Edwards Signaling ReadySet - Manual (Page 27)

Chapter 3: Installation and configuration
ReadySET Aspirating Smoke Detection System Installers Handbook 19
Figure 8 below shows a typical mounting to stand sampling pipe away from high velocity
low pressure air at the entrance to the return air grill.
Figure 8: Return air grill sampling method
Installation
Installation guidelines
The following is a brief set of guidelines on installing detectors:
• The detector should normally be mounted at a level where there is easy access.
• The exhaust air from the unit must not be impeded in any way. If the detector is
mounted in a different air pressure than where the air is being sampled (for example
an air duct), then a pipe must be routed from the exhaust port back to the same air
pressure zone as the sampling holes.
• All wiring must comply with NEC, NFPA 70, and the requirements of the local AHJ.
All signal cables must be suitable for the application.
• The detector must not be placed in areas where either the temperature or humidity is
outside the specified operating range.
• The detector should not be placed in close proximity to any equipment expected to
generate high radio frequency levels (such as radio alarms) or units generating high
levels of electrical energy (such as large electric motors or generators).