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A number of problems have been reported regarding the power wiring to the SMART DIM 3K Light Dimmers.
These wiring problems have resulted in erratic operation of the dimmers. It is very important to properly wire
the SMART DIM 3K Light Dimmers to achieve the best results. In addition, it is important that other peripheral
equipment is correctly wired to minimize the possibility of interference which might cause the dimmers to op-
erate incorrectly. Slide projectors, in particular, have been troublesome as there are severe line spikes, surges,
or other interference every time the projector cycles to a new slide.
There are several wiring problems which have been reported by installers which if corrected should make the
light dimmers much more stable. SCR or Triac-type dimmers, of which the majority on the market are based,
are susceptible to spikes and surges on the AC line which can cause instability which is sometimes manifest as
flashing of lights or momentary loss of lights.
The diagram on the second page shows some of the wiring considerations which should be included in a cor-
rectly wired dimming circuit. Please follow the practices shown in this diagram.
The following problems have been reported and should be corrected:
Slide Projector wiring problems
In systems that use SMART Showmation automation systems, the slide projector power is normally switched by
a relay on the automation. In many cases, the
neutral is connected to the relay instead of the hot wire, There-
fore, the neutral is being switched. This is not good practice. It may or may not make a difference in the opera-
tion, but it is unsafe practice to switch neutral instead of hot.
The slide projector is sometimes wired to the same phase as the light dimmers. Instead, wire the slide projector
to a different phase than the phase to which dimmers are wired. There are many systems that use the console
as a distribution point for the 3-phase booth power. Usually the sound is on the L1 phase, the dimmers are on
the L2 phase, and the projector motor and control circuitry is on the L3 phase. Wire the slide projector to the
phase with the motor on it (usually L3). This will help to isolate the spikes from the dimming circuits.
Dimmer wiring problems: (See diagram on Page 2)
Dont daisy chain neutrals from one dimmer to the next in a multi-dimmer system. Instead, run a separate neu-
tral from each dimmer back to the console neutral buss terminals.
Run the load neutrals all the way back to the dimmers if possible. It may be OK to connect the load neutrals to
the console neutral buss terminals, but the preferred way is to connect the load neutrals to the dimmers neu-
tral terminal.
And finally, Grounding:
Verify that the power distribution ground connection inside the console has been properly made with no paint
at the point of connection (should be metal to metal). Make sure the connection is tight and secure. A poor
ground can cause more different kinds of trouble than you want.
Call 1-800-457-6278 if you have questions or problems. ) L H O G  6 H U Y L F H  % X O O H W L Q
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