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Appendix A: VVT Zone Controller Points/Properties
Point Name/Description
DCV Max Ctrl Setpoint – If Optional Sensor Type is set to IAQ Sensor and DCV Control is set to
Enable, this is the value that the CO2 level must exceed to begin the IAQ function to control the
damper to DCV MAX Vent Airflow
Parallel Fan ON Value – If Terminal Type is Parallel Fan and the zone does not require heating,
when the zone's airflow control setpoint decreases below this value, the parallel fan turns on to
increase airflow, ventilation, and prevent cold air dumping into the zone. If the airflow control
setpoint rises above this value by more than 1 cfm, the parallel fan turns off. We recommend
this value be set to approximately 10% above the Occupied Min Airflow
disable this function.
Alarm Configuration
Navigation:
i-Vu / Field Assistant:
BACview:
Point Name/Description
Space Temperature Alarm
Occupied Alarm Hysteresis – This value is added to the effective cooling setpoints and
subtracted from the effective heating setpoints as output from the Setpoint
microblock. These values establish the occupied high and low limits that the space
temperature must exceed before an occupied SPT alarm is generated. The alarm
returns to normal when the space temperature drops below the high effective setpoint
or rises above the low effective setpoint.
Alarm Delay (min/deg)
– Determines the amount of delay before an occupied space
temperature alarm is generated when the controller transitions to the occupied mode.
The delay time equals this value multiplied by the difference between the sensor
temperature and occupied alarm setpoint plus 15 minutes.
Unoccupied Low SPT Alarm Limit –The value that the space temperature must drop
below to generate a Space Temperature Alarm
fixed hysteresis of 1° F for return to normal.
Unoccupied High SPT Alarm Limit – The value that the space temperature must
exceed to generate a Space Temperature Alarm
fixed hysteresis of 1° F for return to normal.
Supply Air Temperature Alarm
Low SAT Alarm Limit – The value that the supply air temperature must drop below to
generate a Supply Air Temp Alarm
normal.
High SAT Alarm Limit – The value that the supply air temperature must exceed to
generate a Supply Air Temp Alarm
normal.
58
.
Properties
Equipment
>
HOME
CONFIG
>
>
in the unoccupied mode. There is a
in the unoccupied mode. There is a
. There is a fixed hysteresis of 1° F for return to
. There is a fixed hysteresis of 1° F for return to
setpoint. Set to 0 to
Configuration
Alarm Configuration
>
>
ALARMS
Default/Range
D:
1050ppm
R:
0 to 9999 ppm
D:
0 cfm
R:
0 to 99999 cfm
Default/Range
D:
5°F
R:
0 to 20°F
D:
10 minutes
R:
0 to 30 minutes
D:
45°F
R:
35 to 90°F
D:
95°F
R:
45 to 100°F
D:
45°F
R:
15 to 90°F
D:
120°F
R:
90 to 175°F
VVT Zone Controller
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