Field-Mounted Sensors - LG ARND DCR4 Series Installation Manual

ELECTRICAL INFORMATION

Field-Mounted Sensors

Field-Mounted Sensors
All field-mounted sensors are designed to be connected to the
DOAS terminal strip. All sensors and end devices for the unit have
been factory-wired with the exception of the following items listed.
(Example: Space Reset Control, CO
Space Temperature and Humidity Sensors
When a unit is designed with space temperature and humidity reset, both a wall-mounted temperature sensor and a wall-mounted humidity
sensor need to be purchased and installed at the field. Both sensors must be mounted in the space served by the DOAS unit at a height of
approximately five (5) feet from the floor. Two (2) individual sensors are field-provided to prevent interference, but the individual enclosures
may be installed on a wall immediately next to each another. Wiring between the unit and the temperature sensor must be through a field-
supplied, 20 AWG, two or three conductor, twisted, stranded. Terminations must be made per the charts below and on the next page.
Table 26: Space Temperature Sensor Terminations.
Space Temperature Sensor
Type No. 1
Terminal Strip TB @ NTC Module
Type No. 2
Terminal Strip TB @UI Module
Sensor Settings:
LG recommends NTC type sensors:
• Space Temperature Sensor (NTC): MAMAC
• Space Humidity Sensor (0~10Vdc): MAMAC (HU2253VDC)
If the 0~10Vdc type of sensor is installed, it needs a setting on the controller.
(MAMAC SYSTEMS is a registered trademark of MAMAC SYSTEMS, INC.)
Check the maximum and minimum of the sensing range. To display the correct temperature value, the
maximum and minimum limit values of the range must be set by controller. Refer the Sequence Manual
for "Sensor Settings".
SVC manager account login:
Main Menu > Ctrl Variable > Advanced > Login and input password '7600' for Service account login.
Sensor Settings:
Main Menu > Ctrl Variable > Sensor Settings. Change sensor status to "Installed"
Set Min. / Max. Value: Refer to the sensor manufacturer datasheet.
38
Control).
2
NTC 10k
RI1
G
0~10Vdc
UI5
G
® (ST-203-EX120)
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.
Table 25: Field-Mounted Sensors.
Sensor Type
Space Temperature Wall Mounted in the Conditioned Space
Space Humidity Wall Mounted in the Conditioned Space
Space CO Wall Mounted in the Conditioned Space
2
Figure 31: Space Temperature Sensor Connection (NTC).
Mounting Location