35-3001A-04-02 Carbon Monoxide Sample-Draw Detector • 21
7. Install the new filter. If there is an arrow on the filter, be sure that it’s pointing in the direction
of flow which is toward the tubing that goes to the CO detector flow block inlet.
8. Turn on power to the controller.
9. Turn on the controller and place it into normal operation.
10. Verify that the flow rate is approximately 1.0 SCFH, then close the housing door.
Replacing the Hydrophobic Filter
1. Turn off the controller.
2. Turn off power to the controller.
3. Open the housing door of the sample-draw detector.
4. Disconnect the filter from the rubber elbows on each end of the filter, then remove the filter
from the sample-draw detector.
5. Install the new filter. Be sure the side of the filter marked “INLET” is connected to the elbow
that is connected to the inlet fitting.
6. Turn on power to the controller.
7. Turn on the controller and place it into normal operation.
8. Verify that the flow rate is approximately 1.0 SCFH, then close the housing door.
Replacing the Particle Filter
1. Turn off the controller.
2. Turn off power to the controller.
3. If the particle filter is installed at the inlet fitting:
1. Disconnect the tubing routed to the sampling area, if installed, from the particle filter.
2. Disconnect the particle filter from the tubing stub.
3. Install the new particle filter onto the tubing stub. Be sure the arrow on the particle filter is
pointing toward the inlet fitting.
4. Reinstall the tubing routed to the sampling area.
4. If the particle filter is installed at the end of the inlet line:
1. Remove the particle filter from the tubing stub.
2. Install the new particle filter onto the tubing stub. Be sure the arrow on the particle filter is
pointing toward the inlet line.
5. Turn on power to the controller.
6. Turn on the controller.
