Cooling; Light Engine Area Cooling (Front Of Projector); Power And Lamp Requirements; Lamp Area - Christie CP4230 Service Manual

1.2

Cooling

1.2.1 Light Engine Area Cooling (Front of Projector)

• Primary Air Intake (Fans 5,6,7,8): The four intake fans, located on the right-hand side of the projector
pull air through the high-efficiency filter before flowing across the critical components in the light engine
area.
• Cardcage (Fan 1,2 exhaust) (Fan 9,10 intake): The cardcage is outfitted with two exhaust fans at the
bottom and two additional intake fans at the top.
• Laminar Airflow Device (Fan 4): Mounted to the light engine handle, the Laminar Airflow Device
(LAD) fan is mounted with its own filter and is responsible for circulating a separate supply of dust-free
laminar (low-turbulence) airflow via tubing routed to each DMD aperture. The LAD air is drawn from the
filtered air in the light engine area, thus it is double-filtered for use at the DMDs.
• Liquid Cooling: The liquid cooling system is the primary method for cooling the light engine DMDs. This
system consists of small copper water blocks screwed to the three DMD mounting studs and daisy-chained
together with PVC flexible tubing. Both ends of the chain connect to quick disconnect couplings located
on the firewall between the IOS and light engine compartments, forming the cool "source" and warm
"return" lines with the liquid cooler heat exchanger and pump. This liquid cooling loop circulates Christie
approved coolant - JEFFCOOL E105. The level of fluid in the reservoir can only be seen if the projector
top lid is opened.
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Power and Lamp Requirements

The universal lamp power supply (LPS) in the CP4230 offers adjustable lamp power to suit the size of lamp
currently in use. Software allows each lamp to be over-driven by approximately 10% of its maximum rating.
The CP4230 accommodates different lamps. Refer to

1.3.1 Lamp Area

The lamp and its dual reflectors, both located in the segregated lamp compartment, are the primary heat
sources for the projector. Cooling for these components originates from a high-efficiency lamp blower. Its
large output duct directs air axially along the lamp and between the rear reflector and its similarly shaped heat
shield. As part of this system, an external heat extraction fan must be added to generate and maintain the
required minimum airflow at the exhaust opening located at the top of the projection head. The required
minimum airflow for the 2KW and 3kW lamps is 450 CFM, and for the 4.5kW and 6kW lamps it is 600 CFM.
This exhaust must vent to the outside of the building at every site. Two vane switches - one at the blower
intake and one at the exhaust opening monitor airflow, providing interlocks for safe operation of the projector.
If a switch opens due to inadequate airflow, the lamp will shut OFF and a red alarm window will appear on the
TPC. NOTE: Cooling in the rear of the projection head does not require filtered air.

1.3.2 7kW Lamp Power Supply (LPS)

• DO NOT connect the lamp power supply to AC until it is first connected to the projector.
• Certified electrician required.
CP4230 Service Manual
020-100622-04 Rev. 1 (05-2016)
Section 9.7 Lamp for a complete list of supported
Section 1: Introduction
lamps.
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