Carrier Furnace 58MVB Installation Manual

The Carrier 58MVB is a high-efficiency multi-speed gas furnace designed for residential heating applications. This variable-capacity furnace features advanced combustion technology, electronic ignition, multi-speed blower motor, 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: Multi-speed induced draft motor, hot surface igniter, stainless steel heat exchanger, integrated control board, pressure switches, and flame sensor.

Safety Precautions

Critical safety information for proper installation and operation.

1. Disconnect electrical power before servicing or installing.
2. Verify gas type matches furnace rating plate (natural gas or propane).
3. Ensure proper combustion air supply and venting.
4. Install carbon monoxide detectors in living spaces.
5. Follow all local codes and manufacturer specifications.

WARNING! Failure to follow safety procedures can result in fire, explosion, carbon monoxide poisoning, or electrical shock. Installation must be performed by qualified personnel.

Specifications

• Model Series: 58MVB
• Input Capacity: 40,000-120,000 BTU/H (varies by model)
• Efficiency: Up to 96% AFUE
• Gas Type: Natural gas or propane (field convertible)
• Electrical: 120V AC, 60Hz, 15 amp circuit
• Blower Motor: Multi-speed ECM
• Venting: PVC or CPVC (2-inch minimum)
• Dimensions: Varies by model (check specific unit)
• Weight: 90-150 lbs depending on model
• Sound Level: As low as 65 dBA

Pre-Installation Requirements

Site preparation and verification before installation.

1. Verify furnace location meets clearance requirements (combustible materials).
2. Ensure adequate combustion air supply per local codes.
3. Check existing ductwork for compatibility and sizing.
4. Verify electrical service meets furnace requirements.
5. Confirm gas line size and pressure are adequate.
6. Plan venting route and verify materials available.

CAUTION! Improper site preparation can lead to performance issues or safety hazards.

Installation Procedures

Step-by-step furnace installation process.

1. Position furnace: Place on level surface, ensure proper clearances.
2. Install filter rack: Mount according to airflow direction.
3. Connect ductwork: Secure supply and return ducts properly.
4. Mount furnace: Secure to floor or platform as required.
5. Install condensate drain: Route to appropriate drainage point.
6. Verify level: Ensure furnace is level for proper drainage.

WARNING! Furnace must be level for proper condensate drainage and operation.

Electrical Wiring

Proper electrical connections for safe operation.

1. Disconnect power at main electrical panel.
2. Route 120V power supply to furnace junction box.
3. Connect ground wire to furnace ground terminal.
4. Wire thermostat connections to control board.
5. Connect humidifier or accessory wiring if applicable.
6. Verify all connections are secure and properly insulated.

Tip: Use wire nuts and electrical tape for all connections. Follow NEC and local electrical codes.

Gas Line Connection

Gas supply connection and leak testing procedures.

1. Shut off gas supply at main valve.
2. Install sediment trap upstream of gas valve.
3. Use approved pipe thread compound or tape on connections.
4. Connect gas line to furnace gas valve.
5. Perform leak test with soap solution at all connections.
6. Verify gas pressure at manifold (3.5" WC natural gas).

WARNING! Gas leaks can cause explosion or fire. Always perform leak test before operating furnace.

Venting System

Combustion air intake and flue gas exhaust installation.

1. Install PVC vent pipes per manufacturer specifications.
2. Maintain proper slope for condensate drainage (1/4" per foot).
3. Use appropriate PVC primer and cement for joints.
4. Install termination caps with proper clearances from openings.
5. Verify vent lengths do not exceed maximum specified.
6. Secure all vent pipes with appropriate hangers.

CAUTION! Improper venting can cause carbon monoxide buildup. Test system operation after installation.

Startup and Commissioning

Final verification and system startup procedures.

1. Verify all connections are complete and secure.
2. Restore electrical power to furnace.
3. Set thermostat to heating mode and raise temperature.
4. Observe ignition sequence and flame establishment.
5. Check temperature rise across heat exchanger.
6. Verify proper airflow and duct temperatures.
7. Test safety controls and limit switches.
8. Complete installation checklist and provide to homeowner.

WARNING! Never bypass safety controls during testing. Replace defective components immediately.

Maintenance

Routine maintenance procedures for optimal performance.

• Replace air filter monthly during heating season
• Clean flame sensor annually
• Inspect heat exchanger for cracks or damage
• Check condensate drain system for blockages
• Verify vent system is clear and unobstructed
• Lubricate blower motor if required (check manual)

CAUTION! Always disconnect power before performing maintenance. Annual professional inspection recommended.

Troubleshooting

Reset: Power cycle furnace to clear temporary fault codes.

Service: Contact authorized Carrier dealer for professional service. 1-800-CARRIER