Chore-Tronics® 2 Control Control Installation
MT1843B
73
Analog Inputs
Analog Inputs consist of temperature sensors, the static pressure sensor, the relative
humidity sensor and potentiometers (natural ventilation only). These inputs can be
wired to any of the analog inputs (AI 1 thru AI 12) on the I/O board. The inputs that
are pre-assigned are temperature sensors 1, 2 and 3, and the static pressure sensor.
Use the diagram located on page 113 to record where each Input is wired to the
Control.
Temperature Sensors
The Temperature Sensors require Non-Shielded 20 Gauge Twisted Pair Wire.
This wire is available through Chore-Time. When routing this wire in the house
be sure to keep it a minimum of 12"(305mm) away from line voltage wiring. If
there is a need for the Sensor wire to cross line voltage wires cross them at a 90°
angle to each other as shown below in Figure 79.
The Temperature Sensor wires can be connected to any one of the Analog Inputs
(AI1 through AI12) of the I/O board. Whatever AI Inputs the Temperature Sensors
are connected to, make sure that the blue jumper above each Input is set to "R" as
shown in Figure 82 below. There are no polarity restrictions for the Temperature
Sensors.
Figure 81. 90° Cross-over
Item Description
1 Non-Shielded Twisted Pair Wire
2 Line Voltage Wiring
90°
U
R
U
R
U
R
U
R
MT1842-089 11/04
AI1
AI2
AI3
AI4
24V
2
1
Item Description
1 Analog Input (A1)
2 blue jumper set to "R"
Figure 82. Temperature Sensor Wiring
Black
Red
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