Watts HF scientific 28030, Owner'S Manual

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CLX-XT (28652) Page 31
REV 5 (5/2020)
INLET OUTLET
FLOW 
CHECK VALVE DETAIL
After a PRIME the CLX-XT will perform a water calibration (WCAL). It will take a
few minutes to complete this procedure.
*The 1 year buffer and 90 day indicator reagent life is primarily used on ballast water
applications. The assumption is based on the factory default of a 60 second cycle and up
to 24 hours total operation per month.
Pump Tubing Replacement
The black pump tubes may need replacement more often due to the fact that they are
subject to wear. The inline check valves should not need to be replaced and should be
saved. Please note that the check valves are directional as shown below.
Steps:
1 Flush the system as described above to reduce personal contact with the reagents.
2 Press SERVICE to stop the flow of sample water and drain the cuvette.
3 Remove and retain the thumb screw on top of the pump; pull the pump hammer and
spring up and out of the way. There is no need to completely remove the hammer and
spring.
4 Working on one reagent side at a time. Replace the black tubing between optics inlet
and the check valve OUTLET. Discard the old tubing.
5 Ensure the check valve is placed into its seat.
6 Repeat steps 4 & 5 for the other reagent.
7 Replace the hammer and spring back into place and secure with the thumb screw.
8 Check the drawing on the following page to ensure correct installation.
9 Return to operation as described.
Cap Assembly Replacement
When the Cap Assemblies needs to be changed follow the procedure shown below. It is
recommended that both assemblies are changed at the same time.
Steps:
1 Flush the system as described above to reduce personal contact with the reagents.
2 Press SERVICE to stop the flow of sample water and drain the cuvette.
3 Remove the buffer cap assembly from the cabinet vent and the connection at the check
valve.
4 Replace the buffer cap (blue or black cap) assembly. Note that the vent tube is not
centered and does not connect to the suction tube.
5 Repeat steps 3 & 4 for the indicator side (white cap).
6
Replace reagents, prime and return to service.