Leviton MRIDC User manual

IMPORTANT - SAVE THESE INSTRUCTIONS
PLEASE READ THIS MANUAL BEFORE USING EQUIPMENT
PART # 110494
MRIDC LIGHTING UNIT
OWNERS MANUAL
Leviton Lighting Management Systems
Manufactured by:
for MRI Room Lighting Applications

CONTENTS
TABLE OF CONTENTS
RECEIVING THE MRIDC DIMMER ..................................................................................................................6
INSPECTION ....................................................................................................................................................6
STORAGE.........................................................................................................................................................6
REMOVING THE MRIDC DIMMER FROM THE SKID .....................................................................................6
GENERAL DESCRIPTION / SAFETY PRECAUTIONS ...................................................................................7
PRELIMINARY INSTALLATION .......................................................................................................................8
CABINET DIMENSIONS, CLEARANCESAND WEIGHTS................................................................................9
INSTALLATION .........................................................................................................................................10-11
DIMMER SWITCH INSTALLATION ...........................................................................................................12-13
SET - UP .........................................................................................................................................................14
START UP AND OPERATION ........................................................................................................................15
PREVENTIVEMAINTENANCE ................................................................................................................................16
TROUBLESHOOTING....................................................................................................................................17
COMPONENT DESCRIPTION .......................................................................................................................18
SPECIFICATIONS......................................................................................................................................................19
WARRANTY..........................................................................................................................................20
APPENDIXA..............................................................................................................................................................21
CABINETOUTLINE....................................................................................................................................................22
COMPONENT LOCATION DIAGRAM..................................................................................................23
CIRCUIT DIAGRAMS...........................................................................................................................24-27
SYMBOLS................................................................................................................................................28
NOTES.......................................................................................................................29

Page 6
REMOVING THE MRIDC DIMMER FROM THE PALLET (if applicable)
Please take special care when removing the unit from the pallet and/or container. Proper equipment must be
used when lifting and moving. Safety precautions should be taken. Larger sizes should be lifted with a pallet jack
or a fork lift.
When removing the MRIDC Dimmer from the pallet and/or container, be sure to take proper safety precautions.
Serious injury and/or unit damage can result from not taking proper precautions.
INSPECTING THE MRIDC DIMMER
Upon receipt of the unit, visually inspect for shipping damage. If any damage is found, the Purchaser must
contact the Carrier immediately and file a shipping damage claim.
If any damage has occurred that could affect the operation of the unit, please contact Leviton Lighting
Management Systems.
Leviton Technical Support 1-800-959-6004.
STORING
If it is necessary to store the unit for a period of time before it is installed, be sure to place the unit in a clean, dry
area. To prevent excessive dust from accumulating on the unit, it is advisable to protect it by replacing it in the
original container (if possible). If the original container is not available it is recommended that all openings that
lead internally into unit are covered so that dust, water or any other substance cannot enter inside the system.
The unit must be handled at all times with the same care you would give to any piece of precision industrial
equipment.
RECEIVING & INSPECTING THE UNIT

Page 7
GENERAL DESCRIPTION
GENERAL DESCRIPTION / SAFETY PRECAUTIONS
****** WARNING ******
THERE ARE DANGEROUSLY HIGH VOLTAGES PRESENT WITHIN THE
ENCLOSURE OF THE POWER SUPPLY SYSTEM. CAUTION MUST BE
TAKEN WHEN WORKING WITH THE SYSTEM. IT IS RECOMMENDED
THAT ALL WORK BE PERFORMED BY QUALIFIED ELECTRICAL
PERSONNEL ONLY.
SAFETY
In simple easy terms, the MRIDC Dimmer converts (AC) Alternating Current to (DC) Direct Current. The DC is
filtered (conditioned) to have lowAC ripple (a by-product of the conversion) for smooth DC power to the MRI room
lights. The level of DC voltage applied to the lights is controlled by the Transformer tap selection and the Dimmer
switch (supplied with the MRIDC Dimmer). The Dimmer switch provides “phase control” for the MRIDC Dimmer.
Low-level Electro-magnetic interference and low-frequency light flutter normally associated by the use ofAC power
is eliminated. Higher quality imaging is possible with the reduced chance of electrical interference to intercoms,
nurse call and fire alarm systems. Compromise of the RF shield is eliminated.
The MRIDC Dimmer device is very safe in terms of operational and personnel safety. All components are provided
in a NEMA 1 type industrial enclosure that requires a hand tool to open. Internal voltages are 170 volts or less.
Line and load overload protective devices are used for complete protection of the MRIDC Dimmer.

