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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