Carrier 95 Furnace Installation Manual

The Carrier 95 Furnace is a high-efficiency gas furnace designed for residential heating applications. With AFUE ratings up to 95%, this furnace features variable-speed blower technology, two-stage heating operation, durable heat exchanger construction, quiet operation, diagnostic LED indicators, and compatibility with various thermostat systems. Below are key sections for safety, installation procedures, electrical connections, startup, operation, and maintenance.

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

Safety Precautions

Critical safety information for proper furnace installation and operation.

Hazard	Precaution
Gas Leaks	Check all connections with soap solution; never use open flame
Electrical Shock	Disconnect power before servicing; follow local electrical codes
Carbon Monoxide	Ensure proper venting; install CO detectors in living areas
Fire Hazard	Maintain clearance from combustibles; keep area clean
Personal Injury	Wear safety glasses and gloves during installation

Pre-Installation Requirements

Essential preparations before beginning furnace installation.

Verify local codes and obtain necessary permits
Check furnace model and size match heating load requirements
Ensure adequate clearance: 24" front, 6" sides, 1" rear, 6" top
Confirm proper gas supply line size and pressure
Verify electrical service meets furnace requirements

WARNING! Installation must comply with all national and local codes. Only qualified technicians should perform installation.

Installation Procedures

Step-by-step furnace installation process.

Position furnace: Place on solid, level surface in approved location
Install filter rack and air filter
Connect return air duct: Ensure tight, sealed connection
Connect supply air duct: Use proper duct sealing methods
Install condensate drain line with proper slope and trap
Secure furnace to floor or platform as required

CAUTION! Furnace is heavy; use proper lifting equipment and techniques.

Electrical Connections

Wiring and electrical requirements for proper furnace operation.

Power Supply: 120V AC, 60Hz, 15A circuit
Thermostat: Low voltage connections (R, W, Y, G, C)
Grounding: Proper equipment grounding required
Blower Motor: ECM variable-speed motor
Control Board: Integrated diagnostic system

WARNING! Disconnect all power before making electrical connections.

Gas Line Connections

Natural gas or propane connection procedures.

Shut off gas supply at main valve
Install sediment trap in gas line
Use approved pipe thread compound or tape
Connect gas line to furnace gas valve
Check for leaks with soap solution
Verify gas pressure: 3.5" WC natural gas, 10" WC propane

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

Venting System

PVC vent pipe installation for high-efficiency operation.

Component	Requirement
Vent Material	Schedule 40 PVC or CPVC
Vent Size	2" or 3" diameter as specified
Slope	1/4" per foot toward furnace
Clearances	1" from combustibles
Termination	12" minimum from grade level

Startup and Commissioning

Initial startup procedures and system verification.

Verify all connections are complete and secure
Restore electrical power and gas supply
Set thermostat to heating mode
Check ignition sequence and flame operation
Measure temperature rise: 35-65°F
Verify proper airflow and duct static pressure
Check condensate drain operation

NOTE: Complete combustion analysis required for proper commissioning.

Operating Instructions

Normal furnace operation and user controls.

Thermostat Settings: Heat/Cool/Off, Fan Auto/On, Temperature setpoints

LED Indicators: Green - normal operation, Red - fault condition (refer to blink codes)

Two-Stage Operation: Low fire for mild weather, high fire for cold weather

Variable Blower: Automatically adjusts airflow for optimal comfort and efficiency

Maintenance Procedures

Routine maintenance for optimal performance and longevity.

Monthly: Check and replace air filter as needed
Annual: Professional inspection and cleaning
Clean burners and heat exchanger
Check condensate system and drain lines
Inspect vent system for obstructions
Verify safety controls operation

WARNING! Only qualified service personnel should perform internal maintenance.

Troubleshooting Guide

Common issues and corrective actions.

Symptom	Possible Cause	Corrective Action
No heat	Thermostat setting, power, gas supply	Check thermostat, circuit breaker, gas valve
Furnace short cycles	Dirty filter, restricted airflow	Replace filter, check ductwork
Blower doesn't run	Motor, capacitor, control board	Check power to blower, motor operation
Ignition failure	Gas pressure, igniter, flame sensor	Check gas supply, clean flame sensor
Water leakage	Clogged condensate drain	Clear drain line, check trap

Technical Specifications

Model Series: Carrier 95% AFUE Gas Furnace
Input BTU/H: 40,000 - 120,000 (varies by model)
AFUE Rating: Up to 95.5%
Stages: Two-stage heating operation
Blower Type: Variable-speed ECM motor
Gas Type: Natural gas or propane
Electrical: 115V/60Hz/1Ph
Sound Level: As low as 68 dBA
Warranty: 20-year heat exchanger, 5-year parts