General
Description
The Tyco
®
Rapid Response
™
Series
LFII (TY3596) Residential Concealed
Pendent Sprinklers are decorative, fast
response, fusible solder sprinklers de-
signed for use in residential occupan-
cies such as homes, apartments, dor-
mitories, and hotels.
The cover plate assembly conceals the
sprinkler operating components above
the ceiling. The flat profile of the cover
plate provides the optimum aestheti-
cally appealing sprinkler design. In
addition, the concealed design of the
Series LFII (TY3596) provides 1/4 inch
(6,4 mm) vertical adjustment. This ad-
justment provides a measure of flexi-
bility with regard to which the length of
fixed pipe drops to the sprinklers must
be cut.
The Series LFII are to be used in wet
pipe residential sprinkler systems for
one-and two-family dwellings and mo-
bile homes per NFPA 13D; wet pipe
residential sprinkler systems for resi-
dential occupancies up to and includ-
ing four stories in height per NFPA
13R; or, wet pipe sprinkler systems for
the residential portions of any occu-
pancy per NFPA 13.
The Series LFII (TY3596) has a 4.9
(60,5) K-factor that provides the re-
quired residential flow rates at reduced
pressures, enabling smaller pipe sizes
and water supply requirements.
The Series LFII (TY3596) has been de-
signed with heat sensitivity and water
distribution characteristics proven to
help in the control of residential fires
and to improve the chance for occu-
pants to escape or be evacuated.
The Series LFII (TY3596) Residen-
tial Concealed Pendent Sprinklers are
shipped with a Disposable Protective
Cap. The Protective Cap is temporar-
ily removed for installation, and then
it can be replaced to help protect the
sprinkler while the ceiling is being in-
stalled or finished. The tip of the Pro-
tective Cap can also be used to mark
the center of the ceiling hole into plas-
ter board, ceiling tiles, etc. by gently
pushing the ceiling product against
the Protective Cap. When the ceiling
installation is complete the Protective
Cap is removed and the Cover Plate
Assembly installed.
notice
The Series LFII (TY3596) Residential
Concealed Pendent Sprinklers de-
scribed herein must be installed and
maintained in compliance with this
document and with the applicable
standards of the National Fire Pro-
tection Association, in addition to the
standards of any authorities having ju-
risdiction. Failure to do so may impair
the performance of these devices.
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.
Sprinkler/Model
Identification
Number
SIN TY3596
Series LFII Residential
Concealed Pendent Sprinklers, Flat Plate
4.9 K-factor
Technical Services: Tel: (800) 381-9312 / Fax: (800) 791-5500
Page of 6
MAY, 2008
TFP442
iMPoRtAnt
Always refer to Technical Data
Sheet TFP700 for the “INSTALLER
WARNING” that provides cautions
with respect to handling and instal-
lation of sprinkler systems and com-
ponents. Improper handling and in-
stallation can permanently damage
a sprinkler system or its components
and cause the sprinkler to fail to
operate in a fire situation or cause it
to operate prematurely.
