Tyco Fire Product CENTRAL LF User manual

must be installed and maintained in
compliance with this document, as
well as with the applicable standards
of the National Fire Protection
Association, in addition to the
standards of any other authorities
having jurisdiction. Failure to do so
may impair the integrity of these
devices.
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 main-
taining their fire protection system
and devices in proper operating
condition. The installing contractor
or sprinkler manufacturer should be
contacted relative to any questions.
Sprinkler Identification Number
SIN C1396
Approvals
UL & C-UL Listed. NYC Approved
(Refer to the Design Criteria Section)
Maximum Working Pressure
175 psi (12,1 bar)
Pipe Thread Connection
1/2 inch NPT
Discharge Coefficient
K = 3.5 GPM/psi1/2 (50,4 LPM/bar1/2)
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: [phone] / Fax: [phone]
Technical Services: Tel: [phone] / Fax: [phone]
Model LF
3.5 K-factor -
Fast Response Residential
Horizontal Sidewall & Recessed Horizontal Sidewall
Glass Bulb Automatic Sprinkler
No. 4-2.0
General
Description
The Central Model LF, 3.5 K-factor
Residential Horizontal Sidewall &
Recessed Horizontal Sidewall Sprin-
klers are decorative glass bulb sprin-
klers designed for use in residential
occupancies such as homes, apart-
ments, 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
Horizontal Sidewall & Recessed
Horizontal Sidewall Sprinklers have a
3.5 K-factor which provides very low
design flow rates at reduced residual
pressures, enabling smaller pipe sizes
and water supply requirements.
The recessed version of the Model LF
Residential Horizontal Sidewall
Sprinkler is obtained by utilizing the
Model LF Horizontal Sidewall 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 Horizontal Sidewall
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 Horizontal
Sidewall Sprinklers described herein
Technical
Data
CENTRAL LF Sidewall 7-02
Residential
Horiz. Sidewall
& Recessed
Horiz. Sidewall
Sprinklers
Physical Characteristics
The Model LF Residential Horizontal
Sidewall Sprinkler utilizes a dezincifica-
tion resistant (DZR) bronze frame and a
3 mm bulb. The sprinkler frame orifice is
sealed with a gasketed spring plate
(Belleville Seal) consisting of a beryllium
nickel disc spring that is sealed on both
its inside and outside edges with a
TeflonTM gasket. The compression
screw is bronze, and the deflector is
brass.
SPRINKLERS FOR REPLACEMENT USE ONLY IN EXISTING SPRINKLER SYSTEMS
OBSOLETE

Table 1 - LF Horizontal Sidewall and Recessed Horizontal
Sidewall Sprinkler Design Requirements for
NFPA 13D & NFPA 13R Occupancies
Minimum Design Flow (Pressure)
Coverage Multiple Deflector Temperature
Area Single Sprinkler Sprinklers Distance
*12' x 12' 14 GPM/16.0 psi 11 GPM/9.9 psi 4" - 12" 155°F/68°C
(3,7 m x 3,7 m) (53,1 lpm / 1,1 bar) (41,7 lpm / 0,7 bar) 175°F/79°C
*14' x 14' 14 GPM/16.0 psi 12 GPM/11.8 psi 4" - 12" 155°F/68°C
(4,3 m x 4,3 m) (53,1 lpm / 1,1 bar) (45,5 lpm / 0,8 bar) 175°F/79°C
*16' x 16' 16 GPM/20.9 psi 13 GPM/13.8 psi 4" - 6" 155°F/68°C
(4,9 m x 4,9 m) (60,6 lpm / 1,4 bar) (49,3 lpm / 1,0 bar) 175°F/79°C
‡16' x 16' 19 GPM/29.5 psi 18 GPM/26.4 psi 6" - 12" 155°F/68°C
(4,9 m x 4,9 m) (72 lpm / 2,0 bar) (68,2 lpm / 1,8 bar)
‡16' x 18' 19 GPM/29.5 psi 18 GPM/26.4 psi 4" - 12" 155°F/68°C
(4,9 m x 5,5 m) (72 lpm / 2,0 bar) (68,2 lpm / 1,8 bar)
* These flows and pressures are applicable for Smooth, Flat, Ceilings with
a Max. 8:12 Slope.
