System Sensor WFD Installation And Maintenance Instructions

SysTEMM
SENSOR
INSTALLATIoN AND MAINTENANCE INSTRUCTIONS
rech
Intral Deeiogmrnt
Zan
WFD
Vane-type Waterflow Detectors
Prinee f Sh aam. 71 0075, Chi
Teiephone (29 347800 Fas (037) 382959
SPECIFICATnONS
Contact Ratings:
higgering Threshold Bandwidth (Flow Rate):
Static Pressure Rating
Dimensions, Installed:
l0 A @
125/250 VAC
N
25
A@
24 VDC
- - -
4 to 10 gpin
See models listed below
3.5 in Hx 30 in W x 6.7 in D
Operating Temperature Range:
Compatible Pipe:
Shipping Weight:
Enclosure Rating:
U. S. Patent Numbers
32°F to 120°F (0°C to 49°C)
Steel water pipe, schedule 10 through 40
4 to 7 Ib (according to size)
NEMA Type 4, as tested by Underwriters Laboratories, Inc. (1PS6)
5,213, 3,205
IMPORTANT
INSTALLATmON GUIDELUNES
Please Read Carefully And Save
Before instaling any waterflow alarm device, be thoroughly farmiliar with:
This instruction manual contains important information about the installation NFPA 72: National Fire Alarm Code
and
operation
of
waterlow detectors. Purchasers
who
install waterflow detec
tors for use by others must leave this manual or a copy of it with the user.
NFPA 13: Installation of Sprinkler Systems, Sect. 3.17
NFPA 25: Inspection. Testing and Maintenance of Sprinkler Systesms, Sect 5332
Read all instructions carefully before beginning. Follow only those instnuc-
tions that apply to the model you are installing. Other appiicable NFPA standards, local codes, and the requiremenits of the
authority having jurisdiction
ACAUTION
NOTE: Installation methods other than those listed in this instaliation manual
Use vane-type waterlow detectors in wel-pipe systems only. Do NOT use
Imay preven! tihe device irom reporiing the Llow oí water in the event the asso-
them in dry pipe, deluge. or preaction systems. The sudden inrush of water in ciated sprinkier system is activated by a ire. XTan Sysem Sensor is not responsible
such systems may break the vane or damage the mechanism.
for devices that have been improperiy installed, tested, or maintained
Do not use in potentially explosive atmospheres. Do not allow unused wires
lo remain exposed.
1. Mount the detector where there is adequate clearance tor installation and
removaB and a clear view of it for inspections. See Figure I for maunting
dimensions.
2.Locate the detector 6 to 7 feet above the floor to protect from acca
dental damage.
PRINCIPLES OF OPERATION
Vane-type waterflow detectors imount to water-filled pipes in sprinkler systems.
Waterflow in the pipe deflects a vane, which produces a switched outpul 3. On horizontal runs, position the detector on the top or side of the pipe.
usually after a specilied delay. All waterflow detectors have a pneumatically
controlled mechanical delay mechanism. Delays do NOT accuinulate; they re
set 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 low rate is less than 4 gallons per minute. This System Sen-
sor
installation manual
covers
the
following
watertlow detectors for
sprinkler
ire alarm applications.
Do not mount it upside down because condensation may collect in the
housing and impair thse operaüon of he detector. For vertical flow appli-
Ccations, mount the detector on pipe through which water fiows upward.
Otherwise, the unit mnay not operaie properiy.
4. Mount the detector at least 6 inches fron a f+itüng that changes the direc-
tion of water tlow and no less than 24 inches irom a valve or drain.
5. Be sure the direction-of-low aToW matches the directOn of llow in the pipe.
Pipe Size Pipe
Max. Pressure
MOUNTING INSTRUCTiONS
Model
(inches)
Schedule
Rating (psig)
1. Drain the pipe.
WFD20
10 thru 40
450
Cut a hole at the desired location. Center the hole in tbe pipe, às shown
in Figure 2, and be sure the hole is perpendicular to the center of the
pipe. Before drilling. use a punch or scribe to mark the dill site to pre
vent the bit trom slipping. If the hole is off center, the vane will bind
gainst the inside wall of the pipe. Use a dril or hole saw to cut a hole of
the proper diameter. See Table I tor hole size.
WFD25
2.5
10 thru 40 450
WFD30-2 10 thru 40 450
WFD35 3.5
10 thru 400 450
WFD40 10 thru 40 450
WFD50 10 thru 40 450
ACAUTION
When drilling the hole with a hole saw, make certain that the center ot the cut
does nol remain in the pipe.
WFD60 10 thru 40 450
WFD80 10 thru 40 450
Kemove burrs and sharp edges from the hole. Clean and remove all scale
and toreign matter trom the inside ot the pipe lor one diameter on each
Side of the hole to ensure free movement of the vane. Clean the outside
of the pipe to remove dirt, metal chips, and cutting lubricant.
Maximum Ptressure Rating 400 psig
as
approved by Factory
Mutual
Research.
ACAUTION
Do NOT use any of the WFD models on copper pipe. The clamping 1orces . Seat the gasket against the saddle and mount the delector directly to the
the mounting
bolts
may
collapse
the
pipe sufficiently
to
prevent
the detector
from functioning properly.
pipe. Carefully roll the vane opposite the direction of tlow and insert
through the hole. Seat the saddle firmly against the pipe so that the local-
ng boss goes into the hole.
Do NOT install steel or iron pipe sections in copper piping for mounting
waterflow detector. Incompatibility between the dissimilar metals causes b
ustnal Development Zone
Province o1 Shaanxi, 710075, China
Telephone: (029) 8S387800 Fax: (029) 88332959
metallic corrosion.
D770-01-00C
I56-0459-017C