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Cleaning or Replacing the Small Water Filter (continued)
6. Reattach the water tank top cover using the two thumb screws.
Replacing the Ion Exchange Resin Cartridge and the Coolant Water.
To replace the ion exchange resin cartridge and the deionized or steam-distilled water:
1. Remove the thumb screw on the drain pipe clamp in the front of the D.I. water
tank. Remove the cap on the end of the drain pipe and drain the D.I. water from
the tank by rotating the flexible drain pipe tube until the outlet end is below the
inlet end. Water may be drained into a shallow pan, or floor drain system.
2. Remove the lid of the D.I.
water tank by removing two
thumb screws. Refer to Figure
7-3. Using the special tool for
the ion exchange resin
cartridge, turn the cartridge in
the tank counter-clockwise to
remove the cartridge. Discard
the cartridge.
3. Remove the small water filter located
behind the resin cartridge. This filter
may be removed more easily if it is
twisted while it is being pulled upward.
4. If this filter is to be retained, clean off the dirt in the mesh with a soft brush. Otherwise,
discard this filter.
5. If retaining the water filter, reinstall it. Otherwise, install a new filter. Insert the
filter until it is fully seated on the bottom post.
6. Insert a new ion exchange resin cartridge in the water tank by turning it clockwise
using the special tool. Stop turning the cartridge when it becomes slightly hard to
turn. CAUTION: Do not over tighten the cartridge. Over tightening may
damage the threads.
7. Reinstall the drain pipe and its cap, then fill the tank with deionized or steam-
distilled water up to the upper level mark.
8. Reattach the water tank top cover using the two thumb screws.
990-605 REV B: May, 1997
LW250 PULSED Nd: YAG LASER
CHAPTER 7: USER MAINTENANCE
Figure 7-3. Ion Exchange Resin Cartridge
Removal
GLVTOOL.PCX
7-4
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