RKI Instruments 61-1001RK - Manual (Page 7)

61-1001RK Combustible Gas Detector• 3
The bottom conduit hub includes a 3/4 in. x 1/2 in. reducer that allows you to screw the
detector into the hub. The terminal block within the junction box facilitates the wiring
process. A cover on the front of the junction box allows access to the interior of the
junction box.
Installation
This section describes procedures to mount the hydrogen detector in the monitoring
environment and wire the detector to a controller.
NOTE: The NC-6205-01 detector retains its explosion proof classification only when
installed in the explosion proof junction box. The detector is not explosion proof
if installed in a controller conduit hub.
Mounting the Hydrogen Detector
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 detector 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 hydrogen, which is
lighter than air, mount the detector near the ceiling or where hydrogen is most
likely to accumulate.
Figure 2: Mounting the Hydrogen Detector
2.70 .38
.75
Rubber
Spacer,
3X
1/2'' NPT
3/4 NPT
Female
3.65
1 1/2-20 Thread for
Calibration Cup
2.50 MAX
Ø 1.50
NC-6205-01
1 1/2-20 Thread for Calibration Cup
3/4 x 1/2
Reducing
Bushing
J-Box
H2 LEL
Detector
7.50 MAX
61-1001RK
8.0 REF