Pittway 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 2X4 stud wall construction.
Important
Please Read Carefully And Save
This instruction manual contains important information
about the installation and operation of waterflow detectors.
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-AC-
TION SYSTEMS. The sudden inrush of water in such sys-
tems 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
activate if the flow rate is less than 4 gpm.
Compatible Pipe Tees
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).
N770-05-00
Technical Manuals Online! - http://www.tech-man.com
Two sets of SPDT (Form C)
10 A @ 125/250 VAC; 2.5 A @ 24 VDC
4 - 10 GPM
250 PSI (Max.)
WFDT– 4 5 /
16
5
WFDTH– 4 /
16
32° F - 120° F (0° C - 49° C)
2.6 lbs.
WFDT– NEMA Type 4, as tested by Underwriters Laboratories, Inc. (U.L.)
WFDTH– Indoor use only, as tested by U.L.
CAUTION
" NPT threaded ferrous
1 /
2
" polybutylene plastic
1 /
2
" H × 3 " W × 6 " D
3 / 3 /
4 4
" H × 3 " W × 6 " D
9 3
/ /
16 4
Approximate Tee Depth Requirements
Tee Depth Threaded Sweat Poly B CPVC
1 × 1 × 1"
1
2 /
8
× 1 × 1"
1 1 1
1 / / 2 /
4 4 2
× 1 × 1"
1 1 3
1 / / 2 /
2 2 4
2 × 2 × 1"
N/A
Figure 1. Mounting dimensions:
3"
Tee Adapter
Tee Depth
Refer to
Tee Depth
Table
Installation Guidelines
Before installing
thoroughly 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
NFPA 13D: Standard for 1 and 2 Family Dwellings and
Manufactured Homes
NFPA 13R: Standard for Multi-family Dwellings
1
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
(See Figure 1)
CPVC/Spears CPVC/Central
" " "
3 1 15
1 / N/A 2 / 2 /
4 4
" "
1
2 / N/A N/A N/A
6
" " "
1 1
2 / 2 / N/A N/A
4 2
"
3
2 / N/A N/A N/A
4
"
3
3 /
4
(WFDT)
"
9
3 /
16
(WFDTH)
"
5
4 /
16
Gage (End of Paddle Tree)
Must Fit Between Top of
Tee and Bottom of Flange
Tee Fitting
Plastic Vane
any waterflow alarm
" "
13
2 /
32 16
N/A
N/A
N/A
A78-1939-00
device, be
I56-480-05R