Inter City Products Furnace Manual

The Inter City Products Furnace is a high-efficiency residential heating system designed for reliable performance and energy savings. This gas furnace features multiple heating stages, variable-speed blower motor, electronic ignition, built-in diagnostics, safety controls, and compatibility with standard thermostat systems. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation Requirements 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Thermostat 7. Operating Procedures 8. Maintenance Schedule 9. Safety Features 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Multi-speed blower assembly, heat exchanger, gas valve, electronic control board, pressure switches, flame sensor, and diagnostic LED.

Feature	Description
Multi-stage heating	Two-stage gas valve for efficient operation
Variable-speed blower	Adjustable airflow for comfort and efficiency
Electronic ignition	Hot surface igniter for reliable startup
Built-in diagnostics	LED status light for error codes
Safety controls	Pressure switches, flame rollout, limit switches
Filter monitoring	Reminder light for filter changes
Gas connection	1/2" NPT gas inlet
Electrical connection	120V AC, 60Hz power supply
Thermostat connection	Standard 24VAC terminals
Vent connections	PVC venting compatible

Installation Requirements

Professional installation recommended. Verify local codes and obtain permits.

Location: Install in dry, well-ventilated area with proper clearances.
Gas connection: Use approved gas pipe and fittings; pressure test required.
Electrical: Connect to dedicated 120V circuit with proper grounding.
Venting: Install PVC vent pipes according to manufacturer specifications.
Drain line: Connect condensate drain to proper disposal.

WARNING! Gas appliances can be dangerous if improperly installed. Use qualified HVAC technician.

First-Time Setup

After installation, perform initial startup procedure.

Verify all connections: Gas, electrical, venting, and drain.
Install air filter: Ensure proper size and orientation.
Power on: Turn on electrical power and gas supply.
Thermostat setup: Program desired temperature settings.
Test operation: Verify heating cycle and safety functions.

CAUTION! Never bypass safety controls. Test carbon monoxide detectors.

Specifications

Heating Capacity: 40,000-120,000 BTU/h (model dependent)
Efficiency: 80-96% AFUE (model dependent)
Stages: Single or two-stage operation
Blower Type: Variable-speed ECM motor
Gas Type: Natural gas or LP (conversion kit required)
Electrical: 120V AC, 60Hz, 15A circuit
Control Voltage: 24VAC from integrated transformer
Dimensions: Varies by model (check specific model data)
Warranty: Limited lifetime heat exchanger, 10 years parts

Controls and Settings

Access control board via front panel. Diagnostic LED indicates system status.

Control Board: LED status light, dip switches for configuration, test terminals.

Settings: Blower speed adjustments, heating stages, fan control, filter timer. Diagnostics: LED flash codes for troubleshooting (1 flash = normal, 2 flashes = pressure switch, etc.). Configuration: Dip switches for thermostat type, blower delays, staging parameters.

Connecting Thermostat

Compatible with most 24VAC thermostats. Professional installation recommended.

Turn off power to furnace at electrical disconnect.
Remove control board cover to access thermostat terminals.
Connect wires: R (power), W (heat), G (fan), C (common), Y (cooling if applicable).
Secure connections and replace cover.
Restore power and test thermostat operation.

Tip: Use thermostat compatible with multi-stage systems for full functionality.

Operating Procedures

Normal operation controlled by thermostat. System includes automatic safety checks.

Call for heat: Thermostat signals furnace to begin heating cycle.
Pre-purge: Blower operates to clear combustion chamber.
Ignition: Hot surface igniter glows, gas valve opens.
Flame detection: Flame sensor confirms ignition.
Main heating: Burners operate at selected stage.
Post-purge: Blower continues after heating cycle to remove residual heat.

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

Maintenance Schedule

Regular maintenance ensures efficiency and safety. Professional service recommended annually.

Maintenance Task	Frequency
Replace air filter	Every 1-3 months
Clean flame sensor	Annually
Inspect heat exchanger	Annually
Check vent system	Annually
Lubricate blower (if required)	As needed
Test safety controls	Annually

Safety Features

Multiple safety systems protect against hazardous conditions.

Flame rollout switches: Shut off gas if flame escapes burner area
High limit switches: Prevent overheating
Pressure switches: Verify proper venting operation
Flame sensor: Confirms burner ignition
Gas valve: Automatic shutoff if ignition fails

CAUTION! Carbon monoxide hazard possible. Install CO detectors near sleeping areas.

Regulatory Information

UL listed and ANSI certified. Complies with applicable safety standards. Natural gas models certified for US and Canada. Installation must comply with National Fuel Gas Code NFPA 54/ANSI Z223.1 and local codes. For technical support, contact Inter City Products at 1-800-XXX-XXXX or visit www.intercityproducts.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, door switch	Check power supply; verify thermostat setting; ensure door closed properly.
No heat	Gas supply, ignition, filter	Verify gas valve on; check for ignition attempts; replace dirty filter.
Short cycling	Filter, limit switch, airflow	Replace filter; check for blocked vents; verify proper airflow.
Blower won't stop	Thermostat, control board	Check thermostat fan setting; inspect control board operation.
Error code flashing	Various system faults	Count LED flashes and refer to diagnostic chart in manual.

Reset: Turn power off for 30 seconds, then restore.

Service: 1-800-XXX-XXXX; www.intercityproducts.com