ICP Furnace WFAR100C048B1 Manual

The ICP WFAR100C048B1 is a high-efficiency gas furnace with 100,000 BTU input capacity, 80% AFUE rating, multi-speed blower motor, electronic ignition system, durable heat exchanger, and built-in safety controls. Designed for residential forced-air heating systems with compatibility for central air conditioning. Below are key sections for safety, specifications, installation, operation, maintenance, and troubleshooting.

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

Features at a Glance

Key components: Heat exchanger, blower assembly, gas valve, electronic ignition, pressure switches, limit controls, venting system.

Feature	Description
Heat Exchanger	Durable aluminized steel construction
Blower Motor	Multi-speed ECM motor for efficient airflow
Ignition System	Hot surface electronic ignition
Gas Valve	Automatic gas flow regulation
Pressure Switches	Safety verification of venting operation
Limit Controls	Over-temperature protection
Venting	Category I venting system
Filter System	Standard 1-inch filter slot
Thermostat Connection	Standard 24VAC control wiring
Power Requirements	120V AC, 60Hz

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

Location: Install in approved spaces with proper clearances and combustion air.
Gas Connection: Use approved gas piping materials; pressure test required.
Electrical: Connect to dedicated 120V circuit with proper grounding.
Venting: Install approved vent piping with proper slope and termination.
Ductwork: Ensure proper sizing and sealing of supply/return ducts.

WARNING! Gas appliances can be hazardous; installation must comply with all codes. Carbon monoxide hazard exists with improper installation.

First-Time Setup

Initial startup must be performed by qualified technician.

Verify all connections: Gas, electrical, venting, and ductwork.
Check gas pressure: Adjust manifold pressure per specifications.
Test safety controls: Verify operation of limit switches and pressure switches.
Commission system: Check combustion performance and temperature rise.
Program thermostat: Set up heating schedule and temperature settings.

CAUTION! Never attempt first startup without proper training and equipment.

Technical Specifications

Model: WFAR100C048B1
Input Capacity: 100,000 BTU/H
Output Capacity: 80,000 BTU/H
AFUE Rating: 80%
Gas Type: Natural Gas
Manifold Pressure: 3.5" W.C.
Blower Speeds: Multi-speed ECM
Electrical: 120V, 60Hz, 15A circuit
Temperature Rise: 35-65°F
Venting: Category I
Dimensions: Standard upflow configuration

Controls and Settings

Integrated control board with LED status indicator. Access via control panel cover.

Control Board: LED status lights for diagnostic codes, dip switch settings for blower speeds and timing.

Thermostat Settings: Heat/Off/Auto, fan On/Auto, temperature setpoint. Blower Settings: Heating and cooling speeds adjustable via dip switches. Timing: Adjustable fan on/off delays. Safety: Automatic lockout with diagnostic codes.

System Connections

Gas: 1/2" NPT gas connection. Electrical: 120V power and 24V thermostat connections. Vent: 4" round vent connector. Duct: Supply and return plenum connections.

Turn off gas and electrical power before making connections.
Use approved pipe thread sealant on gas connections.
Verify proper polarity on electrical connections.
Ensure vent piping maintains proper slope and clearances.

Tip: Always use two wrenches when making gas connections to prevent damage.

Operating Procedures

Normal operation controlled by thermostat.

Set thermostat to desired temperature and HEAT mode.
Furnace will initiate ignition sequence when heat demanded.
Normal cycle: Inducer motor starts, pressure switch proves, igniter heats, gas valve opens, main burners ignite.
Blower starts after heat exchanger warm-up delay.
System shuts down when thermostat satisfied.
Filter replacement: Replace 1-inch filter every 1-3 months.

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

Safety Features

Flame Rollout Switches: Detect improper burner operation. Limit Switches: Prevent over-temperature conditions. Pressure Switches: Verify proper venting operation. Ignition Control: Safe start-up and shutdown sequences.

Maintenance & Cleaning

Annual professional maintenance recommended. Monthly filter inspection required.

CAUTION! Turn off gas and electrical power before any maintenance. Only qualified technicians should service internal components.

Regulatory Information

ANSI Z21.47: Certified for natural gas operation. UL: Listed for safety standards. CSA: Certified for Canadian installations. All installations must comply with National Fuel Gas Code NFPA 54 and local codes. For technical support, contact ICP at 1-800-427-2983 or visit www.icpindex.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No heat	Thermostat/Power/Gas	Check thermostat setting; verify power and gas supply; check filter.
Furnace locks out	Safety device tripped	Check diagnostic lights; reset power; call for service if recurring.
Blower won't stop	Thermostat/Fan limit	Check thermostat fan setting; verify fan limit control operation.
Unusual noises	Mechanical issues	Check for loose components; verify blower wheel condition; call technician.
Pilot/ignition failure	Gas/Electrical	Verify gas supply; check igniter condition; ensure proper grounding.

Reset: Turn power off for 30 seconds then restore.

Service: 1-800-427-2983; www.icpindex.com