Spectrex 20/20U (UB) - UV Flame Detector - Manual (Page 33)

Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004
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6.6 Wiring (Refer to Fig. 5)
1 Disconnect
power.
2 Remove the four protective set-screws (Fig 4a, item 1) from detector front.
3 Release the four socket-head screws that secure the detector housing (Item
6) to its back cover (Item 3) using No. 5 Hex Key for M6 screw. Hold the
housing during the removal of the screws. With the screws removed, pull the
detector housing from its cover. The cover remains attached to the detector
swivel mount. The housing slides under the cover and remains attached to it
by a securing cable (Item 8). The terminal board (Item 7) inside the detector
cover is now revealed.
4 Remove the protective plug mounted on the detector conduit inlet (Item 10).
Pull the wires through the detector cover (Item 6) and secure them firmly to
the cover using the cable-tie (Item 11) attached to it. Use a 3/4”-14NPT or
M25 x 1.5P explosion-proof conduit/cable gland connection.
5 Connect the wires to the required terminals (Item 7) according to the wiring
diagram. See section 6.7 and figures 5 and 6.
6 Connect a Grounding Cable to the Ground Terminal (Item 4) outside the
detector cover (Item 6). For FM installation connect the Grounding Cable to
the Ground Thread (Item 4) using appropriate screw.
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 (Item 7) to prevent them from interfering while
closing the detector’s housing.