LG ARUM072DTE5 - Outdoor Unit Y-Branch Kits; Installing for Heat Pump Operation

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MULTI V 5 Outdoor Unit Installation Manual
Due to our policy of continuous product innovation, some specications may change without notication.
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Outdoor Unit Y-Branches
Outdoor unit Y-branches can only be installed in a horizontal or vertical UP configuration.
The vertical DOWN configuration is not permitted.
When installed vertically, position the Y-branch at a level lower than the outdoor units it serves, so the straight-through leg is within ±3° of
plumb. When installed horizontally, the straight-through leg should be level, and the branch leg should be within ±5° of horizontal rotation.
Outdoor unit Y-branches must always be installed with the two port ends connected to the piping coming from the outdoor units, and the sin-
gle port end towards the indoor unit refrigerant piping system supporting the indoor units. Outdoor unit Y-branches are usually installed close
to the outdoor unit, leaving enough space for servicing and maintenance.
Indoor Unit Y-Branch Horizontal Conguration. Indoor Unit Y-branch Vertical Installation Alignment
Specications.
+5°
Horizontal
Plane
-5°
Branch Leg
Straight-through Leg
ELEVATION VIEW
Y-branch Inlet
-3° of Plumb+3° of Plumb
-3° of Plumb+3° of Plumb
Vertical DOWN Conguration for
Outdoor Unit Y-Branches
NOT PERMITTED.
Vertical UP Conguration for Indoor Unit
Y-Branches.
Outdoor Unit Y-Branch Kits
INSTALLING FOR HEAT PUMP
OPERATION
Diagram of an Incorrect Outdoor Unit Y-branch Installation.
To Next Branch
To Indoor Units
Y-Branch Insulation and Piping Detail.
LG-Supplied
Insulation Jacket
Field-Supplied
Insulation
Field-Supplied
Insulation
Field-Supplied Copper Piping
LG Supplied
Y-Branch
PLAN VIEW
No Substitutions on Piping Components
Only LG supplied Y-branch and Header ttings can be used to join one pipe segment to two or more segments.
Third-party
or eld-fabricated components such as tee’s, Y-ttings, couplings, headers, or other branch ttings are not permitted. The
only eld-provided ttings allowed in a Multi V piping system are 45° and 90° long radius elbows and full port ball valves (if
applicable).
ELEVATION VIEW