3
Helvar Flush-Mount PIR Switching Sensor: Installation Guide
Setup
Presence Mode
Auto on, auto off via time-out settings (no manual wall switch control). Multiple sensors can be connected to the same load
in order to extend the detection zone (see figure in section ‘Multiple sensors’ on page 2). When used in conjunctions
with illuminance settings, the load will only switch on if the detected light levels are below the minimum level set on the
illuminance threshold adjuster.
Absence Mode
Manual on via wall switch, auto off via time-out settings or manual off via wall switch. Single sensors only. Not for use with
multiple sensors in parallel.
Illuminance Setup
Notes:
It is best to adjust the illuminance setting when the ambient light level is at the required minimum level.
For loads that should switch on regardless of ambient light levels, set the illuminance setting to maximum (photocell
inactive).
1. Set the illuminance setting to minimum and wait for the load to switch off.
2. Slowly increase the illuminance setting while waving your hand below the sensor until the connected load switches on.
Time Setup
Set the time appropriately for the usage of the area. For example, some possible settings could be:
• Offices with workers regularly walking:
20 min
• Offices with mainly desk-based workers: 40 min
• Corridors:
5 min
• Washrooms with total coverage:
10 min
• Washrooms with entry coverage only:
40 min
• 2D fittings:
Not less than 20 min, due to potential lamp failure. If in doubt, contact your
lamp manufacturer.
Connection and Fixing
Attach
the cover
Connect the power
cable (and wall
switch in absence
mode only)
3.
4.
1.
2.
Squeeze the spring
coils together and
fit onto each of the
two lugs in turn
Then repeat the operation
with the other spring
Push the unit
into the ceiling void
⌀
75 mm
Then centre it
about the hole
as required
