Spectrex 20/20SH - Hydrogen Flame Detector - Manual (Page 53)

Spectrex Inc. - SharpEye TM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005
45
Appendix D - Mounting the “EExde approved”
version
The EExde approved version provides an additional EExe terminal box attached
below the EExd detector and therefore allows easier access in hazardous areas
(see fig. 18). The detector is prewired to the terminals in the additional EExe
terminal section ready for field wiring connections
Due to restricted number of terminals, there are two options for this pre-wiring
(paragraph 2.1)
• RS-485 & 4-20mA
• Alarm & Fault Relays
1. Detector Mounting
The detector may be mounted on a simple fabricated bracket, or preferably the
optional Swivel Mount, Model 20/20-003. The Swivel Mount enables the detector
to be rotated up to 40 degrees in all directions.
1.1 Swivel Mount Kit - Use the kit from the paragraph 6.5.1
1.2 Swivel installation
1 Refer to Fig.8 and Fig 9. Place the swivel mount (item 6) in its designated
location and secure it with four (4) M6 or 1/4" screws (item 11)
(recommended), placed 76.2 mm. (3.0 in.) apart on the swivel mount plate
(item 10).
Note: Skip this step if the Swivel Mount is already installed. Also detector
removal for maintenance purpose does not require Swivel Mount removal.
2 Unpack the detector.
3 Place the detector, with its conduit inlets pointing downwards, on the holding
plate of the swivel mount (Fig. 9 item 7). Secure the detector by four (4) M6
screws with M6 spring washers from the Swivel Mount Kit using the holes
(Fig. 9 item 5). You can use the thread on the modified cover (Fig. 18 item 1)
marked either triangle symbol or square symbol. Use No. 5 Hex Key for M6
screws.
4 Tighten the three locking 3/8"-24UNF screws (Fig. 9 item 8) of the swivel
mount ring until the friction in the ball joint holds the detector in its position.
Yet, still permits it to be moved by hand-applied force (Use 3/16" HEX KEY).
5 Point the detector towards the protected area and make certain that the view
of the area. Secure the detector in that position by tightening the locking
screws (Fig.9 item 8) of the swivel mount ring.
The detector is now correctly located and aligned and ready for connecting to the
system.