Fraser Johnston Furnace Manual

The Fraser Johnston furnace is a high-efficiency residential heating system designed for reliable performance and energy savings. This manual covers installation, operation, maintenance, and troubleshooting for various Fraser Johnston furnace models. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: High-efficiency heat exchanger, electronic ignition system, variable-speed blower motor, digital thermostat interface, safety shutoff switches, and diagnostic LED indicators.

Installation

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

1. Location selection: Choose well-ventilated area with proper clearances (minimum 1 inch from combustible materials).
2. Gas connection: Use approved gas piping; pressure test for leaks before operation.
3. Electrical connection: Connect to dedicated 120V AC circuit with proper grounding.
4. Vent system: Install PVC vent pipes according to local codes and manufacturer specifications.
5. Drain system: Route condensate drain to proper disposal point.
6. Air filter: Install appropriate filter size for your model.

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

First-Time Setup

After installation, perform initial startup and system check.

1. Power on furnace: Switch power on at unit and circuit breaker.
2. Thermostat setup: Program thermostat for desired temperature settings.
3. System check: Verify proper ignition, burner operation, and airflow.
4. Safety verification: Confirm all safety switches are functioning properly.
5. Performance test: Run through complete heating cycle to ensure proper operation.

CAUTION! Never bypass safety controls. Ensure proper ventilation during initial startup.

Specifications

• Heating Capacity: 40,000 - 120,000 BTU/hr (varies by model)
• Efficiency: 90%+ AFUE rating
• Fuel Type: Natural gas or propane
• Electrical: 120V AC, 60Hz, 15 amp circuit
• Blower Motor: Variable-speed ECM
• Vent Material: 2" or 3" PVC schedule 40
• Filter Size: 16x25x1 or 20x25x1 standard
• Dimensions: Varies by model (typically 21"W x 21"D x 40"H)
• Warranty: 20-year heat exchanger, 5-year parts

Controls and Settings

Access control board via front panel. Main controls: Power switch, gas valve, thermostat connections, diagnostic LED.

Thermostat Settings: HEAT/COOL/OFF selector, temperature setpoint, fan AUTO/ON control.

Operating Modes: Single-stage or two-stage heating (depending on model), continuous fan operation, vacation mode. Safety Controls: Limit switches, pressure switches, flame sensor, rollout switches. Diagnostic Codes: LED flash patterns indicate specific error conditions for troubleshooting.

Connecting Components

Gas supply: Black iron pipe with sediment trap. Electrical: 120V dedicated circuit. Thermostat: 2-5 wire connection. Vent: PVC pipe system. Drain: 3/4" PVC condensate line.

1. Turn off gas and electrical power before making connections.
2. Use pipe thread sealant approved for gas applications.
3. Follow local codes for all gas, electrical, and vent installations.
4. Test all connections for leaks before final operation.

Tip: Label all wires during installation for easy identification during service.

Operating Procedures

Normal heating operation with thermostat control.

1. Set thermostat to HEAT mode and desired temperature.
2. Furnace will initiate startup sequence: inducer motor, pressure switch verification, ignition, main burner operation.
3. Blower motor will start after warm-up period to distribute heated air.
4. System will cycle on/off based on thermostat demand.
5. For shutdown: Set thermostat to OFF or lower temperature below room temperature.

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

Safety Features

Multiple safety systems: Flame rollout switches, high limit switches, pressure switches, flame sensor, carbon monoxide detection (some models). Emergency shutoff: Red power switch on unit or at electrical panel.

Maintenance & Cleaning

Regular maintenance ensures optimal performance and safety.

1. Monthly: Check and replace air filter as needed.
2. Annual: Professional inspection and cleaning recommended.
3. Seasonal: Inspect vent system for obstructions.
4. As needed: Clean flame sensor and burners.

CAUTION! Always turn off gas and electrical power before performing any maintenance. Use only qualified service technicians for major repairs.

Regulatory Information

UL certified for safety standards. ANSI Z21.47 compliant for gas furnace performance. Meets DOE energy efficiency requirements. CSA certified for Canadian installations. For technical support, contact Fraser Johnston at 1-800-555-HEAT or visit www.fraserjohnston.com.

Troubleshooting

Reset: Turn power off for 30 seconds, then restore. Check diagnostic LED for error codes.

Service: 1-800-555-HEAT; www.fraserjohnston.com