CHAPTER 7: USER MAINTENANCE
LW250 PULSED Nd: YAG LASER
990-605 REV B: May, 1997
7-6
L25PUMP.WPG
Figure 7-5. Pump Hose
Connections
Coolant Water Draining: For Long Term Storage; When Transporting the
Laser; or When Temperature Drops Below 0
o
C.
When the laser is not used for a long
period, when the laser is to be transported, or when the ambient temperature will drop below 0
o
C, the cooling system water must be completely drained. Note that transporting the laser by air
or truck may subject it to freezing temperatures. To completely drain the cooling system water:
1. Refer to Figure 7-4. Loosen the stopper bolt in the laser chamber water drain hole.
Breaking the vacuum will allow the water in the laser chamber and its hose to
drain into the water tank.
2. Refer to Figure 7-2. Remove the thumb screw on the drain pipe clamp. Remove the drain
pipe cap. Rotate the flexible drain pipe tube until the outlet end is below the inlet end to
drain the water into a shallow pan, or floor drain system.
3. Remove the two thumb screws on the water tank cover, and remove the cover.
4. Refer to Figure 7-3. Using the special tool for the ion exchange resin cartridge,
turn the cartridge in the water tank counter-clockwise and remove the cartridge.
Store the cartridge in a sealed plastic bag or container in a cool dark place to
avoiding dryness and freezing temperatures.
5. Refer to Figure 7-1. Remove the four Phillips head screws from the side panel air
filter, then remove the air filter to gain access to the pump.
6. Refer to Figure 7-5. Remove the clamp on the
outlet hose, then remove the hose end by lightly
turning the end with a pair of pliers.
CAUTION:
When compressed
air is sent to the water tank while
the lid is on, the tank may burst.
Be sure the tank lid is removed
prior to performing the next
steps.
7. Use clean compressed air, at 30 psi
maximum pressure, to blow out any
remaining coolant water in the outlet
hose.
8. Blow air into the outlet hose connection
joint to remove residual water in the
tank.
9. When the water is completely drained,
reconnect the outlet hose to the pump.
