Engineering Specification
T-Tap style waterflow detector with a solid state retard shall be an Accuflow™ Series model number __________ manufac-
tured by System Sensor. Waterflow detector shall be installed on a tee that has a 1” NPT branch including: 1”. 1-1/4”, or
1-1/2” threaded ferrous or brass tee; 1-2” copper sweat tee; 1” CPVC tee; or 1-1/2” polybutylene tee as designated on
the drawings and/or specified herein. For 2” cast and malleablle threaded tees use 2” paddle (P02-0023-000) provided.
Detector shall mount on any clear pipe span of the appropriate size, either in a vertical or horizontal run at least 6” from
any fittings or valves which may change water direction, flow rate, or pipe diameter, or no closer that 24” from a valve or
drain. For 2” cast and malleablle threaded tees use 2” paddle (P02-0023-000) provided. Detectors shall have a sensitivity
in the range of 4 to 10 gallons per minute and a static pressure rating of 250 psi. The detector shall respond to water
flow in the specified direction after a preset time delay. The delay mechanism shall be a solid state unit which is field-
adjustable via a dipswitch. The actuation mechanism shall include a polyethylene vane inserted through the tee fitting and
connected by a mechanical linkage to the delay mechanism. Outputs shall consist of one SPDT switch (Form C contact)
and one SPST switch (normally open) for wiring to an alarm panel or addressable control module and/or bell or notification
device. Two conduit entrances (one of which is a knockout type) for standard fittings of commonly used electrical conduit
shall be provided on the detectors. A grounding provision shall be provided. AFDT housing shall be NEMA 4 rated by
Underwriters Laboratories for indoor/outdoor use. All other models shall be rated for indoor use.
Standard Specifications
Static Pressure Rating
250 PSI
Current Draw
300 microamps @ 12/24 VDC or FWR
400 microamps @ 120 VAC
Operating Temperature Range
32°F - 120°F (0°C to 49°C)
Triggering Threshold Bandwidth (Flow Rate)
4 - 10 GPM
Enclosure Rating
Compatibility
AFDT:
UL Indoor/outdoor rated - NEMA 4
The Accuflow and Accuflow Low Flow detectors
may receive power and operate on a two-wire initi-
ating zone of a fire alarm control panel. When
determining compatibility of these devices, the
standby operating voltage of the control panel
must be between 8.5 and 35 volts. In the standby
mode, each Accuflow and Accuflow Low Flow
detector acts as a shot across the initiating zone.
For two wire conventional fire alarm control panels,
not more than 5 waterflow detectors may be con-
nected to a single initiating zone. The maximum
retard/reset time of the waterflow detector plus
the initiating zone shall not exceed 90 seconds.
All others: Indoor rated
Maximum Surge
18 Feet Per Second (FPS)
Cover Tamper Switch
Optional, part no. 546-9000
Compatible Pipe
Threaded ferrous and brass tees, copper sweat
tees, CPVC tees, and polybutylene tees
Shipping Weight
2.5 lbs. (1.13 kg)
Overall Dimensions Installed
Service Use
AFDT:
4.5”H x 3.75”W x 6.7”L
Automatic Sprinkler: NFPA-13
One or Two Family Dwelling: NFPA-13D
Residential Occupancies up to
4 stories: NFPA-13R
(11.4cm H x 9.5cm W x 17cm L)
4.5”H x 3.55”W x 6.7”L
AFDTH:
(11.4cm H x 9cm W x 17cm L)
National Fire Alarm Code: NFPA-72
Contact Ratings
For two wire addressable control panels, the num-
ber of waterflow detectors connected to the
panel’s signaling line circuit shall be limited by the
circuit’s current capacity.
One SPDT (Form C)
One SPST (normally open)
0.6 A @ 125 VAC
2.0 A @ 30 VDC
Retard Settings
0 - 90 seconds, in increments of 15 seconds
Warranty
3 years
Conduit Entrances
Voltage Range
Two openings for 1/2” conduit, one open, one
knock-out type
8.4 - 35 V (DC-FWR)
108 - 132 VAC
Ordering Information
Model Number
AFDT*
Description
Replacement Part Number
Description
Waterflow Detector, Fits 1”, 1-1/4”, 1-1/2”
560-9000
WFDW
Cover tamper switch kit
Tamper proof wrench for cover
Gasket kit
ferrous and brass threaded tees; 1”, 1-1/4”,
1-1/2”, 2” copper sweat tees; 1” CPVC tees;
and 1-1/2” polybutylene tees
WFDN4
PRK9
Paddle kit - 12 paddles
Retard PCB kit
AFDTH*
Waterflow Detector, Fits 1”, 1-1/4”, 1-1/2”
ferrous and brass threaded tees; 1”, 1-1/4”,
1-1/2”, 2” copper sweat tees; 1” CPVC tees;
and 1-1/2” polybutylene tees
AFDPCBRK
.
*ULC version designated with “A” suffix (AFDTA, AFDTHA).
System Sensor Sales and Service
System Sensor Headquarters
3825 Ohio Avenue
St. Charles, IL 60174
Ph: 800-SENSOR2
Fx: 630/377-6495
Documents On Demand:
1-800-736-7672 x3
System Sensor in Canada
Ph: 905.812.0767
Fx: 905.812.0771
System Sensor in China
Ph: + 86.29.524.6253
Fx: + 86.29.524.6259
System Sensor in the Far East
Ph: + 852.21919003
Fx: + 852.27366580
System Sensor in India
Ph: + 91.11.558.2119
Fx: + 91.11.567.6815
System Sensor in Europe
Ph: + 44.1403.276500
Fx: + 44.1403.276501
System Sensor in Singapore
Ph: + 65.273.2230
Fx: + 65.273.2610
System Sensor in Australia
Ph: + 613.54.281.142
Fx: + 613.54.281.172
Web: www.systemsensor.com
© 2003 System Sensor. The company reserves the right to change product specifications without notice.
A05-0281-002•1/03(10K)•#1051
SYSTEMSENSOR [ SYSTEMSENSOR ADVANCED IDEAS. ]
