Dove Systems DM 1224 RM - Manual (Page 2)

1. SETUP AND CONNECTION
A) MECHANICAL INSTALLATION
Remove all packing material from the unit. Make certain that all holes are
free of obstruction on all sides of the unit. Replace all packing material in the
carton and store it for reuse.
For portable use, set the Dimmermaster on a smooth, cool surface. Up to 2
packs may be stacked vertically. Do not remove the feet when stacking. Do
not block any vent holes. Make certain that the vent holes all have at least 6
inches of free air around them. It is essential that this unit have adequate
cooling for safe, reliable performance. Maximum air temperature must not
exceed 40
E Centigrade (105 E Fahrenheit).
B) RACK MOUNTING
The Dimmermaster may be rack mounted in a standard EIA 19-inch equipment
rack. The rubber feet may be removed. Do not remove the top and bottom panels.
The Dimmermaster occupies 5.25 inches of space in the rack, or three rack units.
For best cooling, an additional 1.75 inches, or one rack unit, between packs is
recommended. The rack should be ventilated from the top at a minimum of 120
CFM.
C) ELECTRICAL INSTALLATION
The dimmer must be supplied with an amount of current equal to the combined
total current of the lamps it controls. To calculate this current, use the formula
amps = watts ÷ volts. For example, if twelve 2400-watt, 120 volt lighting units are
connected to the dimmer, it would require 28,800 ÷ 120, or 240 amps total power.
This is available from a three phase 4 wire 80 amp or a single phase 3 wire 120
amp service. Usually this much power is not required and a 40 - 60 amp service
may be used with lower power loads plugged in.
The Dimmermaster accepts either three phase or single phase power input
and is factory configured for three phase. Line to neutral voltage is always
120 volts. Line 1 to Line 2 voltage is 208 volts in three phase service and 240
volts in single phase service. It is very important that the input voltages be
checked with a meter to insure that they are correct. A mistake can place 208
to 240 volts across a 120 volt lamp. The breakers will protect the unit but
may not save the lamps. A double check of voltages before applying power
can guard against such disaster.
The power input connector is a terminal block. Each leg of the power feed
connects to one terminal on the dimmer pack. These are marked "L1", "L2",
and "L3". The neutral connection is made on the neutral bar, just to the left
of the power block. The ground connection is made on the ground terminal,
just to the right of the power block. The pack has circuit breakers to protect
each dimmer channel, but the primary circuit protection and disconnect is to
be provided by the user.
When single phase service is used switch S2, located near the center of the
board, must be moved from the "3 phase" position to the 1 phase4" position.
The power input terminal marked "L3" is not used. The two blue wires wrapped
with red tape must be moved to the terminal marked "L1" and the two wrapped
with black tape to "L2". The tiny blue wire stays in terminal "L3". Please refer to
the diagrams at the rear of this manual.
D) GROUNDING
The term GROUNDING refers to a separate wire with green insulation which
is connected from the equipment case to earth ground (often through a properly
grounded conduit system). This is not the same as the neutral or common and
must not be confused with them. The neutral is a separate, load-carrying circuit
conductor. The ground conductor should not normally carry current.
When the Dimmermaster is connected to its power source by a flexible rubber
cable, the ground connection is made through a wire in the cable. For maximum
safety and to comply with electrical codes, this connection must be made. Cables
supplied by Dove Systems are pre-wired for this connection and include the
necessary green wire. Be sure this is firmly bonded to a ground connection box,
a cold water pipe, or a known earth ground.
When the Dimmermaster is connected to its power source by conduit, the
ground connection can be made via the conduit itself. If flexible conduit is
used, a separate bonding conductor will usually be required. Always check
your local codes for hook-up before operating this equipment. It is recommended
that power connections to the Dimmermaster be made by a qualified electrician.
E) LOAD CONNECTIONS
The dimmer pack consists of twelve dimming channels. The Dimmermaster
will dim any load from 1 watt through 2400 watts at 120 volts. The load may
be incandescent, inductive, or resistive. This includes conventional incandescent,
quartz incandescent, rain-lights, pin beams, and similar lamp loads. This does not
include fluorescent or neon lamps. Dove Systems offers a solid state transformer
to dim other types of loads, such as 12 volt MR16 lamps.
The output connectors can be U-ground receptacles, stage pin receptacles,
twist-lock receptacles (L5-20R), or a terminal block. If your unit has receptacles
installed, merely plug the load into the outlet which corresponds to the circuit you
desire to use. For terminal-block-only units, there is one lug for each output and
a neutral bar for all neutrals. Lugs are numbered according to their circuits. There
should be a separate neutral returning from each load circuit.