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REFRIGERANT PIPING
Installation Overview / Special Applications
Installation
Single Zone Four-Way Ceiling-Cassette systems are one-to-one systems. There is a direct piping connection between the outdoor unit and
the indoor unit. The majority of installations have the indoor unit being installed at a higher position than the outdoor unit. However, if the
outdoor unit be installed at a higher position than the indoor unit, the basic pipe connections are the same (see below). Refer to the tables in
the "Connection Limitations" section for specific length limitations in conjunction with outdoor unit and indoor unit positioning.
NOTE
•
• Always follow local codes regarding piping and accurate support spacing along the piping system.
• Always include insulation on all refrigerant and drain piping to ensure condensate does not form and cause damage to walls, floors, etc.
Special Applications
If an additional drain hose is necessary, the end of drain outlet must
be routed above the ground. Secure the drain hose appropriately.
When the Outdoor Unit is Installed Below the Indoor Unit:
1. Use a conduit, piping set cover, or bundle the (separately) insu-
lated refrigerant piping, the drain hose, and the communications /
connection (power) cable together.
2. Make sure to include some slack in the wiring. Wiring must be
installed in an upwards direction to prevent water from accessing
into the control box.
3. Secure the conduit, piping set cover, or bundle along the outside
wall using saddles or a similar type of piping support.
4. Seal any openings in the wall that are around the piping.
When the Outdoor Unit is Installed Above the Indoor Unit:
1. Use a piping set cover, or bundle the (separately) insulated
refrigerant piping and the communications / connection (power)
cable together up to the outdoor unit service valves.
2. Make sure to include some slack in the wiring. Wiring must be
installed in upwards direction to prevent water from accessing the
control box.
3. If necessary, secure the piping set cover or bundle along the
outside wall using saddles or a similar type of piping support.
4. Ensure the drain hose from the indoor unit is installed away
from the outdoor unit, and in a downward direction. If necessary,
secure along the outside wall using saddles or a similar type of
support.
5. Seal any openings in the wall that are around the piping.
For information about bundling, see the Bundling page in this section.
For information about using a conduit to protect the wiring between
the outdoor unit and the indoor unit, see the in the Electrical System
Installation section.
38
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 32: Special Applications. (For Illustrative Purposes. Appearance
and Connection Locations Will Differ Depending On Outdoor Unit
Model.)
Outdoor Unit Below Indoor Units
Seal the small access hole
in the wall around the piping.
Outdoor Unit Above Indoor Units
Seal the small access hole
in the wall around the piping.
Drainage from the Indoor Units
-
Drainage from the Indoor Units
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