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16

Alarm Routing Control — This decision indicates which
Carrier system software or devices will receive and process
alarms sent by the zone controller. This decision consists of
eight digits each can be set to zero or one. A setting of 1 indi-
cates alarms should be sent to this device. A setting of zero
disables alarm processing for that device. Currently the
corresponding digits are configured for the following devices:
first digit - user interface software; second digit - autodial
gateway or Telink; fourth digit - alarm printer interface
module/DataLINK/BAClink/Carrier Translator; digits 3, and 5
through 8 - unused.
Alarm Routing
Control:

Range

00000000 to 11111111

Default Value

00000000

Re-Alarm Time — This decision is used to configure the num-
ber of minutes the zone controller will wait before an alarm
condition which has not been corrected will be re-transmitted
on the communications network. Re-alarming of an alarm con-
dition will continue until the condition no longer exists.
Alarm Re-Alarm
Time:

Units

Minutes

Range

0 to 1440

Default Value

0 (Disabled)

BYPASS CONTROLLER CONFIGURATION (BP_SERV)
TABLE — The bypass controller configuration table contains
decisions used to configure the damper modulation and the
LAT (leaving air temperature) protection decisions. The bypass
controller can also be configured as a broadcast acknowledger.
See Table 10.
Damper Control Deadband — This decision is used to config-
ure a deadband for bypass damper position control. This algo-
rithm operates based on the pressure sensor input to achieve the
desired set point. In the algorithm, an error signal is defined as
the difference between the system pressure set point and the
pressure sensor input. The deadband is multiplied by a fixed
value of 0.05 to adjust the reaction of the damper algorithm.
The size of the deadband will correspond to the gain of the
loop. The smaller the deadband, the higher the gain and the
faster the loop will react. The larger the deadband, the lower
the gain and the slower the loop will react.
NOTE: If the Damper Control Deadband value is set too low,
excessive actuator movement and wear may occur.
Damper Control
Deadband:

Range

2 to 10

Default Value

5

CW Rotation — This decision is used to configure the rotation
of the bypass damper. If the decision is set to close, the bypass
controller modulates the damper counterclockwise to the open
position. If the decision is set to open, the bypass controller
modulates the damper clockwise to the open position.
CW Rotation:

Range

Open/Close

Default Value

Close

Max Damper Alarm Limit — This decision is used to gener-
ate alarms during system heating and cooling modes. When the

bypass damper position is greater than this configured limit and
the duct temperature meets required conditions, an alarm will
be generated.

During the heating mode if the duct temperature is greater

than the Heating LAT Limit plus 10° F for more than 2 minutes
then a Low Heating Airflow Pressure Alarm will be generated.

During the cooling mode if the duct temperature is

lower than the Cooling LAT Limit minus 2° F for more than
2 minutes then a Low Cooling Airflow Pressure Alarm will be
generated.

The damper position configured in this decision is also used

when the associated master zone controller has not determined
its system mode and the system fan is deenergized.
Max Damper
Alarm Limit:

Range

20 to 99%

Default Value

99%

LAT Pressure Delta — This decision is used to configure the
amount by which the System Pressure Setpt will be increased if
the duct temperature goes above the Heat LAT Limit or below
the Cool LAT Limit. This will cause the amount of bypassed
air to be reduced, protecting the air source from receiving air
that is too hot or too cool.
LAT Pressure
Delta:

Display Units

in. wg

Default Value

0.0

Display Range

0.0 to 1.0

Heat LAT Limit — This decision is used to configure the heat-
ing limit used to provide LAT protection to control the system
airflow based on the duct temperature. If the duct temperature
goes above this limit, the System Pressure Setpt will be in-
creased by the amount configured in LAT Pressure Delta.
Heat LAT
Limit:

Display Units

F

Default Value

120.0

Display Range

80.0 to 120.0

Cool LAT Limit — This decision is used to configure the
cooling limit used to provide LAT protection to control the sys-
tem airflow based on the duct temperature. If the duct tempera-
ture goes below this limit, the System Pressure Setpt will be in-
creased by the amount configured in LAT Pressure Delta.
Cool LAT
Limit:

