YOKOGAWA EXA TB TB400G, User Manual

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<7. MAINTENANCE>
7-11
IM 12E04A02-02E 9th Edition : Mar. 16, 2018-00
7.9 Replacement of Filter (for "zero water")
If the filter employs an element for "zero water", replace it periodically.
(1) Select the <MAINT.> mode.
(2) Shut valves V2 and V3.
(3) Turn the filter case to remove it. (Exercise care because water inside the case may spill out).
(4) Wipe the inside wall of the case with a brush or the like if it is dirty.
(5) Replace the filter element with a new one.
(6) Reassemble the filter in the reverse order of disassembly.
In this case, be sure that the O-ring for preventing water leakage is not damaged.
(7) Open valves V2 and V3, let "zero water" flow and check whether or not any water leaks out.
(8) Loosen the knob of the air vent at the top of the filter and vent the air until tap water begins
to leak out. After the air venting is completed, tighten the knob.
(9) Allow water the flow for 20 minutes or more run-in the filter.
(10) Finished.
Note: If the zero filter is not to be used for a prolonged time, remote the filter and dry and store it in a dry place.
O-ring
Knob of the air vent
Filter element
Case
Turn to remove.
F0706.ai
Figure 7.5 Replacement of Zero Filter