LG MULTI F Engineering Manual page 122

DUCT (HIGH STATIC) INDOOR UNITS
Installation and Best Layout Practices
Preparing the Installation Area and Hanging the Indoor Unit Frame
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
should be at least 13/32 inches in diameter), and then insert the
bolts into the installation area.
Figure 164: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.
• Unit must be installed correctly.
• Tighten the nuts and bolts to prevent the unit from falling.
Installing the Drain System
• Drain piping must have downward gradient of at least 1/50 to 1/100; to prevent reverse flow, slope
should 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.
Figure 168:Drain Piping Installation Dimensions.
Do not apply force or twist the drain hose, it may leak.
122 | DUCT (HIGH STATIC)
Figure 165:Suspension Bolt Options.
Hanger distance
Maximum
11-13/16 inches
Hanger Bracket
3.3~49.2 feet
1/50~1/100 slope
Metal
clamp
Flexible drain hose
Insulation
Due to our policy of continuous product innovation, some specifications may change without notification.
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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.
Figure 166:Hanging the Indoor Unit.
F
MULTI
F
MULTI MAX
M10 Nut X 4
(Field-
M10 SP. washer X 4
supplied)
M10 washer X 4
M10 washer X 4
(Field-
M10 SP. washer X 4
supplied)
M10 Nut X 4
Figure 167:Indoor Unit Drain Piping.
Drain Pipe Support
Indoor unit
Drain Port
Maintenance
1/50~1/100mm
Maximum
27-9/16 inches