American Standard HVAC Mitsubishi Electric NAXSKS12A112A Series Manual

The American Standard HVAC Mitsubishi Electric NAXSKS12A112A Series is a high-efficiency, multi-zone ductless mini-split heat pump system designed for residential and light commercial applications. It features inverter-driven compressor technology for precise temperature control, compatibility with multiple indoor units, advanced filtration, quiet operation, and smart control capabilities. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Outdoor condensing unit, Indoor wall-mounted/cassette/ducted units, Wireless remote controller, Refrigerant piping, Communication/power cables.

Installation Guidelines

Unpack and inspect all components. Installation must be performed by a qualified HVAC technician.

1. Select Location: Outdoor unit on stable, level pad with adequate clearance. Indoor units away from direct airflow obstructions.
2. Mounting: Secure outdoor unit with bolts. Mount indoor unit bracket level on wall.
3. Refrigerant Piping: Connect pre-charged linesets using flare fittings. Perform leak check.
4. Electrical Connections: Connect power wiring to designated terminals following local codes. Install disconnect switch.
5. Communication Wiring: Connect control wires between outdoor and indoor units.
6. Vacuum & Charge: Evacuate system to remove moisture and non-condensables. Release correct refrigerant charge per nameplate.

WARNING! Risk of electric shock and refrigerant exposure. Only trained personnel should install. Ensure power is disconnected during wiring.

First-Time Setup & Commissioning

After installation, power on the system and perform initial setup.

1. Power On: Turn on circuit breaker and disconnect switch.
2. Test Operation: Use remote to turn on system in Cooling mode. Verify airflow and compressor operation.
3. Configure Settings: Set clock, temperature units (°F/°C), and fan speed preferences via remote.
4. Check Drainage: Verify condensate drain line is properly installed and draining.
5. Register System: Complete warranty registration online or via mail.

CAUTION! Do not operate system if unusual sounds or smells are detected. Turn off power and contact installer.

Technical Specifications

• Model Series: NAXSKS12A112A (Outdoor Unit).
• System Type: Multi-Zone Ductless Heat Pump.
• Cooling Capacity: [e.g., 36,000 BTU/h].
• Heating Capacity: [e.g., 38,000 BTU/h].
• Power Supply: 208-230V, 1 Phase, 60Hz.
• Refrigerant: R-410A.
• SEER Rating: Up to [e.g., 20.5].
• HSPF Rating: Up to [e.g., 10.0].
• Operating Range (Cooling): Outdoor temp: [e.g., 14°F to 115°F].
• Operating Range (Heating): Outdoor temp: [e.g., -13°F to 75°F].
• Sound Level (Outdoor): As low as [e.g., 56 dB(A)].

Controls and Settings

Primary control via included wireless remote. Optional wall controller or smartphone app available.

Remote Buttons: POWER, MODE (Auto, Cool, Heat, Dry, Fan), TEMP ▲/▼, FAN SPEED, SWING, CLOCK, TIMER, FILTER RESET.

Settings Menu (via Remote): Mode Selection: Auto, Cool, Heat, Dry (Dehumidify), Fan Only. Temperature Setpoint: Adjustable in 1° increments. Fan Speed: Auto, Low, Medium, High, Quiet. Airflow Direction: Manual or Auto swing louvers. Timer: Set daily On/Off schedules. Filter Sign Reset: Reset indicator after cleaning filter. Advanced (Installer): Dip switch settings for addressing, thermistor adjustment, etc.

Connecting Indoor Units

System supports various indoor unit types (Wall-mounted, Ceiling Cassette, Ducted).

1. Ensure power to outdoor unit is OFF.
2. Connect refrigerant piping from outdoor unit to each indoor unit location.
3. Connect communication wiring from outdoor unit terminal block to each indoor unit.
4. Connect individual power supply to each indoor unit (if required by model).
5. After all connections, power on outdoor unit. The system will automatically recognize connected indoor units.

Tip: Refer to the specific indoor unit installation manual for mounting and wiring details.

Operation Modes

Select mode using the MODE button on the remote control.

1. AUTO: System automatically selects Cooling or Heating based on room temperature.
2. COOL: Cools the room. Set desired temperature and fan speed.
3. HEAT: Heats the room. The system may enter defrost cycle periodically in cold weather.
4. DRY: Reduces humidity while maintaining moderate cooling.
5. FAN: Circulates air without cooling or heating. Select fan speed.
6. i-See Sensor (if equipped): Uses infrared sensor to detect room temperature at occupant location for optimized comfort.

WARNING! Do not switch modes rapidly. Allow a few minutes between mode changes for system pressure stabilization.

Maintenance & Cleaning

Regular maintenance ensures efficiency and longevity. Disconnect power before servicing.

1. Air Filter: Clean every 2 weeks during operation. Remove, vacuum, or wash with lukewarm water. Dry completely before reinstalling.
2. Indoor Unit Coil & Housing: Wipe gently with a soft, dry cloth.
3. Outdoor Unit: Keep area clear of leaves, grass, and debris. Clean fins with a soft brush if clogged.
4. Condensate Drain: Check periodically for clogs.
5. Professional Service: Schedule annual maintenance by a qualified technician to check refrigerant charge, electrical components, and overall performance.

CAUTION! Do not use abrasive cleaners, gasoline, or hot water. Do not bend the delicate aluminum fins.

Regulatory & Safety Information

This equipment complies with FCC Part 15 rules. Operation is subject to the condition that it does not cause harmful interference. UL Listed/Certified for safety. Refrigerant handling must comply with EPA Section 608 regulations. This product contains fluorinated greenhouse gases. Do not vent refrigerant to atmosphere.

Copyright © [Year] American Standard Heating & Air Conditioning. Mitsubishi Electric is a trademark of Mitsubishi Electric Corporation. For support, visit www.americanstandard.com or contact American Standard Customer Care at 1-800- [Phone Number].

Troubleshooting

Reset: Turn system OFF at breaker for 5 minutes, then restore power to reset control board.

Service: For persistent issues, contact an authorized American Standard/Mitsubishi Electric dealer. Have model and serial numbers ready.