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Author Topic: Exaust fan. How important? Derrick Huggins Film Handler Posts: 27 From: Gotham City Registered: Feb 2008 posted 04-27-2008 07:02 PM                    i Am currently running with cristie lamp houses. the projector is century. The projector has a water cooling system, however the owner refuses to use it, because of the water bill. and the exaust fan going out from the lamphouse has not been working for some time. it is EXTREMELY HOT when i have to thread for the next shows. i was curious, as i have tried to get the owner to get us a new exaust fan, but he says it isnt important. how much about in parts and labor would an exaust fan cost? and what are the dangers/ problems that can occur with absoulutely no air running through the lamphouse? i believe we use 4k watt xenon bulbs. and has anyone else ever encountered such cheap theater owners?  |  IP: Logged Scott McGuire Film Handler Posts: 94 From: Elmira, NY/United States Registered: Oct 2007 posted 04-27-2008 07:12 PM                     No exaust fan running will void the waranty on on most xeonon bulbs, i bet a new fan is cheaper than a new bulb.  |  IP: Logged Derrick Huggins Film Handler Posts: 27 From: Gotham City Registered: Feb 2008 posted 04-27-2008 07:19 PM                    Surpisingly, the bulbs last fairly long. (8-15 months) The bulb hour timer has long been broken, so hard to if the bulb hours go past the warranty on them, but we only replace bulbs if either A: the bulb blew up, or B: The screen is so black that nobody will be able to sit through the show.My concern was if the intermittent could get warped from the heat, or the lens perhaps go bad? every single piece of that equipment is scorching hot. i have burned my hands several times.  |  IP: Logged Jeremy Weigel Phenomenal Film Handler Posts: 1062 From: Edmond, OK, USA Registered: Mar 2007 posted 04-27-2008 07:36 PM                     quote: Derrick Huggins we only replace bulbs if either A: the bulb blew up, or B: The screen is so black that nobody will be able to sit through the show. The cost of replacing the reflector alone (if its being replaced at all) is more than replacing the fan motor.  |  IP: Logged Tim Reed Better Projection Pays Posts: 5246 From: Northampton, PA Registered: Sep 1999 posted 04-27-2008 08:00 PM                       I bet I know who you're working for. Understand the exhaust fan and lamphouse blowers are two different things. The exhaust fan is external to the console, usually mounted on the roof, and draws the heat away from the equipment. The lamphouse blower(s) keep air flowing over and around the bulb. Depending on what flavor of Christie console you have: Dayton 4C446 blower (or whatever number the maintenance-free replacement is for that now, I can't remember)= about $50 from Graingers. It installs like it looks, four screws, two wires... simple.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 04-27-2008 08:29 PM                        Century has always taken the position that water cooled machines must have water AT ANY POWER LEVEL of bulb. You have options (1) convert to an air cooled gate (2) purchase a water circulator. I assume you are 2000 watts or lower so air cooled is OK. 3000 watt up needs water. Most building codes REQUIRE proper blowers and exhaust. It is the minimum the owner owes you: proper working conditions. Louis  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 04-27-2008 08:48 PM                     But Louis, we're dealing with the uber stupid here. quote: Derrick Huggins The projector has a water cooling system, however the owner refuses to use it, because of the water bill.  |  IP: Logged Joe Redifer You need a beating today Posts: 12859 From: Denver, Colorado Registered: May 99 posted 04-27-2008 10:21 PM                        I can understand the situation from owner's perspective. Those Century's use a lot of water and he doesn't want to be responsible for a water shortage, and surely he is just trying to save our wonderful planet. By not repairing the blower fans he is going green... green with a few extra dollars he is saving. What a great guy! I bet he has many friends and I'm sure lots of people admire this clearly wonderful individual. Derrick, your owner is a cheap assfuck. I bet he is ugly and I am 100% confident he smells like unwiped anus. You can quote me on that. Print this out and show him. His wrath is not something I fear. He seems weak. I also bet he has a really small dick on the underside of an inch.