CaptiveAire RTULink, Installation, Operation And Maintenance Manual

Page: 47 / 56

47
COMPONENT DESCRIPTION
Temperature Sensor
– Wall Mount
A wall mount thermistor may be used to monitor a space temperature.
The thermistor is a Type II 10kΩ thermistor that provides a constant
space temperature reading to the control board. It should be installed
on a junction box, which should be mounted in a space that gives an
accurate reading. Avoid spaces close to appliances, direct sunlight, or
drafts from doors or foot traffic. Space temperature sensors are
available with a plastic housing or a stainless steel housing.
Current Sensor
Current transducers can be utilized to estimate energy usage or
detect a faulty component. A current sensor has a solid core and
provides a 0-10VDC analog output that is proportional to the current
measured. There are two versions, one with an adjustable range of
0-10 amp, 0-20 amp or 0-50 amp, and one with an adjustable range
of 0-100 amp, 0-200 amp, or 0-250 amp. The measurable range is
based on the position of the jumper on the top of sensor: L, M or H
respectively. The range selected should be the smallest range
possible that includes the FLA of the component being monitored.
Temperature and Humidity Sensor
– Wall Mount
One or several wall-mounted temperature and humidity sensors can be
utilized. The sensor has a Type II 10kΩ thermistor and a circuit board
that houses the humidity sensor and outputs its 0-10VDC signal. The
sensor has a bank of dip switches on the circuit board that control the
range of the output signal. Dip switches 7 and 8 need to be switched to
ON and the rest need to be left off in order for the sensor to output 0-
10VDC. To access the circuit board on the stainless steel sensor,
remove the sensor from its junction box. In order to access the circuit
board on the plastic sensor, remove the sensor housing by backing out
the housing screws with a
1/16” Allen key.