Intercity Electric Furnace Manual

The Intercity Electric Furnace is a high-efficiency heating system designed for residential and commercial use, featuring advanced temperature control, multiple heating stages, energy-saving modes, digital thermostat interface, safety shut-off mechanisms, filter monitoring system, and compatibility with standard HVAC ductwork. Powered by 240V AC, 60Hz electrical supply. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

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

Features at a Glance

Key components: Heating elements, blower motor, control board, filter compartment, thermostat connection, safety switches, diagnostic LED indicators.

Feature	Description
Heating elements	Multiple staged heating coils for efficient operation
Blower motor	Variable speed for optimal air circulation
Control board	Microprocessor-controlled operation
Filter compartment	Easy-access filter replacement
Thermostat connection	Compatible with standard 24V thermostats
Safety switches	High-limit and roll-out protection
Diagnostic LEDs	Status and error code indicators
POWER	Main power switch and circuit breaker
RESET	System reset button
TEST	Self-test function

Installation

Unpack and inspect contents. Ensure proper location with adequate clearance.

Electrical connection: Hire licensed electrician for 240V wiring; connect to dedicated circuit.
Ductwork connection: Attach supply and return ducts securely with proper sealing.
Thermostat wiring: Connect 5-wire thermostat cable to control board terminals.
Gas line (if applicable): For dual-fuel models, connect gas line by licensed professional.
Ground connection: Ensure proper grounding according to local codes.

WARNING! Installation must be performed by qualified HVAC technician. Ensure proper ventilation and clearances.

First-Time Setup

Power on furnace; follow initial startup procedure.

System check: Press TEST button to run self-diagnostic.
Thermostat configuration: Set to HEAT mode, adjust temperature settings.
Blower speed: Adjust dip switches for proper airflow.
Heating stages: Configure staging based on heating requirements.
Filter installation: Insert new air filter with arrow pointing toward blower.

CAUTION! Do not operate without proper airflow. Ensure filter is installed correctly.

Specifications

Heating Capacity: 40,000-120,000 BTU/h (multiple models)
Voltage: 240V AC, 60Hz
Stages: 2-4 stage heating operation
Efficiency: Up to 98% AFUE rating
Blower Motor: ECM variable speed
Filter Size: Standard 16x25x1 inch or 20x25x1 inch
Sound Level: Less than 75 dB during operation
Operating Temp Range: -30°F to 120°F ambient
Warranty: 10 years on heat exchanger, 5 years parts

Controls and Settings

Access control board via front panel. Status LEDs indicate system operation.

Control Board: POWER indicator, HEAT LED, FAN LED, ERROR codes, dip switches for configuration.

Temperature Control: Setpoint adjustment, differential settings, cycle rate. Blower Control: On/Off delays, continuous fan option. Staging: Primary/secondary heat activation temperatures. Safety: High-limit settings, lockout timers, diagnostic modes.

Connecting Thermostat

Compatible with most 24V thermostats. Standard 5-wire connection (R, C, W, G, Y).

Turn off power at circuit breaker before wiring.
Match thermostat wires to control board terminals.
Secure connections with wire nuts or terminal screws.
Program thermostat for heating schedule and temperatures.
Test operation by raising thermostat setpoint.

Tip: Use programmable thermostat for maximum energy efficiency.

Operating Modes

Multiple operating modes for different heating requirements.

Normal Heating: Automatic staging based on temperature demand.
Continuous Fan: Circulates air without heating.
Emergency Heat: Bypasses staging for maximum heat output.
Vacation Mode: Maintains lower temperature setting.
Test Mode: Runs system through operational check.
Smart Recovery: Pre-heats to reach setpoint at scheduled time.
Filter Monitor: Tracks runtime and indicates when to change filter.
Diagnostic Mode: Displays error codes and system status.

WARNING! Do not override safety controls. Monitor system for unusual noises or odors.

Maintenance Features

Filter change indicator: LED flashes when filter needs replacement. Self-diagnostic: Error codes displayed via LED flashes. Service reminder: Annual maintenance alert.

Care & Cleaning

Turn off power before maintenance. Clean blower assembly annually. Replace filter every 1-3 months.

CAUTION! Do not use water or cleaning solvents on electrical components. Keep area around furnace clear of combustible materials.

Regulatory Information

UL Certified: Meets UL 1995 standards for heating equipment. Energy Star: Compliant with energy efficiency requirements. FCC Part 15: Class B digital device. Copyright © 2025 Intercity Heating Systems; all rights reserved. For technical support, visit www.intercityheating.com or contact 1-800-555-HEAT.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace not starting	Power/thermostat	Check circuit breaker; verify thermostat setting; ensure door closed properly.
No heat output	Elements/safety lockout	Check error codes; reset system; verify thermostat call for heat.
Blower not running	Motor/control board	Check blower door switch; verify motor operation; inspect control board.
Frequent cycling	Filter/airflow	Replace dirty filter; check for blocked vents; verify proper airflow.
Error codes displayed	System fault	Refer to error code chart in manual; reset if indicated; call for service if persistent.

Reset: Power cycle at circuit breaker or use RESET button on control board.

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