Data Sheet for Product

Page 2 of 11 Document No. 588-894
Heating
The heating PID maintains the measured space temperature at the occupied heating setpoint by
modulating perimeter heat, the reheat coil and the primary airflow setpoint. The setpoint varies
between the maximum heating flow and the minimum heating flow. Relative sequencing of
perimeter heat, the reheat coil and the primary airflow is set according to site-specific requirements.
Lighting is on.
Unoccupied Mode
The Predator applies unoccupied settings for the space temperature setpoints and the primary
airflow minimum. The typical result is a wide operating band with no HVAC energy consumption,
and heating or cooling applied only at extreme conditions.
Cooling
The cooling PID maintains the measured space temperature at the unoccupied cooling setpoint by
modulating the primary airflow setpoint between the maximum cooling flow and the unoccupied
minimum flow.
The primary airflow PID maintains the measured airflow at the varying setpoint by modulating the
position of the primary air damper.
The reheat coil is off.
Perimeter heat is off.
Lighting is off.
Heating
The heating PID maintains the measured space temperature at the unoccupied heating setpoint.
Operation of each HVAC device, in response to heating demand is selectable in the unoccupied
mode. The behavior of primary air damper and reheat coil may be individually configured. They
may be locked out, modulated or cycled according to the required sequence.
Lighting is off.
Bypass Mode
During unoccupied periods, an occupant can put the Predator in the bypass mode by pressing the
bypass button on the room temperature sensor. This causes the controller to operate exactly as in
the occupied mode, for an adjustable amount of time.
Standby Mode
Standby mode applies separately adjustable temperature and ventilation setpoints. These may be
adjusted to conserve energy, but allow quicker recovery compared to the unoccupied mode.
Otherwise, operation is the same as the unoccupied mode.
Morning Warmup
During unoccupied periods, if the Predator is commanded to warmup mode, it applies the occupied
heating setpoint (to restore comfort conditions) and the unoccupied minimum flow (because
occupants are not present). Operation of each HVAC device, in response to heating demand is
selectable in the warmup mode. The behavior of perimeter heat, the primary air damper and the
reheat coil may be individually configured. They may be forced on, locked out, modulated or cycled
according to the required sequence.
Lighting is off.