Manual

35-3001-01-02 Combustible Gas Sample-Draw Detector • 9

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 1 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 4 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 1 for maximum tubing lengths based on tubing

size.

Wiring the Combustible Gas 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 six-conductor, shielded cable or six 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

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.