Installing The Insulation; Insulating Piping Joints; Y-Branch Kit Insulation; Piping With Insulation Material - LG MULTI F Series Installation Manual

F
MULTI
WITH
F
MULTI MAX
• Do not insulate gas and liquid pipes together as this can result in pipe leakage and malfunction due to extreme temperature
fluctuations.
• Be sure to fully insulate the piping connections.

Installing the Insulation

1. Insulation material must be longer than the refrigerant piping.
Each vapor and liquid piping must be insulated separately.
2. Place the closed-cell ethylene propylene diene methylene
(EPDM) insulation material carefully around each refrigerant pipe
so as not to damage it. Be sure the insulation material cutting line
is placed upward.
3. Apply adhesive to both cut surfaces of the insulation and press
together. Allow adhesive to dry so that the bond is secure and
does not come apart.

Insulating Piping Joints

1. Push the EPDM insulation from the straight piping surrounding
the joint (elbow, outdoor unit to indoor unit piping connection
point, etc.) as close together as possible.
2. Cut a piece of insulation to fit the joint, overlapping the insulation
on the surrounding piping by at least one (1) inch.
3. Apply adhesive to bond all the ends.
4. Secure by completely wrapping narrow vinyl tape around the
insulation / joint so that there are no gaps.
5. Tape must be sufficient to cover the piping so it can fit into the
rear piping housing area at the back of the indoor unit or branch
distribution unit (Multi F MAX with LGRED systems only).

Y-Branch Kit Insulation

Each Y-branch kit comes with clam-shell type peel-and-stick insulation jackets molded to fit the Y-branch fittings—one for the liquid line, one
for the vapor line.
• Check the fit of the Y-branch clam-shell
insulation jacket after the Y-branch is
installed.
• Mark all the pipes at the points where the
insulation jacket ends.
• Remove the jacket.
• Install field-provided insulation on the run-
out and main pipes first.
• Peel the adhesive glue protector slip from
the insulation jacket, and install the clam-
shell jacket over the fitting.
Additional Insulation for Y-Branches Will be Required in Humid Environments.
form. If this happens, install 3/8 inch thick ethylene propylene diene methylene (EPDM) insulation that is plenum-rated with a heat-resistance factor
that follows applicable local, state, and federal codes.
Figure 68: Y-branch Insulation Detail.
Y-Branch Kit Insulation
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" is a registered trademark of LG Corp.
Figure 66: Correct Cutting Line Placement.
Correct
Cutting Line
Gas or Liquid
Insulation
Pipe (Insulated
Separately)
Figure 67: Piping with Insulation Material.
Liquid and Gas
Pipe Joints
INSULATION
Incorrect
L Liquid Pipe
Cutti Cutting Line
Gas Pipe pe
Insulation material
Field-Supplied Insulation Tape
Insulation for
Field-Installed Piping
57