Branch Distribution Unit Installation - LG Tri-Zone Multi F Installation Manual

GENERAL INSTALLATION GUIDELINES
Multi F MAX Branch Distribution Unit Installation
Branch Distribution Unit Orientation
Multi F MAX Branch Distribution (BD) Units can be installed in a multitude of
options to fit various building configurations and job or application requirements.
The installation location of the PCB within the BD unit can be changed for easier
service access, depending on the BD unit installation itself (see the wiring section
for information). Multi F MAX BD Units include electronic expansion valves that
properly seat only if the BD Unit is installed in an acceptable orientation. Installa-
tions with improper BD Unit orientation risk incomplete valve seating and system
performance degradation from potential refrigerant leakage through the electronic
expansion valve.
Ceiling Mount Installation - Hangers with
Hanging Bolt
1. Drill four (4) holes in the ceiling, following the dimensions on the previous page.
2. Attach the factory-supplied hangers with two (2) screws each at the designated four
(4) areas on the frame of the BD unit.
3. Install an anchor in the ceiling, and attach the hanging bolts to the ceiling.
4. Add nuts and washers to the hanging bolt as shown at right.
5. Hang the BD unit on the hanging bolts (ceiling side up), and after checking for level
(±5 degrees), securely tighten all nuts.
Ceiling Mount Installation - Hangers Only
1. Attach the factory-supplied hangers with two (2) screws each at the designated four
(4) areas on the frame of the BD unit.
2. Install the BD unit to the ceiling using two screws on each of the hangers as shown
below. Unit should be ±5 degrees of level.
3. Cover parts of the hanger holes with polyethylene foam insulation (to prevent con-
densation).
If a screw has been installed on the frame of the BD unit and the screw has been removed, to prevent condensation, either re-install the
screw or cover the open hole with aluminum tape.
Figure 10: Acceptable BD Unit Ceiling Mount Orientations.
Ceiling Mounting Options
Ceiling
Top of Unit
Right Side View,
Port End Facing Right
22
Ceiling
Top of Unit
Left Side View,
Port End View
Port End Facing Left
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.
Ceiling Ceiling
Top of Unit Top of Unit
Refrigerant Piping End View
MULTI
MULTI
This material is for informational or educational
purposes only. It is not intended to be a substitute
for professional advice. Consult with your engineer
your system.
Figure 11: BD Ceiling Mount Installation.
BD unit
Nu t Nu t
(M10 or M8 (M10 or M8)
Flat washer Flat washer
Hanging bol t Hanging bolt
(M10 or M8)
Isometric View
Into the Unit
Into the Ceiling
Into the Ceiling
F
F
MAX
Into the Unit
Into the Unit
Into the Ceiling