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2. Servicing the liquid cooling circuit
7. Uncouple the two plastic tubes.
Note: Make sure that both ends of the plastic tubes in the bottle remains immersed until the plastic tubes are uncouple from
the liquid cooling circuit.
Tip: Sometimes a little cooling liquid will be spilled. Wrap a small cloth around the valved fitting while uncoupling to absorb
the spilled cooling liquid.
8. Pressurize the liquid cooling circuit. See procedure "Pressurizing the liquid cooling circuit", page 15.
Check within 24 hours if the pressure remains 1 bar. If not, search for leakage.
2.6 Pressurizing the liquid cooling circuit
Before pressurizing the liquid cooling circuit ensure that the circuit is filled with cooling liquid and that all air
bubbles are expelled.
CAUTION: This procedure is only valid in case the liquid cooling circuit is calibrated. This means that the
pressure vessel was not subject to any modifications, i.e. releasing or increasing pressure via the valve ofthe
vessel. In case the pressure vessel was subject to modifications use the calibra
tion procedure to pressurize
the liquid cooling circuit.
WARNING: All actions performed on the liquid cooling circuit should occur in ambient conditions (25°). The
projector should have sufficiently cooled down (minimum 2 hours).
Necessary tools
• 60 cm of plastic tube with female valved fitting.
• Syringe co nnected with short t ube with male v alved fitting.
• Bottle with cooling liquid.
• Cloths.
How to pressurize the liquid cooling circuit ?
1. Fill the syringe with cooling liquid as follows:
a) Couple the female (F) fitting of a plastic tube to male (M) fitting of t
he syringe and emerge the tube end. Make sure that the
piston of the syringe is completely pressed in.
b) Extract cooling liquid into the syringe by pulling out the piston.
c) Turn the syringe upside dow n, so that the air inside the syringe i
s located at the outlet.
d) Push the piston in until allair bubbles inside the syringe and tubes are expelled. Ensure thatthe tube end in the bottle remains
immersed.
e) Pull out the piston to fill the tubes and syringe completely with c
ooling liquid.
f) Disconnect the filled syringe from the tube.
R59770032 COOLING LIQUID REFURBISHMENT 07/12/2006
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