Replacing The Temperature Probe; Replacing Flow Switch; Replacing Reagent Siphons; Replacing The Sensor - Blue I HydroGuard HG-302 Manual De Uso

5.7.2 Replacing the Temperature Probe

1. Turn off the inlet and outlet water to the flow cell and the power to the controller.
2. Open the doors of both the analyzing module and the control module.
3. Remove the four (4) wires from the temperature prove in the control module.
4. Remove old sensor from reading cell:
A. Unscrew the compression fitting from the temperature prove
B. Pull the probe up until it clears the fitting.
5. Install new sensor:
A. Insert the temperature probe into the fitting
B. Screw the compression fitting around the probe.

5.7.3 Replacing Flow Switch

1. Turn off the inlet and outlet water to the flow cell and the power to the controller.
2. Open the doors of both the analyzing module and the control module.
3. Locate the flow switch attached to the flow celll.
4. Disconnect the flow switch wires from the I/O module.
5. Remove the inlet connection to the old flow switch.
6. Remove the flow switch from the flow cell.
7. Pull the flow switch wires gently to completely remove from the controller
8. Insert the new flow switch on the flow cell
9. Insert the inlet connection on the flow switch
10. Route the flow switch wires back to the connection on the I/O module and connect the wires to
points 3 and 4 on the input switch terminal block.
11. Close the controller doors and turn on the water and power and ensure proper operation.

5.7.4 Replacing Reagent Siphons

1. Turn the power off to the controller.
2. Disconnect the two (2) red wires from the reagent level connector on the colorimetric
module.
3. Remove the four (4) mounting screws.
4. Install the new reagent siphons.
A. Attach the four (4) mounting screws
B. Connect the two (2) red wires to the colorimetric module.

5.7.5 Replacing the sensor

1. Turn the power off to the controller.
2. Disconnect the two (2) red wires from the reagent level connector on the colorimetric
module.
3. Unscrew the old sensor by hand and pull out the sensor along with its 2 red wires.
4. Install the new sensor by first pushing the 2 red wires into the sensor tube.
5. Screw in the sensor by hand.
6. Reconnect the 2 red wires to the colorimetric module.
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