Honeywell WFDN Series Waterflow Detector Instruction Manual

: June 9, 2024
: Honeywell

Table of Contents

Honeywell WFDN Series Waterflow Detector
GENERAL
FEATURES
SPECIFICATIONS
- ENGINEERING SPECIFICATIONS
Ordering Information
References
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Honeywell WFDN Series Waterflow Detector

Honeywell WFDN Series Waterflow Detector PRODUCT

GENERAL

WFDN SERIES
The WFDN Series Waterflow Detectors are compatible with Schedule 7 through 40 steel pipe, sizes 2″ through 4″ (50.8 mm through 101.6 mm), and are compatible with Schedule 10 through 40 steel pipes, sizes 5” through 8” (127 mm through 203.2 mm). They can be mounted in a vertical or horizontal position. WFDN Series detectors are contained in a rugged, NEMA 4-rated enclosure. Designed for both indoor and outdoor use, the WFDN Series operates across a wide temperature range: 32°F to 150°F (0°C to 66°C). UL-Listed models are equipped with tamper-resistant cover switch to prevent unauthorized entry. Inside, two sets of SPDT (Form-C) synchronized switches are enclosed in a durable terminal block with a new layout designed to make wiring easy with wire ready terminals. COM terminals are on a different elevation. There is a large barrier between switches and raised textured lettering make it easy to read. An optional cover tam-per switch is available which securely snaps into place, no tools required.
WFDN Series detectors incorporate a mechanical time delay feature, which minimizes the risk of false alarm due to pres-sure surges or air trapped in the sprinkler system. The larger and easy to turn timer dial makes setting the waterflow detec-tor easy. The WFDN Series is designed for accuracy and repeatability. The detector also offers improved performance during vibration in riser applications where detectors are exposed to a large rush of water.

FEATURES

New directional cover allows installers and inspectors to easily see the direction of flow.
UL-Listed models are NEMA 4 rated.
Sealed retard mechanism immune to dust and other con-taminants
Less exposed metal reduces shock hazard. Plastic cover acts as an insulator and is resistant to arcing.
Visual switch activation
Audible switch activation (73 dBA).
Field-replaceable timer/switch assembly.
Accommodates up to 12 AWG wire.
Switch synchronization activates both alarm panel and local bell or horn strobe.
Tamper-resistant cover screws.
Improved water sealing.
Reduced product weight.
Wire-ready terminals.
Improved wiring with new terminal block layout.
Snap-in optional cover tamper switch.
Improved timer repeatability and accuracy.

SPECIFICATIONS

WFDN SERIES

Static Pressure Rating: 450 PSI.

Triggering Threshold Bandwidth (flow rate): 4 to 10 GPM.

Maximum Surge: 18 feet per second (FPS) (5.4864 m/sec).

Compatible Pipe: steel water pipe, 2” – 4” (50.8 mm through 101.6 mm) rated for use with Schedule 7 through 40 pipe, 5” -8” (127 mm through 203.2 mm) rated for use with Schedule 10 through 40 pipe.

Contact Ratings: two sets of SPDT (Form-C) contacts; 10.0 A @ 1/2 HP @125/250 VAC; 2.5 A @ 6/12/24 VDC.

Conduit Entrances: two openings for 0.5″ (12.7 mm) con-duit. One open, one knock-out type. NEMA 4 rated plugs

Operating Temperature Range: 32°F to 150°F (0°C to 66°C).

Enclosure Rating: NEMA 4, suitable for indoor/outdoor use.

Cover Tamper Switch: standard for ULC models; optional for UL models (P/N CTS).

Service Use: NFPA 13 for Automatic Sprinkler; NFPA 13D for One- or Two- Family Dwelling; NFPA 13R for Residential Occu-pancies up to Four Stories; NFPA 72 for National Fire Alarm Code.

Warranty: 3 years.

ENGINEERING SPECIFICATIONS

WFDN SERIES
Vane-type waterflow detectors shall be installed on system piping as designated on the drawing and/or as specified herein. Detectors shall mount on any clear pipe span of the appropriate nominal size, either a vertical upflow or horizontal run, at least 6″ (152.4 mm) from any fittings which may change water direction, flow rate, or pipe diameter; or no closer than 24″ (0.6096 m) from a valve or drain. Detectors shall have a sensitivity in the range of 4 to 10 gallons per minute and a static pressure rating of 450 psi for 2″ (50.8 mm) to 8″ (203.2 mm) pipes. The detector shall respond to waterflow in the specified direction after a preset time delay which is field-adjustable. The delay mechanism shall be a sealed mechanical pneumatic unit with visual indication of actuation. The actu-ation mechanism shall include a polyethylene vane inserted through a hole in the pipe and connected by a mechanical link- age to the delay mechanism. Outputs shall consist of dual SPDT switches (Form-C contacts). Two conduit entrances for standard fittings of commonly used electrical conduit shall be provided on the detectors. A grounding provision is provided. Unless noted, enclosures shall be NEMA 4 Listed by Under-writers Laboratories Inc. All detectors shall be Listed by Underwriters Laboratories Inc. for indoor or outdoor use.

Agency Listings and Approvals
These listings and approvals apply to the modules specified in this document. In some cases, certain modules or applications may not be listed by certain approval agencies, or listing may be in process. Consult factory for latest listing status.

UL Listed: S739
ULC Listed: S739
MEA Listed: 167-93-E
CSFM: 7770-1653:114
FM Approved

Ordering Information

WFDN Series Detectors

WFDN Field Wiring Diagram Overall Dimensions Installed

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This document is not intended to be used for installation purposes. We try to keep our product information up-to-date and accurate. We cannot cover all specific applications or anticipate all requirements. All specifications are subject to change without notice.
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