Carrier 58MVP Furnace Installation Manual

The Carrier 58MVP is a high-efficiency, multi-speed gas furnace designed for residential heating applications. This variable-speed furnace features advanced comfort and efficiency technology, including modulating gas valve, variable-speed blower motor, and compatibility with Carrier's Infinity System control. Below are key sections for safety, installation procedures, electrical connections, startup, and troubleshooting.

Features at a Glance

Key components: Variable-speed ECM blower motor, modulating gas valve, stainless steel heat exchanger, integrated control board, pressure switches, and diagnostic LED.

Safety Precautions

Critical safety information for installers and homeowners.

1. Turn off electrical power and gas supply before installation or service.
2. Wear appropriate personal protective equipment (PPE).
3. Ensure proper ventilation and combustion air supply.
4. Verify gas line integrity with leak detection solution.
5. Follow all local codes and manufacturer specifications.

WARNING! Failure to follow safety procedures may result in fire, explosion, carbon monoxide poisoning, or electrical shock. Only qualified HVAC technicians should perform installation.

Pre-Installation Requirements

Site preparation and verification before installation.

1. Verify furnace model and size match application requirements.
2. Check existing ductwork for compatibility and proper sizing.
3. Ensure adequate clearance: 24" front, 6" sides, 6" rear, 24" above.
4. Confirm proper gas line size and pressure requirements.
5. Verify electrical service meets furnace requirements.

CAUTION! Improper sizing or installation may void warranty and create safety hazards.

Technical Specifications

• Model Series: 58MVP (40, 50, 60, 80, 100 series)
• Input Capacity: 40,000 to 120,000 BTU/hr
• Efficiency: Up to 98% AFUE
• Electrical: 115V, 60Hz, 1.2-6.8 amps
• Gas Type: Natural gas (convertible to LP)
• Gas Pressure: 3.5" WC natural gas, 10" WC LP
• Blower Type: Variable-speed ECM
• Airflow: 600-2000 CFM (depending on model)
• Venting: PVC, CPVC, or ABS (2" minimum)
• Dimensions: Varies by model (approx. 21"W x 21"D x 45"H)

Installation Procedures

Step-by-step furnace installation guidelines.

1. Position furnace: Place on level surface, ensure proper clearances.
2. Install filter rack: Mount appropriate filter system.
3. Connect ductwork: Secure supply and return air connections.
4. Install condensate drain: Route to appropriate drainage point.
5. Secure furnace: Anchor to floor or platform as required.

Tip: Use bubble level to ensure furnace is perfectly level for proper condensate drainage.

Electrical Connections

Wiring and electrical connections for proper operation.

1. Disconnect power at main electrical panel.
2. Connect line voltage: 115V supply with proper grounding.
3. Connect low voltage: Thermostat wiring (R, W, Y, G, C terminals).
4. Install disconnect switch: Within sight of furnace.
5. Verify polarity: Ensure correct hot and neutral connections.

WARNING! Electrical work must comply with NEC and local codes. Use copper conductors only.

Venting and Combustion Air

Proper venting system installation for safe operation.

1. Install PVC vent pipes: Use approved materials (PVC, CPVC, ABS).
2. Maintain slope: 1/4" per foot back to furnace for condensate drainage.
3. Secure joints: Use PVC cement and proper hangers.
4. Provide combustion air: Follow local code requirements for air intake.
5. Terminate properly: Maintain required clearances from windows and openings.

CAUTION! Improper venting may cause carbon monoxide buildup. Test with combustion analyzer.

Gas Line Connections

Gas supply connection procedures and testing.

1. Shut off gas supply at main valve.
2. Install sediment trap: Before gas connection to furnace.
3. Use proper pipe size: Based on length and BTU requirements.
4. Apply pipe dope: Use approved compound on male threads only.
5. Pressure test: Check for leaks with manometer or bubble solution.

WARNING! Gas leaks are extremely dangerous. Always test with leak detection solution.

Startup and Commissioning

Final startup procedures and system verification.

1. Restore electrical power and gas supply.
2. Set thermostat to heat mode and raise temperature setting.
3. Verify ignition sequence: Inducer motor, pressure switch, hot surface ignitor, gas valve.
4. Check gas pressure: Adjust if necessary per specifications.
5. Measure temperature rise: Ensure within rated range (35-65°F).
6. Verify airflow: Adjust blower speed as needed.
7. Test safety controls: Verify proper operation of limit switches.

Tip: Use combustion analyzer to verify CO levels and efficiency.

Maintenance Guidelines

Routine maintenance for optimal performance and longevity.

• Replace air filter monthly during heating season
• Clean flame sensor annually
• Inspect heat exchanger for cracks or corrosion
• Check condensate drain for obstructions
• Verify vent system integrity
• Lubricate inducer motor if required (check manual)
• Test safety controls and operation

CAUTION! Annual professional maintenance recommended for safety and efficiency.

Troubleshooting

Reset: Power cycle furnace to clear temporary fault codes.

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