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Field-Mounted Sensors
WARNING
Do not use a single, multi-conductor cable to wire both the
space temperature and humidity sensors. Use separate
communication cables for each sensor. Incorrect wiring may
result in communication problems or failure to operate at all
All field-mounted sensors are designed to be connected
to the terminal strip. All sensors and end devices for the
product have been factory wired with the exception of
the following items:
Table 10: Field Mounted Sensor
Sensor Type
Mounting Location
Supply Temperature
Supply Duct
Supply Humidity
Supply Duct
Space Temperature
Wall Mounted in Space
Space Humidity
Wall Mounted in Space
Space CO
2
Wall Mounted in Space
Differential Pressure
In the DOAS Unit (for EA CFM)
Smoke Detector
Return Duct
Special control sequences are required field-mounted sensors
(e.g. Space Reset Control, CO
2
Control).
Space temperature and Humidity Sensor
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 ventilator at a
height of approximately five (5) feet from the floor. Two
(2) individual sensors are 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, 18AWG, 2 or 3
conductor, twisted, stranded. Terminations must be
made per the following chart.
Table 11: Space Temperature Sensor Terminations
Space Temperature Sensor
Type #1
NTC 10k
Terminal Strip TB
@ NTC Module
RI1
G
Type #2
0~10Vdc
Terminal Strip TB
@UI Module
UI5
G
Sensor setting
LG recommend
- Space Temperature Sensor (NTC):
MAMAC (ST-203-EX12
)
- Space Humidity Sensor (0~10Vdc):
MAMAC (HU-225)
If the 0~10Vdc type of Temperature sensor is installed, it needs
a setting on the controller.
Check the upper and lower limits of the sensing range. In order
to display the correct temperature value, the upper and lower
limit values of the range must be set by controller. Please 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 Setting
Main Menu > Ctrl Variable > Sensor Settings
Change sensor status to
“Installed”
- Set Min / Max Value refer Sensor manufacturer Data Sheet
Figure 17: Space temperature sensor connection (NTC)
Table 12: Space Humidity Sensor Terminations and setting
Space Humidity Sensor
Type
0~10Vdc
Terminal Strip TB
@ UI Module
UI6
G
Figure 19: Space humidity sensor connection (0~10Vdc)
