Mitsubishi MSZ-JX12WL & MUZ-JX12WL: 12,000 BTU/H Ductless Mini Split Heat Pump System
This document provides detailed features, specifications, and accessory information for the Mitsubishi Electric MSZ-JX12WL indoor unit and MUZ-JX12WL outdoor unit, a 12,000 BTU/H ductless mini-split heat pump system.
Indoor Unit Features (MSZ-JX12WL)
- 115V power supply
- 12-hour timer
- Dual Barrier Coating: Reduces contaminant buildup on the heat pump's inner surface for optimal airflow and easier maintenance.
- Econo Cool: Automatically adjusts airflow based on heat exchanger temperature, slightly increasing the set temperature to save energy while maintaining comfort.
- Four fan speed options: Low, Medium, High, Super-high.
- Multiple control options: Includes a back-lit screen hand-held Remote Controller, comfort app, third-party interfaces, and both wired and wireless controllers.
- Smart Dry Mode: Enhances humidity control by minimizing over-cooling.
Outdoor Unit Features (MUZ-JX12WL)
- Blue Fin Coating: Anti-corrosion treatment on heat exchanger fins to protect against salt, sulfur, and other airborne contaminants, especially in coastal and industrial areas.
- INVERTER-driven compressor: Provides precise capacity control to maintain the set temperature.
Specifications
Indoor Unit Specifications
| Parameter | Unit | Value |
|---|---|---|
| Maximum Capacity | Btu/h | 13,400 |
| Rated Capacity | Btu/h | 12,000 |
| Minimum Capacity | Btu/h | 3,600 |
| Maximum Power Input (Cooling at 95°F) | W | 1,430 |
| Rated Power Input (Cooling at 95°F) | W | 960 |
| Moisture Removal | Pints/h | 2 |
| Sensible Heat Factor | - | 0.82 |
| Power Factor [208V/230V] (Cooling at 95°F) | % | 98/98 |
| Maximum Capacity (Heating at 47°F) | Btu/h | 15,500 |
| Rated Capacity (Heating at 47°F) | Btu/h | 12,200 |
| Minimum Capacity (Heating at 47°F) | Btu/h | 4,500 |
| Maximum Power Input (Heating at 47°F) | W | 2,140 |
| Rated Power Input (Heating at 47°F) | W | 990 |
| Power Factor [208V/230V] (Heating at 47°F) | % | 100/100 |
| Maximum Capacity (Heating at 17°F) | Btu/h | 9,000 |
| Rated Capacity (Heating at 17°F) | Btu/h | 7,800 |
| Maximum Power Input (Heating at 17°F) | W | 1,670 |
| Rated Power Input (Heating at 17°F) | W | 900 |
| Maximum Capacity (Heating at 5°F) | Btu/h | 8,600 |
| Maximum Power Input (Heating at 5°F) | W | 1,400 |
| Maximum Capacity (Heating at -5°F) | Btu/h | 8,300 |
| SEER2 | - | 20 |
| EER2 | - | 12.5 |
| HSPF2 [IV] | - | 10 |
| COP at 47°F | - | 3.61 |
| COP at 17°F at Maximum Capacity | - | 1.56 |
| COP at 5°F at Maximum Capacity | - | 1.8 |
| COP at -5°F at Maximum Capacity | - | 1.76 |
| ENERGY STAR® Certified | - | Yes |
| Voltage, Phase, Frequency | V AC / V AC, Ø, Hz | 115 / 115, 1, 60 |
| Guaranteed Voltage Range | V AC | 103-127 |
| Voltage: Indoor - Outdoor, S1-S2 | V AC | 115 |
| Voltage: Indoor - Outdoor, S2-S3 | V DC | 24 |
| Short-circuit Current Rating [SCCR] | kA | 5 |
| Recommended Fuse/Breaker Size (Outdoor) | A | 20 |
| Recommended Wire Size [Indoor - Outdoor] | AWG | 14 |
| MCA | A | 1.4 |
| Fan Motor Output | W | 30 |
