Tyco VIZOR EDPA User Manual
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VIZOR Electronic Dry Pipe Accelerator (EDPA)
Quick-Opening Device for
Dry Pipe Systems
General
Description
The TYCO VIZOR Electronic Dry Pipe
Accelerator (EDPA) is a quick-opening
device intended to reduce the operating time of the dry pipe valves listed in
Table A following operation of one or
more automatic sprinklers.
Unlike traditional mechanically operated 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.
The VIZOR Accelerator features the
following:
• Direct mounting to the riser
•
Installation consistent with the
installation 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-pressure alarm supervision
•
Electronically self-supervising
technology, similar to that used in
typical alarm panels for alarm and
detection systems
•
Battery back-up in the event of
primary power failure
The VIZOR Electronic Dry Pipe Accelerator utilizes a unique, patented system
air pressure monitoring design that
continuously samples the system air
pressure.
Refer to Technical Data Sheet
TFP2300 for warnings pertaining to
regulatory and health information.
IMPORTANT
When the VIZOR Accelerator detects
a sustained drop in air pressure, the
VIZOR Accelerator energizes its internal 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.
NOTICE
The VIZOR Electronic Dry Pipe Accelerator described herein must be installed
and maintained in compliance with this
document and with the applicable standards of the NATIONAL FIRE PROTECTION 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 maintaining their fire protection system
and devices in proper operating condition. Contact the installing contractor or product manufacturer with any
questions.
Technical
Data
NOTICE
Quick operation of the TYCO VIZOR
Electronic Dry Pipe Accelerator
does not ensure that the fire 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 has to be
aware that water delivery time is primarily determined by the configuration and
volume of the piping network, system
air pressure at the time of accelerator
trip, number and orifice size of open
sprinklers, and water supply characteristics. It is essential for the designer to
verify the impact of these site-specific
factors on water delivery time.
Approvals
Listings and approvals are under
the name of Potter Electric Signal
Company Electric Dry Pipe Accelerator (EDPA). Refer to Table A for Listings and Approvals for use of the
VIZOR Accelerator with specific dry
pipe valves.
• UL and ULC Listed
The VIZOR Accelerator is UL and
ULC Listed per UL1486 for a maximum system capacity of 1690
gallons (6397 liters) for a single
nominal 5.6 K-factor sprinkler and a
maximum working water pressure
of 300 psi (20,7 bar).
• FM Approved
The VIZOR Accelerator is FM
Approved for TYCO Model DPV-1
Valves and can be used with the
following discontinued models:
Central Models AG and AF, GEM
Models F302 and F3021, and Star
Models A and A1.
Page 1 of 12 AUGUST 2018 TFP1105
TF P1105
Page 2 of 12
Manufacturer
Valve Model
TYCO
Model DPV-1
Central
Models AG and AF
Gem
Models F302 and F3021
Star
Models A and A1
Note: For retrot applications, the FM Approved Model DPV-1 application of
EDPA Electronic Accelerator Systems can be used for the specied
discontinued valves.
Valve Size
ANSI Inches
(DN)
4 and 6
(DN100/15 0)
3, 4, and 6
(DN80/100/150)
4 and 6
(DN100/15 0)
4 and 6
(DN100/15 0)
UL
Listed
X X
X See note.
X See note.
X See note.
TABL E A
LABORATORY LISTINGS AND APPROVALS FOR
DRY PIPE VALVE COMPATIBILITY
Switch Setting
0 7 (0,48) 10 (0,69) 15 (1, 04)
1 7 (0,48) 15 (1,0 4) 20 (1,38)
2 15 (1, 04) 20 (1,38) 25 (1,72)
3 15 (1, 04) 25 (1,72) 30 (2,07)
4 20 (1,38) 30 (2,07) 35 (2,41)
5 25 (1,72 ) 35 (2,41) 4 0 (2,76)
6 30 (2,07) 40 (2,76) 45 (3,10 )
7 35 (2,41) 45 ( 3 ,10 ) 50 (3,45)
8 45 ( 3 ,10 ) 55 (3,79) 60 (4,14)
9 55 (3,79) 65 (4,48) 70 (4,83)
Low Air Threshold
psi (bar)
Nominal Pressure
psi (bar)
High Air Threshold
TABL E B
VIZOR ELECTRONIC DRY PIPE ACCELERATOR
HIGH/LOW PRESSURE SETTINGS
FM
Approved
psi (bar)
Maximum Water Pressure
300 psi (20,7 bar)
Air Pressure
10 to 65 psi (0,69 to 4,48 bar)
Pressure Decay For Trip
0.1 psi/sec. (0,007 bar/s)
High/Low Pressure Settings
Refer to Table B
VIZOR Environmental
Specifications
• VIZOR Accelerator
• NEMA 2, Indoor use
40°F to 120°F (4°C to 49°C)
• Battery Cabinet
NEMA 1, Indoor use
32°F to 120°F (0°C to 49°C)
Power Requirements
Maximum 0.75 A @ 120/220 AC
Batteries (Ordered Separately)
• Standard
24-hour battery back-up provided by
two 12-volt (1.3 AH) Batteries
• Optional
90-hour battery back-up provided by
two 12-volt (5 AH) Batteries
Battery Current Draw
Standby: 43 ma; Alarm: 440 ma
Dry Contact Rating
Trouble: 5 A @ 30 VDC
High/Low: 5 A @ 30 VDC
Installation Dimensions
Refer to Figure 6
NOTICE
When the VIZOR Accelerator is installed
in accordance with these instructions,
the equipment’s design provides reasonable protection against limited
radio frequency sources. Intentionally subjecting the equipment to radio
frequency sources could result in
unintended operation of the dry pipe
system.