Page 8
PRELIMINARY INSTALLATION
Selecting a Location
The MRIDC Dimmer is provided in a steel enclosure suitable for mounting to a wall, the side of any existing
equipment or Unistrut®type mounting channel. The MRIDC Dimmer should be located in an area suitable for
unobstructed convection ventilation (typically utility room). Allow 3 feet in front of the MRIDC Dimmer for easy
accessibility and 4 inches on each side for ventilation. The MRIDC Dimmer is designed for vertical mounting.
All wiring to the MRIDC Dimmer should be performed by a qualified electrician. Only use copper type wiring of
suitable ampacity rating. Install according to NEC and Local codes. Refer to “Appendix A - Component Location
Diagram and Circuit Diagram” for connection points.
Installation Considerations
Prior to installing the MRIDC Dimmer, be sure to take into consideration the site you have selected. The MRIDC
Dimmer can produce heat and therefore require ventilation as well as accessibility. Consider these factors.
•Ventilation
•Weight Load
•Audible Noise Requirements
•Clean Environment
•Proper Ground Techniques
•Input Source Voltage
•Distribution of Power
•Room Temperature
•Clearances
•Accessibility

Page 9
CABINET DIMENSIONS, CLEARANCES AND WEIGHTS
SIZE Weight Dimensions
(DC Watts) (Lbs) H W D
600 77 24" x 20" x 10"
1200 82 24" x 20" x 10"
2000 137 24" x 20" x 10"
3000 175 24" x 20" x 10"
20.000
24.000
18.000
Ø 0.437 MOUNTING HOLES
22.500 21.500
10.000
24.000
LIFT OFF PANEL
INDICATOR
LIGHT
INPUT
CIRCUIT
BREAKER
RIGHT SIDE
BOTTOM VIEW
CONDUIT HOLES
TOP & BOTTOM
MAIN
BREAKER
POWER
ON
AIR VENTS
(BOTH SIDES)

Page 10
INSTALLATION
AC Input
The AC input power to the MRIDC Dimmer is 120 volts, 1-phase, 60Hz. A dedicated feed with upstream fuse or
circuit breaker protection is required. All wiring in and out of the MRIDC Dimmer enclosure should be made using
conduit. Knock-out provisions for 1/2 conduit are provided on top and bottom of the enclosure. Two-conductor
wire with ground, properly rated per NEC and Local code (or larger) should be used.
Terminals for the AC input are located inside of the MRIDC Dimmer. Refer to “Appendix A - Component Location
Diagram and Circuit Diagram” for connection points. The hot wire connects to L, Neutral to N and ground to G.
DC Output
The MRIDC Dimmer is designed to work only with incandescent lighting. The lamps should be wired in parallel.
Use the properly indicated transformer tap for the total watt rating of the load. The + and – terminals are located
inside of the MRIDC Dimmer. Refer to “Appendix A - Component Location Diagram and Circuit Diagram” for
connection points. The positive and negative wires should be run together in the same conduit to prevent
induction heating. The negative output is grounded to the cabinet. Normal field wiring may be used (as you
would in an AC application).
KW Size
V
oltage Current Breake
r
600 W 120 VAC 7
A
15
A
1200 W 120 VAC 15
A
25
A
2000 W 120 VAC 26
A
35
A
3000 W 120 VAC 41
A
50
A
SCLU Input
KW Size Voltage Current Fuse
600 W 120 VDC 5
A
8
A
1200 W 120 VDC 10
A
15
A
2000 W 120 VDC 16
A
20
A
3000 W 120 VDC 25
A
30
A
SCLU Output