Fujitsu AOU36RLXFZ Installation Manual

The Fujitsu AOU36RLXFZ is a high-efficiency split-type air conditioning unit with R32 refrigerant, designed for residential and commercial applications. This 36,000 BTU system features inverter technology for energy savings, quiet operation, Wi-Fi connectivity, advanced airflow control, auto-swing louvers, and multiple operating modes including cooling, heating, fan, and dry functions. Below are key sections for safety precautions, installation procedures, electrical connections, refrigerant piping, commissioning, and maintenance guidelines.

Safety Precautions

Critical safety warnings for installation personnel and end users.

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

Unit Specifications

• Model: AOU36RLXFZ
• Cooling Capacity: 36,000 BTU/h (10.5 kW)
• Heating Capacity: 38,000 BTU/h (11.1 kW)
• Refrigerant: R32 (1.28 kg charge)
• Power Supply: 208-230V, 60Hz, 1Phase
• Operating Range: Cooling: 14°F to 115°F (-10°C to 46°C)
• Noise Level: Indoor: 24 dB(A), Outdoor: 52 dB(A)
• Dimensions: Indoor: 35.4"×12.6"×8.7", Outdoor: 35.4"×27.6"×13.4"
• Weight: Indoor: 22 lbs, Outdoor: 154 lbs

Installation Tools Required

Essential tools for proper installation:

1. Torque wrenches (for flare nuts and electrical connections)
2. Flaring tool set (for copper pipe connections)
3. Manifold gauge set (for pressure testing and vacuum)
4. Vacuum pump (capacity minimum 4 CFM)
5. Pipe cutter and reamer
6. Leak detector (electronic or bubble solution)
7. Multimeter (for electrical testing)
8. Level and measuring tape
9. Power drill with various bits

Site Preparation

Proper site selection ensures optimal performance and longevity.

1. Indoor Unit Location: Minimum 7 ft from floor, away from heat sources, with proper air circulation
2. Outdoor Unit Location: Well-ventilated area, minimum 12 inches clearance on all sides, protected from direct weather exposure
3. Drainage: Ensure condensate drain pipe has proper slope (minimum 1/100 gradient)
4. Wall Strength: Verify wall can support indoor unit weight (22 lbs + piping)
5. Pipe Routing: Plan shortest possible route between indoor and outdoor units

CAUTION! Avoid locations with excessive dust, oil mist, or corrosive gases.

Indoor Unit Installation

Step-by-step indoor unit mounting procedure.

1. Position mounting plate: Use level to ensure perfect horizontal alignment
2. Mark drill holes: Transfer plate hole positions to wall
3. Drill holes: Use appropriate wall anchors for wall type
4. Secure mounting plate: Tighten all screws securely
5. Drill wall hole: 3-inch diameter hole for piping connections (slope slightly downward outdoors)
6. Route piping and cables: Through wall hole to outdoor unit location
7. Hang indoor unit: Engage unit onto mounting plate hooks
8. Connect piping: Follow refrigerant piping instructions in section 8

Outdoor Unit Installation

Proper outdoor unit placement and securing.

1. Select location: Solid, level surface with adequate ventilation
2. Prepare foundation: Concrete pad or vibration-absorbing pads
3. Position unit: Lift carefully using proper equipment
4. Secure unit: Use anchor bolts or mounting brackets as needed
5. Ensure clearance: Minimum 12 inches from walls, 60 inches overhead
6. Weather protection: Install rain hood if exposed to direct rainfall
7. Anti-vibration: Use rubber pads if installed on balcony or sensitive areas

WARNING! Outdoor unit weighs 154 lbs - use mechanical lifting assistance.

Refrigerant Piping

Copper pipe preparation and connection procedures.

1. Cut pipes: Use pipe cutter for clean, square cuts
2. Remove burrs: Use reamer to ensure smooth interior
3. Flare connections: 45-degree flare angle, no scratches or deformities
4. Apply sealant: Use approved refrigerant oil on flare surfaces
5. Connect pipes: Hand-tighten first, then torque to specification (18-22 ft-lbs)
6. Insulate pipes: Use closed-cell insulation on both lines

Electrical Wiring

Power and communication cable connections.

1. Disconnect power: Ensure main breaker is OFF
2. Route cables: Separate power and communication cables
3. Strip wires: Appropriate length for terminal connections
4. Connect terminals: Follow wiring diagram precisely
5. Secure connections: Tighten terminal screws to specification
6. Ground both units: Essential for safety and proper operation

CAUTION! Incorrect wiring may damage electronic components.

Vacuum Drying & Charging

Removing moisture and air from refrigerant system.

1. Connect gauges: High and low pressure service ports
2. Start vacuum pump: Run for minimum 30 minutes
3. Check vacuum level: Should reach 500 microns or below
4. Hold test: Close valves, observe for pressure rise (max 100 microns in 5 minutes)
5. Charge refrigerant: Open service valves to release factory charge
6. Additional charge: If pipe length exceeds 25 feet, add 0.5 oz per extra foot
7. Leak test: Use electronic detector at all connection points

Commissioning & Test Run

Final verification and system activation.

1. Power on: Turn on circuit breaker
2. Remote control: Install batteries and test communication
3. Test cooling: Set to 68°F, verify cold air output
4. Test heating: Set to 75°F, verify warm air output
5. Check drainage: Verify condensate flows freely
6. Monitor operation: Listen for abnormal noises or vibrations
7. Measure temperatures: Use thermometer to verify performance
8. Customer instruction: Explain basic operation and maintenance

Maintenance & Troubleshooting

Regular Maintenance: Clean filters every 2 weeks, professional service annually.

Technical Support: Fujitsu Customer Service: 1-800-835-3444, www.fujitsugeneral.com