VIZOR Accelerator Indicators and
Controls
Refer to Figures 1 and 2.
•
AC Power (Green LED): On steady
when AC power is present
•
Trouble/Supervisory (Amber LED):
On steady for Trouble, 1 ash per
second (slow) for low pressure, 4
ashes per second (fast) for high
pressure
•
Battery Trouble (Amber LED):
On steady for low battery
•
Tripped (Red LED): Flashes for 30
seconds to indicate the solenoid is
open and the VIZOR Accelerator
is tripped; lights steady after 30
seconds indicating the solenoid is
closed
TF P1105
Page 3 of 12
VIZOR ELECTRONIC DRY PIPE ACCELERATOR
•
S1 (Two-Position Switch): Up to
SET to place the VIZOR Accelerator in service when air pressure
matches rotary switch setting; down
to OFF to take the VIZOR Accelerator out of service
•
S2 (Two-Position Momentary
Switch): Up to RESET to reset the
VIZOR Accelerator after activation;
down to SILENCE to silence the
buzzer
•
Buzzer: Indicates any trouble or
supervisory condition by sounding
an audible alarm
•
Trouble Dry Contacts (Normally
Open): Activate on any trouble
condition such as low batteries or
when S1 is pushed into the OFF
position; activate on a loss of AC
power after 60 minutes
•
High/Low Dry Contacts (Normally
Open): Activate when system
pressure is outside of the normal
setting of the rotary switch
Operation
The TYCO VIZOR Electronic Dry Pipe
Accelerator provides a microprocessor-based, electronic, dry pipe valve
accelerator designed to monitor the
air pressure in a dry pipe system and
reduce the time it takes for the dry pipe
valve to operate following the opening
of one or more sprinklers. The VIZOR
Accelerator can be used in new instal-
SET
OFF
S1
S2
RESET
HAZARDOUS VOLTAGE MAY BE PRESENT.
DISCONNECT POWER BEFORE SERVICING.
TROUBLE / SUPERVISORY
LED INDICATOR CODES
ON STEADY: SYSTEM TROUBLE
SLOW FLASH: LOW PRESSURE
SILENCE
FAST FLASH: HIGH PRESSURE
OPERATING INSTRUCTIONS
Normal operation: Place S1 to SET after system reaches normal air pressure.
Disable for testing or maintenance: Place S1 to OFF.
Reset after a trip: Place S1 to OFF. After system reaches normal operating pressure,
press S2 to RESET and place S1 to SET.
Note: The accelerator will be in a trouble condition when S1 is placed to OFF. Press
S2 to SILENCE to silence the trouble buzzer.
AC POWER
TROUBLE /
SUPERVISORY
BATTERY
TROUBLE
TRIPPED
FIGURE 1
FRONT VIEW WITH COVER CLOSED
lations or to replace mechanical type
accelerators in existing systems.
The VIZOR Accelerator operates upon
detection of a steady drop in air pressure of 0.1 psi per second (0,007 bar/s)
or greater, or if the pressure drops to
5.5 psi (0,38 bar). The VIZOR Accelera-
tor typically responds to an open sprinkler in approximately 2 seconds.
In order to minimize false trips and
high/low air trouble conditions, the
use of a tank mounted air compressor or plant air in conjunction with the
TYCO AMD-1 Air Maintenance Device
is strongly recommended, The compressor, or plant air, should be set to
maintain a minimum of 10 psi greater
than the required system air pressure.
