Tyco WMA-1 Manual

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Model WMA-1 Water Motor Alarm
Hydraulically Operated
Mechanical Sprinkler Alarm
General
Description
The Model WMA-1 Water Motor Alarm
is a hydraulically operated outdoor
alarm designed for use with fire protec-
tion system waterflow detection
valves. It is lightweight yet rugged, and
it can be used in conjunction with
alarm check, dry pipe, deluge, and
preaction valves to sound a local
alarm.
The Water Motor Alarm is suitable for
mounting to any type of rigid wall and
can accommodate a wall thickness
range of 2 to 18 inches (50 to 450 mm).
It is provided with a listed and ap-
proved Model WM-1 Y-Strainer for use
in the alarm line.
The WMA-1 utilizes a lightweight, im-
peller design which can produce a very
high sound pressure level. The Gong,
Gong Mount, and Water Motor Hous-
ing are fabricated from corrosion resis-
tant aluminum alloys. The polymer
drive bearings do not require lubrica-
tion, and the Gong is closely fitted to
the Gong Mount to eliminate the need
for a separate cover.
The Model WMA-1 Water Motor Alarm
is a redesignation for the Central
Model F-2, Gem Model F630, and Star
Model S450.
WARNING
The Model WMA-1 Water Motor Alarm
described herein must be installed and
maintained in compliance with this
document, as well as with the applica-
ble standards of the National Fire Pro-
tection Association, in addition to the
standards of any other authorities hav-
ing jurisdiction. Failure to do so may
impair the performance of this de-
vice.
The owner is responsible for maintain-
ing their fire protection system and de-
vices in proper operating condition.
The installing contractor or sprinkler
manufacturer should be contacted
with any questions.
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Technical
Data
Approvals
UL and ULC Listed.
FM, LPCB, and VdS Approved.
Gong Finish
Red or Aluminum
Working Water Pressure Range
7 to 300 psi (0,5 to 20,7 bar)
Nozzle K-Factor
1/2
0.7 GPM/psi (10,1 LPM/bar
Y-Strainer
3/4 inch, cast iron, 20 mesh screen
Trim Components
Galvanized steel nipples and cast iron
fittings.
Design
Data
The Model WMA-1 Water Motor Alarm
must be used in accordance with the
following design criteria:
Item 1. The Y-Strainer is to be located
at the "alarm outlet" of the waterflow
detection valve trim.
Item 2. The Water Motor Alarm must
only be mounted to a rigid wall surface,
which will not permit the Striker/Gong
Mount to loosen and fall out of align-
ment.
Item 3. In order to obtain the highest
possible sound level, the Water Motor
Alarm should be located as close as
possible to the waterflow detecting
valve. (Refer to NFPA 13 for guidance.)
Item 4. The alarm line piping from the
alarm outlet of the waterflow detection
valve trim to the Water Motor Alarm
must be 3/4 inch size throughout and
it must be galvanized steel, brass, or
other suitable corrosion resistant ma-
terial.
Item 5. The alarm line piping must be
JULY, 2004
1/2
)
positioned such that it can be drained
back to the water flow detection valve
trim.
Item 6. The Clean-Out Sump Plug is to
be located vertically below the Inlet to
the Water Motor.
Item 7. Piping from the Water Motor
Drain must be a minimum of 1 inch in
size throughout and directed to an
open drain, in order to ensure proper
drainage for obtaining the maximum
sound pressure level.
The Water Motor Alarm Drain may be
connected to the main drain of a water
flow detection valve if a non-spring
loaded swing type check valve is in-
stalled in a horizontal portion of the
water motor alarm drain piping (before
its connection to the main drain).
Item 8. In order to minimize any wall
staining that can be created by drain
water, it is recommended that the drain
piping from the Water Motor be galva-
nized steel, brass, or other suitable
corrosion resistant material.
Item 9. Drain water must be directed
such that there will be no accidental
damage to property or danger to per-
sons when the alarm is operating or
thereafter.
Item 10. The alarm line drain (at the
NOTE
TFP921