65-2646XL-05-04 M2A Transmitter Operator’s Manual
Chapter 7: Maintenance
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6. Remove the replacement sensor from its packaging and remove the wire jumper. This wire
jumper is installed on the sensor pins for shipment or storage but must be removed for the
sensor to operate properly when installed in a detector.
NOTE:
The sensor will not operate properly if the wire jumper is not removed.
Figure 10: Plug-In Sensor Jumper Removal
7. Install the rubber boot and charcoal filter onto the new sensor’s face.
8. Carefully plug the replacement sensor into the four-socket pattern that is located in the
detector housing.
9. Make sure the cap gasket is in place and screw the detector housing cap back onto the detector
housing body.
10. Screw the calibration adapter/splash guard back onto the detector housing cap.
11. Turn on or plug in power to the M2A.
CAUTION:
Allow the replacement sensor to warm up for 5 minutes before you
continue with the next step.
12. Calibrate the transmitter as described in the “Calibration” on page 41.
Replacing the CO Detector
NOTE:
In most cases, it is only necessary to replace the plug-in CO sensor.
1. Turn off or unplug power to the M2A.
2. Remove the detector junction box cover.
3. Unscrew the calibration adapter/splash guard from the detector housing cap.
4. Disconnect the detector leads from the terminal block in the detector junction box. Note the
position of the color-coded leads as you remove them.
5. Unscrew the detector from the detector junction box.
6. Guide the detector leads of the replacement detector through the bottom conduit hub of the
detector junction box, then screw the mounting threads of the detector into the conduit hub. If
necessary for environmental conditions, apply thread sealant or Teflon tape to the hub and/or
detector threads to seal them.
Remove jumper
