Tyco WMA-1 Manual

Model WMA-1 Water Motor Alarm
Hydraulically-Operated Mechanical Sprinkler Alarm
European Conformity, 16 bar
General
Description
The TYCO Model WMA-1 Water Motor
Alarm is a hydraulically-operated
outdoor alarm designed for use with
fire protection system waterflow detec-
tion valves. It is lightweight yet rugged,
and can be used in conjunction with
alarm check, dry pipe, deluge, and pre-
action 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 thick-
ness range of 50 mm to 450 mm. It is
provided with a Listed and Approved
Model 74A Y-Strainer (P/N 305004) for
use in the alarm line.
The 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 with a brass nozzle
insert. The polymer drive bearings do
not require lubrication, and the Gong
is closely fitted to the Gong Mount to
eliminate the need for a separate cover.
NOTICE
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
PROTECTION ASSOCIATION (NFPA),
in addition to the standards of any other
authorities having jurisdiction. Failure
to do so may impair the performance
of these devices.
The owner is responsible for main-
taining their fire protection system
and devices in proper operating con-
dition. Contact the installing contrac-
tor or product manufacturer with any
questions.
IMPORTANT
Refer to Technical Data Sheet
TFP2300 for warnings pertaining to
regulatory and health information.
Page 1 of 4
Technical
Data
Approvals
FM and VdS Approved
CE Certified
Gong Finish
Red or Aluminum
Working Water Pressure Range
0,5 to 16,0 bar
Nozzle K-factor
10,1 Lpm/bar
½
Y-Strainer
DN20, bronze, 0,65 mm mesh screen
Trim Components
DN20 galvanized steel nipples and cast
iron fittings
Design
Criteria
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 inlet to the Water Motor Alarm
(Ref. Figure 2).
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 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.
Item 4. The alarm line piping from the
alarm outlet of the waterflow detection
valve trim to the Water Motor Alarm
must be DN20 in. 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.
AUGUST 2018
Worldwide
www.tyco-fire.com
Contacts
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 DN25 in.
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 non-
spring 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 galva-
nized steel, brass, or other suitable cor-
rosion-resistant material.
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 4°C.
TFP922