| Airflow Rate at Cooling, Dry | CFM | 168, 243, 333, 468 |
| Airflow Rate at Cooling, Wet | CFM | 151, 219, 300, 422 |
| Airflow Rate at Heating, Dry | CFM | 173, 239, 343, 395 |
| Sound Pressure Level [Cooling] | dB (A) | 22, 30, 38, 47 |
| Sound Pressure Level [Heating] | dB (A) | 23, 30, 38, 43 |
| Drain Pipe Size O.D. | inch [mm] | 5/8 [15.88] |
| External Finish Color | - | Munsell 0.7PB 9.2/0.4 |
| Unit Dimensions (W x D x H) | inch x inch x inch [mm x mm x mm] | 33 x 9-1/4 x 11-1/32 [838 x 235 x 280] |
| Package Dimensions (W x D x H) | inch x inch x inch [mm x mm x mm] | 36 x 13-1/4 x 11-1/2 [920 x 340 x 300] |
| Unit Weight | lbs [kg] | 20 [9] |
| Package Weight | lbs [kg] | 24 [10.50] |
| Fan Motor Type | - | DC Motor |
| IDU Operating Temp. Range (Cooling Intake Air Temp [Max/Min]) | °FDB, °FWB / °FDB, °FWB | 90, 73 / 67, 57 |
| IDU Operating Temp. Range (Heating Intake Air Temp [Max/Min]) | °FDB | 80 / 70 |
Outdoor Unit Specifications
| Parameter | Unit | Value |
|---|---|---|
| MCA | A | 17 |
| MOCP | A | 29 |
| Fan Motor Full Load Amperage | A | 0.5 |
| Fan Motor Output | W | 55 |
| Airflow Rate Cooling | CFM | 1,344 |
| Airflow Rate Heating | CFM | 1,152 |
| Defrost Method | - | Reverse Cycle |
| Coating on Heat Exchanger (Bluefin, Sea Coast) | - | Yes, Yes |
| Sound Pressure Level, Cooling | dB (A) | 49 |
| Sound Pressure Level, Heating | dB (A) | 51 |
| Compressor Type | - | Twin Rotary |
| Compressor Model | - | SRB140FQHMC |
| Compressor Oil [Type // Charge] | Type // oz | RM68EH // 11.8 |
| External Finish Color | - | Munsell 3Y 7.8/1.1 |
| Base Pan Heater | - | Optional |
| Unit Dimensions (W x D x H) | inch x inch x inch [mm x mm x mm] | 31-1/2 x 11-1/4 x 21/5/8 [800 x 285 x 550] |
| Package Dimensions (W x D x H) | inch x inch x inch [mm x mm x mm] | 36 x 13-1/4 x 11-1/2 [920 x 340 x 300] |
| Unit Weight | lbs [kg] | 20 [9] |
| Package Weight | lbs [kg] | 24 [10.50] |
| ODU Operating Temp. Range (Cooling Intake Air Temp [Max/Min]) | °FDB | 115 / 14 |
| ODU Operating Temp. Range (Cooling Thermal Lock-out / Re-start Temperatures) | °FDB | -1 / 3 |
| ODU Operating Temp. Range (Heating Intake Air Temp [Max/Min]) | °FDB, °FWB / °FDB, °FWB | 75, 65 / -5, -6 |
| ODU Operating Temp. Range (Heating Thermal Lock-out / Re-start Temperatures) | °FDB | -14 / -4 |
| Refrigerant Type | - | R454B |
| Pre-Charged Refrigerant Amount | lbs, oz | 2, 2 |
| Maximum Pre-Charged Piping Length | ft [m] | 25 [7.50] |
| Additional Refrigerant Charge Per Additional Piping Length | oz/ft | 0.22 |
| Gas Pipe Size O.D. [Flared] | inch [mm] | 3/8 [9.52] |
| Liquid Pipe Size O.D. [Flared] | inch [mm] | 1/4 [6.35] |
| Maximum Piping Length | ft [m] | 65 [20] |
| Maximum Height Difference | ft [m] | 40 [12] |
| Maximum Number of Bends | - | 10 |
Indoor Unit Accessories
| Category | Accessory Name | Model Number |
|---|---|---|
| Wired Remote Controller | Deluxe Wired MA Remote Controller | PAR-42MAAUB |
| Wired Remote Controller | Simple Direct Wired Remote Controller | PAC-SDW01RC-1 |
| Wired Remote Controller | Simple MA Remote Controller | PAC-YT53CRAU-J |