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 04-28-2008 06:38 AM                     A water cooled gate doesn't have to be connected to the mains (in fact it is better off not done that way but with distilled water and a circulator) If one is on a tight budget (frugal cheapskate) then get a garbage pail and a lawn fountain pump and connect that up  |  IP: Logged Jim Bedford Jedi Master Film Handler Posts: 597 From: Telluride, CO, USA (733 mi. WNW of Rockwall, TX but it seems much, much longer) Registered: Jun 99 posted 04-28-2008 07:18 AM                        "Cheapskate" and "uber stupid" just don't do this guy justice. We pay about $3.25 for 1000 gallons of water here. At that price ten gallons of water in a closed circulating system would cost the owner 3.5 CENTS!! Could it be he doesn't drive his car because it wears out his tires and mileage on the speedometer reduces the Blue Book value? 'Nother thing about those pesky fans. They exhaust the ozone created by the lamp. Health effects of ozone Fans are much cheaper than negligence lawsuits, both to fight and pay off.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 04-28-2008 08:04 AM                     We can't blame this guy... he knows this is wrong... but we can blame his boss! If thats the 4000 watt Christie SLC40 console you've got there NOT runing the exhaust blower will bake the coating off the mirror... if that already hasn't happened. It will also happen if you're runnign a 3kw lamp but it'll take a little longer. A new reflector for that lamphouse costs nearly $2,000.00, the lamp warranty will also be void as the manufacturer can tell from exammining it what temperature the lamp was operating at. You don't hook your water cooling jacket on the projector to the main water line you use a water circulator. Not hooking a Century water jacket to something with cooling fluid going through it can eventually cause the dovetail in the projector to warp... its made of copper...very soft! Coolant should be distilled water and at least some ethelene glycol mixed in... anout 20% in your area should work good. Don't use the cheap anti-fereeze from Wal-MArt either... it'll grow fungus at a fast rate and plug up the coolant lines! I just rebuilt an SLC40 console last week that came in from Portland, OR. for an upcomming plex install we have next month... its mirror coating was baked off... also replaced the airflow switch in the stack and all the cable ties with black IR and UV resistant ones . Heat and dichroic mirrors don't mix along very well. At least 1200cfm exhaust for a 2kw, and 1500cfm or more for a larger lamp is adaquate. Tell your boss that we all think he's an iddiot . Re: Your wanted ad for Ultimations... This is still being currently produced by EPRAD so good luck gettingn one cheap... it is one of the best of the computerized automations though. Much better than the CNA versions they build for Strong. P.S. Tim, You can't use that dayton blower in the SLC series consoles... it requires a 3600rpm plenum blower which is only available from Christie. Its the 3600 rpm blower thats part of the secret to long lamp life in these consoles... no one else I know of uses a blower moving that much air. The nice thing about the current blower from Christie is that the motor is ball bearing! No more crappy Dayton motors to replace... Mark  |  IP: Logged Sean McKinnon Phenomenal Film Handler Posts: 1712 From: Peabody Massachusetts Registered: Sep 2000 posted 04-28-2008 10:33 AM                        quote: Exaust fan. How important? Very. Not to just repeat what everyone else said but this is a really stupid and shortsighted way to save money. Not only will you go through lamps like crazy, you will destroy your reflector as well as the rest of your lamphouse. As to the water cooling how cheap can you be? A traschcan filled with distilled water and ethelene really cheap. This guy sounds like "Theatre Ownership Done WRONG!" and it's people like this that cause the industry to lose customers. Pathetic. I bet he drives a very expensive car though, right?  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 04-28-2008 10:35 AM                       Sean You nailed it. There are so many of these, it's stereotype.  |  IP: Logged Chris Slycord Film God Posts: 2986 From: 퍼항시, 경상푹도, South Korea Registered: Mar 2007 posted 04-28-2008 11:17 AM                     You seem to not care that you only replace your bulbs when the image is too black to see an image. So while your boss sucks... you seem to be helping him along quite well.  |  IP: Logged Danial Simmonds Expert Film Handler Posts: 107 From: Kota Damansara, Selangor, Malaysia Registered: Jan 2008 posted 04-28-2008 11:18 AM                        My principal of working with Christie console is that no exhaust fan then you cant show a movie... it will most likely cause damage to the internal lamphouse blower fan slc and reflector. Most probably cause your xenon lamp to blow also... Air extraction is very important! If you need the requirements contact your service agent or go and lookup a Christie manual! I never came across any cinema operator that said exhaust fan isn't important... But going green by cutting off all the projector necessities, Better just PLUG OFF THE POWER!  |  IP: Logged

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