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Author Topic: christie DCD-224 series dimmer instalation manual Mike Moreno Expert Film Handler Posts: 200 From: culiacan sinaloa mexico Registered: Jul 2008 posted 09-18-2015 09:17 PM                        Hi guys. i´m having problems on one christie dcd dimmer, i can´t make it to dim and right now we have to turn on and off the breaker. i´m not sure if is broken or just loose the programing but i cant find the installation manual and is not on the manuals site. can you guys can send me or tell me were do i can find it? thanks a lot for your help miguel moreno mexico  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 09-20-2015 09:51 AM                     Sounds like a shorted triac. This is not uncommon especially when people change light bulbs with the power turned on. If a socket breaks that's when the triac shorts out. Not an expensive part and if it's easily accessible you can swap one over from another unit to make the test. Mark  |  IP: Logged Buck Wilson Jedi Master Film Handler Posts: 894 From: St. Joseph MO, USA Registered: Sep 2010 posted 09-20-2015 08:20 PM                     You shouldn't change bulbs on a dimmer circuit with the lights on? I hadn't heard that.  |  IP: Logged Jim Cassedy Phenomenal Film Handler Posts: 1661 From: San Francisco, CA Registered: Dec 2006 posted 09-20-2015 10:03 PM                     quote: Buck Wilson You shouldn't change bulbs on a dimmer circuit with the lights on? I think what Mark meant, if you re-read his reply, is that if the bulb socket should break and short out, you'll fry the triac. So, turning the power off when changing the bulb is the old "ounce of prevention" theory. I've seen theater bulbs get broken off in sockets when using one of those long bulb-changing poles. (OK, I'll admit I've probably broken one or two myself) so turning the power off is an easy way prevent having to change out a triac.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 09-21-2015 07:33 PM                     Exactly! Have a bypass switch installed so the dimmer is OUT of the circuit!! Mark  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 09-22-2015 08:35 AM                        Then, go into bypass when power is applied until you know all is well. I've installed nearly 1000 Kelmar dimmers, also with triac. I ALWAYS jump the input to output with a heavy #12 wire until late on opening day. This saves the triac when unexpected changes are made (curtain guy wiggles the light fixture, electrician adds expansion rings, etc.)  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 09-22-2015 09:28 AM                     The Kelmar dimmers ship with jumper wires in place (and tagged) for exactly this purpose and I always lay the law down with the electricians about not removing them. Like Louis, I don't pull those off until maybe 2 days prior to opening.  |  IP: Logged Jim Cassedy Phenomenal Film Handler Posts: 1661 From: San Francisco, CA Registered: Dec 2006 posted 09-22-2015 10:57 AM                     quote: Louis Bornwasser I ALWAYS jump the input to output with a heavy #12 wire until late on opening day. This saves the triac when unexpected changes are made (curtain guy wiggles the light fixture, electrician adds expansion rings, etc.) WoW- Excellent idea. So simple I'm surprised I didn't think of it. ! LoL I rarely get involved with installations anymore, but if I ever do, I'll remember this 'trick'.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 09-22-2015 12:48 PM                     Also... Kelmar dimmers no longer have to be fed from the same phase like they had to be in the past to prevent the possibility of flicker. Each channel now has it's own independent power transformer. Mark  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 09-22-2015 03:00 PM                        The jumper is there on the Kelmar because I, personally, required them to be shipped that way. Solved the problem, too. Now all of them get it.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 09-22-2015 04:54 PM                     From day one the Ash TEC8112 dimmers were shipped with a jumper in place  |  IP: Logged

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