Inducer Motor	Multi-speed for proper venting and combustion
Control Board	Integrated microprocessor for system monitoring and control
Filter System	Standard 1" filter rack for easy maintenance
Venting	Category I venting (natural draft) compatible
Gas Valve	Multi-port gas valve with pressure regulation
Safety Controls	Flame rollout switch, limit switches, pressure switches
Wiring	Standard 24V control system with terminal strip

Installation Guidelines

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

Position furnace: Place on level surface in approved location with proper clearances (typically 1" sides, 6" front, 24" top).
Connect gas supply: Use black iron pipe with proper thread sealant. Pressure test for leaks.
Connect electrical: 120V AC power supply with dedicated circuit. Connect 24V thermostat wiring.
Connect venting: Install proper Category I vent pipe (type B) with correct slope and termination.
Connect ductwork: Attach supply and return ducts securely with proper sealing.

WARNING! Installation must comply with all local codes. Gas connections must be leak-tested. Only qualified HVAC technicians should install this equipment.

First-Time Startup

Complete installation checks before initial startup.

Verify all connections: Gas, electrical, venting, and ductwork properly installed.
Install air filter: Insert clean 1" filter in filter rack.
Set thermostat: Place in OFF position, then set to HEAT mode with temperature above room temp.
Power on: Turn on electrical power at disconnect switch.
Gas valve: Turn gas supply valve to ON position.
Start sequence: Thermostat will initiate heating cycle; observe proper ignition and operation.

CAUTION! Check for gas odors before and after startup. If gas smell is detected, shut off immediately and contact professional.

Technical Specifications

Model Series: Allegiance 10 Gas Furnace
Input BTU/H: 40,000 to 120,000 (varies by model)
Efficiency: 80% AFUE (Annual Fuel Utilization Efficiency)
Gas Type: Natural Gas (LP conversion kit available)
Electrical: 120V AC, 60Hz, 15 Amp circuit
Blower Motor: Variable-speed ECM, 3/4 to 1 HP
Airflow: 600 to 2000 CFM (depending on model and duct static)
Dimensions: Varies by model (typical: 21"W x 26"D x 48"H)
Venting: Category I, 3" to 8" diameter
Warranty: 20-year limited heat exchanger, 5-year parts

Controls and Operation

Integrated control board manages all furnace functions with LED status indicator.

Control Board LED Codes: Steady green = normal operation. Flashing codes indicate specific conditions (see troubleshooting section).

Thermostat Operation: Compatible with most 24V thermostats. For optimal efficiency, use programmable thermostat. Heating Cycle: 1. Thermostat calls for heat. 2. Inducer motor starts. 3. Pressure switch proves draft. 4. Hot surface igniter heats. 5. Gas valve opens. 6. Flame sensor confirms ignition. 7. Blower starts after heat exchanger warm-up.

Thermostat Connection

Standard 24V thermostat connections at control board terminal strip.

Turn off power at disconnect switch before wiring.
Connect thermostat wires: R (24V hot), W (heat), G (fan), C (common), Y (cool - if AC connected).
Secure connections: Ensure wires are tight and not touching other terminals.
Restore power and test operation.

Tip: Use 18-gauge thermostat wire for runs under 100 feet. For longer runs, use heavier gauge wire.

Maintenance Procedures

Regular maintenance ensures efficiency and longevity.

Monthly: Check and replace air filter if dirty.
Annual (by professional): Inspect heat exchanger for cracks or corrosion.
Annual: Clean burners and check flame pattern.
Annual: Check gas pressure and adjust if necessary.
Annual: Clean blower wheel and housing.
Annual: Check inducer motor and venting system.
Annual: Test safety controls and ignition system.
Annual: Check electrical connections for tightness.

WARNING! Only qualified technicians should perform internal maintenance. Disconnect power and gas before servicing.

Safety Features

Multiple safety systems protect against hazardous conditions: Flame rollout switch (opens if flame escapes burners), High limit switch (opens if temperature exceeds safe level), Pressure switches (prove proper venting before ignition), Flame sensor (confirms burner ignition), Gas valve (shuts off if no ignition detected).

Care & Cleaning

Keep furnace area clean and unobstructed. Use vacuum with soft brush attachment for external cleaning.

CAUTION! Never use water or liquid cleaners on furnace. Keep flammable materials away from unit. Maintain proper clearance around furnace.

Regulatory Information

UL listed and ANSI certified for safety. Complies with U.S. Department of Energy efficiency standards. Manufactured to meet or exceed industry standards for residential gas furnaces. For technical support, contact American Standard at 1-800-926-4662 or visit www.americanstandardair.com. Copyright © American Standard Heating & Air Conditioning.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, switch	Check circuit breaker, thermostat setting, door switch, gas valve position.
Blower runs but no heat	Ignition, gas supply	Check for ignition attempt, gas valve on, gas supply available.
Short cycling	Filter, limit switch	Replace dirty filter, check for blocked vents/registers, verify limit switch operation.
Unusual noises	Components, ductwork	Check for loose panels, inducer/blower wheel obstruction, duct vibration.
LED error code flashing	System fault	Count flashes and refer to code chart in installation manual.
Gas odor	Leak, incomplete combustion	Immediately shut off gas and power. Evacuate area and call gas company.

Reset Procedure: Turn thermostat to OFF. Turn off power at disconnect for 30 seconds. Restore power. Set thermostat to HEAT.

Service: For professional service, contact authorized American Standard dealer. 1-800-926-4662; www.americanstandardair.com