‡ These flows and pressures are applicable for Smooth, Flat, Ceilings with
a Max. 2:12 Slope.
Design
Criteria
Installation
The Central Model LF Horizontal Sidewall
Sprinklers must be installed in accordance
with the following instructions:
NOTES
Do not install any bulb type sprinkler if the
bulb is cracked or there is a loss of liquid
from the bulb. With the sprinkler held
horizontally, a small air bubble with an
approximate diameter of 1/16 inch should
be present.
A leak tight 1/2 inch NPT sprinkler joint
should be obtained with a torque of 7 to 14
ft.lbs. (9,5 to 19,0 Nm). A maximum of 21
ft.lbs. (28,5 Nm) of torque is to be used to
install 1/2 inch NPT sprinklers. Higher
levels of torque may distort the sprinkler
Model LF Horizontal Sidewall and
Recessed Horizontal Sidewall Sprinklers
are UL, C-UL Listed and NYC Approved
(MEA 323-98-E) for use in accordance
with current NFPA standards for use on
wet pipe sprinkler systems. These
sprinklers have been investigated for use
under smooth flat horizontal ceilings with
slopes up to 2 inches per foot, at spacings
up to 16 feet by 18 feet, using the design
requirements found in Table 1. These
sprinklers have also been investigated for
use under smooth flat sloping ceilings with
slopes up to 8 inches per foot, at spacings
up to 16 feet by 16 feet, using the design
requirements found in Table 1 as well as
the sloped ceiling "Specific Application
Design Criteria" found in Figure 1.
The Recessed Horizontal Sidewall
Sprinklers are only listed with the Series
BV Res./QR Recessed Escutcheon
Assembly.
The minimum required single and multiple
sprinkler flow rates for systems designed
to NFPA 13D or NFPA 13R occupancies
are given in Table 1. The single sprinkler
flow rate is the minimum required
discharge from the most hydraulically
demanding single sprinkler and, the
multiple sprinkler flow rate is the minimum
required discharge from each of the total
number of "design sprinklers" as specified
in NFPA 13D or NFPA 13R.
TIA 99-1 (Tentative Interim Ammendment)
with an effective date of May 22, 2000
states that the minimum required
discharge from each of the "design
sprinklers" for systems designed to NFPA
13 must be calculated based on delivering
a minimum design density of 0.1 gpm/sq.
ft. for each of the listed coverage areas
shown in Table 1. Consult the authority
having jurisdiction regarding the
application of this TIA to the currently
adopted NFPA 13.
Model LF Residential Horizontal Sidewall
and Recessed Horizontal Sidewall
Sprinklers must be installed using the
obstruction and minimum distance
between sprinkler criteria for extended
coverage sidewall sprinklers found the
current edition of NFPA 13.
NOTES
Residential Fire Sprinkler Systems
should only be designed and installed
by those competent and completely
familiar with automatic sprinkler
system design, installation procedures,
and techniques.
The sprinkler must be secured in
position by firmly fastening the
sprinkler system piping to the
structure. If the sprinkler is not
properly secured in position, reaction
forces resulting from sprinkler
operation could alter its orientation and
its water distribution pattern. The
sprinkler escutcheon cannot be used
to hold the sprinkler in position.
Several criteria may apply to the
installation and usage of each
sprinkler. Consequently, it is
recommended that the sprinkler
system designer review and develop a
working understanding of the
complete list of criteria prior to
initiating the design of the sprinkler
system.
Questions concerning sprinkler
installation and usage criteria, which
are not covered by the following
instructions, should be submitted to
Central Sprinkler. Include sketches
and technical details as appropriate.
In some instances, the requirements of
this document may concern
specifications which are more
stringent and which take precedence
over those specified in NFPA 13, NFPA
13D, NFPA 13R, or by the authority
having jurisdiction.
inlet with consequent leakage or impair-
ment of the sprinkler.
Step 1. The sprinkler must only be
installed in the sidewall position with the
centerline of the sprinkler parallel to the
ceiling and perpendicular to the wall. The
top of the deflector is to be positioned
towards the ceiling.
Step 2. After installing the BV Res./QR
Recessed Support Cup (or other accept-
able escutcheon, as applicable) over the
sprinkler pipe threads and with pipe thread
sealant applied to the pipe threads, hand
tighten the sprinkler into the sprinkler
fitting.
