Spectrex 20/20SH - Hydrogen Flame Detector - Manual (Page 31)

Spectrex Inc. - SharpEye TM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005
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6.3 Preparations for Installation
Installation should comply with NFPA 72E or other local codes, as applicable to
flame detectors. The detectors can be installed with the use of general-purpose
common tools and equipment.
1 Verify the appropriate Purchase Order. Record the Part No. and the Serial No.
of the detectors and the installation date in the appropriate Log-book.
2 Open the container package prior to detector installation and visually inspect
the detector.
3 Verify that all components required for the detector installation are readily
available before commencing the installation. In case that the installation is
not completed in a single session, secure and seal detectors and conduits.
4 For wiring, use color-coded conductors or suitable wire markings or labels.
12 to 20 AWG wires may be used for site wiring. The selection of wire gauge
should be based on the number of detectors used on the same line and the
distance from the control unit, in compliance with specifications
(See Appendix A).
6.4 Conduit Installation
1 To avoid water condensation water in the detector, it should be installed with
the conduits /cable entries facing downwards, and should include drain holes.
2 When using the optional swivel mount, use flexible conduits / cables for the
last portion connecting to the detector.
3 For installations in atmospheres as defined in group B of the NFPA 72E,
conduits inlets should be sealed.
4 When pulling the cables through the conduits, ensure that they are not tangled
or stressed. Extend the cables about 30 cm. (12 in.) beyond the detector
location to accommodate wiring after installation.
5 After the conductor cables have been pulled through the conduits, perform a
continuity test.