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MULTI
F
MAX
MULTI
F
1. Select and mark the area for the suspension or console bolts (use
embedded inserts or anchor bolts in new buildings, and hole-in-
anchors in older buildings).
2. Drill the holes.
3. Add the set-anchor and the plate washer to the bolts (bolts must
be at least 13/32 inches in diameter), and then insert the bolts
into the installation area.
4. Add the plate washer, spring washer, and nut to secure the bolts
into the installation area.
5. Position the indoor unit installation plates onto the bolts. Secure
using nuts, plate washers, and spring washers. Adjust for level as
necessary.
• Unit must be installed correctly. Tighten the nuts and bolts to prevent the unit from falling and
causing severe injury or death.
Figure 161: Preparing the Installation Area.
Install a canvas duct to the air outlet and air inlet so that vibration from the indoor unit does not
carry to the duct or ceiling. Also, add insulation to the interior of the duct, and apply anti-vibration
to the suspension bolts.
Preparing the Installation Area and Hanging the Indoor Unit Frame
Figure 162: Suspension Bolt Options.
Figure 163: Hanging the Indoor Unit.
M10 Nut
M10 SP. washer
M10 washer
X 4
X 4
(Field-
supplied)
X 4
M10 Nut
M10 SP. washer
M10 washer
X 4
X 4
X 4
(Field-
supplied)
Do not apply force or twist the drain hose: it will leak.
1/50~1/100 slope
Hanger distance
3.3~49.2 feet
Hanger Bracket
Maximum
27-9/16 inches
Flexible drain hose
Insulation
Metal
clamp
Maximum
11-13/16 inches
Installing the Drain System
• Drain piping must have downward gradient of at least 1/50 to 1/100; to prevent reverse flow, slope must
not be straight up and down.
• Do not damage the drain port on the indoor unit when connecting the field-supplied drain piping.
• Drain piping specifications:
- Indoor Unit Drain Connection: 1-1/4 inch outside diameter.
- Field-Supplied Drain Piping: Polyvinyl chloride piping with 1-inch inside diameter and pipe fittings.
Drain Port
Maintenance
Drain Pipe Support
Indoor unit
1/50~1/100mm
Maximum
27-9/16 inches
Figure 164:Indoor Unit Drain Piping.
Figure 165:Drain Piping Installation Dimensions.
Installation and Best Layout Practices
DUCT (HIGH STATIC) INDOOR UNITS
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
128 | DUCT (HIGH STATIC)
Multi F and Multi F MAX Indoor Unit Engineering Manual
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