Installation
and
Operation
Manual
65
Ground
Fault
.
A
trouble
condition
in
which
a
low
resistance
has
been
detected
between
the
system
wiring
and
the
conduit
ground.
Initiating
Device
.A
manually
or
automatically
operated
device,
such
as
a
manual
station,
a
smoke
detector,
a
heat
detector,
a
waterflow
switch,
a
or
tamper
switch.
Initiating
Device
Circuit
(IDC).
A
circuit
to
which
initiating
devices
are
connected.
Labeled.
Equipment
or
materials
to
which
is
attacheda
label,
a
symbol,
or
another
identifying
mark
of
an
organization
acceptable
to
the
authority
having
jurisdiction
and
concerned
with
product
evaluation,
which
maintains
the
periodic
inspection
of
the
production
of
such
labelled
equipment
or
materials.
And
by
whose
labelling
the
manufacturer
indicates
compliance
with
appropriate
standards
or
performance
in
a
specified
manner.
LED.
Light
Emitting
Diode.
LCD.
Liquid
Cristal
Display.
Listed.
Equipment
or
materials
included
in
a
list
published
by
an
organization
acceptable
to
the
authority
having
jurisdiction
and
concerned
with
product
evaluation
that
maintains
the
periodic
inspection
of
the
production
of
the
listed
equipment
or
materials,
and
whose
listing
states
either
that
the
equipment
or
material
meets
the
appropriate
standards
or
has
been
tested
and
found
suitable
for
use
in
a
specified
manner.
NEC.
National
Electrical
Code,
also
published
as
NFPA
standard
70.
Notification
Appliance.
An
electrically
operated
appliance
used
to
indicate
the
system
status,
such
as
a
bell,
horn,
strobe
light,
or
speaker.
NAC
(Notification
Appliance
Circuit).
A
circuit
to
which
notification
appliances
are
connected.
NOU.
Notification
Output
Unit.
PCU.
Power
Supply
and
Charger
Unit.
Power
Supply
.
The
part
of
the
Fire
Alarm
Control
Panel
which
provides
the
power
needed
to
operate
all
control
panel
modules,
as
well
as
needed
to
operate
all
electrically
powered
initiating
devices
and
all
notification
appliances.
Programming
Tool.
Refers
to
an
external
proprietary
software
package
that
allows
the
user
to
program
the
panel.
PTU.
Power
Supply
Transformer
Unit.
Quick
Test.
Term
pertaining
to
the
test
mode
of
the
system
that
automatically
resets
after
a
service
technician
tests
the
initiating
devices.
ROU.
Relay
Output
Unit.