System Sensor WFDT Installation And Maintenance Instructions

INSTALLATION AND MAINTENANCE INSTRUCTIONS
WFDT/WFDTH Vane-type
Waterflow Detectors
Specifications
Contact Ratings:
Triggering Threshold Bandwidth (Flow Rate):
Static Pressure Rating:
Dimensions, Installed:
Operating Temperature Range:
Shipping Weight:
Enclosure Rating:
The WFDTH can be installed between 2×4 stud wall construction.
U.S. Patent Number:
Important
Please Read Carefully And Save
This instruction manual contains important information
about the installation and operation of waterflow detec-
tors. Purchasers who install waterflow detectors for use by
others must leave this manual or a copy of it with the user.
Read all instructions carefully before beginning.
Use vane-type waterflow detectors in wet-pipe systems
only. DO NOT USE IN DRY-PIPE, DELUGE, OR PRE-
ACTION SYSTEMS. The sudden inrush of water in such
systems may break the vane off or damage the mechanism.
Do not use in potentially explosive atmospheres. Do not
leave unused wires exposed.
Principles of Operation
Vane-type waterflow detectors mount to water filled pipes
in sprinkler systems. Water flow in the pipe deflects a vane.
Deflection of the vane produces a switched output, usually
after a specified delay.
All WFDTs have a pneumatically controlled mechanical
delay mechanism. Delays are noncumulative; they reset if
the flow of water stops before the entire delay has elapsed.
All detectors will activate on a sustained flow of water
greater than 10 gallons per minute (gpm) but will not acti-
vate if the flow rate is less than 4 gpm.
Compatible Pipe Tees/Risers
The WFDT and WFDTH fit 1˝ to 1
and brass, 1˝ to 2˝ sweat brass, 1
and 1˝ pvc plastic tees having a 1˝ threaded NPT branch
(see Figure 1 and chart for recommended tee depths). For
2˝ cast and malleable threaded tees use 2˝ paddle (p02-
0023-000) provided. The WFDT and WFDTH also fits
N770-05-00
Two sets of SPDT (Form C)
10 A @ 125/250 VAC
4 – 10 GPM
250 PSI (Max.)
WFDT – 4 5
WFDTH – 4 5
32°F – 120°F (0°C – 49°C)
2.6 lbs.
WFDT – NEMA Type 4, as tested by Underwriters Laboratories, Inc. (UL)
(IP56)
WFDTH – Indoor use only, as tested by UL (IP10)
5,213,205; 4,782,333; 3,845,259
CAUTION
˝ NPT threaded ferrous
1 ⁄
2
1 ˝ polybutylene plastic
⁄
2
; 2.5 A @ 24 VDC
⁄ ˝H × 3 3 ⁄ ˝W × 6 3 ⁄ ˝D
16 4 4
⁄ ˝H × 3 9 ⁄ ˝W × 6 3 ⁄ ˝D
16 16 4
Tee Depth Threaded Sweat Poly B CPVC
1 × 1 × 1˝ 2
1 1 / × 1 1 / × 1˝ 2
4 4
1 1 / × 1 1 / × 1˝ 2
2 2
2 × 2 × 1˝ 3
Figure 1. Mounting dimensions:
3˝
Tee Adapter
Tee Depth
Refer to
Tee Depth
Table
1˝, 1 1 / ˝, and 2˝ Reliable riser manifolds when used with
2
paddle tree P02-0103-000 (purchased seperately).
Installation Guidelines
Before installing any waterflow alarm device, be thorough-
ly familiar with:
NFPA 72: National Fire Alarm Code
NFPA 13:
Installation of Sprinkler Systems
NFPA 25: Inspection, Testing, and Maintenance of
Water-based Fire Protection Systems, Section
5.3.3.2
1
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
Approximate Tee Depth Requirements
(see Figure 1)
CPVC/Spears/
1 3 1
/ ˝ 1 / ˝ N/A 2 / ˝
8 4 4
1 / ˝ 2 1 / ˝ N/A N/A
2 6
3 / ˝ 2 1 / ˝ 21/2 N/A
4 4
1 / ˝ 2 3 / ˝ N/A N/A
4 4
3 3 / ˝
4
(WFDT)
3 9 / ˝
16
(WFDTH)
5
4 / ˝
16
Gage (End of Paddle Tree)
Must Fit Between Top of
Tee and Bottom of Flange
Tee Fitting
Plastic Vane
www.systemsensor.com
Victaulic CPVC/Central
15 13
2 / ˝ 2 / ˝
32 16
N/A N/A
N/A N/A
N/A N/A
W0126-00
I56-0480-012R