Spectrex 20/20SI Triple IR (IR3) Flame Detector - Manual (Page 36)

Spectrex Inc. - SharpEye TM IR3 Flame Detector Manual – TM 20/20I, Rev. (6) August 2004
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6.6 Wiring (Refer to Fig. 12)
1 Disconnect
power.
2 Remove the four (4) protective set-screws from detector front. (Fig. 8 Item 1)
3 Release the four (4) socket-head screws that secure the detector housing
(Item 1) to its back cover (Item 5) Using HEX KEY No. 5. Hold the housing
(Item 1) during the removal of the screws. With the screws removed, pull the
detector housing (Item 1) from its cover (Item 5). The cover remains attached
to the detector mount, the housing slides under the cover and remains
attached to it by a securing cable (Item 2). The Terminal Board inside the
detector cover is now revealed.
4 Remove the protective plug mounted on the detector conduit inlet, pull the
wires through the detector cover (Item 5) and secure them firmly to the cover
using the cable-clamp (Item 3) attached to it. Use a 3/4"-14NPT or M25x1.5
explosion-proof conduit connection to assemble the conduit to the detector.
5 Connect the wires to the required terminals (Item 4) according to the wiring
diagram. See paragraph 6.7 and figures no. 10 and no. 11.
6 Connect the grounding wire to the ground screw outside the detector cover
(Fig. 8 item 2).
The detector must be well grounded to Earth Ground for proper
operation.
7 Verify the wiring. Improper wiring may damage the detector.
8 Check the wires for secure mechanical connection and press them neatly
against the terminal board to prevent them from interfering while closing the
detectors’ housing.