Cal Flame FM-204 Operator's Manual Page 92

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82 Replacing a Sensor EAGLE 2 Operator’s Manual
If the sensor stayed in the flow chamber, grasp the sensor and pull it
out of the flow chamber.
8. To remove the oxygen sensor, do the following:
Unscrew the two screws that hold the oxygen sensor bracket a few
turns so that you can rotate and remove the oxygen sensor bracket.
Make sure to note the routing of the oxygen sensor cable to the main
PCB so that you can route the replacement sensor cable the same
way. Also make sure that the O-ring in the bottom of the flow
chamber does not come out with the sensor.
Move the hydrophobic filter towards the bottom case side wall and
pull the oxygen sensor out of the flow chamber.
Hold the main PCB to support it where the oxygen sensor cable
connects to it.
Grasp the connector on the end of the sensor cable and pull the
connector away from the main PCB to disconnect it from the main
PCB.
9. To remove the H
2
S and CO sensors, do the following:
Grasp the sensor firmly and rock it back and forth slightly while
pulling on it. Make sure to note the routing of the sensor cable to the
main PCB so that you can route the replacement sensor cable the
same way.
If the sensor does not come out of the flow chamber easily enough
using this method, grasp it with a pair of pliers and rock it back and
forth slightly while pulling on it.
CAUTION: If using pliers to remove a sensor, be careful not to damage the
sensor in case you find that the sensor is still functional and
does not need to be replaced.
Hold the main PCB to support it where the sensor cable connects to it.
Grasp the connector on the end of the sensor cable and pull the
connector away from the main PCB to disconnect it from the main
PCB.
10. Install the new sensor.
11. To install the LEL sensor, do the following:
Plug the replacement sensor into the sensor connector on the LEL
sensor cable.
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