Bard Gas Furnace Manuals

The Bard gas furnace series represents high-efficiency heating solutions for residential and light commercial applications. These furnaces feature advanced combustion technology, variable-speed blowers, and energy-efficient operation with AFUE ratings up to 98%. Below are comprehensive sections covering installation, operation, maintenance, troubleshooting, and technical specifications for various Bard gas furnace models.

Features at a Glance

Key components: High-efficiency heat exchanger, variable-speed ECM blower motor, electronic ignition system, multi-speed inducer motor, integrated control board.

Installation Guidelines

Proper installation is critical for safe and efficient operation. Follow all local codes and manufacturer specifications.

1. Location selection: Choose well-ventilated area with adequate clearance for service access.
2. Gas line connection: Use black iron pipe with proper thread sealant; pressure test for leaks.
3. Electrical wiring: Connect to dedicated 120V circuit with proper grounding.
4. Venting system: Install according to manufacturer specifications for category.
5. Ductwork: Ensure proper sizing and sealing for optimal airflow.

WARNING! Installation must be performed by qualified HVAC technician. Improper installation can cause fire, explosion, or carbon monoxide poisoning.

First-Time Setup

Initial startup and configuration procedures for new installations.

1. Gas pressure adjustment: Set manifold pressure to specifications on rating plate.
2. Blower speed configuration: Adjust dip switches for proper CFM based on application.
3. Venting verification: Confirm proper draft and combustion air supply.
4. Safety check: Test all limit switches, pressure switches, and flame rollout devices.
5. Combustion analysis: Verify CO levels and efficiency readings.

CAUTION! Never bypass safety devices. Always verify proper operation before leaving installation.

Technical Specifications

• Input Capacity: 40,000 to 120,000 BTU/hr depending on model
• AFUE Rating: 80% to 98% efficiency
• Gas Type: Natural gas or LP (with conversion kit)
• Electrical: 120V, 60Hz, 1.5-5.0 amps
• Static Pressure: 0.1 to 0.8 inches WC maximum
• Temperature Rise: 35°F to 65°F operating range
• Venting: Category I or IV depending on model
• Dimensions: Varies by model (typically 21"W x 48"H x 26"D)
• Warranty: 20-year heat exchanger, 5-year parts

Controls and Settings

Integrated control board with LED status indicators and diagnostic capabilities.

Control Board: POWER ON/OFF, STATUS LED, DIP switches for configuration, diagnostic code display.

Operating Modes: HEAT, COOL, FAN ONLY, EMERGENCY HEAT. Blower Settings: Continuous fan, automatic operation, multi-speed configurations. Safety Features: Lockout after multiple ignition attempts, pressure switch monitoring, flame sensing, high-limit protection. Diagnostics: LED flash codes for troubleshooting, manual test modes.

Venting Requirements

Proper venting is essential for safe operation and efficiency.

1. Category I venting: Use B-vent or approved masonry chimney.
2. Category IV venting: Use PVC, CPVC, or ABS plastic piping.
3. Vent sizing: Follow manufacturer tables based on furnace input and vent length.
4. Combustion air: Provide adequate fresh air supply per local codes.
5. Termination: Maintain proper clearances from windows, doors, and air intakes.

Tip: Always perform combustion analysis after venting installation to verify proper operation.

Operation Procedures

Normal operating sequence and user controls.

1. Thermostat call: Set thermostat to desired temperature above room temp.
2. Inducer startup: Inducer motor begins 30-second prepurge cycle.
3. Ignition sequence: Hot surface igniter glows, gas valve opens.
4. Flame verification: Flame sensor confirms ignition within trial period.
5. Blower activation: Blower starts after heat exchanger warm-up delay.
6. Normal operation: Furnace runs until thermostat satisfied.
7. Shutdown sequence: Gas valve closes, inducer continues for post-purge.
8. Blower cool-down: Blower runs for preset time to dissipate residual heat.

WARNING! Never operate furnace with access panels removed. Keep combustible materials away from furnace.

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

Care & Cleaning

Turn off power and gas supply before performing any maintenance.

1. Air filter: Replace disposable filters monthly during heating season.
2. Burners: Clean with soft brush and vacuum annually.
3. Blower wheel: Clean annually with compressed air or soft brush.
4. Heat exchanger: Professional inspection and cleaning recommended.
5. Drain system: Clear condensate drain lines on high-efficiency models.

CAUTION! Always disconnect power before servicing. Use only approved cleaning methods.

Regulatory Information

ANSI Z21.47: Certified for gas-fired central furnaces. UL 1995: Standard for heating and cooling equipment. All Bard furnaces comply with U.S. Department of Energy efficiency standards. Installation must meet National Fuel Gas Code (NFPA 54) and local building codes. For technical support, contact Bard Manufacturing at 1-800-356-1881 or visit www.bardhvac.com.

Troubleshooting

Reset Procedure: Turn thermostat off, turn furnace power off for 30 seconds, restore power, turn thermostat on.

Service: 1-800-356-1881; www.bardhvac.com