RKI Instruments 35-3000RK-LEL - Manual (Page 10)

10 • 35-3000RK-LEL Combustible Gas Sample-Draw Detector
NOTE: The sample-draw detector is shipped with the mounting feet “tucked under” the
housing to protect the mounting feet during shipment.
5. Slightly loosen the screw that secures the mounting foot to the housing, then rotate
the mounting foot 180 degrees (see Figure 3).
6. Tighten the screw that secures the mounting foot to the housing.
7. Repeat steps 3 and 4 for the remaining three mounting feet.
8. Position the sample-draw housing on a vertical surface at eye level (4 1/2 to 5 feet
from the floor).
9. Insert 1/4 inch or 5/16 inch screws through the slots in the mounting feet to secure
the housing to the mounting surface.
Connecting the Sample Lines to the Sample-Draw Detector
1. Attach 1/4 in. metal or rigid plastic sample tubing to the INLET fitting. Brass tubing is
recommended for most applications. If tubing corrosion caused by the air being
sampled is a concern, stainless steel tubing or rigid polypropylene tubing may be
used.
CAUTION: If you use flexible sample tubing (polyurethane for example), use an appropriate
metal insert to seal the connection between the tubing and the INLET fitting. See the
Parts List at the end of this manual, for an example of an appropriate metal insert.
2. Place the opposite end of the tubing at the sampling area.
CAUTION: Avoid loops or slumps in the incoming sample line. To reduce response time, keep the
incoming sample line as short as possible.
3. Attach rigid sample tubing to the EXHAUST fitting.
4. Route the opposite end of the tubing to an open area where the sample can safely
disperse.
Wiring the Sample-Draw Combustible Gas Detector to a Controller
WARNING: Always verify that the controller is off and that power to the controller is
off before you make wiring connections.
1. Turn off the controller
2. Turn off power to the controller.
3. Unlatch and open the housing door of the sample-draw detector.
4. Guide a six-conductor, shielded cable or six wires in conduit through one of the
conduit hubs at the bottom of the sample-draw housing.
5. Connect the cable to the sample-draw detector’s interconnect terminal strip as shown
in Figure 4.
6. Close and latch the housing door of the sample-draw detector.