American Standard HVAC YCX036G3-L-M Manual

The American Standard YCX036G3-L-M is a high-efficiency residential gas furnace with variable-speed blower technology, designed for reliable heating performance. It features a durable aluminized steel heat exchanger, electronic ignition, multiple-speed blower motor, integrated diagnostic controls, and compatibility with various thermostat systems. Below are key sections covering safety, specifications, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Variable-speed ECM blower motor, aluminized steel primary heat exchanger, electronic hot surface ignition, integrated control board with diagnostic LED, multi-speed tap settings, and flue vent connection.

Installation Guidelines

Unpack and inspect all components. Ensure proper clearances and venting.

1. Location: Install in approved location (closet, attic, basement) with adequate combustion air and service clearance.
2. Venting: Use approved PVC pipe for intake and exhaust; maintain proper slope and termination clearances.
3. Gas Connection: Use black iron pipe with drip leg; pressure test for leaks before operation.
4. Electrical: Connect 120V AC power; ensure proper grounding and overcurrent protection.
5. Ductwork: Connect supply and return ducts; seal all joints to prevent air leakage.

WARNING! Installation must comply with local codes and be performed by qualified personnel. Gas furnaces produce carbon monoxide—ensure proper venting.

Initial Setup & Commissioning

After installation, complete startup procedure and verify operation.

1. Power on: Turn on electrical power and gas supply.
2. Thermostat setup: Set thermostat to HEAT mode and desired temperature.
3. Blower speed adjustment: Select appropriate cooling/heating speed taps based on static pressure.
4. Combustion check: Measure gas pressure and combustion analysis; adjust if necessary.
5. Test sequence: Verify ignition, flame sensing, blower operation, and safety controls.

CAUTION! Do not bypass safety devices. Verify all connections before energizing.

Technical Specifications

• Model: YCX036G3-L-M
• Heating Capacity: 36,000 BTU/hr input
• Efficiency: Up to 96% AFUE
• Gas Type: Natural gas (convertible to LP with kit)
• Electrical: 120V, 60Hz, 5.2 amps
• Blower Motor: Variable-speed ECM, 3/4 HP
• Airflow: 600-1200 CFM adjustable
• External Static Pressure: 0.2-0.8 in. w.c.
• Vent Size: 3-inch PVC
• Dimensions (HxWxD): 40" x 17.5" x 21"
• Weight: 98 lbs

Control Panel & Settings

Access control board behind front panel. LED indicator shows status codes.

Control Board: Integrated microprocessor with DIP switches for configuration.

DIP Switch Settings: Blower speed (COOL/HEAT), fan delay, thermostat type. LED Codes: Steady on = normal operation; flashing = fault code (refer to chart). Blower Speed Taps: Adjust heating/cooling speeds via wire terminals. Gas Valve Adjustment: Requires manometer; factory set for natural gas.

Wiring & Electrical Connections

Connect thermostat, power, and accessory wiring per diagram.

1. Disconnect power before servicing.
2. Thermostat connections: R (24V), W (heat), G (fan), C (common).
3. Accessory connections: Humidifier, electronic air cleaner terminals available.
4. Grounding: Ensure proper equipment grounding per NEC.

Tip: Use wire nuts and strain relief for all connections. Verify low-voltage polarity.

Operating Instructions

Operate via compatible thermostat.

1. Set thermostat to HEAT mode and desired temperature.
2. Furnace will initiate startup sequence: inducer motor, pressure switch check, ignition, flame verification.
3. Blower will start after heat exchanger warm-up delay.
4. At thermostat satisfaction, gas valve closes, blower runs post-purge cycle.
5. For continuous fan, set thermostat to FAN ON.

WARNING! Do not operate without filter. Strange odors may occur during first use—ventilate area.

Maintenance Procedures

Annual maintenance recommended by qualified technician.

1. Filter: Replace every 1-3 months; check monthly during peak seasons.
2. Heat exchanger: Inspect for cracks or corrosion annually.
3. Blower assembly: Clean wheel and motor; check bearings.
4. Vent system: Inspect for obstructions or deterioration.
5. Burners: Clean and verify flame pattern.
6. Safety controls: Test operation of limit switches and rollout switches.

CAUTION! Turn off gas and electrical power before servicing. Use only manufacturer-approved parts.

Regulatory & Compliance

UL listed; complies with ANSI Z21.47/CSA 2.3 standards. Meets U.S. Department of Energy efficiency requirements. Installation must comply with National Fuel Gas Code (NFPA 54), National Electrical Code (NFPA 70), and local regulations. For technical support, contact American Standard at 1-800-428-4328 or visit www.americanstandardair.com.

Troubleshooting Guide

Reset: Power cycle furnace to clear temporary faults.

Service: 1-800-428-4328; www.americanstandardair.com