35-3001A-04-03 Carbon Monoxide Sample-Draw Detector • 21
10. Connect the detector leads to the appropriate detector terminal strip terminals. Connect the red
wire to the terminal labeled TOXIC+ and the black wire to the terminal labeled TOXIC-. See
Figure 6 on page 15 for the detector wiring connections to the amplifier.
11. Reinstall the detector terminal strip into its socket on the CO amplifier.
12. Close and latch the housing door.
13. Turn on power to the controller.
14. Turn on the controller.
15. Allow the sample-draw detector to warmup for 5 minutes.
16. Calibrate the replacement sensor as described in “Calibration” on page 25.
Replacing the CO Amplifier
1. Turn off the controller.
2. Turn off power to the controller.
3. Open the housing door of the sample-draw detector.
4. Remove the detector and controller plug-in terminal strips by grasping the sides of the strips
with your fingers. Let the terminal strips hang by their connected wires while you replace the
amplifier.
5. Unscrew the screw in the lower left corner of the amplifier and remove the screw, lock washer,
and flat washer. Be careful not to lose any of these parts.
6. Remove the old amplifier.
7. Place the new amplifier in the same position as the old amplifier. See Figure 1.
8. Reinstall the screw, lock washer, and flat washer you removed in Step 5.
9. Install the detector and controller terminal strips into their sockets on the new amplifier as
shown in Figure 6 on page 15. If any leads were removed during this procedure, refer to Figure
6 on page 15 for the detector and amplifier connections.
NOTE:
When a transmitter is first powered up with a new amplifier, the initial output may be
either high or below zero depending on the setting of the zero pot. Be sure to make
arrangements so that this does not cause unwanted alarms.
10. Turn on power to the controller.
11. Turn on the controller and place it into normal operation.
12. Allow the sample-draw detector to warmup for 5 minutes.
13. Calibrate the sample-draw detector as described in “Calibration” on page 25.
Replacing the Charcoal Filter
1. Turn off the controller.
2. Turn off power to the controller.
3. Open the housing door of the sample-draw detector.
4. The charcoal filter is located between the CO detector flow block and the CO amplifier.
5. Pull the charcoal filter away from the main circuit board so that it is easier to access.
6. Disconnect the filter from the rubber elbows on each end of the filter, then remove the filter
from the sample-draw detector.