Step 3. Wrench tighten the sprinkler using
only a BV Sprinkler Wrench (1099). The
wrench recess of the BV Sprinkler Wrench
is to be applied to the sprinkler wrench
flats (Ref Figure 3).
Step 4. For Recessed Sidewall Sprinkler
Applications, a Protective Cap is available
which helps to prevent damage to the
sprinkler during ceiling/wall installation
and/or during application of the finish
coating of the ceiling/wall. Place the
Protective Cap over the Recessed
Support Cup and push it sideways until it
bottoms out against the sprinkler deflector.
NOTE
As long as the Protective Cap remains in
place, the system is considered to be "Out
of Service"
Step 5. After the ceiling/wall has been
completed , remove and discard the
Protective Cap. If the Sprinkler has been
damaged, replace the entire Sprinkler
assembly. Do not attempt to modify or
repair a damaged sprinkler.
Step 6. Push the outer ring of the
Recessed Escutcheon over the Re-
cessed Support Cup. If the Recessed
Escutcheon cannot be engaged with the
Support Cup or the Recessed Escutcheon
cannot be engaged sufficiently to contact
the wall, the Sprinkler Fitting must be
repositioned.
OBSOLETE

2-1/2" (63,5mm)
3/4" Max.
(19,1mm)
3/8" Min.
(9,5mm)
Face of
Reducing
Coupling
1-13/16" (46,0mm) Max.
Model BV Res./QR
Recessed Escutcheon
2-7/8" (73,0mm)
Support
Cup
Face of Wall
1-7/16" (36,5mm) Min.
1-1/2" (38,1mm)
Minimum Hole
in Wall is
2" (50,8mm),
Maximum is
2-1/2" (63,5mm)
1-13/16" (46,0mm)
Figure 1 - LF Sidewall Sloped Ceiling Design Guidelines
Sidewall Located at the Peak
• Locate sidewalls at the peak with their deflectors parallel to
the slope.
• Number of heads to be calculated shall conform to the
appropriate NFPA standard being used for design.
• Maximum number of sidewalls at the peak is unlimited.
• Cathedral ceiling applications: An 8" minimum beam or
lintel is required at the peak.
• a: minimum: 4" (101,6 mm)
maximum: one-half the maximum calculated spacing
• b: minimum: 8'-0" (2,4 m)
maximum: 16'-0" (4,9 m)
Sidewalls Located Along the Slope
• Up to three sidewalls along each side of the slope can be located with their deflectors parallel to the slope.
• All hydraulic criteria per the appropriate NFPA standard applies.
Note: If three sidewalls are present along one wall of one slope, all three must be calculated regardless of the NFPA
standard being used for design.
• Maximum number of sprinklers per compartment is six.
• For cathedral ceiling applications, an 8" minimum beam or lintel is required at the peak.
• a: minimum: 4" (101,6 mm)
maximum: one-half the maximum calculated spacing
32' MAX.
a
a
bb
16' MAX.
MEASURED
ALONG SLOPE
48' MAX.
8'-0"
MIN.
D = MAXIMUM
SLOPE
8:12 (33.7O)
D
D
MAXIMUM 8'-0" OPENING
ALLOWED IN PERIMETER WALLS
D = MAXIMUM
SLOPE
8:12 (33.7O)
abb
MEASURED
ALONG SLOPE
16' MAX.
48' MAX.
MAXIMUM 8'-0" OPENING
ALLOWED IN PERIMETER WALLS
ab
a
b
MEASURED
ALONG SLOPE
D
MAXIMUM 8'-0" OPENING
ALLOWED IN PERIMETER WALLS
a
• b: minimum: 8'-0" (2,4 m)
maximum: 16'-0" (4,9 m)
Figure 2 - Model LF Recessed Sidewall (bottom view)
Note: Central's Model 65 or 401 escutcheons may be used.
When using Central's Model 65 ceiling escutcheon, the
face of the reducing coupling should be 1/8"(3.2mm) ±1/
16"(1.6mm) beyond wall line.
Figure 3 - Model LF Sidewall
WRENCH
FLAT
ELEVATION VIEW
TOP OF DEFLECTOR
7/16"
(11,1 mm)
2-1/2 (63,5 mm)
1/2" NPT
7/16" (11,1 mm) MAKE-IN
OBSOLETE

Care must be exercised to avoid
damage - before, during, and after
installation. Sprinklers damaged by
dropping, striking, wrench twist/
slippage, or the like, must be replaced.
