Optional Wall-Mounted Controller And Sensor - LG MULTI F Installation Manual

WIRING

Optional Wall-Mounted Controller and Sensor

Wired Controller Installation
Ceiling cassette indoor units can be used with various wired controllers (optional; sold separately). Wired controllers include a sensor to
detect room temperature. To maintain comfort levels in the conditioned space, the wired controller must be installed in a location away from
direct sunlight, high humidity, and where it could be directly exposed to cold air. Controller must be installed four (4) to five (5) feet above the
floor where its display can be read easily, in an area with good air circulation, and where it can detect an average room temperature.
Do not install the remote controller where it can be impacted by the following:
• Drafts or dead spots behind doors and in corners
• Hot or cold air from ducts
• Radiant heat from sun or appliances
• Concealed pipes and chimneys
• Uncontrolled areas such as an outside wall behind the remote controller
1. Pull communications cable between the controller handy box (if used) and the indoor
unit (field supplied).
2. Store a minimal amount of cable in the handy box. Any additional cable must be coiled
and stored near the indoor unit control panel.
3. If additional cable length is needed, communication cable from the indoor unit to the
remote controller(s) is to be 22 AWG, 3-conductor, twisted, stranded, unshielded. Wir-
ing must comply with all applicable local and national codes. If using the LG Controller
/ Extension cable and the length needs to be further extended, the LG Extension Kit (sold separately) must be used. A maximum of four
(4) kits (up to 165 feet) can be used.
4. If the cable between a zone controller and the indoor unit is too long,
and leave it next to the indoor unit location.
Assigning the Thermistor for Temperature Detection
Each indoor unit includes a return air thermistor assigned to sense the temperature. If a wired controller is installed, there is a choice of sens-
ing temperature with either the indoor unit return air thermistor or the thermistor in the wired controller. It is also an option to set both thermis-
tors to sense temperature so that indoor unit bases its operation on the first thermistor to reach the designated temperature differential.
An optional Remote Temperature Sensor can be used in lieu of the return air thermistor—either alone or in conjunction with a wired controller
thermistor.
Wall-Mounted Sensor Installation
Proper indoor unit operation depends on the location of the room sensor, if a room sensor is installed in addition to, or to use in place of a
controller. A good location will protect the sensor from direct sunlight and external local sources of water vapor, and air flow. If no mounting
height was specified by the building designer, place the handy box approximately four (4) to five (5) feet above the finished floor.
• It could be necessary to use a handy box that is sized in metric units, depending on the sensor model. Check with your LG representative
to verify which size of handy box is needed for the sensor in question.
• Communication cable from the indoor unit to the controller(s) is to be 22 AWG, 3-conductor, twisted, stranded, unshielded. Wiring must
comply with all applicable local and national codes. If using the LG Controller / Extension cable and the length needs to be further extend-
ed, the LG Extension Kit (sold separately) must be used. A maximum of four (4) kits (up to 165 feet) can be used.
• Maintain at least the minimum distance required between the communications cable and power wiring. The minimum required space be-
tween the two depends on the voltage of the power wiring.
• Do not route power wiring and communications cables in the same conduit. Routing power wiring and communications cables together
will cause communication errors and unit malfunction.
• Do not cut the quick-connect plugs off or adjust the length of the cable. Keep the communications cable away from high voltage wires
and electromagnetic field (EMF) producing equipment. Performing these actions will cause communication errors and unit malfunction.
44
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 63: Proper Location for the Wired Controller.
TEMP
roller Cont
Rem ot e
NO
do not cut. Coil any spare communications cable, tie-wrap it,
F
MULTI
F
MULTI MAX
YES
TEMP
Remote Controlle r
NO TEMP
Remote Controlle r
NO
4 to 5 feet
above the floor