Note: Although the VIZOR Accelerator is designed to respond to an open
sprinkler in approximately 2 seconds,
operation of the dry pipe valve is
expected within 4 seconds. The difference of 2 seconds is a conser vative estimation for the dry pipe valve to
physically trip.
Upon detection of a drop in air pressure, the VIZOR Accelerator opens
an internal solenoid valve allowing
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 valve to open. The solenoid valve
automatically closes after 30 seconds.
The VIZOR Accelerator contains two
sets of normally open, dry contacts.
The High/Low Supervisory Contacts
close if the normal system air pressure
in the system increases or decreases
beyond a given point (refer to Table B).
The ten-position rotary switch (refer to
Figure 2) provides ten preset pressure
settings. The factory setting is position
#4 for a normal system air pressure of
30 psi.
The Trouble Dry Contacts close during
any one of the following conditions:
•
Low-battery condition (up to a
1-minute delay is normal)
•
AC power loss (after a 60-minute
delay)
•
SET/OFF switch in the OFF position
An internal buzzer sounds during any
off-normal condition.
Installation
The TYCO VIZOR Electronic Dry Pipe
Accelerator must be installed in accordance with this section.
NOTICE
When working on the VIZOR Accelerator or the dry pipe valve, S1 should be
in the OFF position; otherwise, the dry
valve can inadvertently trip.
Make all pipe fitting connections to
the VIZOR Accelerator inlet and outlet
ports by using the wrench flats on the
TF P1105
MINIMUM SYSTEM AIR PRESSURE, PSI (BAR)
(4,1)
MAXIMUM SYSTEM CAPACITY,
2800 (10598)
Page 4 of 12
2600 (9841)
2400 (9084)
2200 (8327)
2000 (7570)
1800 (6813)
1600 (6056)
GALLONS (LITRES)
1400 (5299)
1200 (4542)
1000 (3785)
800 (3028)
K 11.2
K=8.0
K=5.6
K=4.2
10 20 30 40 50 60
(0,7) (1,4) (2,1) (2,8) (3,4)
Notes
1.
Quick operation of the TYCO VIZOR Electronic Dry Pipe 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 has to be aware that water delivery time is primarily determined
by the conguration and volume of the piping network, system air pressure at time of Accelerator trip, number and
orice size of open sprinklers, and water supply characteristics. It is essential for the designer to verify the impact
of these site-specic factors on water delivery time.
2.
The sensitivity criteria for the VIZOR Accelerator is a function of its pressure decay for trip rating of 0.1 psi (0,007 bar)
per second, as well as the system volume, the K-factor of the sprinklers being utilized, and the minimum initial air
pressure. The larger the system volume combined with smaller sprinkler K-factor or lower initial air pressure results
in a slower air decay rate upon the rst sprinkler operation. Conversely, a smaller system volume combined with a
larger sprinkler K-factor or higher initial air pressure results in a faster air decay rate.
3.
When the sprinkler system has been designed within the criteria provided by Graph A, operation of the VIZOR
Accelerator and subsequent operation of the associated dry pipe or preaction valve can be expected within four
seconds. In the case of the double interlock preaction system, operation is based on the electric detection system
operating before a rst sprinkler operation.
4.
The minimum system air pressure must be the greater of that required for the dry pipe / preaction valve as a function
of the maximum expected water supply pressure or per Graph A when using the VIZOR Accelerator.
5.
When considering multiple sprinkler operations as in the case of using a dry system water delivery design per NFPA
13, use the “11.2 K-factor and larger” curve as referenced in Example 3 below.
Examples
1.
For a system volume of 1500 gallons (5680 liters) and the use of sprinklers having a K-factor of 5.6, the minimum
system air pressure must be 18.5 psi (1,3 bar).
2.
For a system volume of 2000 gallons (7570 liters) and the use of sprinklers having a K-factor of 8.0, the minimum
system air pressure must be 16.0 psi (1,1 bar).
3.
With the use of a dry system water delivery design per NFPA 13, wherein the operation of two 5.6 K-factor sprinklers
might be anticipated (and the effective K-factor is then 11.2), the “11.2 K-factor and larger” curve can be utilized.
Consequently, for a system volume of 2400 gallons (9084 liters), the minimum system air pressure must be 11.5 psi
(0,8 bar).
GRAPH A
TYCO VIZOR ELECTRONIC DRY PIPE ACCELERATOR
SENSITIVITY CRITERIA BASED ON FM APPROVAL
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