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ELECTRICAL
Communication Cable Specifications
Communications Cable Connections
When connecting the communications bus between the outdoor unit, indoor unit(s), and heat recovery unit(s), it does not matter what physi-
cal path or route the wire takes. The installer may use discretion when choosing the order the components are connected to the communica-
tions bus, but must maintain the daisy chain and polarity configuration.
1. Remove a knock-out plug from the control box. Remember the communications cable and the power cable must enter the control box
through different knockouts.
2. Field-install a plastic or rubber grommet in the knockout hole to prevent wire chaffing.
3. If using conduit, connect the conduit to the control box using field-provided fittings and industry best-practice procedures.
4. Provide at least three (3) to four (4) inches of slack cable at each indoor unit.
5. Secure the communications cable to the inside surface of the control box using a field provided nylon wire clamp.
6. Strip approximately quarter of an inch of insulation from each communications cable conductor. At each indoor unit, insert the conductors
under the terminal screw.
7. Securely tighten the terminal screws to prevent the communications conductors from coming loose from the terminal block.
8. Secure the communications cable in appropriate locations outside the indoor unit.
Power Wiring and Communications Cable Location
Figure. Location of Power Wiring / Communications Cable Terminals in the Split Rooftop Units.
Economizer (Optional) High Voltage (208/230V)
Fan Motor High Voltage (208/230V)
Wired Remote Controller
Transmission
Recommended Electrical Entry Location
It is recommended by the Manufacturer that electrical service be brought into the unit through the end wall, as shown below. There are three
penetrations into the cabinet that are required. See Figure below.
Figure 42: Electrical Entry in the Split Rooftop Units.
Connections
Power Supply High Voltage (208/230V)
(1Ph, 60Hz, 208/230V, AWG18, 3-wire)
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.
UV Light (Optional)
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