American Standard HVAC YCX036G1-H Manual

The American Standard YCX036G1-H is a high-efficiency residential gas furnace designed for reliable home heating. This model features variable-speed blower technology, a durable aluminized steel heat exchanger, electronic ignition, and compatibility with various thermostat systems. It operates on natural gas, is designed for quiet operation, and includes built-in diagnostic LEDs for simplified troubleshooting. Below are key sections covering safety, features, installation, operation, maintenance, and troubleshooting.

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: Variable-speed ECM blower motor, aluminized steel primary heat exchanger, stainless steel secondary heat exchanger, hot surface igniter, induced draft combustion system, integrated control board with diagnostic LEDs.

Feature	Description
Variable-Speed Blower	Provides consistent airflow, improved comfort, and energy efficiency
Aluminized Steel Heat Exchanger	Durable construction for long-term reliability
Electronic Ignition	Hot surface igniter for reliable, efficient startup
Induced Draft Combustion	Sealed combustion system for safety and efficiency
Diagnostic LED	Flashing light codes for easy troubleshooting
Multi-Speed Capability	Adjustable blower speeds for different heating/cooling needs
Side Venting Option	Flexible installation with side or top vent configurations
Quiet Operation	Insulated cabinet and variable-speed motor reduce noise
AFUE Rating	High Annual Fuel Utilization Efficiency
Compatible Thermostats	Works with standard and programmable thermostats

Installation Guidelines

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

Location Selection: Install in dry, level area with adequate service clearance (minimum 24 inches front access).
Venting System: Install approved PVC or metal vent pipes according to local codes and manufacturer specifications.
Gas Connection: Use black iron pipe; apply pipe compound resistant to LP gas. Test for leaks with soap solution.
Electrical Connection: Connect 120V AC power supply with proper grounding. Connect thermostat wires to control board.
Ductwork Connection: Secure supply and return ducts with proper sealing to prevent air leakage.

WARNING! Installation must be performed by qualified HVAC technician in accordance with all local codes. Gas furnaces can produce carbon monoxide—proper venting is critical.

First-Time Startup

After installation, perform initial startup sequence.

Verify all connections: Check gas, electrical, vent, and duct connections.
Set thermostat: Place thermostat in OFF position, then set to HEAT mode.
Power on: Turn on electrical power to furnace at disconnect switch.
Gas valve: Open main gas shutoff valve slowly.
Start sequence: Set thermostat above room temperature to initiate heating cycle.
Verify operation: Check for proper ignition, flame appearance, and airflow.
Measure temperature rise: Ensure temperature rise is within specified range on rating plate.

CAUTION! Never bypass safety controls. If furnace fails to start properly, shut off power and gas, then consult troubleshooting section.

Technical Specifications

Model: YCX036G1-H
Heating Capacity: 36,000 BTU/HR Input
AFUE Rating: Up to 96%
Gas Type: Natural Gas (convertible to LP with kit)
Gas Pressure: Natural Gas: 3.5" W.C.; LP Gas: 10" W.C.
Electrical: 115V/60Hz/1Ph, 5.0 Amps maximum
Motor Type: ECM Variable Speed
Venting: 2" PVC Schedule 40 (or approved equivalent)
Dimensions (HxWxD): 40" x 17.5" x 21"
Shipping Weight: 98 lbs
Sound Rating: As low as 65 dBA
Operating Temp Range: -30°F to 150°F ambient

Controls and Operation

Integrated control board manages all furnace operations with LED status indicators.

Control Board LEDs: Green (power), Red (error codes), Yellow (status).

Thermostat Connections: R (24V power), W (Heat), G (Fan), C (Common), Y (Cooling - if AC connected).

Operating Modes: HEAT - Normal heating operation; OFF - System disabled; FAN ON - Continuous fan operation.

Blower Speeds: Adjustable for heating and cooling modes via control board taps (consult wiring diagram).

Error Codes: Flashing patterns indicate specific issues (see troubleshooting section for code interpretation).

Thermostat Connection

Compatible with most 24V thermostats including programmable and smart models.

Turn off power to furnace at disconnect switch.
Remove control board access panel.
Connect thermostat wires to appropriate terminals (R, W, G, C, Y).
Secure connections and replace access panel.
Restore power and test thermostat operation.

Tip: Use 18-gauge thermostat wire for runs up to 100 feet. For longer runs, use 16-gauge wire.

Maintenance Procedures

Regular maintenance ensures optimal performance and longevity.

Monthly: Check and replace air filter (1" pleated or high-efficiency type recommended).
Annual (Before heating season): Professional inspection recommended.
Clean flame sensor: Remove, gently clean with fine sandpaper or steel wool.
Inspect heat exchanger: Check for cracks or corrosion (professional service recommended).
Clean blower assembly: Remove dust and debris from blower wheel and housing.
Check vent system: Ensure vent pipes are clear and properly sloped.
Test safety controls: Verify operation of limit switches and pressure switches.

WARNING! Always turn off electrical power and gas supply before performing any maintenance. Some procedures should only be performed by qualified technicians.

Safety Features

Multiple safety systems protect against hazardous conditions.

Flame Rollout Switches: Detect improper burner flames, shut off gas valve.
Limit Switches: Prevent overheating by monitoring heat exchanger temperature.
Pressure Switches: Verify proper venting before allowing ignition.
Ignition Control: Trial-for-ignition sequence with automatic shutoff if flame not detected.
Gas Valve: Dual automatic valves with manual shutoff.

Carbon Monoxide Warning: Install CO detectors near sleeping areas when using any fuel-burning appliance.

Care & Cleaning

Keep furnace area clean and unobstructed.

Exterior: Wipe with dry cloth only; no liquids or cleaning agents.
Air filter: Replace regularly (every 1-3 months depending on usage).
Vent terminals: Keep clear of snow, leaves, and debris.
Drain system: Clear condensate drain line annually (for high-efficiency models).

CAUTION! Never store flammable materials near furnace. Maintain minimum clearances specified in installation manual.

Regulatory Information

This furnace complies with ANSI Z21.47/CSA 2.3 standards for gas-fired central furnaces. Certified by CSA International. Installation must comply with National Fuel Gas Code (NFPA 54), National Electrical Code (NFPA 70), and all applicable local codes. For technical support, contact American Standard Heating & Air Conditioning at 1-800-428-4328 or visit www.americanstandardair.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power off, thermostat setting, gas valve	Check power switch, thermostat setting, gas valve position.
Blower runs but no heat	Ignition failure, gas supply	Check for error codes, verify gas supply, inspect igniter.
Short cycling	Dirty filter, blocked vent, limit switch	Replace filter, check vent system, verify limit switch operation.
Unusual noises	Loose components, airflow restriction	Tighten access panels, check for duct restrictions.
Error code flashing	System fault detected	Count flashes and refer to error code chart in service manual.
Pilot/igniter issues	Dirty sensor, faulty igniter	Clean flame sensor, test igniter for continuity.
Insufficient heat	Undersized unit, duct leaks, dirty filter	Verify unit sizing, seal duct leaks, replace filter.

Reset Procedure: Turn thermostat to OFF, turn off power at disconnect switch, wait 60 seconds, restore power, set thermostat to HEAT.

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