CBV-2U4-3T(-N) |
Installation Overview
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Subject to change without notice
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Wiring the Universal Inputs
The
CBV-2U4-3T(-N)
comes with 5 universal inputs.
U/I-8
is dedicated to the internal air flow sensor.
U/I-1
through
U/I-4
are used for wiring in room sensors, set point adjust, discharge air sensors, CO
₂
sensors,
relative humidity sensors, and motion sensors, depending on the application. The sequences for this wide
range of applications are available within the preloaded strategy. See
Configuring the CBV-2U4-3T(-N)
of this manual for selecting the sequence for specific applications.
•
U/I - 1
will typically be where the room temperature sensor is wired. This input is pre-configured to
support a 10K Type III thermistor. All room sensors purchased from ABB are 10K Type III.
Note:
Room sensors that short the thermistor for push button occupancy are supported with this controller.
•
U/I
–
2
will typically be where the room set point adjust is wired. This input is pre-configured to support
a 5K
POT
. All room sensors purchased from AAM are of this sensor type.
Note:
It is possible to fine tune the set point adjusts or to change it to support a 10K POT by changing analog
setpoints
SliderValAt_xx
(A385
…
A389 e.g.
) R/W to change the resistance table. See
on page 61 for details on changing these values.
•
U/I
–
3
is a dedicated input that has been configured to read a thermistor. In the pre-loaded strategy
this input is used for a supply air temperature sensor for auto changeover. See
on page 43 for more information on this feature.
•
U/I
–
4
is configured as a voltage input. This input can be used for wiring in a CO
2
sensor, relative
humidity sensor, or a motion sensor (must be a dry contact closure).
Note:
For CO
₂
or relative humidity sensors it must be a 0
…
10 V DC sensor type. To change the span for the CO
₂
sensor that is installed, adjust the following:
o
o
To adjust the span for the relative humidity sensor that is installed, adjust the following:
o
Low range of sensor.
o
Total range of senor.
IO POINTS
DESCRIPTION
UI-01
Zone Temperature (with optional override button)
UI-02
Setpoint Adjustment (optional 5K slider)
UI-03
Discharge Temperature (optional)
UI-04
CO₂
, Humidity, or occupancy signal (all optional)
UI-08
Flowrate Sensor
Summary of Contents for CBV-2U4-3T
Page 1: ... USER GUIDE MAN0139 rev 14 CBV 2U4 3T N ...
Page 75: ......