Data Sheet for Product
Table Of Contents
- Figure 1. Dual Duct VAV Box with Two Inlet Flow Sensors.
- Figure 2. Dual Duct VAV Box with One Inlet and One Discharge Flow Sensor.
- Features
- Sequence of Operation
- Dual Cold
- Dual Hot
- Morning Warm-up/ Pre-Cool
- Off
- Test/Calibrate
- Occupancy Control
- Special Features
- Hardware Map – Dual Duct VAV/CV
- Wiring Diagram
- Bill of Materials
- Configuration Tables
- Control Mode Interaction Table –Dual Duct VAV with QVM
- Control Mode Interaction Table –Dual Duct CV with QVM
Document No. 588-023 Page 5 of 13
Morning Warm-up/ Pre-Cool
In these pre-occupancy modes, the Predator Controller controls the space temperature to the
occupied temperature setpoint using the unoccupied flow ranges. The perimeter heat operation is
configurable in Warm-up Mode.
Systems that have been sized for normal operation may sometimes fall below the total maximum
flow needs during morning warm-up (or pre-cool) operation. The demand limit input provides for
stable start up. Selection of the appropriate percentage will allow all boxes to provide airflow to the
space in equal proportions, thus eliminating starvation of zones.
Off
In this mode, the dampers will close fully and lighting is off.
Test/Calibrate
In the Test mode, the controller will close both dampers fully. The external sensors will be
recalibrated if configured to do so. Once commanded to Test Mode, the controller remains in this
mode (even if it is commanded to another mode) until the recalibration is complete. This process
takes approximately twice the longest damper travel time
.
Occupancy Control
Occupancy Mode
The Predator controller defaults to the Occupied Mode of operation. Upon receipt of the four-state
LonMark occupancy override (nviOccManCmd), the controller will switch to the appropriate mode of
operation. Following is a brief summary of each mode:
LonMark
Occupancy
State
Mode Description
(0) Occupied
Controller in Occupied Mode and uses occupied setpoints.
(1) Unoccupied
Controller in Unoccupied Mode and uses unoccupied
setpoints.
(2) Bypass
Controller temporarily in Occupied Mode and uses occupied
setpoints until the Bypass Time elapses. Controller then
returns to previous occupancy state.
(3) Standby
Controller in Standby Mode and uses standby setpoints.
If a LonMark compatible occupancy schedule input (nviOccSchedule) is used, the controller will use
the modes and setpoints as shown above. This will allow the Predator controller to utilize the
scheduling properties of other devices on the LonTalk Network.
The occupancy signal could also come from a time clock, wall switch, or occupancy sensor
physically wired to one of the inputs of the Predator Controller (see Figure 10). This occupancy
signal could then be shared with other controllers via the LonTalk Network.