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INSTALLATION of VRV / VRF System Using Lokring 1


Roof Mount Outdoor Unit

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FINISHED OUTDOOR UNIT Avoid mechanical stress and misalignment of tubing by carefully laying out & supporting tubing prior to completing connections. Expansion loops and cutouts should always be included as per manufacturers guidelines.

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EURO FLARE CONNECTION R410A Lokring Euro Flares are available in sizes ¼ inch thru ¾ inch. These connections are used at Outdoor Units, Branch Selector Boxes, and Indoor Units.

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R410A Euro Flares take the Failure Modes Out!

R410A systems require exacting flare specifications and forming procedures. These specs are different than standard 45 degree SAE flares. Failure to follow manufacture’s specs on flare connections is the Number 1 cause of System Leaks

Lokring Euro Flares include replaceable preformed flare inserts, nut and Lokring connector half body, and are designed for use on R410A system. 5


Installing a Lokring R410A Euro Flare No joint compound or sealer should be applied to mating surfaces of flare faces. Threaded connection should be tightened to manufactures specs before completing Lokring connection. A new flare insert should be used each time the connection is loosened or taken apart for service. A drop of oil compatible with the system oil should be applied to the seal and back of the flare body to ensure accurate torque reading.

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Roof Access Connections

Lokring offers elbows and tees in both metric and SAE tube sizes.

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Lokring Long Radius Elbow versus Lokring Standard Elbow.

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Installing Insulation

Standard insulation will slide over Lokring connectors.

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Indoor Unit Connections

Lokring connectors allow for preassembly prior to final connection helping in awkward or tight locations.

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Completed Indoor Unit Connections

Tubing should be supported before completing Lokring connections.

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INSTALLATION OF THE TUBES

Pre-position parts for the installation, to help the assembly in constricted or tight areas.

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FINISHED INSTALLATION

Planning your piping layout and allowing for the last connection to be on the longest run, assists with avoiding stress points.

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Y-TUBES FOR MULTISPLITTING

Layout of an inverter system: LOKtube YT and YP branches are used to join various styles of indoor units to a single out door unit. LOKtube headers are also available.

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LOKtube YT-Branches at Multi Indoor Units

Application off LOKtube YT branches.

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THE COLD CLEAN CONNECTION

Internal Cleanliness comparison of a Lokring Connection and a Brazed Joint.

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Speed and Ease of Installation The LOKRING Tube Connection allows a fast and reliable connection of tubes, even of different material. This tube connection system is a cold, clean method that eliminates the need for Brazing. Field reports indicate a Labor savings of between 30% and 50% on various Ductless System Installations and also eliminates the need for nitrogen flow during installs. 18


HVAC Install Guide 2011