Tyco ACC-1 User Manual

http://www.tyco-reproducts.com
Page 1 of 10 TFP1112_EN
General
Description
The Model ACC‑1 Accelerator is a quick
opening device intended for attachment
to the
Tyco Fire & Building Products, 2‑1/2,
3, 4 or 6” Model DPV‑1 Dry Pipe Valve. The
Model ACC‑1 Accelerator reduces the time
for valve operation following the operation
of one or more automatic sprinklers.
The Model ACC‑1 Accelerator automatical‑
ly adjusts to both small and slow changes
in system pressure, but trips when there is
a rapid and steady drop in pressure (as in
the case of a sprinkler operation). Upon
tripping, the Accelerator transmits system
air pressure to the intermediate chamber of
the Model DPV‑1 Dry Pipe Valve. This neu‑
tralizes the dierential pressure holding the
Model DPV‑1 Dry Pipe Valve closed and per‑
mits it to open.
The Model ACC‑1 Accelerator has a unique,
positiv
e ac
tion, internal anti‑ood device
and a ball oat which combine to prevent
water and water borne debris from entering
the more sensitive operating areas of the
acceler
ator. The anti‑ood device seals and
latches immediately upon operation of the
Model ACC‑1 Accelerator without waiting
for a pressure build‑up in the intermediate
chamber of the dry pipe valve. The latching
featur
e keeps the anti‑ood device sealed,
even while the system is being drained. The
ball oat seals the pilot chamber inlet port
if there is an inadvertent trip of the dry pipe
valve, due for example, to an air compressor
failure combined with a slow loss in system
air pressure due to a leak.
The Model ACC‑1 Dry Pipe Valve Accelerator
is a direct replacement for the Central Mod‑
el B, Gem Model F311, and Star Model S430.
Contact the Technical Services Department
for information concerning the use of the
ACC‑1 for use with dry pipe valves other
than the Model DPV‑1.
WARNING
The Model ACC‑1 Dry Pipe Valve Accelerator
described herein must be installed and main‑
tained in compliance with this document, as
well as with the applicable standards of the
National Fire Protection Association, in addi‑
tion
to
the standards of any other authori‑ties
having jurisdiction. Failure to do so may im‑
pair the integrity of this device.
The owner is responsible for maintaining their
re protection system and devices in proper
operating condition. The installing contrac‑
tor or sprinkler manufacturer should be con‑
tacted relative to any questions.
Technical Data
Approvals
UL and ULC Listed. FM and LPCB Approved.
Maximum Working Water Pressure
17,2 bar (250
psi)
Maximum Working Air Pressure
4,8 bar (70
psi)
Pressure Decay For Trip
0,07 bar/min (1
psi/min)
Physical Characteristics
Body components constructed of alodine
coated aluminum alloy with austenitic se‑
ries stainless steel internal components.
Seals are EPDM and silicone.
Model ACC‑1 Dry Pipe Valve Accelerator
External Resetting Quick Opening Device
For Dry Pipe Valves
Design Data
The connection to the system piping,
Figure 4, must be located so that drain
back water will not ow into the Accel‑
erator piping and it must be located at
a point above the maximum expected
level of the drain back/condensate water.
If the connection is made to the riser, it
must be located at least two feet above
the level of the dry pipe valve. Connec‑
tions to a feed or cross main must be
made either to the side or top of the main.
NOTES
Failure to follow the above instructions can
result in accidental tripping due to closure of
the ball oat.
Quick operation of the Accelerator does not
ensure that the re protection system will
meet the water delivery time requirement of
the authority having jurisdiction (following
opening of the Inspector’s Test Connection).
The sprinkler system designer needs to be
aware that water delivery time is primarily
determined by the conguration and volume
of the piping network, system air pressure
at time of Accelerator trip, and water supply
characteristics.
General
Description
The Model ACC-1 Accelerator is a
quick opening device intended for at-
tachment to the Tyco Fire Products, 4
