System Sensor WFD20 User manual

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 [phone]
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 x6.7 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 instructionmanual 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: [phone]
metallic corrosion.
D770-01-00C
I56-0459-017C

he -boli,
tightening
the
nuts
alernately
to ensure
a unilform
seal
PRE-OPERATION
TESTING
(see Table 1 for torque values)
6.
Remove the metal
cover
with
the
tamper-proof
wrench
provlded.
ove
Ihe
actuator lever
back
and
forth to
check
for
binding.
I the
vane binds, re*
move
the
detector and correct
the
cause
before
proceeding
. Fill the sprinkler system and check lor leaks around the waterflow detec-
tor. If it leaks, first check for the proper torque on the U-bolt nuts. If the
leak persists, drain the system and remove the detector (reler to Mainte
nance). Check for dirt or foreign objects under the gasket. and make sure
that the pipe surface is not dented. Reinstall the detector and check again
for leaks. Do not proceed until all leaks have been stopped.
ACAUTION
Be sure the direction-of-low arow points in the right direction or else water 2. Connect an ohmmeter or econtinuity tester actos the COM and B-NO
low
will
go
unreported.
See
Figure
3 switch terminals. The
ohnmeter should indicate an open clrcuít.
3. Deflect the actuator lever and hold it until the pneumatic delay shaft
releases the switch buttons. The ohmmeter or continuity tester should
show a short circuit after the delay has elapsed. If there is no delay,
check the setting of the delay adjustment dial.
FIaURE
1.
MOUNTING
DIMENSIONS
_95mm
(3/T)
FiGURE 3. AsSEMBLY DIAGRAM:
-COVER
TAMPER PROOF
WRENCH
(P/N WFDW)
76mm
(3)
PIPE DIAMETER
PLUS 133mm
(5)
U-BOLT
NUT
TERMINAL
BLOCK
(REPLACEMENT
P/N A77-01-02)
h,|
PIPE
SADDLE
DELAY
MECHANISM
(REPLACEMENT
(P/N A3008-00)
ELECTRICAL
CONDUIT
ENTRANCE
PIPE
MOUNTING PLATE
PIPE
VANE
U-BOLT
NUT
PIPE SADDLE
U-BOLT
PLASTIC VANE
ROLL PADDLE
OPPOSITE OF
FLOW ARROW
WHILE INSERTING
OVERALL IDTH = PIPE DIAMETER+76mm (3)
FIGURE 2. MOUNTING HOLE LOCATION: SADDLE GASKET
WRONG
PIPE
RIGHT
WATERFLOw
REFER To
TABLE 1
U-BOLT
WIRING
REMOVE BURRS FROM EDGE OF HOLE. CLEAN OUT SCALE
AND
FOREIGN
MATTER FROM
INSIDE WALL
OF
PIPE.
1. All models have two SPDT switches. Switch contacts COM and B-NO
are closed when water is lowing and open when it is not. Connect the
switches, as shown in Figure 4, depending on the application.
When connected to a listed sprinkler/fire alarm control panel, the initat-
ing circuit must be nonsilenceable.
TABLE 1:
WFD MODEL
HOLE SIZE (IN)
TORQUE
A
ground
screw
is
provided
with all waterflow detectors. When
ground
ing ls required, clamp wire with serew in hole located between condult
entrance holes. See Figure SA, page 4.
f a second conduit enuy is required, remove the knockout plug using à
1lat blade screwdriver as shown on Figure 5B, page 4. Strike sharply ith a
hamner to pierce the wall of the knockout plug. Move to an adjacent wall
section and repeat until the plug falls out. Make sure that the watertlow
detector
is
supported
alequately
during
this
operatlon
to avoid
injury
20, 25
14
30-35 It-b.
30-2, 35, 40, 50, 60, 80|
2 55-60 fl-lb.
D770-01-0OC
156-0459-017C

