LG MULTI F Engineering Manual page 32

ART COOL MIRROR INDOOR UNITS
Installation and Best Layout Practices
Connecting the Indoor Unit Piping to the Field-Installed Piping
1. Center align the indoor unit piping (refrigerant and drain) and the field-installed
piping, then hand tighten the flare nut.
2. Tighten the flare nut with a torque wrench.
3. Attach the drain tube piping to the indoor unit drain hose as shown.
If the drain hose is routed
inside a room, add insulation
to prevent condensation from
forming.
Insulating the Refrigerant and Drain Piping
Refrigerant Piping Insulation
Field-installed vapor and liquid refrigerant piping lines must be properly and completely cov-
ered in insulation (up to the indoor unit piping connections). Any exposed piping may generate
condensate or will cause burns if touched. Insulation for this field-installed refrigerant piping
must have a minimum heat resistance of 248°F.
Drain Piping Insulation
Drain piping must have insulation a minimum of 7/32 inches thick.
Installing the Insulation
1. Overlap the insulation at the connection of the field-installed piping and the indoor unit
piping. Tape together so that no gaps exist.
2. Secure insulation to the rear piping housing section with vinyl tape.
3. Bundle the piping and drain hose with tape where they meet at the back of the indoor unit
frame. Position the drain hose at the bottom of the bundle (positioning the drain hose at the
top of the bundle may cause the drain pan to overflow inside the indoor unit).
Drain Slope
Drain hose should point down
so water can flow away easily.
Figure 26:Drain Piping Slope.
Slope Down
32 | ART COOL MIRROR
Figure 24:Extending the Drain Hose.
Drain extension
Narrow tape
Adhesive
Checking the Drainage System
1. Pour water on
Figure 27:Checking the Drainage
the indoor unit System.
evaporator.
2. Ensure the water
flows through and
out of the hose
and away from the
indoor unit without
leaking.
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 23:Indoor Unit to Field-Installed Piping Connection.
Indoor unit piping
Indoor unit
drain hose
Torque
wrench
Figure 25:Insulating the Piping.
1.
Field-supplied
piping
Wide tape
2.
3.
Piping
Drain hose
connection
Check for
Drain hose
leaks
Drain pan
Drain
hose
Check for
leaks
F
MULTI
F
MULTI MAX
Flare nut Field-installed
piping
Spanner
Flare nut
Field-installed
piping
Bands
Insulation
Indoor unit
piping
Wrap with tape
Piping
Narrow tape
Wrap with tape
Wide tape