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Infinite
8 I 6 Key Telephone
System
INSTALLATION
SECTION
500
INSTALIATION
500.1
SITE PLANNING
The In$Y&e
816 Key Telephone
System.
like
most electronic
office equipment,
should
not be
subjected
to harsh
environmental
conditions.
To assure
easy servicing
and reliable
opera-
tion, the following
factors
must
be considered
when
planning
the system installation:
l
The KSU is designed
for wall-mounting
only.
l
The internal
power
supply
operates
on
117V ac. 60 Hz. single phase electricity.
A 3-wire
(parallel
blade
with
ground)
receptacle
must be provided
on a dedi-
cated. separately
fused
15 ampere
cir-
cuit.
l
Location(s)
of telephone
conduits
or ca-
ble runs.
l
The KSU should
be within
25 feet of the
telephone
company
RI21-X.
The KSU
should
be centrally
located
and
assur-
antes
should
be made
to stay within
prescribed
cable lengths.
-
500 ft. 26 AWG twisted
pair
-
1000 ft. 24 AWG twisted
pair
-
1500 ft. 22 AWG twisted
pair
A well ventilated
area having
a recom-
mended
temperature
range
of 70 to 78
degrees
Fahrenheit,
and
a humidity
range of 5 to 90% (non condensing).
LighUng
and
accessibility
of KSU for
servicing.
Protection
from flooding,
flammable
ma-
terials.
excessive dust and vibration.
Proximity
of radio -tt-w
equip-
ment,
arc-welding
devices, copying
ma-
chines,
and other
electrical
equipment
that are capable
of generating
electrical
interferences.
Access to a good earth ground
such as
a metallic
COLD water pipe. Inspect
the
pipe for non-metallic
joints.
500.2
UNPACgING
THE KSU
a,. Remove the KSU from the shipping
carton
and place it on a level working
surface,
face up.
b. Inspect the KSU for physical
damage.
'Ihe
KSU has no user-serviceable
parts.
500.3
KSU GROUNDING
To ensure
that the system
will operate
prop-
erly, a good earth ground
is recommended.
Use
of the Telco ground
(source not 'D" markl
or a
metallic
COLD water pipe will usually
provide
a reliable
ground
path.
Carefully
check that
the pipe does not contain
insulated
joints
that
could isolate the ground.
In the absence
of the
cold water
pipe, a ground
rod or other
source
may be used.
A no. 8 AWG copper wire should
be used between
the ground
source
and the
KSU.
IVOlE The ground
wire shDuld be kept as short
aspossibleandcunbecw-tectedtotheground
hglocatedonthebottomofth.eKSUCFigure
200.2).
500.4
KSU INSTALLATION
The KSU is designed
for wall mounting
only.
It
should
not be mounted
directly
on a masonry
surface.
If the KSU must
be mounted
on a
masonry
surface,
a wooden
backboard
of suf-
ficient
size should
be attached
to the wall and
the
1.
2.
KSU mounted
on the backboard.
Mount
the KSU on the backboard
using
four fasteners.
me
fasteners
should
be
selected carefully
to be capable of support-
ing the KSU.)
Refer to Figure
500-l
for
KSU dimensions.
Install
the ground
using
an insulated
8
AWG copper wire.
Attach
one end to the
ground
lug on the KSU cabinet
and the
other
end to a good earth
ground.
See
Figure 200-2.
The KSU power
supply
is located
within
the
KSU, and all electrical
connections
are pro-
vided externally.
The power cord exits the KSU
on the bottom.
Also on the bottom
is a fuse
holder
that contains
a 1.0 ampere
slow-blow
fuse.
Power for the system is distributed
inter-
dY*
The power
cord should
not
be used
with
a
Issue
1, January
1992
500-l
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