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< 8. Maintenance >
8-4
IM 12F5A1-01E
8.1.4 Replacement of Activated Charcoal Filter
(1) Close BV1 and BV2, then rotate filter case to remove (see Figure 8.4).
(2) Clean inside of case with brush or the like.
(3) As illustrated in Figure, replace filter with new one.
(4) Reassemble using the reverse procedure, then open BV3 and BV1 to pass water through
filter. Check that there are no water leaks from filter and piping, and no
bubbles in drain water.
(5) Operate for about 20 min. then confirm that free available chlorine analyzer reading is near
zero.
(6) Close BV3 and open BV2 ball valve.
Lid
(held in place by piping)
Spacer
Filter (activated charcoal)
Filter case
Turn
Figure 8.4 Replacing Activated Charcoal Filter
8.2 Checking the Electrode Mechanism Block,
and Replacing Damaged Parts
Detector electrode parts such as the motor assembly and driven shaft assembly have finite life.
If conditions of use or environment are outside of specifications, their life may be shorter than
would otherwise be expected.
Periodically check whether electrode mechanism block is operating normally. To check if
abnormal or not, refer to “Main Check List”; for a simple check whether calibration and the like is
abnormal, refer to “Auxiliary Check List”. Alternate these checks for best results.
When such parts that are subject to aging have been operated for their “recommended lifetime”,
it is recommended that you replace them even if you feel that there is still life left in them.
Table 8.2 shows a list of parts that we recommend you to periodically check and replace.
Table 8.2 Parts recommended for periodic checks and replacement
Part Recommended check
interval
Recommended
replacement interval
Rotating contact � * 1 year operation
Drive belt 6 months (sub; 3 months.) 3 years operation
Driven shaft assembly 6 months (sub; 3 months.) 3 years operation
Motor Assembly / gear head 6 months (sub; 3 months.) 3 years operation
*: Rotating contact does not require inspection.