35-3001-13-02 Carbon Dioxide/Oxygen Sample-Draw Detector • 13
4. Route tubing from the inlet fitting to the sample area. See “Specifications” on page 5 for maximum tubing
lengths based on tubing size.
CAUTION:
Avoid loops or slumps in the incoming sample line. To reduce response time, keep the incoming
sample line as short as possible.
5. If desired, install the particle filter onto the end of the inlet line. Be sure the arrow on the particle filter is
pointed toward the inlet line.
Installing the Exhaust Line
1. Loosen the nut on the exhaust fitting until 3 threads are visible.
2. Push 1/4” O.D. rigid polypropylene or rigid Teflon sample tubing into the fitting until it stops. Flexible
polyurethane tubing may be used with an appropriate insert. RKI Instruments, Inc. recommends using either
1/4” O.D. x 1/8” I.D. or 1/4” O.D. x 0.170” I.D. tubing based on your length requirements. See
“Specifications” on page 5 for maximum tubing lengths based on tubing size.
CAUTION:
If you use
flexible
sample tubing (polyurethane is acceptable), use an appropriate insert to seal
the connection between the tubing and the inlet fitting.
3. Hand tighten the nut on the exhaust fitting so the ferrules clamp on the tubing. If the tube nut is removed, see
Figure 5 for the arrangement of the fitting components.
4. Route the opposite end of the tubing to an open area where the sample can safely disperse or to an exhaust
duct. See “Specifications” on page 5 for maximum tubing lengths based on tubing size.
Wiring the Sample-Draw 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 eight-conductor, shielded cable or eight wires in conduit through the conduit hub at the bottom of
the sample-draw housing. A minimum of 18 AWG wire is recommended.
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.
CAUTION:
If using shielded cable, leave the cable shield’s drain wire insulated and disconnected at the
sample-draw detector. You will connect the opposite end of the drain wire at the controller.
7. Route the cable or wires in conduit leading from the sample-draw detector through one of the conduit hubs
at the controller.
