Mitsubishi Electric MSZ-LN Diamond Wall-Mounted Units Planning Manual
Living Environment Systems
Introduction
Mitsubishi Electric LES embodies extensive expertise for shared success: listening and understanding, developing intelligent products, providing competent advice, recognizing trends, shaping the future, and turning knowledge into solutions.
This planning manual provides comprehensive information for the Mitsubishi Electric MSZ-LN Diamond Series wall-mounted air conditioning units. These units offer cooling and heating in four housing colors, featuring the Plasma-Quad-Plus air purification system, 3D-i-see Sensor, WiFi Interface, and are ErP compliant. They are designed for use with R32 and R410A refrigerants and are compatible with MXZ multi-split outdoor units.
Product Overview
Model Series: MSZ-LN Diamond Wall Units
The MSZ-LN series includes indoor units for single-split and multi-split systems. The units are available in various capacities and colors:
- Single-Split Indoor Units (R32): MSZ-LN18VG2, MSZ-LN25VG2, MSZ-LN35VG2, MSZ-LN50VG2, MSZ-LN60VG2
- Available Colors: Natural White (MSZ-LN VG2W), Pearl White (MSZ-LN VG2V), Onyx Black (MSZ-LN VG2B), Ruby Red (MSZ-LN VG2R)
Technical Specifications Summary
| Model Combination | Cooling Capacity [kW] | Heating Capacity [kW] | Energy Efficiency Class (Cooling/Heating) |
|---|---|---|---|
| MSZ/MUZ-LN25VG2 | 2.5 (1.0-3.5) | 3.2 (0.8-5.4) | A+++/A+++ |
| MSZ/MUZ-LN35VG2 | 3.5 (0.8-4.0) | 4.0 (0.9-6.3) | A+++/A+++ |
| MSZ/MUZ-LN50VG2 | 5.0 (1.0-6.0) | 6.0 (1.0-8.2) | A+++/A++ |
| MSZ/MUZ-LN60VG(2) | 6.1 (1.4-6.9) | 6.8 (1.8-9.3) | A++/A++ |
Suitable Outdoor Units
The MSZ-LN indoor units can be connected to compatible Mitsubishi Electric outdoor units for single-split and multi-split systems.
Singlesplit Systems (R32)
- MSZ-LN18VG2 R/V/W/B with MUZ-LN25VG2
- MSZ-LN25VG2 R/V/W/B with MUZ-LN35VG2
- MSZ-LN35VG2 R/V/W/B with MUZ-LN50VG2
- MSZ-LN50VG2 R/V/W/B with MUZ-LN60VG
Multisplit Systems (R32)
Compatibility with MXZ-F Series outdoor units is detailed in a compatibility table, indicating which indoor units can be paired with various MXZ outdoor unit models.
Multisplit Systems (R410A)
These systems utilize LEV Kits (PAC-LV11M-J) or connection boxes (PAC-MK33BC/PAC-MK35BC) for connection with R410A outdoor units like PUMY-P series.
Technical Data
Dimensions and Clearances
Detailed diagrams show the dimensions of the indoor unit, mounting plate, and required clearances for installation. Key dimensions include:
- Indoor Unit: 890mm (width) x 307mm (depth) x 233mm (height)
- Mounting Plate: Features mounting holes and dimensions for wall attachment.
- Refrigerant Connections: Liquid line Ø6.0 mm, Gas line Ø10.0 mm (or Ø12.0 mm for MSZ-LN60VG2).
Sound Data
Sound pressure levels are provided for different fan speeds (Super High, High, Medium, Low, Quiet) in cooling and heating modes. Sound diagrams illustrate the octave band sound pressure levels.
- MSZ-LN18VG2: Cooling: 42 dB(A), Heating: 45 dB(A) (Super High)
- MSZ-LN25VG2: Cooling: 42 dB(A), Heating: 45 dB(A) (Super High)
- MSZ-LN35VG2: Cooling: 43 dB(A), Heating: 45 dB(A) (Super High)
- MSZ-LN50VG2: Cooling: 46 dB(A), Heating: 47 dB(A) (Super High)
- MSZ-LN60VG2: Cooling: 49 dB(A), Heating: 49 dB(A) (Super High)
Airflow Technical Data
Temperature Distribution
Contour plots illustrate temperature distribution patterns within a room for different models (MSZ-LN18VG2, MSZ-LN25VG2, MSZ-LN35VG2, MSZ-LN50VG2, MSZ-LN60VG2) in both cooling and heating modes, with high fan speed and auto airflow direction.