| Wired Remote Controller | Touch MA Wired Remote Controller | PAR-CT01MAU-SB |
| Lineset | 15 x 1/4 x 15 3/8 Lineset Twin-Tube Insulation | MLS143812T-15 |
| Lineset | 30 x 1/4 x 30 3/8 Lineset Twin-Tube Insulation | MLS143812T-30 |
| Lineset | 50 x 1/4 x 50 3/8 Lineset Twin-Tube Insulation | MLS143812T-50 |
| Lineset | 65 x 1/4 x 65 3/8 Lineset Twin-Tube Insulation | MLS143812T-65 |
| Condensate | Blue Diamond Advanced Mini Condensate Pump w Reservoir Sensor (208230V recommended) | X87-721 |
| Condensate | Blue Diamond MaxiBlue Advanced Mini Condensate Pump w Reservoir Sensor (110V up to 48000 BTUH recommended) | X87-711 |
| Condensate | Blue Diamond MegaBlue Advanced Condensate Pump w Reservoir Sensor | X87-835 |
| Condensate | Blue Diamond MicroBlue Mini Condensate Pump (110/208/230V up to 18000 BTUH) | X86-003 |
| Condensate | Blue Diamond Sensor Extension Cable 15 Ft | C13-103 |
| Condensate | Drain Pan Level SensorControl | SS610E |
| Condensate | Refco Condensate Pump 100-240 VAC up to 120000 BTUH | COMBI |
| Condensate | Refco Condensate Pump 100-240 VAC | GOBI-II |
| Condensate | REFCO PUMP 100-240 VAC 50/60 HZ | X86-011 |
| Condensate | Sauermann Condensate Pump | S130-230 |
| Control Interface | Airzone Wired Blueface Controller Black | AZZBSBLUEZEROCN |
| Control Interface | Airzone Wired Blueface Controller White | AZZBSBLUEZEROCB |
| Control Interface | Airzone Wireless Lite Controller Black | AZZBSLITERN |
| Control Interface | Airzone Wireless Lite Controller White | AZZBSLITERB |
| Control Interface | Airzone Wireless Think Controller Black | AZZBSTHINKRN |
| Control Interface | Airzone Wireless Think Controller White | AZZBSTHINKRB |
| Control Interface | IT Extender for kumo station | PAC-WHS01IE-E |
| Control Interface | kumo station for the Comfort app | PAC-WHS01HC-E |
| Control Interface | M-Net I/O Control Interface for M-Series | MAC-334IF-E |
| Control Interface | Procon BACnet and Modbus Interface | PAC-UKPRC001-CN-1 |
| Control Interface | Thermostat Interface for 3rd Party Thermostats | PAC-US445CN-1 |
| Control Interface | Wireless Interface Adapter for the Comfort app | PAC-USWHS002-WF-2 |
| Filter | Electro Static Anti-allergy Enzyme Filter | MAC-2320FT-E |
| Filter | Microparticle Filter | MAC-EMF515FT-E |
| Disconnect Switch | 30A600VUL fits 2 X 4 utility box - Black | TAZ-MS303 |
| Disconnect Switch | 30A600VUL fits 2 X 4 utility box - White | TAZ-MS303W |
| Power Supplies and Auxiliary Components | Backup Heat Relay Kit Adapter for CN24 or CN152 Connector | CN24RELAY-KIT-CM3 |
| Power Supplies and Auxiliary Components | Lockdown Bracket for Wireless Handheld Remote Controllers | RCMKP1CB |
| Wireless Remote Controller | RedLINK Wireless Remote Controller | MHK2 |
| Remote Sensor | Remote Temperature Sensor for MFZ MLZ and MSZ models | M21EAA307 |
| Remote Sensor | Wireless temperature and humidity sensor for the Comfort app | PAC-USWHS003-TH-1 |
| Drain Hose | Flexible Mini-Split Drain Hose | DRX-16 |
NOTES:
¹Requires MAC-334IF-E Interface to connect MA controller.
