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INSTALLATION AND MAINTENANCE INSTRUCTIONS
WFDTNR Vane-type
Waterflow Detector
Specifications
Contact Ratings:
Triggering Threshold Bandwidth (Flow Rate): 4 - 10 GPM
Static Pressure Rating:
Dimensions, Installed:
Operating Temperature Range:
Shipping Weight:
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 oth-
ers 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 wet-pipe systems
only. Water flow in the pipe deflects a vane. Deflection of
the vane produces a switched output. All detectors will ac-
tivate 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
Model WFDTNR fits 1"–1
brass, 1" - 2" sweat brass, 1
pvc plastic tees having a 1" threaded NPT branch (see Fig-
ure 1 and chart for recommended tee depths).
Installation Guidelines
Before installing any waterflow alarm device, be thor-
oughly familiar with:
NFPA 72:
Installation, Maintenance and Use of Local
Protective Signalling Systems
N770-06-00
Technical Manuals Online! - http://www.tech-man.com
10 A @ 125/250 VAC
2.5 A @ 24 VDC
250 PSI (Max.)
"H × 3
3
1
/
4
3
1
/
" above pipe tee
4
32° F - 120° F (0° C - 49° C)
1.5 lbs.
CAUTION
1
/
" NPT threaded ferrous and
2
1
/
" polybutylene plastic and 1"
2
"W × 4
1
/
1
/
"D
4
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:
1 3/4"
3 1/4"
"TEE DEPTH"
REFER TO
TEE DEPTH
TABLE
NFPA 13:
Installation of Sprinkler Systems, specifically
Section 3.17
NFPA 25:
Inspection, Testing and Maintenance of Sprin-
kler Systems, specifically Chapters 4 and 5
NFPA 13D:
Standard for Residential Dwellings
NFPA 13R:
Standard for Multifamily Dwellings
Other applicable NFPA standards, local codes and the re-
quirements of the authority having jurisdiction.
Failure to follow these directions may result in failure of the
device to report a waterflow condition. System Sensor is
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
32
"
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 1/4"
HEX TEE ADAPTOR
INSTALLATION
GAGE (END OF
PADDLE TREE)
MUST FIT
BETWEEN TOP
OF TEE AND
BOTTOM OF HEX
TEE ADAPTOR
FLANGE.
PIPE TEE FITTING
PLASTIC VANE
"
13
2
/
16
N/A
N/A
N/A
A78-2110-01
I56-509-02R
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Summary of Contents for Pittway System Sensor WFDTNR
- Page 1 INSTALLATION AND MAINTENANCE INSTRUCTIONS WFDTNR Vane-type A Division of Pittway 3825 Ohio Avenue, St. Charles, Illinois 60174 Waterflow Detector 1-800-SENSOR2, FAX: 630-377-6495 Specifications Contact Ratings: 10 A @ 125/250 VAC 2.5 A @ 24 VDC Triggering Threshold Bandwidth (Flow Rate): 4 - 10 GPM Static Pressure Rating: 250 PSI (Max.)
- Page 2 Figure 2. Assembly diagram: wrench. Use of thread sealant or tape is recommended. Use height gage (located at end of paddle tee) to ensure proper depth of detector on tee fitting. See Figure 1. COVER Height gage must fit between top of tee fitting and under side of hex tee adapter.
- Page 3 Figure 3. Field wiring: NOTE: Common and B connections will close when vane is deflected, i.e., Switch 1 when water is flowing. Dual switches permit applications to be combined on a single detector. CONTACT RATINGS Switch 2 125/250 VAC 10 AMPS 24 VDC 2.5 AMPS Strip Gauge...
- Page 4 WARNING The Limitations of Waterflow Alarm Devices 1. Waterflow detectors may not work or operate properly if of 10-15 years. Hard water systems, however, may re- sprinkler piping being monitored is plugged with pipe duce waterflow detector service life to 4 or 5 years. scale, mud, stones or other foreign material.
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