RKI Instruments 65-2400RK-05 - Manual (Page 5)

Combustible Gas Transmitter • 5
Installation
This section describes procedures to mount the combustible gas transmitter in the
monitoring environment and wire the transmitter to a controller.
Mounting the Combustible Gas Transmitter
1. Select a mounting site that is representative of the monitoring environment. Consider
the following when you select the mounting site.
• Select a site where the transmitter is not likely to be bumped or disturbed. Make
sure there is sufficient room to perform start-up, maintenance, and calibration
procedures.
• Select a site where the target gas is likely to be found first. For lighter gases,
mount the detector near the ceiling; for heavier gases, mount the detector near the
floor.
Figure 2: Mounting the Combustible Gas Transmitter
If the combustible gas detector is mounted to the junction box, skip to step 5. If not,
continue with step 2.
NOTE: The LEL detector is normally provided with a Killark HKB junciton and an HFC
lid rated explosion proof for ClassI, Groups B, C, and D. This combination is
shown in Figure 2 above. Any junction box with an internal volume less than or
equal to 69 cubic inches and rated explosion proof for ClassI, Groups B, C, and D
may be used.
2. Remove the junction box cover.
3. Guide the four wires that extend from the top of the combustible gas detector through
3/4 Conduit Hub 3.94
2.3 max
1.1
5.46
2.75
5.2
Ø .25 Mounting Holes, 2X
6.1
7.7 max