Outdoor Unit Y-Branch Kits - LG ARUM072BTE5 Installation Manual

INSTALLING FOR HEAT RECOVERY
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
single port end towards the refrigerant piping system supporting the heat recovery unit / indoor unit. 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 Heat Recovery Units
70
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 PER-
MITTED.
-3° of Plumb +3° of Plumb
Field-Supplied
Insulation
LG-Supplied
Insulation Jacket