Carrier 8000TS Furnace Manual

The Carrier 8000TS Furnace is a high-efficiency gas furnace designed for residential heating applications. This model features advanced combustion technology, variable-speed blower motor, electronic ignition, multi-speed operation, and integrated safety controls. With AFUE ratings up to 96%, it provides reliable and efficient heating performance. Below are key sections for safety, features, 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. Venting and Ductwork 7. Operating Instructions 8. Maintenance Procedures 9. Safety Features 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Heat exchanger, burner assembly, blower motor, gas valve, control board, flame sensor, pressure switches, and venting system.

Feature	Description
Heat Exchanger	Stainless steel primary and secondary heat exchangers
Blower Motor	Variable-speed ECM motor for efficient operation
Ignition System	Hot surface electronic ignition
Gas Valve	Modulating gas valve for precise temperature control
Control Board	Integrated furnace controller with diagnostic LEDs
Pressure Switches	Safety switches for venting verification
Flame Sensor	Monitors burner flame presence
Thermostat Connections	Standard 24V thermostat terminals
Filter System	Standard 1-inch or 4-inch media filter capability
Venting	PVC pipe compatible for direct venting

Installation Requirements

Professional installation required. Ensure proper clearances and local code compliance.

Location: Install in dry, clean area with adequate combustion air and service access.
Venting: Use approved PVC pipe for intake and exhaust; maintain proper slope.
Gas Connection: Use black iron pipe with drip leg; pressure test for leaks.
Electrical: 120V AC power supply with proper grounding and disconnect.
Ductwork: Ensure proper sizing and sealing for optimal airflow.

WARNING! Gas furnaces produce carbon monoxide; proper venting is critical. Installation must comply with local codes and manufacturer specifications.

First-Time Setup

Initial startup must be performed by qualified technician.

Verify installation: Check all connections, clearances, and venting.
Gas pressure adjustment: Set manifold pressure per specifications.
Blower speed settings: Configure cooling and heating speeds.
System checkout: Test ignition sequence, safety controls, and temperature rise.
Customer orientation: Explain operation, filter changes, and basic maintenance.

CAUTION! Never bypass safety controls. Only qualified personnel should perform initial startup.

Technical Specifications

Model Series: Carrier 8000TS
Fuel Type: Natural Gas or LP (with conversion kit)
Input BTU/H: 40,000 to 120,000 (varies by model)
AFUE Rating: Up to 96%
Blower Motor: Variable-speed ECM
Electrical: 115V/60Hz/1Ph
Gas Connection: 1/2" NPT
Venting: 2" or 3" PVC Schedule 40
Operating Temp Range: -30°F to 150°F ambient
Warranty: 20-year heat exchanger, 5-year parts

Controls and Settings

Integrated control board with LED status indicators and dip switch settings.

Control Board Features: Power LED, status LED, fault code display, blower control, gas valve control, ignition control.

DIP Switch Settings: Blower speeds (COOL, HEAT), fan off delay, thermostat type. Status Lights: Green (power), Yellow (normal operation), Red (fault condition). Fault Codes: Flash patterns indicate specific issues (refer to troubleshooting chart).

Venting and Ductwork

Direct vent system using PVC pipe for intake and exhaust.

Vent Pipe: Use only approved PVC Schedule 40 pipe.
Clearances: Maintain required distances from combustible materials.
Terminations: Install vent caps according to local codes.
Duct Sizing: Ensure proper CFM delivery to all rooms.
Airflow: Verify static pressure within specified range.

Tip: Regular inspection of vent terminations for blockages is essential for safe operation.

Operating Instructions

Normal operation controlled by thermostat settings.

Thermostat Setting: Set to HEAT mode and desired temperature.
Startup Sequence: Inducer motor starts, pressure switch verifies, igniter heats, gas valve opens.
Normal Operation: Burner lights, blower starts after heat exchanger warms.
Shutdown: Gas valve closes, blower continues for cool-down period.
Fan Operation: Use FAN ON for continuous circulation.

WARNING! Never operate furnace with access panels removed. Carbon monoxide hazard exists.

Maintenance Procedures

Regular maintenance ensures efficiency and safety.

Monthly: Check and replace air filter as needed.
Annual: Professional inspection and cleaning.
Components: Clean flame sensor, check heat exchanger, lubricate motor if required.
Venting: Inspect for obstructions or damage.
Drain System: Clear condensate drain lines and trap.

CAUTION! Turn off power and gas supply before performing any maintenance.

Safety Features

Multiple safety systems protect against hazardous conditions.

Safety Feature	Function
Flame Rollout Switches	Detects flame outside combustion chamber
High Limit Switch	Prevents overheating
Pressure Switches	Verifies proper venting operation
Flame Sensor	Confirms burner ignition
Gas Valve	Automatic shutoff if ignition fails
Condensate Overflow	Shuts down furnace if drain is blocked

Regulatory Information

UL certified and complies with ANSI Z21.47 standards. Natural gas models certified for US and Canada. Installation must comply with National Fuel Gas Code (NFPA 54) and local building codes. For technical support, contact Carrier at 1-800-CARRIER or visit www.carrier.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, safety lockout	Check circuit breaker, thermostat settings, reset if locked out.
No heat	Gas supply, ignition failure	Verify gas valve on, check for fault codes, inspect igniter.
Short cycling	Dirty filter, airflow issues	Replace filter, check blower, verify ductwork clear.
Blower won't stop	Thermostat fan setting	Check thermostat FAN setting (AUTO/ON).
Unusual noises	Motor, blower wheel, ductwork	Inspect for loose components, clean blower assembly.
Fault code flashing	System error	Count flashes and refer to fault code chart in manual.

Reset Procedure: Turn power off for 30 seconds, then restore.

Service: 1-800-CARRIER; www.carrier.com