Tyco LFII Series Quick Start Manual

Series LFII Residential Sprinklers
4.9 K-factor Domed-Plate Concealed Pendent
Wet Pipe and Dry Pipe Systems
IMPORTANT
Refer to Technical Data Sheet
TFP2300 for warnings pertaining to
regulatory and health information.
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 damage
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.
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res-4_9-k-domed-pen-wet-dry
General
Description
The TYCO Series LFII Residential
Domed-Plate Concealed Pendent 4.9
K-factor Sprinklers (TY2234) are dec-
orative, fast response, frangible bulb
sprinklers designed for use in residen-
tial occupancies such as homes, apart-
ments, dormitories, and hotels.
The Cover Plate/Retainer Assembly
conceals the sprinkler operating com-
ponents above the ceiling. The domed
profile of the cover plate provides aes-
thetically appealing sprinkler design
with lower flow rates than can be
achieved by lower profile cover plates.
Page 1 of 6
The separable two-piece design of the
Cover Plate and Support Cup Assem-
blies allows installation of the sprinklers
and pressure testing of the fire protec-
tion system prior to the installation of
the ceiling or application of a finish
coating.
Also, the separable "push-on and
thread-off" two-piece design of the
Sprinkler provides for 1/2 in. (12,7 mm
) of vertical adjustment.
The Series LFII Residential Sprinklers
(TY2234) are intended for use in the fol-
lowing 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
The Series LFII Residential Sprin-
klers have been designed with
heat sensitivity and water distribu-
tion characteristics proven to help in
the control of residential fires and to
improve the chance for occupants to
escape or be evacuated.
The Series LFII Residential Domed-
Plate Concealed Pendent Sprinklers
(TY2234) are shipped with a Dispos-
able Protective Cap. The Protective
Cap is temporarily removed for instal-
lation, and it must be replaced to
protect the sprinkler while the ceiling is
being installed or finished. The tip of the
Protective Cap can also be used to
mark the center of the ceiling hole into
plaster board or ceiling tiles by gently
pushing the ceiling product against the
Protective Cap. When ceiling installa-
tion is complete, the Protective Cap
must be removed and the Cover Plate
Assembly installed. The Protective Cap
must be removed to ensure proper
performance of the sprinklers.
Dry Pipe System Application
The Series LFII Residential Domed-
Plate Concealed Pendent Sprinklers
(TY2234) Listing offers a laboratory
MARCH 2022
Worldwide
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approved option for designing dry pipe
residential sprinkler systems, whereas,
most residential sprinklers are labora-
tory 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 Domed-
Plate Concealed Pendent Sprin-
klers (TY2234) need not be increased
over the number of design sprinklers
(hydraulic design area) as specified
for wet pipe sprinkler systems, as is
customary for density/area sprinkler
systems designed per NFPA 13.
Consequently, the Series LFII Resi-
dential Domed-Plate Concealed
Pendent 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.
NOTICE
The Series LFII Residential Domed-
Plate Concealed Pendent Sprinklers
(TY2234) described herein must be
installed and maintained in compliance
with this document and the applicable
standards of the NATIONAL FIRE PRO-
TECTION ASSOCIATION, in addition to
the standards of any authorities having
jurisdiction. Failure to do so may impair
the performance of these devices.
The owner is responsible for maintaining
their fire protection system and devices
in proper operating condition. Contact
the installing contractor or product
manufacturer with any questions.
TFP450