Page 14
CONNECTING THE TEMPERATURE SENSORS
The BASYX VAV / VVR provides predetermined analog and digital inputs for variable air volume terminal control.
Please refer to the TYPICAL VAV INSTALLATION DRAWING at the end of this document for details on complete
wiring of the VAV / VVR controller inputs and outputs.
Use 1 pair, shielded plenum cable for all input and output wiring. This cable should be 18 AWG, and should consist of
a stranded, twisted-pair, shielded cable with less than 20 pF capacitance per foot.
NOTE:
Connect all sensor and output cable drain wires to earth ground.
CAUTION:
Do not run sensor or output wires near power cables or in power
conduits. Isolate all sensor and output wires from large contactors
or motors, fluorescent light fixtures and other sources of high
intensity electromagnetic interference (EMI).
SENSOR INPUT DESIGNATIONS
The VAV / VVR analog inputs are thermistor type II only, with inputs dedicated as follows:
Analog Input 1: Space temperature sensor
Analog Input 2: Entering supply air temperature sensor
Analog Input 3: Setpoint adjustment slidebar
Analog input 1 is dedicated for space temperature, and is used for temperature control of the conditioned space, and
is used for air flow calculation reset.
Analog input 2 is dedicated to supply air temperature from the corresponding air handling unit. This is used for
reversing of damper logic on high supply temperature (morning warmup, etc.), and makes the box a variable air
volume heating device based on the adjustable setpoint.
Analog input 3 is the setpoint adjustment slidebar on the ACI/10K-CP-R series room sensor if selected. This is a 0-
400 ohm resistance input and will automatically adjust the normal space setpoint by +/- 2 degrees.
