Variable air volume controllers
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Argus-IR24-PC
Presence detector
IR24-P is a presence detector designed for automatic
ventilation control of HVAC systems.
• Power supply 24 V AC/DC
• Intended for ceiling mounting
• 360° detection
• Individually settable On and Off delays
• Change-over output
• Unobtrusive design
IR24-PC is a 360° presence detector for automatic ventilation
control of HVAC systems. It uses infrared light. The detector
has a change-over output for activation/deactivation of a fan
coil controller.
Detection pattern
On/Off delays
IR24-PC has individually settable On and Off delays. The
delays are designed to provide better energy management
of HVAC systems. The On delay is the time given to the
sensor to certify the occupancy before it activates the fan
coil controller. The Off delay is the operating time for the fan
coil after the last detection. The On and Off delays are set by
placing the jumper head on the corresponding pins according
to the table and figure below.
Installation
Loosen the screw and remove the cover. Carefully lift out the
electronics cassette by bending the plastic clips outwards.
Lead the cable into the bottom part. Mount the bottom part
on the ceiling. Replace the electronics
cassette and connect the cable to the corresponding
terminals (see the section Wiring on the next page). Finally,
replace the front cover.
Note: Do not touch the infrared sensor in the middle of the
electronics cassette.
Testing the function
To test the function of the detector, apply power supply and
wait for the detector to warm up (~25 sec.). The LED will
blink (long and short) during the warm-up period. Ensure
that the jumper head connectors of the
On and Off delays are placed in the “A” position (the shortest
time). Walk across the detection zones at normal speed. The
LED will be lit when the sensor detects the motion.
Note: The LED will blink if a jumper head connector is not
properly placed.
6 4 2 0 2 4 6
2.4
3.0
3.6
4.2
Top view 360°
Side view
Mounting height
(m)
2.4 3.0 3.6 4.2
Diameter coverage 6.0 7.5 9.0 10.5
A
B
C
E
E
F
ON 0
10
30
60
300
600
OFF
10
60
300
600 1200 1800
(Values in seconds)