Airflow Distribution
Velocity contour plots show airflow distribution for various models in cooling and heating modes, indicating air velocity in m/s at different points in the room.
Refrigerant Connection
Refrigerant and Piping
The units are designed for R32 or R410A refrigerant. Outdoor units are pre-filled, and refrigerant may need to be added on-site. Piping design details (material, diameter, length) depend on the outdoor unit and should be referenced in its specific planning documents.
Refrigerant Connection Dimensions
Connection dimensions at the indoor unit are specified for liquid and gas lines:
- Liquid Line: Ø6.0 mm (1/4")
- Gas Line: Ø10.0 mm (3/8") for most models, Ø12.0 mm (1/2") for MSZ-LN60VG2.
Refrigerant Circuit Diagrams
Schematic diagrams illustrate the refrigerant flow for different model combinations (MSZ-LN18/25/35VG2 and MSZ-LN50/60VG2), showing connections to heat exchangers, temperature sensors, and piping.
Wiring Diagrams
Detailed wiring diagrams are provided for various MSZ-LN models, including component identification (fuses, motors, sensors, control boards) and connections to the outdoor unit and other modules. A legend explains the symbols used.
Electrical Connection
Execution of Electrical Lines
Electrical connections must be performed by qualified personnel. An all-current sensitive residual current device (FI) is mandatory. Polychloroprene-sheathed flexible cables are required. The grounding conductor must be longer than other conductors.
Singlesplit System with MUZ-LN VG(2) Outdoor Unit
The indoor unit receives power and control signals from the outdoor unit via lines S1, S2, and S3. The outdoor unit connects to the power supply via TB1. An optional remote control can be connected to TB5.
Multi-Split Systems MXZ
The MXZ outdoor units can connect to multiple indoor units (up to 6 for MXZ-6F). Connection terminals TB2, TB3, TB4, etc., are used for each indoor unit. Fuse ratings for MXZ outdoor units are specified based on their model and required cable cross-sections.
Accessories
Device Accessories
- Silver-ion Air Purification Filter (MAC-2390FT-E): Filters bacteria, pollen, and allergens. Requires rinsing with water.
- Plasma Odor Filter (MAC-3010FT-E): Removes odors and improves air quality. Requires cleaning with a vacuum or soaking in lukewarm water.
Regular cleaning of filters is recommended to maintain performance and reduce energy consumption.
Wired Remote Controls
- PAR-41MAA: A wired remote control offering full local operation functions with a backlit, menu-driven display.
- PAR-CT01MAA: An elegant touch-screen wired remote control with advanced features, customizable display, and optional Bluetooth connectivity (BLE) for app configuration and personalization. Available in white plastic and black aluminum-plastic finishes.
- PAC-YT52CRA: A compact wired remote control with basic functions: on/off, temperature, mode selection, and louver control.
An interface module (MAC-497IF-E) is required for connecting wired remote controls.
Interface Boxes and Network Modules
- I/O Interface Module (MAC-497IF-E): Enables external signal control for functions like on/off, operation status, and remote control lockout.
- M-Net Adapter (MAC-334IF-E): Connects M-Series units to the City Multi VRF data bus (M-Net) or allows M-Net control without bus integration using an additional power supply (PAC-SC51KUA).
- KNX (TP) Network Module (ME-AC/KNX1): Integrates M-Series units into KNX-based building automation systems.
- Modbus Adapter (ME-AC-MBS-1): Facilitates integration into Modbus RTU (RS485) networks.
- Intesis Bacnet Adapter (ME-AC-BAC-1): Enables integration into Bacnet MSTP or Bacnet IP networks.
Company Information
Mitsubishi Electric has locations across Germany to serve customers. Contact details for various regional offices are provided.
