Replacing Colorimeter Solenoid Valve - Blue I HydroGuard HG-302 Manual De Uso

F. Trace the wires from the Colorimeter to the control module connector.
A total of four wire pairs (2x4) are connected to the control module (4 connected to the
"MIXER" terminal block and 4 to the "SENSOR" terminal block).
G. Disconnect the Colorimeter 's wires from the Colorimeter module.
5. Connect a new Colorimeter unit:
H. Hand tighten the union between Colorimeter and the solenoid valve until the Colorimeter
is tightly connected to the valve. Check that the O-ring is still in place.
I. Screw the Colorimeter to the HydroGuard analyzing module housing with the four
mounting screws.
J. Place the top cap on the Colorimeter unit.
K. Re-connect the outlet tube to the Colorimeter.
L. Pass the wires from the new colorimeter through the gasket into the control module.
M. Connect the wires to the "MIXER" and "SENSOR" terminal blocks as indicated on the
colorimeter module.
6. Recheck all connections.
7. Close the HydroGuard analyzing module door.
8. Turn on the power and restore flow to the flow cell.
9. Confirm that the colorimeter is properly operating.

5.7.8 Replacing Colorimeter Solenoid Valve

1. Turn the water inlet and outlet to the flow cell and turn off the controller power.
2. Release the top union connecting the solenoid valve to the Colorimeter module.
3. Detach the cable from the solenoid valve.
4. Unscrew the solenoid valve intake tube.
A. Unscrew and disconnect the sampled water supply pipe from the solenoid valve intake
pipe, at the bottom of the solenoid valve.
Top Union
Solenoid Valve
Bottom Union
Solenoid Valve
Intake Pipe
Figure 21: Solenoid Valve with
5. Disconnect the valve from the unions above and below.
Colorimeter
Module
Solenoid Valve
Cable
Sampling Cell
Sampled Water
Supply Pipe
Colorimeter Module and Flow Cell
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