CBV-2U4-3T(-N) |
CBV-2U4-3T(-N) Control Sequences
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Subject to change without notice
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36
M
AN0
13
9
re
v
14
VAV ONE TO THREE STAGE ELECTRIC REHEAT VARIABLE SPEED FAN
TEMPERATURE CONTROL
When the zone temperature is greater than, or equal to, the cooling temperature setpoint, the controller will
enter the cooling mode. The primary air flow rate will be varied between its
deadband setpoint, and its maximum Flowrate setpoint
(A211) as required to maintain
the zone at the cooling temperature setpoint.
When the zone temperature falls to the heating setpoint, the controller will enter the heating mode and the
primary air flow rate will be varied between its
(A212), or maximum heating Flowrate setpoint. The stages of electric heat are then staged and optionally
duty-cycled (PWM), as required to maintain the zone at the heating temperature setpoint.
FAN CONTROL
Parallel Variable Fan Speed Option
The variable fan speed will be controlled by modulating
AO 15
(default 0
…
10 Vdc). The fan will run in heating
mode only. As more heating is required, the fan speed will increase. See
on page 58 for more
detail.
Series Variable Fan Speed Option
The variable fan speed will be controlled by modulating
AO-15
(default 0
…
10 Vdc). In deadband mode, the
fan will run at a slower speed. As more heating or cooling is required, the fan speed will increase. See
Input / Output Points
VAV Electric Reheat with variable speed fan
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
CO
2
, Humidity, or occupancy signal (all optional)
UI-08
Flowrate Sensor
DO-09
Damper Control (CBV-2U4-3T-N only)
DO-10
Damper Control (CBV-2U4-3T-N only)
DO-11
Electric Heat1
DO-12
Electric Heat2 (optional)
DO-13
Electric Heat3 (optional)
AO-14
AO-15
Variable Speed Parallel or Series Fan Speed Command (0
…
10 Vdc)
AO-16
Damper Control
(
CBV-2U4-3T
only)
Summary of Contents for CBV-2U4-3T
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