tem
Sensor
is
not
responsible
tor
devices
that
have
been
Improperly
instaled.
tested, or maintained.
AAWARNING
High
Voltage.
Electrocution
Hazard.
Do
not
handle
live AC
wiring
or work
on a
device
io which
AC
power
is
applied.
Doing
s0 may
result
in
injury
or
death.
To remove a detector
When
utilizing
switches
at
voliages greater
than
74VDC
---
or
49VAC
means
to
provide
all-pole
disconnection
must
be
incorporaled
in the
fixed
wiring,
such
as a
circuit
breaker.
1.
Drain the
pipe.
2.
Turn off
electrical
power
to
the
detector
and
disconnect
the
wiring.
3.
Loosen
the
nuts
and remove
the
U-bolts.
Genly
lift
the
saddle
íar
enough
to
get
your
fingers
under
it.
Then, roll
the
vane so it
will
tit
through
the
bole
while
continuing
to
lift
the
water
flow detector saddle.
FIaURE 4. WFD WIRIN0
NOTE: COMMON AND B-NO
CONNECTiONS WILL CLOSE
WHEN VANE IS DEFLECTED, LE
WHENWATER IS FLOWING. DUAL
SWITC
NG
TO
BE
COMBINED
ON A SINGLE DETECTOR
SSM24-X
SSV120-X
5.
Lift
the
detector
clear
of
the
pipe.
LISTED
COMPATIBLE
ACAUTION
f a
vane
breaks
in a
pipe,
find and remove
it.
If
it
is
not
removed, the
vane
may
resuict
the
low ol
water
to
all
or
part
of
the
sprinkler
system.
CONTROL PANEL
POWER
24VDC OR
120VDC
suGGESTED EOL
HESISTON
CONTACT RATINGS
125/250 VAC 10 AMPS
L24 VoG| 26 AMPS
INITIATING
LOOP
FIGURE
SA.
GROUND
SCREW
LOCATION:
sCHEMATIC OF
INDIVIDUAL
IN
-GROUNND
SCREW
(GREEN)
SWTCH
C
"NO WATERFLOW
CONDITION
BREAK WIRE AS
SHOWN ON OF
SEON DO
NOT ALLOW
STRIPPED WIRE
LEADS TO EXTEND
BEYOND SWITCH
HOUSING. DO NOT
LOOP WIAES.
T
-MOUNTING
PLATE
J
FIGURE
SB.
KNOCKOUT
PLUG
REMOVAL:
MECHANICAL DELAY ADJUSTMENT
The pneumatic delay is preset at the factory to 30 scconds. To adjust the set-
ting, turn the adjustment dial clockwise to increase the delay, counterclock
wise to decrease
it.
The
delay
is
adjustable
from
0 to 90 seconds. See
Figure
6, page 4.
NOTE:
Set
the
delay
to the
minímum
required
to prevent
false
alarms
from
flow surges.
Periodically test time delay as required by Authority Having Jurisdiction or
code authority.
OPERATIONAL TESTING
Always
notifly
a
central
station
monitoring
waterflow
alarms
before
repairing.
maintaining. or testing waterflow alarm devices.
1.
Replace
the
cover
and
tighten
the
tamper
proof
screws
with the
lamper
proof
wrench.
Store the
wrench in
a
secure
place.
FIGURE 6. DELAY ADJUSTMENT DIAL:
2.
Open
the
inspector's
test
valve
and
time
how
long
it
takes for
the
detec-
tor
to
indicate a
low
condition.
The
detector
should
remain
activated un-
til the
inspector's
test
valve
is
closed.
Air
pockets
in
the
sprinkler
system
may increase the apparent delay.
DELAY
USTMENT
DIAL
ON
DIAL
IS
APPRO
oPROXIMATE
SECONDS
ER
DELAY IN
UM
DIME DEL
MAINTENANCE
To
prevent accidental
water
damage,
conirol
valves
should
be
shut
tight
and
the
system
completely drained
before
waterílow
detectors
are
removed
or
re-
placed.
Inspect detectors
in
accordance
with
applicable
NEPA
codes
and
standards
and/or
the
authority
having
jurisdiction
for
leaks
and
replace
if a
leak
occurs.
Test
detectors al
least
quarterly,
as
described
under
Operational
Testing.
to
ensure
proper
operation.
Test
more
often if
required
by the
authority
having
jurisdiction.
.
Under
nonal
conditions,
Xian
System Sensor
waterilow
detectors
should
provide
years
of
truubie-íree
service.
However,
if the
delay
mechanis1n or
switch
en-
closure
needs
to
be
replaced,
follow
these
directions.
To
replace
the
delay
mechanism
or
switch
enclosure, use
a
3/16
socket
head
screwdriver
to re-
move
the
three
screws
that
hold
it
in
place.
Either
mechanism
can
be
easily
replaced without
removing
the
detector
from
the
pipe
or
draining
the
pipe.
10
replace
the
delay
mechanism1,
request
Part
No.
A3008-00.
For
switch
enclo
sure,
request
Part
No.
A77-01-02.
Do
not
repair
or
replace
any
other
waterilow
detector
components.
I[
any other
part
of
the
detector
does
not
perform
prop
erly,
replace
the
entire
detector.
Installation
methods
other
than
those
listed
in
this
installation
manual
may
prevent
the
device
from
reporting
the
flow ol
water
in
the
event
the
associated
sprinkler
system
is
activated
by
a
fire.
Sys*
45
JUL
NOTE: RETARD TIME MAY EXCEED 90 SECONDSADJUS
SE
NDS
ANOE APPROXMATE TIME DELAY IN
NUMBER ON OIALISA VOE 50o.
SECONDS WITH AN ACCURACY OF - 50%.
D770-01-0OC
156-0459-017C