Carrier Gas Furnace 58PAV Manual

The Carrier 58PAV is a high-efficiency gas furnace series featuring variable-speed blower motors, two-stage gas valves, and durable heat exchangers. Available in multiple sizes from 40,000 to 150,000 BTU/h with AFUE ratings up to 96.5%. 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. Specifications 5. Controls and Settings 6. Venting and Combustion Air 7. Operation and Maintenance 8. Electrical Connections 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Two-stage gas valve, variable-speed blower motor, durable aluminized steel heat exchanger, integrated control board, pressure switches, flame sensor, and igniter.

Feature	Description
Two-stage gas valve	Provides efficient low-fire and high-fire operation
Variable-speed blower	Quiet operation with improved air circulation
Heat exchanger	Durable aluminized steel construction
Integrated control	Monitors system operation and safety controls
Pressure switches	Ensures proper venting operation
Flame sensor	Detects burner flame for safety
Hot surface igniter	Reliable electronic ignition system
Filter cabinet	Standard 1-inch or 4-inch media filter capability
Gas connection	1/2-inch NPT gas inlet
Electrical connection	115V, 60Hz power supply

Installation Requirements

Unpack and inspect unit for shipping damage. Verify proper location and clearances.

Location requirements: Indoor installation only, minimum clearances as specified.
Venting: Proper PVC vent pipe sizing and routing per local codes.
Gas connection: 1/2-inch black iron pipe, leak test required.
Electrical: 115V dedicated circuit, proper grounding.
Ductwork: Properly sized and sealed return and supply ducts.

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

First-Time Setup

Complete installation verification before initial startup.

Gas pressure check: Verify inlet and manifold pressures per specifications.
Venting verification: Confirm proper draft and combustion air.
Electrical connections: Verify proper voltage and grounding.
Thermostat wiring: Connect compatible two-stage thermostat.
Initial startup: Follow lighting instructions on unit door.

CAUTION! Only qualified HVAC technicians should perform installation and startup. Improper installation can create hazardous conditions.

Specifications

Model Series: 58PAV (040-150)
Input BTU/h: 40,000 to 150,000
AFUE Rating: Up to 96.5%
Gas Type: Natural gas (LP conversion kit available)
Stages: Two-stage heating
Blower Type: Variable-speed ECM motor
Electrical: 115V, 60Hz, 5-12 amps
Venting: PVC, CPVC, or ABS (2-inch minimum)
Sound Rating: As low as 65 dBA
Warranty: 20-year heat exchanger, 5-year parts

Controls and Settings

Integrated furnace control board with status LED for diagnostics. Thermostat connections for W1, W2, G, R, C.

Control Board: Monitors safety devices, controls blower operation, provides diagnostic codes via LED flash patterns.

Settings: Blower off delay, blower on delay, heating speed settings (low and high stage). Diagnostic codes displayed via LED flash patterns for troubleshooting. DIP switches for blower timing and other configuration options.

Venting and Combustion Air

Direct vent or conventional venting options available. PVC pipe required for direct vent applications.

Direct vent: Separate intake and exhaust pipes, minimum 2-inch diameter.
Conventional vent: B-vent through roof, proper clearances required.
Combustion air: Ensure adequate fresh air supply per installation requirements.
Pipe routing: Minimum slope, proper supports, sealed joints.

Tip: Always verify proper draft and combustion before leaving installation.

Operation and Maintenance

Regular maintenance ensures optimal performance and efficiency.

Filter replacement: Monthly inspection, replace as needed (1-3 months).
Annual inspection: Qualified technician should perform complete system check.
Burner inspection: Clean and verify proper flame pattern annually.
Heat exchanger: Visual inspection for cracks or damage.
Blower maintenance: Clean blower wheel and housing annually.
Drain system: Clear condensate drain lines and trap regularly.
Safety devices: Test pressure switches, rollout switches, flame sensor.

WARNING! Turn off electrical power and gas supply before performing any maintenance. Only qualified personnel should service gas components.

Electrical Connections

115V power supply with proper grounding. Thermostat connections for system control.

Care & Cleaning

Turn off power before cleaning. Keep unit area clear of debris and flammable materials.

CAUTION! Do not use water or liquid cleaners on electrical components. Keep combustion air intake clear of obstructions.

Regulatory Information

UL listed and ANSI certified. Complies with U.S. Department of Energy efficiency standards. Manufactured to meet or exceed industry safety standards. 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, door switch	Check circuit breaker, thermostat setting, door switch engagement.
No heat	Gas supply, igniter, flame sensor	Verify gas valve on, check igniter operation, clean flame sensor.
Short cycling	Filter, venting, overheating	Replace filter, check for vent restrictions, verify proper airflow.
Blower not running	Motor, capacitor, control board	Check for power to motor, test capacitor, verify control signal.
Lockout condition	Safety device tripped	Reset power, check diagnostic LED for error code.

Reset: Turn power off for 30 seconds, then restore to reset control board.

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