Carrier Furnace 58CVA Installation Manual

The Carrier 58CVA is a high-efficiency gas furnace with variable-speed blower motor, multi-speed inducer assembly, and advanced diagnostic controls. This upflow/horizontal flow furnace features two-stage gas valve operation, hot surface ignition, and compatibility with various thermostat systems. Below are key sections for safety, specifications, installation procedures, wiring, startup, and troubleshooting.

Features at a Glance

Key components: Two-stage gas valve, variable-speed ECM blower motor, hot surface ignitor, induced draft motor, pressure switches, flame sensor, and integrated control board.

Safety Precautions

Read all instructions before installation. Follow local codes and manufacturer guidelines.

1. Disconnect electrical power before servicing.
2. Verify gas supply is turned off during installation.
3. Use proper personal protective equipment (PPE).
4. Ensure adequate combustion air and proper venting.
5. Check for gas leaks with soap solution after connections.

WARNING! Failure to follow safety procedures may result in fire, explosion, carbon monoxide poisoning, or electrical shock. Installation must comply with all local codes and ordinances.

Installation Requirements

Professional installation recommended. Verify all components are included and undamaged.

1. Check furnace model number matches installation requirements.
2. Verify adequate space for service access and airflow.
3. Ensure proper gas line size and pressure.
4. Confirm electrical supply meets furnace requirements.
5. Check venting system compatibility.

CAUTION! Furnace must be installed by qualified personnel familiar with gas-fired equipment and local codes.

Specifications

• Model Series: 58CVA
• Input Capacity: 40,000 to 120,000 BTU/H (varies by model)
• Efficiency: Up to 96.6% AFUE
• Gas Type: Natural Gas (convertible to LP with kit)
• Gas Pressure: 3.5" WC natural gas, 10" WC LP gas
• Electrical: 115V, 60Hz, 1.5A max
• Motor Type: Variable-speed ECM
• Stages: Two-stage heating, variable-speed cooling
• Venting: PVC, CPVC, or ABS (check local codes)
• Dimensions: Varies by model (check specific unit)

Location and Clearance

Install in clean, dry area with adequate combustion air and service access.

Minimum Clearances: 1" from combustible materials on sides and rear, 24" front service clearance, 6" above unit for vent clearance.

Location: Indoor installation only. Must be protected from water and corrosive elements. Ensure level installation with proper support.

Venting and Combustion Air

Proper venting is critical for safe operation. Follow manufacturer guidelines for vent pipe sizing and installation.

1. Use approved PVC, CPVC, or ABS pipe for venting.
2. Maintain proper slope (1/4" per foot) toward furnace.
3. Install condensate drain per instructions.
4. Provide adequate combustion air per local codes.
5. Seal all joints with approved cement.

Tip: Test vent system for leaks before final installation.

Gas Supply Connection

Use black iron or approved flexible gas connector. Verify gas type and pressure.

1. Shut off gas supply at main valve.
2. Install sediment trap before gas valve.
3. Use pipe compound on male threads only.
4. Pressure test for leaks with soap solution.
5. Verify manifold pressure per specifications.

WARNING! Gas leak testing is mandatory. Never use open flame to check for leaks.

Electrical Wiring

Follow NEC and local electrical codes. Use proper wire sizing and overcurrent protection.

1. Disconnect power at service panel.
2. Connect 115V power supply to furnace.
3. Install properly sized disconnect switch.
4. Connect thermostat wires per wiring diagram.
5. Ground furnace per local codes.

CAUTION! Electrical shock hazard. Always disconnect power before servicing.

Ductwork Installation

Proper duct sizing and sealing are essential for efficient operation.

1. Size ducts according to Manual D calculations.
2. Seal all duct joints with approved mastic or tape.
3. Install proper filter rack and access.
4. Balance airflow for optimal performance.
5. Insulate ducts in unconditioned spaces.

Tip: Perform airflow measurements after installation to verify proper CFM.

Startup and Checkout

Complete system verification before placing in service.

1. Verify all connections are secure and proper.
2. Check gas pressure and adjust if necessary.
3. Test ignition sequence and flame operation.
4. Verify proper venting and draft.
5. Check temperature rise per specifications.
6. Test safety controls and limit switches.
7. Program thermostat for proper staging.

WARNING! Carbon monoxide hazard. Verify proper combustion and venting before leaving unit operational.

Troubleshooting

Diagnostic Codes: Refer to LED flash codes on control board for specific error indications.

Service: Contact authorized Carrier dealer for technical support. Carrier Customer Care: 1-800-CARRIER