Honeywell E3Point User Manual page 10

Installation
Close the unit cover and tighten screws to 29.7 in-lb (3 Nm).
Do not remove PC board when removing knockouts.
Knockout on back is not for conduit entry.
General Mounting Considerations:
Must be easily accessible for calibration and maintenance.
Mount the sensor close to the potential leak source for fastest
possible leak detection.
If personnel protection is the primary application, mount in the
"breathing zone" (1–1.5m from the ground, within the range of a
person' s respiration area).
Protect the sensor from water, excessive humidity, and wash-
down.
Take air movement and ventilation patterns into account.
To prevent electrical interference, keep sensor and wire runs
away from mercury vapor lights, variable speed drives, and radio
repeaters.
Protect the sensor from physical damage (fork lifts, etc.).
Do not mount the sensor over a door in a refrigerated area.
For highly critical locations, more than one sensor should be
installed in each room.
Very Important:
Never mount the sensor flat on a ceiling.
Never mount the sensor on a vibrating surface.
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E Point Standalone Gas Monitor User Manual