Fujitsu Slim Duct Installation Manual

The Fujitsu Slim Duct system is a high-efficiency ducted air conditioning solution designed for residential and commercial applications. This system features compact ductwork, advanced inverter technology, quiet operation, and flexible installation options. Below are key sections covering safety guidelines, system features, installation procedures, electrical connections, commissioning, maintenance, and troubleshooting.

Features at a Glance

Key components: Indoor slim duct unit, Outdoor condenser unit, Remote controller, Duct connectors, Drain pipe, Refrigerant piping.

Safety Precautions

Follow all safety guidelines during installation and maintenance.

1. Electrical Safety: Disconnect power before servicing. Use proper grounding.
2. Refrigerant Handling: Certified technicians only. Follow EPA guidelines.
3. Lifting Safety: Use proper equipment for heavy components.
4. Fire Prevention: Keep away from flammable materials.

WARNING! Only qualified HVAC technicians should install this system. Improper installation may cause injury or equipment damage.

Installation Requirements

Verify site conditions before installation.

1. Space Requirements: Minimum clearances around units as specified.
2. Structural Support: Ensure adequate support for indoor unit weight.
3. Electrical Supply: Verify voltage and amperage requirements.
4. Ductwork Planning: Plan duct routing and register locations.
5. Drainage: Plan condensate drain routing with proper slope.

CAUTION! Ensure installation site meets all specified requirements before proceeding.

System Specifications

• Cooling Capacity: 18,000 - 36,000 BTU/h
• Heating Capacity: 19,000 - 38,000 BTU/h
• Power Supply: 208-230V, 60Hz
• Refrigerant: R410A
• Noise Level: 24-38 dB(A)
• Duct Connections: 6-inch round or equivalent rectangular
• Dimensions (Indoor Unit): Varies by model
• Weight (Indoor Unit): 45-75 lbs
• Operating Temperature: Cooling: 14°F to 115°F, Heating: -4°F to 75°F

Ductwork Installation

Proper duct installation is critical for system performance.

Duct Sizing: Follow manufacturer's duct sizing charts. Maintain proper airflow velocity.

Installation Steps: 1. Position indoor unit with proper clearances 2. Connect supply and return ducts 3. Seal all connections with approved duct sealant 4. Install flexible connectors for vibration isolation 5. Ensure proper insulation on all ductwork 6. Install registers and grilles in designated locations

Electrical Connections

Follow local electrical codes and manufacturer specifications.

1. Disconnect all power before making connections.
2. Run dedicated circuit from main panel to outdoor unit.
3. Connect indoor unit to outdoor unit with communication cable. 4. Install disconnect switch within sight of outdoor unit. 5. Verify proper grounding of all components.

Tip: Use copper conductors only. Follow wire sizing specifications in technical data.

Refrigerant Piping

Proper refrigerant piping ensures optimal system performance.

1. Measure and cut piping to required lengths.
2. Deburr pipe ends and remove contaminants.
3. Install insulation on all refrigerant lines.
4. Bend pipes carefully to avoid kinks.
5. Connect piping using flare or braze connections.
6. Pressure test system before evacuation.
7. Evacuate system to 500 microns or less.
8. Charge with specified refrigerant quantity.

WARNING! Only EPA certified technicians may handle refrigerant. Follow all safety procedures.

Commissioning & Testing

Complete system testing before handing over to customer.

1. Power on system and check for error codes.
2. Test all operating modes (cooling, heating, fan).
3. Measure airflow at all registers. 4. Check temperature differential across coil. 5. Verify refrigerant pressures and superheat/subcooling. 6. Test thermostat and remote control functions. 7. Verify condensate drainage. 8. Program operating settings as required.

Maintenance Procedures

Regular maintenance ensures optimal performance and longevity.

Quarterly Maintenance: - Clean or replace air filters - Check condensate drain line - Inspect electrical connections - Clean indoor and outdoor coils

Annual Maintenance: - Comprehensive system inspection - Refrigerant level verification - Ductwork inspection - Performance testing

CAUTION! Always disconnect power before performing maintenance.

Regulatory Compliance

UL/CSA Certified: Meets North American safety standards. EPA Compliance: Uses R410A refrigerant. Energy Star: Meets efficiency requirements where applicable. Local Codes: Installation must comply with all applicable local building codes. For technical support, contact Fujitsu Technical Support at 1-888-888-3424 or visit www.fujitsugeneral.com.

Troubleshooting Guide

Reset Procedure: Turn power off for 5 minutes, then restart.

Service Support: 1-888-888-3424; www.fujitsugeneral.com