LG MULTI F Installation Manual page 72
Multi-zone heat pump systems
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- Engineering manual (224 pages) ,
- Installation manual (65 pages) ,
- Install (9 pages)
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ELECTRICAL
Distributor Unit (Multi F MAX Systems Only)
General Instructions
• Always connect power wiring / communications cable matching the
branch distribution unit terminals to their respective indoor units
(Example for three-port branch distribution unit PMBD3630: A, B,
and C).
• Follow the instructions on the nameplates and connect wiring /
cables of the outdoor unit and indoor units to the correct terminals.
Always attach each ground wire separately to a grounding screw.
• After completion, secure wiring with wire clamps. Secure wiring
firmly to the indoor unit.
Branch Distribution Unit Wiring Connection Procedure
1. Remove the branch distribution unit control cover. Unscrew the two (2) screws, and slide the cover off the branch distribution frame follow-
ing the arrows in the diagram (Step 1).
2. Draw the communications / connection (power) cable from the outdoor unit so there is enough length to connect to the terminals on the
branch distribution unit. Secure a field -supplied conduit to the branch distribution unit using a field-supplied lock nut on the interior of the
branch distribution unit frame (Step 2). Pull the communication / connection (power) cable through the conduit into the branch distribution
unit.
3. Connect communications / connection (power) cable from the outdoor unit to the branch distribution unit terminals, and from the branch
distribution unit terminals to the indoor unit terminals following the wiring diagram on the outdoor unit control cover (Step 3). Allow 11-
13/16 inches of slack in the wire harness. Attach communications / connection (power) cable to the branch distribution unit with clamps at
four (4) locations.
4. Replace the branch distribution unit control cover following the arrows in the diagram. Tighten the two (2) screws to finish (Step 4).
Figure 91: Branch Distribution Unit Wiring Steps.
Step 1
cal injury or death.
Always refer to the circuit diagram on the inside of the outdoor unit control cover.
72
Step 2
Conduit (field supplied)
Lock nut (field supplied)
Lock nut (field supply)
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 90: Interior View of a Branch Distribution Unit (Three-Port
PMBD3630 Example Shown).
"A" Room
"B" Room
"C" Room
Connection Wire to Indoor Units
Step 3
A
B
C
CN-PWR
Connection Wire from Outdoor Unit
Step 4
physi-
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