National Fire Protection Associa-
tion, in addition to the standards of
any other authorities having
jurisdiction. Failure to do so may
impair the integrity of these de-
vices.
Because of the above cited stipula-
tions and the varied nature of
residential type architecture, there
will be some compartment designs
which cannot be fully sprinklered in
accordance with the recomendations
of NFPA 13, NFPA 13D, or
NFPA 13R. In the event of this
condition, consult the authorities
having jurisdiction for guidance
and approval.
The owner is responsible for
maintaining their fire protection
system and devices in proper
operating condition. The installing
contractor or sprinkler manufac-
turer should be contacted relative
to any questions.
Sprinkler Identification Number
SIN C1296 - (155
°
F/68
°
C)
SIN C1297 - (175
°
F/68
°
C)
Approvals
UL & C-UL Listed. MEA (323-98-E)
(Refer to the Design Criteria Section)
Maximum Working Pressure
175 psi (12,1 bar)
Pipe Thread Connection
1/2 inch NPT
Discharge Coefficient
K = 3.0 GPM/psi
1/2
(43,2 LPM/bar
1/2
)
Temperature Ratings
155
°
F/68
°
C or 175
°
F/79
°
C
Finishes
Sprinkler: White Polyester, Chrome
Plated, or Natural Brass
Recessed Escutcheon: White Coated,
Chrome Plated, or Brass Plated
Tyco Fire Products --- www.centralsprinkler.com
451 North Cannon Avenue, Lansdale, Pennsylvania 19446 --- USA
Customer Service/Sales: Tel: (215) 362-0700 / Fax: (215) 362-5385
Technical Services: Tel: (800) 381-9312 / Fax: (800) 791-5500
Model LF
No. 4-1.0
3.0 K-factor -
Fast Response Residential
Pendent & Recessed Pendent Glass Bulb Automatic Sprinkler
General
Description
The Central Model LF, 3.0 K-factor
Residential Pendent and Recessed
Pendent sprinklers are decorative
glass bulb sprinklers designed for use
in residential occupancies such as
homes, apartments, dormitories, and
hotels.
They are to be used in wet pipe
residential sprinkler systems for one-
and two-family dwellings and mobile
homes per NFPA 13D; wet pipe
residential sprinkler systems for
residential occupancies up to and
including four stories in height per
NFPA 13R; or, wet pipe sprinkler
systems for the residential portions of
any occupancy per NFPA 13.
The Central Model LF Residential
Pendent Sprinklers have a 3.0 K-
factor which provides very low design
flow rates at reduced residual pres-
sures, enabling smaller pipe sizes and
water supply requirements.
The recessed version of the Model LF
Residential Pendent Sprinkler is
obtained by utilizing the Model LF
Residential Pendent Sprinkler in
combination with the Model BV Res./
QR Recessed Escutcheon Assembly.
The recessed version of the Central
Model LF using a Model BV Res./QR
Recessed Escutcheon provides up to
3/8 inch (9,5 mm) of total adjustment
from the flush pendent position.
Operation: The glass bulb contains a
fluid which expands when exposed to
heat. When the rated temperature is
reached, the fluid expands sufficiently
to shatter the glass bulb, which then
allows the sprinkler to activate and
flow water.
WARNING
The LF Residential Pendent Sprin-
klers described herein must be
installed and maintained in compli-
ance with this document, as well as
with the applicable standards of the
Technical
Data
CENTRAL
LF Pendent
7-02
Residential
Pendent and
Recessed
Pendent
Sprinklers
Physical Characteristics
The Model LF Residential Pendent
Sprinkler utilizes a dezincification
resistant (DZR) bronze frame and a
2.5 mm bulb for 175
°
F and a 3 mm
bulb for 155
°
F. The sprinkler frame
orifice is sealed with a gasketed
spring plate (Belleville Seal) consist-
ing of a beryllium nickel disc spring
that is sealed on both its inside and
outside edges with a Teflon
TM
gasket.
The compression screw is bronze,
and the deflector is brass.
SPRINKLERS FOR REPLACEMENT USE ONLY IN EXISTING SPRINKLER SYSTEMS
OBSOLETE
