Table of Contents
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START-UP
Use the Carrier network communication software to start up
and configure the bypass coil controller.
All set-up and set point configurations are factory-set and
field-adjustable.
Changes can be made using the System Pilot or Carrier
software. During start-up, the System Pilot or Carrier software
can also be used to verify communication with the bypass
controller.
For specific operating instructions, refer to the literature
provided with the System Pilot or Carrier software.
Perform System Checkout —
tem, perform the following:
1. Apply 24 vac power to the bypass controller.
2. Using the System Pilot, upload the controller from
address 0,141 (default address). The address may be set at
this time. The address should be set to 1 higher than the
monitor or the linkage coordinator.
3. Access the bypass controller commissioning and mainte-
nance tables.
4. If the terminal damper closes in the clockwise direction,
then no adjustment is required. If the terminal damper
opens in the clockwise direction, set the CW Rotation
point to OPEN.
5. Force the Bypass Commis point to Enable.
6. Force the Damper Calibration point to Enable. The auto-
matic bypass damper calibration process will begin. The
bypass controller will verify that the air source fan is off.
Communication with the linkage coordinator is required.
Make sure the linkage coordinator and the Bypass
Controller are addressed correctly.
NOTE: If the Bypass Controller is in local mode (stand
alone), the user must make sure the duct static pressure is
0 to enable damper calibration.
If the fan is turned on, the Damper Calibration process
will be aborted. The bypass damper will travel to its min-
imum and maximum positions. The damper positions
will be saved and used by the bypass controller. When the
damper calibration process is complete, the bypass con-
troller will automatically return the point to Disable.
7. Force the Zero Pressure Sensor Cal point to Enable. The
bypass controller verify that the air source fan is off. If the
fan is turned on, the Zero Pressure Sensor Calibration
process will be aborted. The bypass controller will auto-
matically calibrate the zero value of the pressure sensor.
When the calibration process is complete, the bypass con-
troller will automatically return the point to Disable.
8. Set up all zone controllers and perform system commis-
sioning at the linkage coordinator before adjusting the
System Pressure Set Point.
9. Adjust the System Pressure Set Point by forcing the point
to the desired value. The bypass controller will write the
forced value to the set point table and will begin to con-
trol to the new bypass pressure set point.
10. Read the airflow with a measuring device. If the reading
varies from the screen value, force the value to the mea-
sured value. Once the pressure sensor is forced, the control-
ler will automatically calibrate the pressure sensor (as long
as the bypass damper is not >95% open). Repeat as needed.
DESCRIPTION
System Mode
Damper Position
System Pressure Setpt
System Pressure
Duct Temperature
To check out the sys-
Table 5 — Status Display
VALUE
UNITS
BPCOMMIS
0
%OPEN
1.50
in H2O
0.00
in H2O
73.8
dF
12
CONFIGURATION
The following sections describe the computer configuration
screens which are used to configure the bypass controller. The
screens shown may be displayed differently when using differ-
ent Carrier software.
Status Display Table —
to show status of different functions of the bypass controller.
The values displayed in this table are read-only values. See
Table 5.
SYSTEM MODE — The System Mode variable displays the
Linkage Coordinator zone controller's system mode as the by-
pass controller's system mode except when the bypass control-
ler is in its commissioning mode or the network communica-
tion fails. In bypass commissioning mode, the system mode
will display BPCOMMIS to indicate the bypass controller is in
its own commissioning mode. If the network communication
between the bypass controller and the linkage coordinator fails,
the system mode will display LOCAL.
System Mode:
Display Units
Display Range
Network Access Read only
DAMPER POSITION — This variable displays the damper
position percent range of rotation determined by the damper
feedback potentiometer. The bypass controller is designed for
use on dampers with a range of rotation up to 90 degrees.
Damper
Position:
Display Units
Display Range
Network Access
SYSTEM PRESSURE SETPT — This variable displays the
supply air static pressure set point that is to be maintained by
the bypass controller. The bypass controller determines the
damper position by comparing the system static pressure to this
set point.
System Pressure
Setpoint:
Display Units
Display Range
Network Access
SYSTEM PRESSURE — This variable displays the static
system pressure through an integrated pressure sensor in incre-
ments of 0.1 in. wg.
System Pressure: Display Units
Display Range
Network Access
DUCT TEMPERATURE — This variable displays the duct
temperature at the bypass damper through a 10K thermistor
with a measurement range from –40 to 245 F in 0.1º F
increments.
Duct
Temperature:
Display Units
Display Range
Network Access
STATUS
FORCE
Comm failure
Comm failure
Comm failure
Comm failure
Comm failure
The status display table is used
ASCII
HEATING, COOLING,
FREE COOL,
PRESSURE, EVAC,
ZONE_BAL, OFF,
BPCOMMIS, LOCAL
% open
0 to 100
Read only
in. wg
0.10 to 1.80
Read only
in. wg
0.00 to 2.00
Read only
F (C)
–40.0 to 245.0
Read/Write
NAME
SYS_MODE
DMP_POS
SP_SETPT
SP_SENSR
DUCT_TMP
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