Insulation; Refrigerant Piping System Insulation - LG MULTI V HYDRO KIT ARNH963K2A4 Installation Manual

INSULATION

Refrigerant Piping System Insulation

Refrigerant Piping System Insulation
All refrigerant piping from the outdoor unit to the Hydro Kits / indoor
units / heat recovery units must be insulated correctly for safety and
usage. Y-branch connections, header branch connections, refriger-
ant piping, field-provided isolation ball valves (if present), service
valves, and elbows must be properly and completely insulated using
closed cell pipe insulation (up to the indoor unit piping connections).
To prevent heat loss / heat gain through the refrigerant piping, all
refrigerant piping including liquid lines and vapor lines must be insu-
lated separately. Insulation must be a minimum 1/2 inches thick, and
thickness will need to be increased based on ambient conditions
and local codes. Table on next page lists minimum wall thickness
requirements for Ethylene Propylene Diene Methylene (EPDM)
insulation.
All insulation joints must be glued with no air gaps. Insulation mate-
rial 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. Protect
insulation inside hangers and supports with a second layer. 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 insula-
tion jackets, with a 1.84 lb./ft.
3
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. Check the fit of the insulation jacket after the header fitting and all run-out pipes are
installed. Mark all pipes at the point where the insulation jacket ends. Remove the jacket. Install field provided insulation on the run-out and
main trunk pipes first. Install the LG-provided insulation plugs on the ends of all unused header ports. Peel the adhesive glue protector slip
from the insulation jacket and install the clam-shell jacket over the fitting.
• 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 locals codes and the designer's instructions when selecting ethylene propylene diene methylene (EPDM) insulation wall thickness.
30
density, 1/2 inch thickness, and meet
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG Life's Good" is a registered trademark of LG Corp.
Figure 11: Typical Pipe Insulation, Power Wire and Communications
Cable Arrangement.
Figure 12: Hydro Kit Refrigerant Piping Insulation Close Up.
Inside Hydro Kit
Panel
Vapor Line
Insulation Material
Liquid Line
Pipe Sleeve
Insulation
Material
Min. 18 Gauge
Power/Communication
Cable
Insulation
Refrigerant
Piping