2:4 (8), 0-004-7516-1 (GB)
TAC AB, 1999-08-18
TAC Xenta 102 Handbook
The zone controller TAC Xenta 102
Window
contact
Damper and air
flow controller
Wall
module
Occupancy
sensor
Carbon dioxide
sensor
Figure 2.3 Control application for TAC Xenta 102-B
2.3
Applications
2.3.1 General
All models have this in common:
• they are intended for use together with a Belimo® VAV-Compact
air flow controller. TAC Xenta 102 sends air flow setpoints to the
VAV-Compact, and reads measured air flow from the air flow con-
troller.
• they have air quality control as an option, which means that the
controller can control the air flow to keep down the carbon dioxi-
de concentration in the zone. However, the function needs a car-
bon dioxide sensor to be connected to the controller, electroni-
cally or via the network.
• a window contact to stop the heating and cooling functions,
should a window be opened, can be connected. An occupancy
sensor can detect the presence of a person in the controlled zone
and change the controller from economy to comfort mode.
The window contact sensor, occupancy sensor, and air quality
control are described in detail in section 5.3.2–5.3.4.
2.3.2 Air flow control only (TAC Xenta 102-B)
The controller controls the zone temperature by means of the
air damper via VAV-Compact. The air flow is minimum and
maximum limited. Usually the controller only uses one cooling
sequence (sub-tempered air in the duct), but it can be changed
to heating (hot air in the duct) given a central command.
