Occupancy - Carrier TruVu VAVB3-E2 Installation And Startup Manual

Start-up

Occupancy

The TV-VAVB3-E2's operation depends on the zone's occupancy state as determined by occupancy schedules or a
remote occupancy override.
Occupancy Schedules – An occupancy schedule can be one of the following:
•
A local schedule set up directly in the controller using a touchscreen or Field Assistant.
•
A System Occupancy network point. This point links the controller occupancy to another controller in the
network so that multiple zones can follow the occupancy of another VAV Zone or other controller on the
network.
To set up occupancy schedules, you first define a schedule for each day of the week and then define schedules
for the exceptions, such as holidays. The exceptions can be based on a date, a date range, or a week and day.
NOTES
•
The Occupancy Schedules property must be enabled (default).
•
A network schedule downloaded from the i-Vu® application will overwrite a local schedule that was set up in
a touchscreen or Field Assistant.
Remote Occupancy Override – The controller monitors its IN-04 input that is typically connected to the isolated,
dry contact of an occupancy sensor located in the zone. (To use the occupancy override as described here, the
Standby Offset value must be set to zero.) The controller can override the occupancy state based on whether or
not the space is actually occupied. If the occupancy sensor contact is in the same state as Occ Override Normal
Logic State setting, the zone follows its normal occupancy schedule. If the contact is in the opposite state, it
overrides the zone into the unoccupied mode. The input can be configured for normally closed or normally opened
contact types and is set to Open by default so that it does not affect the controller occupancy operation if left
unused.
The IN-04 input can also be used to expand the setpoints during occupied periods without affecting the occupancy
status of the zone. When the zone is occupied and the IN-04 input senses the occupant has left the zone, if a
value greater than zero has been entered for the Standby Offset, then the occupied setpoints will be expanded by
that number of degrees. This provides the ability to save energy but recover more rapidly rather than having the
zone go unoccupied.
Learning Adaptive Optimal Start – This function gradually adjusts the unoccupied setpoints over a specified
period of time to achieve the occupied setpoint by the time scheduled occupancy begins. This learning adaptive
algorithm uses the learned heating capacity and learned cooling capacity values to calculate the effective
setpoints prior to the occupied start time. The algorithm calculates a learned cooling and heating capacity during
the previous unoccupied time. Set the Learning Adaptive Optimal Start recovery period from 1 to 4 hours in
Optimal Start. When the Learning Adaptive Optimal Start routine runs, adjustments are based on the color that is
achieved when occupancy begins. Adjustment amounts are defined in the thermographic color fields located
directly above the Effective Setpoints graph under Setpoints.
BAS On/Off – This function allows third party control of the controller occupancy. Occupancy Schedules must be
set to Disable to use this function. When set to Occupied or Unoccupied, Optimal Start is automatically disabled.
For additional information on ZS Sensor occupancy and override settings, see Maintenance (page 128) Points and
Properties.
TruVu™ VAVB3-E2
Installation and Start-up Guide
66
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