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Section 8: Fire System Operation
8.1 Manual Signal Silence
Once the panel is in alarm and the alarm notification
appliances are active, entering a valid user code will
silence the alarm signals.
Silencing will not deactivate any output programmed as
Fire Strobe.
Manual Silencing initiates a Trouble condition by turning
on the keypad Trouble LED and sounding the keypad
buzzer. The buzzer may be silenced by entering an access
code.
If a waterflow alarm is present on the system silencing
will not be possible. Instead, the system will announce,
'Silence Inhibit, Waterflow Alarm'. All waterflow zones
must be secured before the system can be silenced.
8.2 Automatic Signal Silence (Bell Time-out)
Ref: Section[014] Option [8] Fire Bell Follows Time-out
Ref: Section[005] Bell Time-out (default 004 minutes)
The fire alarm notification appliances may be set to
silence automatically after a programmed time. The sys-
tem is default programmed to silence the notification
appliances four minutes after the last initiated fire alarm.
If the Fire Time-out option is disabled, the notification
appliance can only be silenced manually.
The Bell Time-out timer begins upon the first fire alarm.
Each subsequent alarm will restart the timer.
8.3 Manual Sensor Reset ([*][7][2])
The Sensor Reset function is designed so that the user can
manually reset latching smoke detectors by entering
[*][7][2]. In order for this feature to function, the detectors
to be reset must be connected to a programmable output
(PGM1-4, AUX+).
Program the output as 'Sensor Reset 2' (PGM output
option #03). The output pulse time is by default set at five
seconds. For instructions on output programming, see
your PC5020CF Installation Manual, Section 5.3 'Basic Pro-
gramming', [009]-[011] Programmable Output Options.
RECOMMENDED: As a security measure, ensure that
a code is required to activate [*][7][2]. This will
require that a user enter a valid access code after
entering [*][7][2] in order to reset smoke detectors.
8.4 Subsequent Alarm Operation
If the alarm notification appliances have been silenced –
manually or automatically – and a subsequent fire alarm
is initiated, the following will occur:
• Audible and visual notification appliances will acti-
vate as programmed.
• The Bell Time-out, if used, will restart for a full timing
period before automatic silencing.
• The new alarm and all previous alarms/troubles will
be displayed.
If a subsequent Fire alarm is initiated before the alarm
notification appliances have been silenced, either manu-
ally or automatically, then the following will occur:
• The Bell Time-out, if used, will restart for a full timing
period before automatic silencing.
• The new alarm will be shown.
8.5 Auto-Scroll LCD Keypad Display
When an alarm is initiated, the Alarm and selected Trou-
ble conditions will be displayed on the system LCD key-
pad(s). If there is more than one Alarm or Trouble present
simultaneously, the keypad will continuously scroll
through each event. Items on the scroll list are displayed
at two-second intervals. The keypad will beep as each
message is displayed.
Although critical Troubles are displayed, Auto-scroll is only
initiated upon a Fire Alarm. If a Fire Trouble is detected and
a Fire Alarm is not present, the Trouble will be indicated as
any other system trouble; the keypad Trouble light will turn
on and the keypad buzzer will beep.
The following events are included in the Auto-scroll.
• 'Fire Alarm [Zone Label]': This message will appear for
all Fire Alarms. Messages are displayed sequentially by
zone number.
• 'Fire Trouble [Zone Label]': This message will appear
for Fire off-normal conditions only and the keypad
buzzer will beep once as it is displayed. Messages are
displayed sequentially by zone number.
• 'Bell CCT Trouble': This message will appear if an
open fault is detected on the PC5020CF bell zone.
• 'Failure to Communicate': This message will appear
when the panel cannot report to the central station.
Auto-scroll will stop when a valid user code is entered to
silence the alarm notification appliances.
8.6 Fire Trouble Conditions
In all cases, when the panel detects a Trouble condition, the
keypad Trouble light turns on and the keypad buzzer will
sound two short beeps every 10 seconds. Pressing any key
will silence the audible Trouble signal. The Trouble buzzer
will resound if another Trouble is generated.
Fire Zone Trouble
A fire zone Trouble will be generated when an open cir-
cuit is detected on any fire zone.
AC Trouble
An AC Fail Trouble is generated if the AC fails on the
PC5020CF. AC Troubles are grouped for common indica-
tion on a remote annunciator as an 'AC Trouble'.
See also Section 5.6 'Communicator Programming', [377]'
Communication Variables.
Battery Trouble
A battery Trouble is generated if the PC5020CF/PS5350
panel batteries are open or shorted. This Trouble condi-
tion only turns on the keypad Trouble light and sounds
the keypad buzzer.
Ground Fault
Ground fault detection must be enabled for Commercial
Fire Monitoring installations by connecting the EGND
terminal on the PC5020CF to a solid earth ground. Upon
detection of a resistance of <40kΩ between any extended
conductor and earth ground, a Ground Fault Trouble will
be generated via zone 7 of the PC5700 (see Installation
Instructions for PC5700 fire module v2.0).
49
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