4
• During extreme weather conditions the PIR may exhibit
unusual behaviour if placed in sight of a window. Once
normal weather resumes, the PIR will carryout normal
operations.
5. Installation
• Ensure the mains supply is switched off and the circuit
supply fuses are removed or the circuit breaker turned off.
• An isolating switch should be installed to enable the power
to be switched ON and OFF to the PIR. This allows the
unit to be easily switched OFF for maintenance purposes.
• Mark the position of the fitting
holes using the base of the PIR
as a template, taking care to
avoid ceiling joists and other
obstructions within the
installtion area.
Take note of the hole centres
of the base plate for reference.
60
70
80
50.8
