Tyco RAPID RESPONSE Series Manual

RAPID RESPONSE Series LFII Residential Sprinklers
4.9 K-factor Recessed Pendent, Dry Type
Wet Pipe and Dry Pipe Systems
General
Description
The TYCO RAPID RESPONSE Series
LFII Dry Type Residential Recessed
Pendent Sprinklers (TY2235) are dry
type, decorative, fast response, fran-
gible bulb sprinklers designed for use
in residential occupancies such as
homes, apartments, dormitories, and
hotels.
The Series LFII Dry Type Residential
Recessed Pendent Sprinklers (TY2235)
are typically used for the following
situations:
• where sprinklers are required on dry
pipe systems that are exposed to
freezing temperatures; for example,
sprinkler drops from unheated por-
tions of buildings
• where sprinklers and/or a portion of
the connecting piping are exposed to
freezing temperatures; for example,
sprinkler drops from wet systems into
unheated areas
• where sprinklers are used on systems
that are seasonally drained to avoid
freezing; for example, vacation areas
The Series LFII Dry Type Residen-
tial Recessed Pendent Sprinklers are
intended for use in residential sprin-
kler systems for one- and two-family
dwellings and mobile homes per NFPA
13D; residential sprinkler systems for
residential occupancies up to and in-
cluding four stories in height per NFPA
13R; or, sprinkler systems for the resi-
dential portions of any occupancy per
NFPA 13.
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
installation can permanently dam-
age a sprinkler system or its compo-
nents and cause the sprinkler to fail
to operate in a fire situation or cause
it to operate prematurely.
Page 1 of 8
The Series LFII Dry Type Residential
Recessed Pendent Sprinklers provide
flexibility in adjusting sprinklers to the
fixed pipe drops. The Recessed Es-
cutcheon provides 1/4 inch (6,4 mm) of
recessed adjustment or up to 1/2 inch
(12,7 mm) of total adjustment from the
flush mounting surface position.
The Series LFII Dry Type Residential
Recessed Pendent Sprinklers are de-
signed with heat sensitivity and water
characteristics proven to help in con-
trolling residential fires and improving
the chance for occupants to escape or
be evacuated.
Dry Pipe System Application
The Series LFII Residential Pendent
and Recessed Pendent Sprinklers of-
fers a laboratory approved option for
designing dry pipe residential sprinkler
systems, whereas, most residential
sprinklers are laboratory approved for
wet systems only.
Through extensive testing, it has been
determined that the number of design
sprinklers (hydraulic design area) for
the Series LFII Residential Recessed
Pendent Sprinklers (TY2235) need not
be increased over the number of de-
sign sprinklers (hydraulic design area)
as specified for wet pipe sprinkler sys-
tems, as is accustomed for density/
area sprinkler systems designed per
NFPA 13.
Consequently, the Series LFII Resi-
dential Sprinklers offer the features of
non-water filled pipe in addition to not
having to increase the number of de-
sign 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.
NOTICE
The Series LFII Dry Type Residential
Recessed Pendent Sprinklers (TY2235)
described herein must be installed and
maintained in compliance with this
document and the applica ble stan­
dards of the National Fire Protection
Association, in addition to the stan­
dards of any authorities hav ing juris­
diction. Failure to do so may impair the
performance of these de vices.
APRIL 2013
www.tyco-fire.com
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
Identification
Number (SIN)
TY2235
TFP460