65-2331-04 H
2
S Transmitter • 17
tape to the hub and/or detector threads to seal them.
9.
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 for the detector wiring connections to the
amplifier.
10. Screw the calibration adapter/splash guard onto the new detector.
11. Reinstall the detector terminal strip into its socket.
12. Reinstall the detector junction box cover.
13. Turn on or plug in power to the controller.
14. Turn on the controller and place it into normal operation.
CAUTION:
Allow the replacement detector to warm up for 5 minutes before you continue with
the next step.
15. Calibrate the replacement detector as described in “Calibration” on page 19.
Replacing the Amplifier
NOTE:
The amplifier is not housed in the same junction box as the H
2
S detector. The
amplifier junction box should be somewhere accessible.
1.
Turn off the controller.
2.
Turn off or unplug power to the controller.
3.
Remove the amplifier junction box’s cover.
4.
Unplug the detector terminal strip and controller terminal strip from their sockets.
You may leave the wires connected to the terminal strips.
5.
Unscrew and remove the screw with the flat and lock washers that secures the
amplifier to the junction box. The screw is at the bottom right of the amplifier.
6.
Remove the old amplifier.
7.
Place the new amplifier in the same position as the old amplifier. A foam gasket that
orients the amplifier and keeps it from rotating is installed on the bottom of the
amplifier. Make sure the amplifier is seated flat in the junction box.
8.
Install the new amplifier into the junction box with the screw, lock washer, and flat
washer you removed in Step 5.
9.
Install the detector and controller terminals strips into their sockets on the new
amplifier as shown in Figure 6 and Figure 7. If controller leads or detector leads were
removed during this procedure, refer to Figure 6 and Figure 7 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. Reinstall the amplifier junction box cover.
11. Turn on or plug in power to the controller.
12. Turn on the controller and place it into normal operation.
