Table of Contents
Advertisement
VENT MODE
In the DEADBAND mode, the unit is neither calling for heating or cooling during an OCCUPIED state. The
zone temperature will be between the
modulate to maintain the
in Section 3.
SETPOINT MODIFIERS
The Occupied setpoints can be modified in several different ways.
Auto.
•
Slider Offset
If a generic Zone Temperature sensor is wired to UI1, UI2 can be setup to take a 0-5k
o
potentiometer. The slider is enabled when binary setpoint
The analog setpoint
temperature range an end-user can set the sensor.
▪
•
Standby Offset
If the unit is scheduled OCCUPIED and has an occupancy sensor on an input. When no
o
occupancy is detected by the occupancy sensor after a set time, the occupied setpoints
will offset to their standby setpoints, determined by the
setpoint.
▪
•
Shed Offset
If a value from 1-100% is sent to the
o
heating setpoints will reset from their occupied setpoints to their standby setpoints on a
sliding scale.
▪
CBT STAT
Note:
CBT-STAT cannot be used to balance a VAV box.
If a
CBT-STAT
has been wired to the unit, the heating and cooling setpoints will be sent down to the
STAT
display. The
strategy
from the
CBT-STAT
CBT-STAT, overriding any user adjustment for that period. Users can adjust the setpoints during
occupied and unoccupied periods.
The
CBTStatStptEnable (D164)
stat. If the unit is in
©ABB 2021 All Rights Reserved.
Subject to change without notice
WWW.CYLON.COM
activeHeatStpt (A188)
minCoolFlowStpt (A227).
SliderSpanStpt (A138)
For example, if
SliderSpanStpt (A138)
change for the heating and cooling setpoints. Let us say the occupied cooling
setpoint (is 72F (22C) and the heating setpoint is 70F(20C). When UI2 value is 0
ohms, the
activeCoolStpt (A187)
down, so the
activeCoolStpt (A187)
(A188)
will change to 68F(18C). When the UI2 value is 5k ohms, the occupied
activeCoolStpt (A187)
and
the
activeCoolStpt (A187)
will change to 72(22C).
For example, let us say the
setpoint is 72F(22C) and the heating setpoint is 70(20C). When no occupancy is
detected by the occupancy sensor, the
deg and change to 75F(25C). The
change to 67F(17C). Once there is occupancy detected, the cooling and heating
setpoints will revert to their occupied setpoints.
For example, at 50% shed, and the
activeHeatStpt (A188)
was 70F(20C), the new values will be 73.5F(23.5C) for
activeCoolStpt
(A187), and 68.5F(18.5C) for the
the cooling and heating setpoints will be equal to their standby setpoints.
will automatically detect if the
and not
. On any mode change, the calculated setpoints will be sent down to the
UI1
digital setpoint can be used to lock out the ability of users to adjust the
Shed
Mode, the
CBT-STAT
FBVi-2U4-4T |
and
activeCoolStpt (A187).
If the unit includes a fan, see the Fan Control section
HVACModeCmd (A287)
SliderEnable (D95)
value will determine the upper and lower
is set to 4, that will allow a +2 to -2 range
and
activeHeatStpt (A188)
will change to 70F(20C), and
activeHeatStpt (A188)
will offset 2 degrees up. Then
will change to 74(24C), and the
standbyOffset (A146)
standbyOffset (A146)
is set to 3 deg, and the cooling
activeCoolStpt (A187)
activeHeatStpt (A188)
netShedCmd (A310)
analog point, the cooling and
activeCoolStpt (A187)
activeHeatStpt
CBT-STAT
is present and use zone temperature
will also be locked out.
Control Sequence
The damper will
must be in
is set to On.
will offset 2 degrees
activeHeatStpt
activeHeatStpt (A188)
analog
will change by +3
will change by -3 deg and
was 72F(22C), and
(A188). At 100%,
CBT-
85
Advertisement
Table of Contents
