Chamberlain SENTEX INFINITY Installation Instructions Manual page 3

INSTALLATION GUIDELINES
The sections that follow contain detailed procedures for each step
required to install the access control system. In addition, the
following installation guidelines will help ensure your installation
is done correctly and efficiently.
GROUND THE UNIT. The system contains parts that may be
damaged by static discharge. A proper earth ground connected to
the upper left grounding screw shown on page 8 or 9 will
significantly reduce the chances of damage or improper operation.
The shielding in the cables for all remote keypads or card readers
should be connected to the earth ground at the controller end of
the cable only.
To be effective, the ground connection must be made by running
12 AWG copper wire to a good ground point (e.g., an electrical
panel, a metallic cold water pipe that runs into the earth, or a
grounding rod at least 10' in length that is driven into the earth)
within 12' of the unit. Even if you have a good earth ground, you
should try to discharge any static before handling the circuit
boards.
WARNING: Damage caused by static discharge is not covered by
warranty.
CAUTION: Do not connect the two large heat sinks on the main
circuit board together as doing so can damage the power supply.
PROVIDE POWER FROM A DEDICATED SOURCE. The outlet(s)
into which you plug the provided transformer or an AC power
supply should each be wired to their own circuit breaker. The
optional closed circuit television (CCTV) must be plugged into a
separate outlet. This will reduce line noise introduced into system
power and minimize the risk of having other equipment interrupt
unit operation.
DO NOT OVERLOAD THE TERMINAL BLOCKS. The terminal
blocks used in the unit are removable and the pins are soldered
into the boards. To connect your wires, remove the "head" from
the correct terminals and open the screws. Insert the wire into the
correct opening on the front and tighten the screw until the wire is
held snugly. When you have made all connections for a given
"head," plug it back onto the pins designated for that terminal
block. Do the same for the optional CCTV board.
Stranded wire must be between 16 and 24 AWG. Solid wire must
be between 18 and 24 AWG. This is the total thickness
measurement so, if you are putting two wires in, the combined
thickness must fall within this range. NEVER try to insert more
than two wires per terminal.
READ THE MARKINGS CAREFULLY. The connection points are
marked on the boards clearly. Before making any connections, be
sure to read the markings and check it against the corresponding
figure in these instructions so that you understand the connection
you are making.
I N T R O D U C T I O N
MOUNT THE UNIT AT THE CORRECT HEIGHT. Mount the unit
according to local, state, or national regulations (i.e., the
Americans with Disabilities Act). If no such regulations apply,
mount the "L" series systems with the display center 5 1/2' high
for walk-up installations and 4' high for drive-up installations.
Mount "S" series systems slightly lower because the LCD reads
better from above.
CLEAN THE DISPLAY AND WINDOW. The LCD display, protective
lexan window, and the curved window in the "L" series display
hood may be coated with an optional anti-glare formula. Dirt
seriously reduces this coating's effectiveness, making the display
hard to read. Your customer MUST clean these assemblies
routinely using a soft rag and mild soap and water. Avoid harsh or
abrasive cleaners.
TRAIN YOUR CUSTOMER. The system is easy to program and
use when you take a few minutes to train the user, but untrained
users can cause serious problems for you and for themselves.
SPEND THE TIME NOW to train your customer; it will save you
both a lot of trouble later.
FIGURE 1
FIGURE 2
FIGURE 3
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