Safe Signal WFDNFT Installation And Maintenance Instructions

INSTALLATION AND MAINTENANCE INSTRUCTIONS
WFDNFT Vane-type Waterflow Detectors
SPECIFICATIONS
Contact Ratings:
Triggering Threshold Bandwidth (Flow Rate):
Static Pressure Rating:
Dimensions, Installed:
Operating Temperature Range:
Enclosure Rating:
The WFDNFT can be installed between 2×4 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.
The model WFDNFT is a vane-type waterflow detector for use in wet-pipe fire sprin-
kler systems only. Vane-type waterflow detectors shall not be used as the sole initiat-
ing device in both deluge and preaction systems; waterflow detectors used in these
types of systems may result in an unintended discharge caused by a surge, trapped air
or a short retard time.
Installation must be performed by qualified personnel and in accordance with all na-
tional and local codes and ordinances.
Shock hazard: Disconnect power source before servicing. Serious injury or death
could result.
Risk of explosion: Not for use in hazardous locations. Serious injury or death could
result.
PRINCIPLES OF OPERATION
Vane-type waterflow detectors mount to water filled pipes in fire sprinkler systems.
Waterflow in the pipe deflects a vane. Deflection of the vane produces a switched
output, usually after a specified delay.
All WFDNFT detectors have a pneumatically controlled mechanical delay mecha-
nism. Delays do NOT accumulate; they reset if the flow of water stops or drops below
minimum triggering flow rate before the entire delay has elapsed. All detectors will
activate on a sustained flow of water of 10 gallons per minute (gpm) or greater down-
stream of the device.
COMPATIBLE PIPE TEES/RISERS
The WFDNFT is supplied with 12 paddles. One paddle is provided for each size of
tee. See Figure 1 and approximate tee depth chart. Each paddle has an indication that
shows the pipe size and type of tee to be used.
INSTALLATION GUIDELINES
Before installing any waterflow alarm device, be thoroughly familiar with:
NFPA 72: National Fire Alarm Code
NFPA 13: Installation of Sprinkler Systems
NFPA 13D: Standard for 1 and 2 Family Dwellings and Manufactured Homes
NFPA 13R: Standard for Multi-family Dwellings
Also, follow other applicable NFPA standards, local codes and the requirements of the
authority having jurisdiction. Failure to follow these directions may result in failure of
Two sets of SPDT (Form C); 10 A @ 125/250 VAC
4 – 10 GPM
175 PSI (Max.)
WFDNFT – 4 in H x 3½ in W x 6¾ in D
32°F to 150°F (0°C to 66°C)
WFDNFT – NEMA 4/IP54, as tested by Underwriters Laboratories, Inc. (UL)
CAUTION
WARNING
; 2.5 A @ 12/24 VDC
FIGURE 1. MOUNTING DIMENSIONS AND APPROXIMATE TEE DEPTH
REQUIREMENTS
2-5/8"
4-3/32"
TEE
ADAPTER
TEE
DEPTH
APPROXIMATE TEE DEPTH REQUIREMENTS
Steel*/
Copper*
TEE SIZE Brass
Sweat
Threaded
1 X 1 X 1" 2 1 / " 1 3 / "
8 4
1 1 / X 1 1 / x 1" 2 1 / " 2 1 / "
4 4 2 8
1 1 / X 1 1 / x 1" 2 3 / " 2 1 / "
2 2 4 4
2 X 2 X 1" 3 / " 2 / "
1 3
4 4
(1) Use paddle marked 1" CPVC; (2) Use paddle marked SPEARS 1" CPVC;
(3) Use paddle marked TYCO 1" CPVC; (4) Use paddle marked 1
This waterflow detector has been evaluated for use with UL Listed CPVC fittings manu-
factured by the following companies: Tyco, Nibco and Spears Manufacturing Company.
The Model WFDNFT is required to be installed in accordance with the Listing limitations
specified by the manufacturer of the tee fitting.
*See UL Listing Limitations on page 4.
1
3-1/2"
LOCKING
COLLAR
GAUGE SUPPLIED ON
PADDLE TREE MUST FIT
BETWEEN TEE ADAPTER
SHOULDER AND TEE
.15"
TEE FITTING
PLASTIC VANE
CPVC CPVC
CPVC
SPEARS SPEARS w/
NIBCO
w/Metal Band Brass Insert
2 1 / " (1) 2 3 / " (1) 2 1 / " (2)
8 32 2
N/A N/A N/A
N/A 3" (4) N/A
N/A N/A N/A
/ " CPVC
1
2
W0400-00
CPVC
TYCO
2 3 / " (3)
4
N/A
N/A
N/A
I56-4263-B
4/21