System Sensor WFD30EXP Installation And Maintenance Instructions

INSTALLATION AND MAINTENANCE INSTRUCTIONS
WFDEXP Explosion Proof
Vane-type Waterflow Detectors
Specifications
Contact Ratings:
Triggering Threshold Bandwidth (Flow Rate):
Static Pressure Rating:
Dimensions, Installed:
Operating Temperature Range:
Compatible Pipe:
Shipping Weight:
Enclosure Rating:
Important
Please Read Carefully And Save
This instruction manual contains important information about the instal-
lation 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. Follow only those instruc-
tions that apply to the model you are installing.
Use vane-type waterflow detectors in wet-pipe systems only. Do NOT use
them in dry pipe, deluge, or preaction systems. The sudden inrush of wa-
ter in such systems may break the vane or damage the mechanism.
Principles Of Operation
Vane-type waterflow detectors mount to water-filled pipes in sprinkler sys-
tems. Waterflow in the pipe deflects a vane, which produces a switched
output–usually after a specified delay. All waterflow detectors have a
pneumatically controlled mechanical delay mechanism. Delays do NOT
accumulate; they reset if the flow of water stops before the entire delay
has elapsed. All switches actuate when the water flow rate is 10 gallons
per minute or greater, but will not actuate if the flow rate is less than 4
gallons per minute. This System Sensor installation manual covers the fol-
lowing waterflow detectors for sprinkler/fire alarm applications.
Models
WFD20EXP Waterflow detector, Schedule 10/40, 2"
WFD25EXP Waterflow detector, Schedule 10/40, 2-1/2"
WFD30EXP Waterflow detector, Schedule 10/40, 3"
WFD30-2EXP Waterflow detector, Schedule 10/40, 3"
WFD35EXP Waterflow detector, Schedule 10/40, 3-1/2"
WFD40EXP Waterflow detector. Schedule 10/40, 4"
WFD50EXP Waterflow detector, Schedule 10/40, 5"
WFD60EXP Waterflow detector, Schedule 10/40, 6"
WFD80EXP Waterflow detector, Schedule 10/40, 8"
Do NOT use any of the WFD models on copper pipe. The clamping forces
of the mounting bolts may collapse the pipe sufficiently to prevent the de-
tector from functioning properly.
Do NOT install steel or iron pipe sections in copper piping for mounting a
waterflow detector. Incompatibility between the dissimilar metals causes
bimetallic corrosion.
D770-24-00
10 A @ 125/250 VAC; 2.5 A @ 24 VDC
4 to 10 gpm
450 PSI (Max) 2" – 8"
4.0"H x 8.8"W x 7.0"D
32° F to 120° F (0° C to 49° C)
Steel water pipe, schedule 10 or 40.
According to size.
NEMA 4 indoor/outdoor use
Hazardous Atmosphere Classification:
Class I, Groups B, C, D Div, 1; Class II, Groups E, F, G Div. 1; Class III Div. 1
CAUTION
CAUTION
NOTE: Not for use in potable water systems, systems where sand or
other material is present or systems employing other than water.
Installation Guidelines
Before installing any waterflow alarm device, be thoroughly familiar with:
NFPA 72: National Fire Alarm Code
NFPA 13: Installation of Sprinkler Systems, Section 3.17
NFPA 25: Inspection, Testing and Maintenance of Sprinkler Systems
Other applicable NFPA standards, local codes, and the requirements of the
authority having jurisdiction
Failure to follow these directions may prevent the device from reporting
the flow of water in the event the associated sprinkler system is activated
by a fire. System Sensor is not responsible for devices that have been im-
properly installed, tested, or maintained.
1. Mount the detector where there is adequate clearance for installation
and removal and a clear view of it for inspections. See Figure 1 for
mounting dimensions.
2. Locate to protect from damage – 6 to 7 feet above the floor.
3. On horizontal runs, position the detector on the top or side of the pipe.
Do not mount it upside down because condensation may collect in the
housing and impair the operation of the detector. For vertical flow ap-
plications, mount the detector on pipe through which water flows up-
ward. Otherwise, the unit may not operate properly.
4. Mount the detector at least 6 inches from a fitting that changes the di-
rection of water flow and no less than 24 inches from a valve or drain.
5. Be sure the direction-of-flow arrow matches the direction of flow
in the pipe.
Contact the appropriate personnel regarding the proper tools and proce-
dures when installing this device in a "HAZARDOUS" area. Disconnect
supply circuits before opening the cover, to reduce the chances of ignition
of hazardous atmospheres. Secure the cover and cover screws prior to ac-
tivating circuits. Tighten cover screws to 40 in. lbs. min.
1
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
CAUTION
I56-1452-002