Film-Tech Forum ARCHIVE: Christie cp2000zx, sb observed operating temps.

This is topic Christie cp2000zx, sb observed operating temps. in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

To visit this topic, use this URL:
https://ft-forum.com/ft/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=16;t=000427

Posted by John Henry (Member # 3084) on 08-27-2009, 05:42 PM:

Hello all, Just started running D-Cinema for the past month. I was needing to know what the observed operating temp are...I know what the accepted guidelines are from the Christie manual, I need to know because our installer says we need more airflow in the exhaust system, yet he did not have an airflow meter to check, he says that Christie may not warranty a malfunctions...BTW we are running in the posted normal operating temps.

Thanks for any input

Posted by Demetris Thoupis (Member # 833) on 08-27-2009, 05:48 PM:

if your exhaust system does not exhaust as "fast" as it should be, you might have premature bulb failures or even worse mirror damage. What is the power of your main exhaust fan? Are you using one exhaust at the projector end and one elsewhere?
Demetris

Posted by Mark Gulbrandsen (Member # 72) on 08-27-2009, 07:37 PM:

If you go with at least the reccomended air flow you are fine. It should be verifiable. Your lamp AND projector warranty will be in effect and they can't cite you for too little airflow. If you are running a 3kw lamp I still prefer 1000cfm. Things are alot happier at that CFM. I also reccomend FanTech in line turbine exhaust blowers.

Mark

Posted by Monte L Fullmer (Member # 2797) on 08-27-2009, 09:28 PM:

Yea, you want to definitely have plenty of exhaust for them things.

You got a very expensive glass mirror in them things along with other components that will suffer if a bulb decides on blowing (why you follow bulb changeout requirements to the letter when running digital..) due to lack of exhaust or hours over warranty.

-Monte

Posted by Mark Gulbrandsen (Member # 72) on 08-28-2009, 07:10 AM:

I forgot to mention that calling in a qualified HVAC person with a proper air flow meter can be a wise investment... Granted you're not seeing any red lights on the TPC indicating problems but you may still have too little airflow. One of the major faults today is that these projectors lack a decent airflow sensor. Instead of the cheapy little switch they are using a real airflow sensor that compares airflow based on stack vaccum vs. the size of the lamp entered into the set up info should really be incorporated. With digital better to be safe than $10,000.00 sorry!!!

Mark

Posted by Jeremy Weigel (Member # 4208) on 08-31-2009, 03:46 PM:

When we installed ours, I called our HVAC tech and gave them the cfm specs in the manual. I initially told them 600cfm minimum on an 8" duct, not realizing that 600cfm was for high altitude, so that's what he used as a guide when selecting updraft rooftop blower. He also calculated on 20' duct length and it is actually between 5' and 10'. Anyway, after all was said and done we ended up with an average 800cfm. Keepin' 'em nice and cool. [Cool]