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2
Installation
Locating the Sensor
A
Because each sensor can only "report" what it is
seeing at the moment, it is very important that the
sensor be located where leaks are most likely to
occur. CFC/ HCFC/HFC vapor is heavier than
ambient air, so in a room with no air movement it will
tend to settle. For quickest detection, mount the
sensor about one to two feet from the floor, close to
the potential leak source.
If the primary application is the fastest possible leak
detection, mount the sensor near the potential leak
sources. In doing this, be aware that the indicated
concentration may not be representative of
personnel exposure and easy access for the
required calibration and maintenance could be
compromised.
General Mounting Considerations:
•
Must be easily accessible for calibration and
maintenance.
•
Always mount the sensor vertically.
•
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."
•
Protect 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 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.
Manning AirScan-iR Refrigerant Sensor
19100 AirScan-iR-ind 05/2006 REVA Copyright © 2006 Manning Systems, Inc. All Rights Reserved.
Very Important:
•
Sensor must be mounted vertically
•
Never mount sensor flat on a ceiling
•
Enter enclosure only through existing hole in
bottom of enclosure
•
Always make a drip loop in the conduit
•
Never mount sensor on a vibrating surface.
Mount sensor enclosures through the flange holes as
shown in Figure 1, and always mount vertically.
Penthouses: Multi-Coil (defrost one coil at a time)
In this case the best location is usually in the center
of the penthouse four or five feet above the grate.
Single Coil (or when all coils defrost at the same time)
In this case high moisture conditions can occur and
the sensor should be mounted one foot above the
grate.
Engine Rooms: The Manning AirScan
should be mounted in a cool part of the room, if
possible. Keep the sensor away from hot air
exhausting from electric motors or other machinery.
Figure 1. Mounting Dimensions
4"
MOUNT ENCLOSURE THIS END UP. DO NOT BLOCK PERFORATED VENT HOLES.
Manning AirScan
TM
iR sensor
5/16" diameter
8 3/4"
5
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