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Refrigerant Pipe Insulation
WARNING
•
Do not insulate gas and liquid pipes together as this can
result in pipe leakage and malfunction due to extreme
temperature fluctuations.
•
Always properly insulate the piping. Insufficient insulation
will result in condensation, reduced heating/cooling
performance, etc. Also, if the pipes aren't insulated
properly, condensation could potentially cause damage to
building finishes. Pay special attention to insulating the
pipes installed in the ceiling plenum.
•
Fully insulate the piping connections.
•
Follow local codes and the designer's instructions when
selecting ethylene propylene diene methylene (EPDM)
insulation wall thickness.
All refrigerant piping from the outdoor unit to the DOAS
units must be insulated correctly for safety and usage.
Y-branch connections, refrigerant piping, field-provided
isolation ball valves (if present), service valves, and
elbows must be properly and completely insulated using
closed cell pipe insulation. To prevent heat loss / heat
gain through the refrigerant piping, all refrigerant piping
including liquid lines and vapor lines must be insulated
separately.
•
Ambient temperature: 86°F humidity: 75% to 80%
RH: minimum thicken 9/16 in
•
If the ambient temperature exceeds 86°F and the
humidity 80% RH, then the minimum thickness is
3/4 in.
Ethylene Propylene Diene Methylene (EPDM) Insulation
must be a minimum 1/2 inches thick, and thickness will
need to be increased based on ambient conditions and
local codes
All insulation joints must be glued with no air gaps.
Insulation material must fit snugly against the refrigeration
pipe with no air space between it and the pipe. Insulation
passing through pipe hangers, inside conduit, and/or
sleeves must not be compressed.
All pipe insulation exposed to the sun and outdoor
elements must be properly protected with PVC, aluminum
vapor barrier, or alternatively placed in a weather-
resistant enclosure such as a pipe rack with a top cover;
and meet local codes. LG-provided Y-branches are
shipped from the factory with pre-formed peel-and-stick
foam insulation jackets, with a 1.84 lb/ft
thickness, and meet UL94 MF-1 flammability.
The design engineer must perform calculations to
determine if the factory-supplied insulation jackets are
sufficient to meet local codes and avoid sweating. Add
additional insulation if necessary.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
3
density, 1/2 inch
Due to our policy of continuous product innovation, some specifications may change without notification.
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