Professional-Grade Interconnection Solution for MRCOOL Mini-Split Systems
Key Specifications and Design Features
Installation Advantages for Contractors and DIY Installers
System Compatibility and Application
Performance Considerations
Installation Best Practices
Package Contents and Dimensions
Regulatory and Warranty Information
The Essential Connection for Optimal Performance
Shipping and Return
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Description
MRCOOL 25FT 1/4" x 1/2" Flared Line Set Kit (MC25-1412)
Professional-Grade Interconnection Solution for MRCOOL Mini-Split Systems
The MRCOOL MC25-1412 represents a purpose-engineered refrigerant line set specifically designed for seamless integration with MRCOOL's Olympus and Advantage 12K and 18K BTU mini-split systems. This precision-manufactured copper line set provides the critical connection between outdoor condensing units and indoor air handlers, ensuring optimal refrigerant flow and system performance.
Key Specifications and Design Features
This specialized line set provides the exact specifications required for proper operation of MRCOOL's smaller-capacity mini-split systems:
Precise Sizing: Features 1/4" liquid line and 1/2" suction line diameters, precisely calibrated for optimal refrigerant flow in 12K and 18K BTU applications
Optimal Length: 25-foot length provides sufficient reach for most standard residential installations while staying within maximum recommended length specifications
Professional Connections: Pre-flared ends with correctly sized fittings (3/8" liquid line fitting, 5/8" suction line fitting) ensure proper sealing at connection points
Premium Materials: Constructed from high-grade copper tubing that meets ASTM B280 standards for refrigeration applications
Factory Preparation: Line set arrives clean, capped, and ready for installation, eliminating field preparation requirements
The MC25-1412's exact specifications are critical for maintaining proper refrigerant flow, system charge, and operational efficiency in these smaller mini-split applications.
Installation Advantages for Contractors and DIY Installers
This line set incorporates several features that simplify the installation process:
Pre-Flared Ends: Factory-flared connections eliminate the need for flaring tools and reduce the risk of improper flares that can lead to refrigerant leaks
Correct Sizing: Properly sized for 12K and 18K BTU applications, eliminating guesswork and ensuring compatibility
Standard Length: 25-foot length covers most residential installations without requiring field modifications
Simple Connection Process: Designed for straightforward connection to MRCOOL Olympus and Advantage system fittings
Installation Flexibility: Sufficient length and flexibility to navigate various installation paths between indoor and outdoor units
These features significantly reduce installation time while promoting proper system setup—critical factors for both professional contractors and DIY installers.
System Compatibility and Application
The MC25-1412 line set is specifically designed for:
MRCOOL Olympus 12K BTU Mini-Split Systems
MRCOOL Olympus 18K BTU Mini-Split Systems
MRCOOL Advantage 12K BTU Mini-Split Systems
MRCOOL Advantage 18K BTU Mini-Split Systems
The precise sizing makes this line set incompatible with larger capacity mini-split systems that require different line diameters. This specificity ensures optimal performance within the designed application range.
Performance Considerations
The proper installation of this line set directly impacts several critical performance factors:
Refrigerant Flow Efficiency: Correct line sizing ensures proper refrigerant velocity and return oil flow
Thermal Transfer: Optimized line diameters minimize pressure drops that can reduce system efficiency
System Reliability: Factory-flared ends promote proper connections that minimize leak potential
Sound Performance: Proper sizing helps reduce refrigerant noise that can occur with incorrectly sized lines
Energy Efficiency: Maintaining manufacturer-specified line dimensions preserves the system's rated efficiency
Installation Best Practices
While the MC25-1412 simplifies installation, several best practices should be followed:
Maintain Minimum Bend Radius: Avoid sharp bends that can restrict refrigerant flow or damage the tubing
Proper Support: Use appropriate hangers/supports every 4-6 feet to prevent sagging
Insulation Integrity: Ensure the insulation remains intact and sealed throughout the installation
Connection Technique: Apply proper refrigeration oil to flare surfaces before connection
Torque Specifications: Follow manufacturer-recommended torque specifications when tightening flare nuts
Leak Testing: Pressure test all connections before system evacuation and charging
Package Contents and Dimensions
The MC25-1412 line set package includes:
25 feet of insulated 1/4" liquid line and 1/2" suction line copper tubing with factory-flared ends
Complete with appropriate connection fittings for MRCOOL Olympus and Advantage systems
Batteries (for system remote control)
The package dimensions (28-1/2"W x 3-1/2"H x 29"D) reflect the coiled configuration for shipping and storage.
Regulatory and Warranty Information
This product includes a Proposition 65 warning and has shipping restrictions to certain U.S. territories (GU, PR, VI). Unlike the main MRCOOL HVAC components, the line set itself does not carry a separate registered warranty, as it is considered an installation material rather than an active system component.
The Essential Connection for Optimal Performance
The MRCOOL MC25-1412 line set represents a critical component in the proper installation of Olympus and Advantage 12K and 18K BTU mini-split systems. By providing precisely sized, pre-flared refrigerant lines manufactured to exacting standards, this line set ensures the refrigerant connection between indoor and outdoor units maintains optimal flow characteristics—preserving system efficiency, reliability, and performance. For contractors and DIY installers working with these MRCOOL systems, the MC25-1412 eliminates the guesswork and specialized preparation often associated with refrigerant line installation, supporting both proper system function and installation efficiency.
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