Tyco VIZOR Manual

VIZOR Electronic Dry Pipe Accelerator (EDPA)
Quick-Opening Device for
Dry Pipe Systems
IMPORTANT
Refer to Technical Data Sheet
TFP2300 for warnings pertaining to
regulatory and health information.
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General
Description
The TYCO VIZOR Electronic Dry Pipe
Accelerator (EDPA) is a quick-opening
device intended to reduce the operat-
ing time of the dry pipe valves listed in
Table A following operation of one or
more automatic sprinklers.
Unlike traditional mechanically oper-
ated quick-opening devices, the VIZOR
accelerator is a microprocessor-based,
electronic, quick-opening device.
The VIZOR accelerator automatically
adjusts to both small and slow changes
in system air pressure, but trips when
there is a steady drop in system air
pressure upon sprinkler operation.
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The VIZOR accelerator features the
following:
• Direct mounting to the riser
• Installation consistent with the instal-
lation of mechanical devices
• Easy test-and-reset function,
as compared to mechanical
accelerators
• Operation of a dry pipe valve within
four seconds — over a wide range
of system volumes, system initial air
pressures, and sprinkler K-factors
• Built-in low-pressure and high-pres-
sure alarm supervision
• Electronically self-supervising tech-
nology, similar to that used in typical
alarm panels for alarm and detection
systems
• Battery back-up in the event of pri-
mary power failure
The VIZOR Electronic Dry Pipe Acceler-
ator utilizes a unique, patented system
air pressure monitoring design that
continuously samples the system air
pressure.
When the VIZOR accelerator detects
a sustained drop in air pressure, the
VIZOR accelerator energizes its inter-
nal solenoid valve.
The energized solenoid valve then
opens to permit system air pressure
into the intermediate chamber of the
dry pipe valve.
The pressurized intermediate chamber
neutralizes the differential pressure
holding the dry pipe valve closed and
permits the dry pipe valve to trip and
flow water into the system piping.
AUGUST 2022
Worldwide
www.tyco-fire.com
Contacts
NOTICE
The VIZOR Electronic Dry Pipe Acceler-
ator described herein must be installed
and maintained in compliance with this
document and with the applicable stan-
dards of the NATIONAL FIRE PROTEC-
TION ASSOCIATION, in addition to the
standards of any authorities having
jurisdiction. Failure to do so may impair
the performance of this device.
The owner is responsible for main-
taining their fire protection system
and devices in proper operating con-
dition. Contact the installing contrac-
tor or product manufacturer with any
questions.
TFP1105