installation manual icp furnace gua120a020in

The ICP GUA120A020IN is a high-efficiency gas furnace designed for residential heating applications with 120,000 BTU input capacity, multi-speed blower motor, electronic ignition system, durable heat exchanger, and compatibility with various thermostat systems. Below are key sections for safety guidelines, installation procedures, electrical connections, startup procedures, maintenance, and troubleshooting.

1. Safety Information 2. Pre-Installation Requirements 3. Installation Procedures 4. Electrical Connections 5. Gas Line Connections 6. Venting Requirements 7. Startup and Commissioning 8. Operating Instructions 9. Maintenance Schedule 10. Troubleshooting Guide 11. Technical Specifications

Safety Information

Critical safety warnings and precautions for proper furnace installation and operation.

Hazard Type	Precaution
Fire/Explosion	Keep combustible materials away from furnace
Carbon Monoxide	Ensure proper venting and regular inspection
Electrical Shock	Disconnect power before servicing
Gas Leaks	Check all connections with leak detection solution
Hot Surfaces	Allow furnace to cool before servicing

Pre-Installation Requirements

Site preparation and requirements before furnace installation.

Location: Select area with adequate clearance and combustion air
Foundation: Level, solid surface capable of supporting furnace weight
Clearances: Maintain minimum clearances as specified in manual
Combustion Air: Ensure adequate fresh air supply for proper operation

WARNING! Installation must comply with local codes and ordinances. Professional installation recommended.

Installation Procedures

Step-by-step furnace installation instructions.

Position furnace in designated location, ensuring level placement
Connect return air duct to furnace return air opening
Connect supply air duct to furnace supply air opening
Install condensate drain line per local codes
Secure furnace to floor or platform as required

CAUTION! Use proper lifting techniques; furnace is heavy. Two-person lift recommended.

Electrical Connections

Wiring and electrical connection requirements.

Power Supply: 120V AC, 60Hz, 15 Amp circuit
Thermostat: Low voltage connections (R, W, G, Y, C)
Grounding: Proper equipment grounding required
Blower Motor: Multi-speed ECM motor with variable settings

WARNING! All electrical work must be performed by qualified personnel following NEC guidelines.

Gas Line Connections

Natural gas connection procedures and requirements.

Shut off gas supply at main valve
Install sediment trap in gas line before furnace connection
Use approved pipe thread compound on all connections
Pressure test all connections for leaks
Connect flexible gas connector if required by local codes

DANGER! Gas leaks can cause explosion or fire. Test all connections thoroughly.

Venting Requirements

Proper vent system installation for safe operation.

Vent Type	Requirements
PVC Vent	Schedule 40 PVC approved for Category IV furnaces
Vent Slope	1/4 inch per foot back to furnace
Clearances	Maintain required clearances from combustible materials
Termination	Proper outdoor termination location and height

Startup and Commissioning

Initial startup procedures and system verification.

Verify all electrical and gas connections are complete
Open gas supply valve and check for leaks
Set thermostat to heating mode and raise temperature setting
Verify proper ignition sequence and flame establishment
Check gas pressure and adjust if necessary
Measure temperature rise and adjust blower speed if needed

NOTE: Complete combustion analysis recommended for optimal performance.

Operating Instructions

Normal furnace operation and user controls.

Thermostat Settings: Set desired temperature; furnace will cycle automatically. Filter Replacement: Replace air filter every 1-3 months. System Switch: ON for normal operation, OFF for service. Blower Operation: Automatic during heating cycle; continuous fan option available.

Maintenance Schedule

Recommended maintenance intervals and procedures.

Monthly: Check air filter; replace if dirty
Annually: Professional inspection and cleaning
Seasonal: Check vent system for obstructions
As Needed: Clean flame sensor and burners

IMPORTANT: Regular maintenance ensures efficiency and prevents breakdowns.

Troubleshooting Guide

Common problems and solutions for furnace operation.

Symptom	Possible Cause	Corrective Action
No heat	Thermostat setting, power, gas supply	Check thermostat setting; verify power and gas supply; reset if needed
Furnace not starting	Limit switch, pressure switch	Check limit and pressure switches; reset if tripped
Blower not running	Motor, capacitor, control board	Check blower motor and capacitor; verify control board operation
Frequent cycling	Filter, airflow, thermostat	Replace filter; check airflow; verify thermostat location
Unusual noises	Motor, blower wheel, ductwork	Inspect motor and blower assembly; check duct connections

Technical Specifications

Model: GUA120A020IN
Input BTU: 120,000 BTU/HR
Output BTU: 96,000 BTU/HR
Efficiency: 80% AFUE
Gas Type: Natural Gas
Electrical: 120V/1Ph/60Hz
Blower Type: Multi-speed ECM
Dimensions: Refer to unit data plate
Weight: Approximately 150 lbs

Service: Contact qualified HVAC technician for all service needs.