Display Units

F

Default Value

50.0

Display Range

35.0 to 70.0

Broadcast Acknowledger — This decision is used if the
bypass controller will be used to acknowledge broadcast
messages on the Carrier Proprietary Network bus. One broad-
cast acknowledger is required per bus, including secondary
busses created by the use of a bridge.
Broadcast
Acknowledger:

Range

No/Yes

Default Value

No

Table 10 — Bypass Controller Configuration

DESCRIPTION

VALUE

UNITS

NAME

Damper Modulation

Damp Control Deadband

5

DEADBAND

CW Rotation

Close

DMP_DIR

Max Damper Alarm Limit

99

%OPEN

DMP_LMT

LAT Protection

LAT Pressure Delta

0.0

in H2O

DELTA_SP

Heat LAT Limit

120.0

dF

LAT_HLIM

Cool LAT Limit

50.0

dF

LAT_LLIM

Broadcast Acknowledger

No

BCST_ACK

Содержание VVT 33ZC

Страница 1: ...oordinate up to 31 additional zone controllers The purpose of the Linkage Coordinator zone relationship is to provide an efficient data path for communica tion between the zone controllers bypass cont...

Страница 2: ...ding the damper shaft through the actuator clamp assembly See Fig 2 for details Remove the controller wiring access cover Secure the controller by installing the screw provided through the grommet in...

Страница 3: ...3 Fig 2 Bypass Controller Dimensions Fig 1 Bypass Controller Details...

Страница 4: ...ENSOR 1 6 J5 3 1 G CCN 3 3 G 1 1 5 1 6 1 J4 1 2 NOT USED NOT USED NOT USED DAT NOT USED NOT USED NOT USED NOT USED DAT TO COMMUNICATION BUS TO FEEDBACK POTENTIOMETER LINE VOLTAGE EQUIPMENT GROUND TO D...

Страница 5: ...p the grommet into the hole until it is secure Pull on the leads of the duct sensor until the sensor is snug against the grommet 3 Connect the sensor leads to the bypass controller s termi nal board a...

Страница 6: ...reverse rotation the actuator switch may be changed to the CCW position LINKED ACTUATORS Field supplied linked actuators may be used to link to the bypass controller actuator Install the actuators pe...

Страница 7: ...7 Fig 7 High Torque Actuator Wiring...

Страница 8: ...8 Fig 8 High Torque Actuator with Linked Dampers Wiring...

Страница 9: ...9 Fig 9 Field Supplied Linked Damper Wiring...

Страница 10: ...10 Fig 10 Multiple Field Supplied Linked Damper Wiring...

Страница 11: ...s cable a color code system for the entire network is recommended to simplify installation and checkout See Table 4 for the recommended color code Table 4 Color Code Recommendations 3 Connect the othe...

Страница 12: ...ew 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 contr...

Страница 13: ...iable displays whether the leaving air temperature exceeds the heating or cooling limit configured in the Bypass Controller Service Configuration Table If Yes is displayed the System Pressure Set Poin...

Страница 14: ...zone controller to turn the system fan off If the communication fails the damper calibration process will be terminated and this decision will be Disabled When the fan is off the zone controller will...

Страница 15: ...NT Duct Temperature This variable displays the duct tempera ture at the bypass damper through a 10K thermistor with a measurement range from 40 to 245 F in 0 1 F increments Duct Temperature Display Un...

Страница 16: ...efault Value Close Max Damper Alarm Limit This decision is used to gener ate alarms during system heating and cooling modes When the bypass damper position is greater than this configured limit and th...

Страница 17: ...ease to within the zero tolerance 1 0 0 1 vdc of the sensor The alarm is disabled if this decision is set to Disable Press Sensr Cal Alarm Default Value Enable Display Range Enable Disable Duct Temp C...

Страница 18: ...is off When the fan is off the bypass controller will drive its damper to the fully closed position The bypass controller will read the value of the actuator s feedback potentiometer until the value...

Страница 19: ...l terminate the calibration Once at the fully open damper position the bypass controller will read the output voltage of the pressure sensor If the voltage reads within the range of 1 0 vdc 0 1 volt i...

Страница 20: ...b 11a 13a Copyright 2004 Carrier Corporation SEN Fig 12 Bypass Controller Operation Flow Chart LEGEND BP Bypass BP_SETPT System Pressure Setpoint DAT Duct Air Temperature DMP_POS Damper Position LAT L...

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