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17.3
PROTECTION AGAINST MOISTURE DAMAGE
It is important to take proper precautions during
installation to ensure that moisture will not come in
contact with the electrical connections or components
of the system. The integrity of the system regarding
moisture protection must be maintained for proper
operation and is the responsibility of the installer.
If conduit is used, we recommend installing drains,
according to local codes, at water collection points
to automatically drain accumulated moisture. It is
also recommended to install at least one breather,
according to local codes, at upper locations to provide
ventilation and allow water vapor to escape.
Conduit raceways should be inclined so that water will
flow to low points for drainage and will not collect inside
enclosures or on conduit seals. If this is not possible,
install conduit drains above the seals to prevent the
collection of water or install a drain loop below the
detector with a conduit drain at the lowest point of the
loop.
Conduit seals are not required for compliance with
explosion-proof installation requirements, but are
highly recommended to prevent water ingress in
outdoor applications. Units with M25 threads must use
an IP66/IP67 washer to prevent water ingress.
WIRING PROCEDURE
Wire Size and Type
The system should be wired according to local
codes. The wire size selected should be based on the
number of detectors connected, the supply voltage
and the cable length. Typically 16 AWG or 2.5 mm
2
shielded cable is recommended. Wires should be
stripped 3/8 inch, 9 mm. A minimum input voltage of
18 Vdc must be present at the detector.
NOTE
Re fe r to “ Powe r C o n s u m p t i o n” i n t h e
“Specifications” section of this manual.
The use of shielded cable is required to protect against
interference caused by EMI and RFI. When using cables
with shields, terminate the shields as shown in Figures 7
through 12 and Figure 15. Consult the factory if not using
shielded cable.
In applications where the wiring cable is installed in
conduit, the conduit must not be used for wiring to other
electrical equipment.
If disconnection of power is required, separate disconnect
capability must be provided.
WARNING
All entries must contain appropriately rated plugs
or fittings. It is required that each plug or fitting
be wrench-tightened to an appropriate installation
torque and meet the minimum thread engagement
requirements per the applicable local standards,
codes, and practices in order to retain the defined
ratings. PTFE sealant or equivalent should be used
on NPT threads.
IMPORTANT
Devices certified for hazardous locations shall be
installed in accordance with EN/IEC 60079-14 and
NEC 505.
CAUTION
Installation of the detector and wiring should be
performed only by qualified personnel.
13.1
(33.3)
10.6
(27.0)
4.0
(10.2)
4.0
(10.2)
3.0
(7.6)
3.0
(7.6)
4X ø0.42
(1.1)
F2069
NOTE: THIS ILLUSTRATION SHOWS THE
DETECTOR MOUNTED AT THE 10° MINIMUM.
THESE DIMENSIONS WILL CHANGE BASED
ON THE DETECTOR’S MOUNTING ANGLE.
Figure 3—Q9033 Mounting Arm without Collar Attachment Dimensions in Inches (cm)
(See Figure 1 for Correct Detector Orientation.)
