Carrier VVT 33ZC, Installation, Start-Up And Configuration Instructions

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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