Outdoor Unit Y-Branch Kits; Installing For Heat Pump Operation - LG ARUM072BTE5 Installation Manual

INSTALLING FOR HEAT PUMP
OPERATION

Outdoor Unit Y-Branch Kits

No Substitutions on Piping Components
Only LG supplied Y-branch and Header fittings can be used to join one pipe segment to two or more segments.
or field-fabricated components such as tee's, Y-fittings, couplings, headers, or other branch fittings are not permitted. The
only field-provided fittings allowed in a Multi V piping system are 45° and 90° long radius elbows and full port ball valves (if
applicable).
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 Configuration.
Straight-through Leg
ELEVATION VIEW
Y-branch Inlet
Diagram of an Incorrect Outdoor Unit Y-branch Installation.
To Indoor Units
56
Branch Leg
+5°
Horizontal
Plane
-5°
To Next Branch
Due to our policy of continuous product innovation, some specifications may change without notification.
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Indoor Unit Y-branch Vertical Installation Alignment
Specifications.
Vertical UP Configuration for Indoor Unit
Y-Branches.
-3° of Plumb +3° of Plumb
ELEVATION VIEW
Y-Branch Insulation and Piping Detail.
LG Supplied
Y-Branch
Field-Supplied
Insulation
PLAN VIEW
Field-Supplied Copper Piping
Third-party
Vertical DOWN Configuration for
Outdoor Unit Y-Branches
NOT PERMITTED.
-3° of Plumb +3° of Plumb
Field-Supplied
Insulation
LG-Supplied
Insulation Jacket