International Comfort Products Furnace Manuals

International Comfort Products (ICP) furnaces are high-efficiency heating systems designed for residential and light commercial applications. These furnaces feature advanced combustion technology, variable-speed blowers, and multiple safety systems. Below are key sections covering safety guidelines, installation procedures, operation instructions, maintenance requirements, troubleshooting, and technical specifications for various ICP furnace models.

1. Safety Information 2. Model Identification 3. Installation Guidelines 4. Technical Specifications 5. Operating Instructions 6. Maintenance Procedures 7. Control System Overview 8. Venting Requirements 9. Electrical Connections 10. Troubleshooting Guide 11. Warranty Information

Safety Information

Critical safety precautions for ICP furnace installation, operation, and maintenance.

Hazard Type	Safety Precautions
Fire/Explosion	Keep combustible materials away from furnace; ensure proper clearance
Carbon Monoxide	Install CO detectors; ensure proper venting; regular inspection
Electrical Shock	Disconnect power before servicing; proper grounding required
Burns	Allow furnace to cool before servicing; hot surfaces marked
Gas Leaks	Use leak detection solution; no open flames during testing

Model Identification

Locate and interpret model and serial numbers for proper parts ordering and technical support.

Model number: Found on rating plate, indicates furnace capacity and features
Serial number: Identifies manufacturing date and specific unit
Rating plate: Located on inner door or cabinet, shows electrical and gas specifications
Product family: Identifies series (ComfortMaker, Heil, Tempstar, etc.)

WARNING! Always reference correct model number when ordering parts or seeking technical support.

Installation Guidelines

Proper installation procedures for ICP furnaces to ensure safety and optimal performance.

Location selection: Choose area with adequate combustion air and service clearance
Venting installation: Follow manufacturer specifications for vent pipe size and routing
Gas connection: Use proper pipe size; pressure test for leaks
Electrical wiring: Follow local codes; proper voltage and circuit protection
Ductwork connection: Secure with sheet metal screws; proper sealing
Startup procedure: Verify proper operation; check gas pressure and temperature rise

CAUTION! Installation must comply with local codes and manufacturer specifications.

Technical Specifications

Heating Capacity: 40,000 to 150,000 BTU/H depending on model
Efficiency Rating: 80% to 98% AFUE
Electrical Requirements: 115V/60Hz, 15 amp circuit
Gas Type: Natural gas or propane (conversion kit required)
Blower Type: Multi-speed or variable speed ECM motors
Venting: Category I (natural draft) or Category IV (sealed combustion)
Dimensions: Varies by model; check specific unit specifications
Sound Rating: Ultra-quiet operation with sound-insulated cabinets

Operating Instructions

Proper operation procedures for ICP furnace systems.

Thermostat Operation: Set desired temperature; system will cycle automatically. Use fan settings (Auto/On) as needed.

Normal Operation: Ignition sequence begins when thermostat calls for heat. Inducer motor starts, pressure switch proves draft, hot surface igniter glows, gas valve opens, main burners ignite. Blower starts after warm-up period.

Shutdown: System shuts down in reverse sequence when thermostat satisfied. Allow complete cooling cycle before turning off power.

Maintenance Procedures

Regular maintenance requirements for optimal furnace performance and longevity.

Monthly: Check air filter; replace if dirty
Seasonal: Inspect vent system; clean burners and heat exchanger
Annual: Professional inspection of gas pressure, heat exchanger, safety controls
Blower maintenance: Clean blower wheel and housing; check motor lubrication
Drain system: Clear condensate drain lines on high-efficiency models

Tip: Keep maintenance records for warranty validation and service history.

Control System Overview

ICP furnace control boards and safety systems.

Integrated furnace control: Monitors system operation and safety devices
Status lights: LED indicators show system status and error codes
Safety controls: Limit switches, pressure switches, rollout switches
Ignition system: Hot surface igniter with flame sensor
Blower control: Timed or temperature-activated blower operation
Communication: Some models support communicating thermostats
Diagnostic mode: Access through specific button sequences
Reset procedures: Manual reset of lockout conditions

WARNING! Only qualified technicians should service control boards and safety devices.

Venting Requirements

Proper venting installation for safe furnace operation.

Category I Venting: Uses natural draft; vertical vent required; proper sizing critical. Category IV Venting: Sealed combustion; PVC pipe used; specific slope and length requirements.

Electrical Connections

Electrical wiring requirements and connection procedures.

Follow NEC and local codes. Proper grounding essential. Low voltage wiring for thermostat and controls. High voltage wiring for blower and ignition system.

CAUTION! Disconnect all power before servicing electrical components.

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, door switch	Check circuit breaker; verify thermostat setting; ensure door closed properly.
No heat	Gas supply, ignition, limit switch	Verify gas valve on; check for spark/flame; reset limit switch if tripped.
Short cycling	Dirty filter, overheating, airflow	Replace filter; check for blocked vents; verify proper airflow.
Blower won't stop	Thermostat fan setting, relay	Check thermostat fan setting (Auto/On); inspect blower relay.
Error codes flashing	Control board diagnostics	Refer to specific error code in manual; reset system if applicable.

Reset: Power cycle or control board reset button if available.

Service: Contact qualified HVAC technician for complex issues.