System Sensor PDRP-1001 - Manual (Page 33)

Piezo 3. System Operation
PDRP-1001 Instruction Manual PN 50734:D0 04/06/01
33
Piezo
The piezo (local buzzer) generates different tone patterns for different event conditions:
• Alarm - Generates a steady tone, no pulse.
• Trouble - Pulses one second on, one second off. Repeats 30 pulses per minute.
• Supervisory - Pulses one-half second on, one-half second off. Repeats 60 pulses per minute.
Supervisory Service
Initiating Device Circuit #4 is always used for monitoring supervisory devices (such as valve tamper
switches). A short circuit on this IDC (activation of a N.O. contact) will cause the Supervisory LED and
the Zone 4 (Supervisory) trouble LED to flash. The piezo will sound one-half-second on, one-half-second
off. Pressing TONE SILENCE will silence the piezo and cause the Supervisory LED to illuminate steadily,
but the Zone 4 (Supervisory) trouble LED will continue to flash. Supervisory signals latch and require
SYSTEM RESET to clear (unless unit is programmed for non-latching operation). The ALARM SILENCE
switch will silence the piezo, causing the Supervisory LED to illuminate steadily and turn off the
Supervisory Notification Circuit. An open circuit on Zone 4 (Supervisory) will be reported as a trouble.
Note: The Initiating Device Circuit for sprinkler supervisory zone can be programmed for tracking operation; latching
operation is the default setting. Canadian regulations require latching operation; for programming instructions, see
"Sprinkler Supervisory Tracking" on page 34.
Zone Disable
If a zone has been disabled, an alarm that occurs on that zone will flash the red zone LED, but not the piezo
or any output circuit. If both power sources are removed from the system, all zones will be re-enabled upon
restoration of power. Disable status will be lost.
The Zone Disable routine makes use of the four panel
switches as follows:
1. Press and hold in the TONE SILENCE switch.
2. With the TONE SILENCE switch held in, press
(in sequence) the ALARM SILENCE switch, the
ALARM ACTIVATE switch, and then the
SYSTEM RESET switch.
3. The Zone 1 Alarm LED will flash.
4. To disable Zone 1, press the SYSTEM RESET switch. The Zone 1 yellow LED will light to show
that the zone is disabled.
Note: The SYSTEM RESET switch toggles disable status for the selected zone.
5. To select the next zone, press the ALARM SILENCE switch.
6. To select the previous zone, press the ALARM ACTIVATE switch.
7. When disable selections are complete, release the TONE SILENCE switch.
If any zone has been disabled, the trouble relay will activate and System Trouble LED will flash.
TONE
SILENCE
ALARM
SILENCE
ALARM
ACTIVATE
SYSTEM
RESET
Press
&
Hold
Press ---> Press ---> Press