Earth Ground - Honeywell FBII CP-220A Hookup And Installation Instructions

What Makes a Good Ground?
Grounding provides a degree of
protection for any piece of electronic
equipment against lightning-induced
transients, which may
permanent or temporary general
malfunctions.
The ideal "ground" is considered to
be a unified earth ground in which an
8-foot copper-clad rod, located close
to the existing power and telephone
ground rods, is sunk several feet into
the earth. Appropriate hardware and
clamps are then used to electrically
connect each of these rods together.
Since this procedure is difficult in
most cases, an alternative earth
ground connection can be made to a
conductive metal cold water pipe
within the premises. Because such
pipes ultimately route their way into
the earth, the attachment to the pipe
of a suitable metal clamp and a
length of wire can make an effective
ground connection for the CP-220A.
When connecting the ground wire,
observe the limitations cited at the
right and make sure the connection
is secure. Also, verify that the pipe is
metallic throughout its entire run into
the earth, because much of today's
plumbing is made from PVC (plastic)
compounds. Do not use a hot water
pipe for grounding because it will
likely attach to a heating apparatus
that may not, itself, be grounded.
It may be possible to use an existing
electrical ground on the premises if
one is close enough to the receiver.
Ideally, that ground can be obtained
at the metal panel
incoming electrical service originates.
Once again, use the same guidelines
cited for your wiring and be sure the
wiring attachment is secure.
doubt, you may wish to enlist the
help of a licensed electrician in
matters concerning grounding.
Page 1-12 Section 1: Getting Acquainted CP-220A Central Station Receiver
AC Fuse
Directly above the Line Cord is the unit's "master fuse." If
this fuse is either blown or removed, the CP-220A will be
unable to operate from AC power. After the cause of a blown
cause
fuse is determined, replace it with an AGC-Type or
GLH-Type 1½-ampere fast-blow fuse. The approximate
dimensions of this fuse are 1¼" long x ¼" diameter. The AC
Fuse can be removed by pressing down on the cap and
turning it a quarter turn to the left. Replace fuses in the
opposite manner.
NOTE: The CP-220A will operate without its AC Fuse if a

Earth Ground

To protect the CP-220A from damage due to the effects of
lightning, a solid 14-gauge wire (or larger [numerically
lower] size) must be attached to this terminal and run to
where an acceptable electrical ground connection can be
made. Keep this wire as short as possible and do not run it
in conduit, coil it, bend it sharply, or run it alongside other
wiring. If you must bend it or change its direction, it should
have a radius of at least 8 inches at the point it is bent.
Additional grounding information is provided at the left.
Standby Battery
At the lower left corner of the rear panel is a white molex
connector used for the connection of a standby battery.
Standby batteries will, in the absence of AC Power or an
intact AC fuse, operate the CP-220A for up to 24 hours,
depending on the amount of activity logged by the Central
Station.
This battery, a 12-Volt, 55 Amp-Hour (AH) rechargeable gel
cell, is connected to the CP-220A via an FBI-furnished
No. 135 cable. The battery charging current is limited to a
where the
maximum of 5 amperes. Refer to Figure 1-6 on previous
page.
NOTE: Using a Globe, 12-Volt DC, 55AH, UL-Listed gel cell
If in
UL NOTE: When used for Central Station Service, a
Hook-Up and Installation Manual
suitable Standby Battery is properly connected and
the Battery Fuse is intact. The Standby Battery and
its fuse are discussed below.
(or equivalent) will
operation for (typically) 24 hours in the event of an
AC power outage.
minimum of 24 hours of backup power is required.
When used for Remote Station Service, a minimum
of 60 hours of backup power is required.
maintain the CP-220A's