²Allows IDU Connection to MA Controller.
Outdoor Unit Accessories
| Category | Accessory Name | Model Number |
|---|---|---|
| Stand | 18 Single Fan Stand | QSMS1801M |
| Stand | 24 Single Fan Stand | QSMS2401M |
| Stand | Condenser Wall Bracket - Stainless Steel Finish | QSWBSS |
| Stand | Condenser Wall Bracket | QSWB2000M-1 |
| Stand | Outdoor Unit 3-14 inch Mounting Base Pair - Plastic | DSD-400P |
| Stand | Outdoor Unit Stand 12 High | QSMS1201M |
| Mini-Split Wire | 14 Gauge 4 wire Armored MiniSplit Cable 250 ft roll | SW144-250 |
| Mini-Split Wire | 14 Gauge 4 wire Armored MiniSplit Cable 50 ft roll | SW144-50 |
| Mini-Split Wire | 14 Gauge 4 wire MiniSplit Cable 250 ft roll | S144-250 |
| Mini-Split Wire | 14 Gauge 4 wire MiniSplit Cable 50 ft roll | S144-50 |
| Mini-Split Wire | Air Outlet Guide | MAC-881SG-E |
| Control/Service Tool | M- & P-Series Maintenance Tool Cable Set | M21EC0397 |
| Control/Service Tool | Maintenance Tool Interface | PAC-USCMS-MN-1 |
| Drain Socket | Drain Socket | MAC-871DS |
| Hail Guards | Hail Guard | HG-B4 |
| Mounting Pad | Condensing Unit Mounting Pad 16 x 36 x 3 | ULTRILITE1 |
| Snow/Rain Diverter | SnowRain Diverter | SRD-1 |
Dimensions
Indoor Unit Dimensions (MSZ-JX12WL)
The indoor unit dimensions are detailed in a diagram. Key dimensions include:
- Width: 33 inches (838 mm)
- Depth: 9-1/4 inches (235 mm)
- Height: 11-1/32 inches (280 mm)
- Installation plate dimensions and hole sizes are provided.
- Air inlet and outlet locations are indicated.
- Piping and drain hose connection points are shown with specific sizes.
(Refer to the original document for a visual representation of these dimensions and clearances.)
Outdoor Unit Dimensions (MUZ-JX12WL)
The outdoor unit dimensions are detailed in diagrams. Key dimensions include:
- Width: 31-1/2 inches (800 mm)
- Depth: 11-1/4 inches (285 mm)
- Height: 21-5/8 inches (550 mm)
- Required installation clearances are specified: 4 inches (100 mm) or more on front and sides, 8 inches (200 mm) or more on two sides if front/rear are clear, and 14 inches (350 mm) or more on the rear.
- Drain hole locations are indicated for different models.
- Refrigerant pipe joint sizes are specified: Liquid refrigerant pipe (flared) ø1/4 inch, Gas refrigerant pipe (flared) ø3/8 inch.
(Refer to the original document for a visual representation of these dimensions and clearances.)
Important Notes
General Notes:
- Specifications are subject to change without notice.
- All content is copyright © 2025 Mitsubishi Electric Trane HVAC US LLC. All rights reserved.
Specific Notes from Specifications:
- Cooling and Heating performance ratings are based on specific indoor and outdoor temperature and humidity conditions (e.g., Cooling at 95°F, Heating at 47°F, 17°F, 5°F, -5°F).
- Applications should be restricted to comfort cooling only; equipment cooling applications are not recommended for low ambient temperature conditions.
- Outdoor unit operating temperature ranges for cooling thermal lock-out/re-start and heating thermal lock-out/re-start are provided.
- System cuts out in heating mode and automatically restarts at specified temperatures.