or 6 inch Model DPV-1 Dry Pipe Valve.
The Model ACC-1 Accelerator reduces
the time for valve operation following
the operation of one or more automatic
sprinklers.
The Model ACC-1 Accelerator auto-
matically adjusts to both small and
slow changes in system pressure, but
trips when there is a rapid and steady
drop in pressure (as in the case of a
sprinkler operation). Upon tripping, the
Accelerator transmits system air pres-
sure to the intermediate chamber of
the Model DPV-1 Dry Pipe Valve. This
neutralizes the differential pressure
holding the Model DPV-1 Dry Pipe
Valve closed and permits it to open.
The Model ACC-1 Accelerator has a
unique, positive action, internal anti-
flood device and a ball float which com-
bine to prevent water and water borne
debris from entering the more sensi-
tive operating areas of the accelerator.
The anti-flood device seals and
latches immediately upon operation of
the Model ACC-1 Accelerator without
waiting for a pressure build-up in the
intermediate chamber of the dry pipe
valve. The latching feature keeps the
anti-flood device sealed, even while
the system is being drained. The ball
float seals the pilot chamber inlet port
if there is an inadvertent trip of the dry
pipe valve, due for example, to an air
compressor failure combined with a
slow loss in system air pressure due to
a leak.
The Model ACC-1 Dry Pipe Valve Ac-
celerator is a direct replacement for
the Central Model B, Gem Model F311,
and Star Model S430. Contact the
Technical Services Department for in-
formation concerning the use of the
ACC-1 for use with dry pipe valves
other than the Model DPV-1.
WARNING
The Model ACC-1 Dry Pipe Valve Ac-
celerator described herein must be in-
stalled and maintained in compliance
with this document, as well as with the
applicable standards of the National
Fire Protection Association, in addition
to the standards of any other authori-
ties having jurisdiction. Failure to do so
may impair the integrity of this device.
The owner is responsible for maintain-
ing their fire protection system and de-
vices in proper operating condition.
The installing contractor or sprinkler
manufacturer should be contacted
relative to any questions.
Technical
Data
Approvals
UL and ULC Listed. FM and LPCB
Approved.
Maximum Working Water Pressure
250 psi (17,2 bar)
Maximum Working Air Pressure
70 psi (4,8 bar)
Pressure Decay For Trip
1 psi/min (0,07 bar/min)
Physical Characteristics
Body components constructed of
alodine coated aluminum alloy with
austenitic series stainless steel inter-
nal components. Seals are EPDM and
silicone.
Patents
The following patents may be applica-
ble to the Model ACC-1:
U.S.A. 4,570,719 and
United Kingdom 2,159,406.
Design
Data
The connection to the system piping,
Figure 4, must be located so that drain
back water will not flow into the Accel-
erator piping and it must be located at
a point above the maximum expected
level of the drain back/condensate
water.
If the connection is made to the riser,
it must be located at least two feet
above the level of the dry pipe valve.
Connections to a feed or cross main
must be made either to the side or top
of the main.
NOTES
Failure to follow the above instructions
can result in accidental tripping due to
closure of the ball float.
Quick operation of the Accelerator
does not ensure that the fire protection
system will meet the water delivery
time requirement of the authority hav-
ing jurisdiction (following opening of
the Inspector’s Test Connection). The
sprinkler system designer needs to be
aware that water delivery time is pri-
marily determined by the configuration
and volume of the piping network, sys-
tem air pressure at time of Accelerator
trip, and water supply characteristics.
Model ACC-1 Dry Pipe Accelerator
External Resetting Quick Opening Device
For Dry Pipe Valves
Page 1 of 8 TFP1112
JANUARY, 2003
Technical Services: Tel: (800) 381-9312 / Fax: (800) 791-5500
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Tyco ACC-1 Specifications

General

Brand	Tyco
Model	ACC-1
Category	Control Unit
Language	English