Tyco rapid response LFII Series Manual

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Series LFII Residential Sprinklers
Flat-Plate Concealed Pendent
4.9 K-Factor
General
Description
The TYCO RAPID RESPONSE Series
LFII Residential Flat-Plate Concealed
Pendent Sprinklers (TY2524) are decora-
tive, fast response, fusible solder sprin-
klers designed for use in residential oc-
cupancies such as homes, apartments,
dormitories, and hotels.
The Cover Plate/Retainer Assembly con-
ceals the sprinkler operating compo-
nents above the ceiling. The flat profile
of the Cover Plate provides the optimum
aesthetically appealing sprinkler design.
Additionally, the concealed design of the
Series LFII Residential Flat-Plate Con-
cealed Pendent Sprinklers provides 1/2
inch (12,8 mm) vertical adjustment. This
adjustment provides a measure of flex-
ibility when cutting fixed pipe drops.
The Series LFII Residential Flat-Plate
Concealed Pendent Sprinklers are in-
tended for use in the following systems:
• per NFPA 13D, wet pipe residential
sprinkler systems for one- and two-
family dwellings and mobile homes;
• per NFPA 13R, wet pipe residential
sprinkler systems for residential oc-
cupancies up to and including four
stories in height; and
• per NFPA 13, wet pipe sprinkler sys-
tems for the residential portions of
any occupancy.
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.
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The Series LFII Residential Flat-Plate
Concealed Pendent Sprinkler has a 4.9
(60,5) K-factor that provides the required
residential flow rates at reduced pres-
sures, enabling smaller pipe sizes and
water supply requirements.
This sprinkler has been designed with
heat sensitivity and water distribution
characteristics proven to help in the con-
trol of residential fires and to improve
the chance for occupants to escape or
be evacuated.
The Series LFII Residential Flat-Plate
Concealed Pendent Sprinklers are
shipped with a Disposable Protective
Cap. The Protective Cap protects the
sprinkler during ceiling installation or
finish. After ceiling installation is com-
plete, the Protective Cap is removed
and the Cover Plate/Retainer Assem-
bly is installed. Removing the Protec-
tive Cap is required for proper sprinkler
performance.
NOTICE
The Series LFII Residential Flat-Plate
Concealed Pendent Sprinklers (TY2524)
described herein must be installed and
maintained in compliance with this doc-
ument and with the applicable standards
of the National Fire Protection Associa-
tion, 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 in-
stalling contractor or sprinkler manu-
facturer should be contacted with any
questions.
Model/Sprinkler
Identification
Number (SIN)
TY2524
OCTOBER 2010
Technical
Data

Approvals

UL and C-UL Listed
NSF-61 Certified
The Series LFII Residential Flat-Plate
Concealed Pendent Sprinklers are only
listed with the Series LFII Concealed
Cover Plates having a factory-applied
finish.
Maximum Working Pressure
175 psi (12,1 bar)
Discharge Coefficient
K=4.9 GPM/psi (70,6 LPM/bar
1/2
Temperature Rating
Sprinkler: 160°F (71°C)
Cover Plate: 139°F (59°C)
Vertical Adjustment
1/2 inch (12,7 mm)
Finishes
Refer to the Ordering Procedure
section.

Physical Characteristics

• Cover Plate/Retainer Assembly:
Cover Plate . . . . . . . . . . . . . Copper
Ejection Spring . . . . Stainless Steel
Retainer . . . . . . . . . . . . . . . . Brass
)
1/2
TFP443