Series LFII Residential Sprinklers
4.2K Horizontal and Recessed Horizontal Sidewall
Wet Pipe and Dry Pipe Systems
Page 1 of 10
SEPTEMBER 2010
TFP410
Technical Services
800-381-9312 | +1-401-781-8220
www.tyco-fire.com
General
Description
The TYCO RAPID RESPONSE Series
LFII Residential Horizontal Sidewall
Sprinklers (TY1334) are decorative,
fast response, frangible bulb sprin-
klers designed for use in residential
occupancies such as homes, apart-
ments, dormitories, and hotels. When
aesthetics and optimized flow charac-
teristics are the major consideration,
the Series LFII Residential Sidewall
Sprinklers should be the first choice.
The Series LFII Residential Sprinklers
are intended for use in the following
scenarios:
• wet and dry pipe residential sprinkler
systems for one- and two-family
dwellings and mobile homes per
NFPA 13D
• wet and dry pipe residential sprinkler
systems for residential occupancies
up to and including four stories in
height per NFPA 13R
• wet and dry pipe sprinkler systems
for the residential portions of any
occupancy per NFPA 13
Historically residential sprinklers,
based on their Listing, have been
limited to wet pipe sprinkler systems
to assure speed of water delivery for a
given prescribed design area (number
of design sprinklers).
The Listing for the Series LFII
Residential Horizontal and Recessed
Horizontal Sidewall Sprinklers now
offers the laboratory approved option
of designing dry pipe residential
sprinkler systems.
Through extensive testing, it has been
determined that the number of design
sprinklers (hydraulic design area) for the
Series LFII Residential Sprinklers need
not be increased over the number of
design sprinklers (hydraulic design
area) as specified for wet pipe sprinkler
systems, as is accustomed for density/
area sprinkler systems designed per
NFPA 13.
Consequently,
the
Series
LFII
Residential Sprinklers offer the features
of non-water filled pipe in addition to
not having to increase the number of
design sprinklers (hydraulic design
area) for systems designed to NFPA
13, 13D, or 13R. Non-water filled pipe
will permit options for areas sensitive
to freezing
The Series LFII Residential Sprinklers
has a 4.2 (60,5) K-Factor that provides
the required residential flow rates
at reduced pressures, enabling
smaller pipe sizes and water supply
requirements.
The recessed version of the Series
LFII Residential Sprinklers is intended
for use in areas with finished walls.
It employs a two-piece Style 20
Recessed Escutcheon. The Recessed
Escutcheon provides 1/4 inch (6,4
mm) of recessed adjustment or up
to 1/2 inch (12,7 mm) of total adjust-
ment from the flush mounting surface
position. The adjustment provided by
the Recessed Escutcheon reduces the
accuracy to which the pipe nipples to
the sprinklers must be cut.
The Series LFII Residential Sprinklers
has been designed with heat sensitivity
and water distribution characteristics
proven to help in the control of residen-
tial fires and to improve the chance for
occupants to escape or be evacuated.
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
components. Improper handling and
installation 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
.
NOTICE
The Series LFII Residential Horizontal
Sidewall Sprinklers described herein
must be installed and maintained in
compliance with this document and
the applicable standards of the National
Fire Protection Association, in addition
to the standards of any authorities
having jurisdiction. Failure to do so
may impair the performance of these
devices.
Owners are responsible for maintaining
their fire protection system and devices
in proper operating condition. The
installing contractor or sprinkler manu-
facturer should be contacted with any
questions.
Model/Sprinkler
Identification
Number (SIN)
TY1334
