Tyco WMA-1 User Manual
Model WMA-1 Water Motor Alarm
Hydraulically Operated
Mechanical Sprinkler Alarm
Worldwide
Contacts
www.tyco-fire.com
General
Description
The TYCO Model WMA-1 Water Motor
Alarm is a hydraulically operated
outdoor alarm designed for use with
fire protection 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 in. to 18 in. (50 mm
to 450 mm). It is provided with a listed
and approved TYCO Model WMA-1
Y-Strainer for use in the alarm line.
The Model WMA-1 utilizes a lightweight,
impeller design that can produce a very
high sound pressure level. The Gong,
Gong Mount, and Water Motor Housing
are fabricated from corrosion-resistant
aluminum alloys. The polymer drive
bearings do not require lubrication, and
the Gong is closely fitted to the Gong
Mount to eliminate the need for a separa te cover.
The Model WMA-1 Water Motor Alarm
is a re-designation for the Central
Model F-2, Gem Model F630, and Star
Model S450.
NOTICE
The TYCO Model WMA-1 Water Motor
Alarm described herein must be
installed and maintained in compliance
with this document, as well as with the
applicable standards of the NATIONAL
FIRE PROTECTION ASSOCIATION
(NFPA), in addition to the standards
of any authorities having jurisdiction.
Failure to do so may impair the performance of this device.
IMPORTANT
Refer to Technical Data Sheet
TFP2300 for warnings pertaining to
regulatory and health information.
The owner is responsible for maintaining their fire protection system
and devices in proper operating condition. Contact the installing contractor or product manufacturer with any
questions.
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
0.7 gpm/psi½ (10,1 Lp m / b ar½)
Y-Strainer
3/4 in., cast iron, 20 mesh screen
Trim Components
Galvanized steel nipples and cast iron
ttings
Design
Data
The TYCO 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 that will not permit the
Striker /Gong Mount to loosen and fall
out of alignment.
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. For guidance, refer to NFPA 13.
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 in. (DN20) in size throughout and it must be galvanized steel,
brass, or other suitable corrosion-resistant material.
Item 5. The alarm line piping must be
positioned such that it can be drained
back to the waterflow 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 in.
(DN25) in size throughout and directed
to an open drain in order to ensure
proper drainage for obtaining the
maximum sound pressure level.
Note: The Water Motor Alarm Drain
may be connected to the main drain
of a waterflow detection valve if a nonspring loaded swing-type check valve
is installed 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 galvanized steel, brass, or other suitable corrosion-resistant material.
Page 1 of 4 AUGUST 2018 TFP921
TFP921
Page 2 of 4
NO. DESCRIPTION REF.
1
Water Motor 92-630-1-012
2
Support Washer
3
Drive Shaft Sleeve
4
Drive Shaft
5
Gong Mount
6
7
8
(a)
(a)
NR: Not Replaceable
. . . . . . . . . . .
Gong
. . . . . . . . . . . .
Cap Nut
Red Gong Repair
Kit includes items:
Aluminum Gong Repair
Kit includes items:
6, 7 (alum.), and 8
7
. . . . . . . . .
. . . . . .
. . .
. . . . . . .
. . . . . .
. . .
QTY.
.
. .
1
1
1
1
1
1
1
1
1
1
6
NR
NR
NR
NR
See (a)Striker
See (a)
See (a)
92-630-1-0256, 7 (red), and 8
92-630-2-025
STRIKER ARM
COUPLING
SPACER
COUPLING
3/4" NPS
STRIKER
SHAFT
STRIKER
RING
CROSS-SECTION VIEW
OF STRIKER (ITEM 6)
BEARING
4
2
1
3
IMPELLER
8
Item 9. Drain water must be directed to
prevent accidental damage to property
or danger to persons when the alarm is
operating or thereafter.
Item 10. The alarm line drain, at the
waterflow detection valve, must be
maintained at a minimum temperature
of 40°F (4°C).
Item 11. A single Water Motor Alarm
may be connected to the alarm lines
from a maximum of three separate fire
protection systems. However, when
two or three alarm lines are interconnected, each alarm line must be provided with the following:
• 3/4 in. Model WM-1 Y-Strainer
(P/N 52-271-1001)
NOZZLE
INLET
5
FIGURE 1
MODEL WMA-1 WATER MOTOR ALARM
AS S E M B LY
•
3/4 in. Check Valve with 3/32 in.
orice (P/N 52-403-1-005)
Strainers must be located at the alarm
outlet in the trim of each of the waterflow detection valves. Check valves
must be located between each strainer
and the interconnection with the alarm
line from another system.
Operation
Upon operation of the alarm check,
dry pipe, deluge, or preaction valve to
which the TYCO Model WMA-1 Water
Motor Alarm is connected, water will
flow to the Water Motor and through
the Inlet Nozzle. As water flows through
DRAIN
INTERNAL VIEW OF
WATER MOTOR (ITEM 1)
the Inlet Nozzle, a high velocity jet is
formed that impinges on the Impeller,
causing the Impeller and the Striker
to rotate. With each rotation, the free
swinging Striker Ring hits the Gong and
sounds the alarm. The spent water is
then drained through the 1 in. outlet.
The alarm will sound as long as water
is flowing into the system and flowing
to the Water Motor Alarm. Water in the
alarm line will automatically drain back
through the orifice, which is also provided in the trim of the waterflow detection valve.
The Water Motor Alarm does not have
to be reset after an operation. However,
if the alarm was silenced during oper-
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