Also, replace any sprinkler that has a
cracked bulb or that has lost liquid from
its bulb (Ref. Installation Section).
The Central Model LF Horizontal
Sidewall Sprinklers must only be
replaced with sidewall sprinklers which
are listed for residential fire protection
service and which have the same
nominal K-factor, the same coverage
area, and the same or lower flow ratings
(as indicated under "Design Criteria").
When remodeling, such as by adding
false beams or light fixtures or changing
the location of compartment walls, first
verify that the new construction will not
violate the installation requirements
stated under WARNINGS. Alter the new
construction and/or the sprinkler system
to suit the requirements of this docu-
ment.
The owner is responsible for the
inspection, testing, and maintenance of
their fire protection system and devices
in compliance with this document, as
well as with the applicable standards of
the National Fire Protection Association
(e.g., NFPA 25), in addition to the
standards of any other authorities
having jurisdiction. The installing
contractor or sprinkler manufacturer
should be contacted relative to any
questions.
It is recommended that automatic
sprinkler systems be inspected, tested,
and maintained by a qualified Inspection
Service.
Printed in U.S.A. 7-02
Flow Control
Tyco Fire

Products
The Central Model LF must be main-
tained and serviced in accordance with
the following instructions:
NOTES
Wet pipe sprinkler systems must be
maintained at a minimum tempera-
ture of 40
° F/4 ° C to prevent freezing
and bursting of the pipe and/or
sprinklers.
Automatic sprinklers are not to be
tested with a heat source. Operation
of the heat responsive element (bulb)
can result.
Absence of an Escutcheon Plate may
delay the time to sprinkler operation
in a fire situation.
Before closing a fire protection
system main control valve for
maintenance work on the fire
protection system which it controls,
permission to shut down the affected
fire protection system must be
obtained from the proper authorities
and all personnel who may be
affected by this action must be
notified.
Do NOT enclose sprinklers within
drapes, curtains, or valances.
Do NOT hang anything from the
sprinklers.
Do NOT cleanse the sprinklers with
soap and water, detergents, ammo-
nia, cleaning fluids, or other chemi-
cals. Remove dust, lint, cobwebs,
cocoons, insects, and larvae by
gently brushing with a feather duster
or gently vacuuming with a soft
bristle (i.e., dusting) brush attach-
ment.
Exercise suitable safety precautions
in the use and storage of highly
flammable materials. The rapid rate
of fire development and spread of
which can be caused by such
materials can reduce the ability of
the sprinkler system to aid in the
control of a fire in which they are
involved.
Sprinklers which are found to be leaking
or exhibiting visible signs of corrosion
must be replaced.
Automatic sprinklers must never be
shipped or stored where its temperature
will exceed 100°F/38°C and they must
never be painted, plated, coated, or
otherwise altered after leaving the
factory. Modified sprinklers must be
replaced. Sprinklers that have been
exposed to corrosive products of
combustion, but have not operated,
should be completely cleaned by wiping
the sprinkler with a cloth or by brushing
it with a soft bristle brush.
Care &
Maintenance
Products manufactured by Tyco Fire
Products are warranted solely to the
original Buyer for ten (10) years against
defects in material and workmanship
when paid for and properly installed and
maintained under normal use and service.
This warranty will expire ten (10) years
from date of shipment by Tyco Fire
Products. No warranty is given for
products or components manufactured by
companies not affiliated by ownership with
Tyco Fire Products or for products and
components which have been subject to
misuse, improper installation, corrosion, or
which have not been installed, maintained,
modified or repaired in accordance with
applicable Standards of the National Fire
Protection Association, and/or the
standards of any other Authorities Having
Jurisdiction. Materials found by Tyco Fire
Products to be defective shall be either
repaired or replaced, at Tyco Fire
Products' sole option. Tyco Fire Products
neither assumes, nor authorizes any
person to assume for it, any other
obligation in connection with the sale of
products or parts of products. Tyco Fire
Products shall not be responsible for
sprinkler system design errors or inaccu-
rate or incomplete information supplied by
Buyer or Buyer's representatives.
IN NO EVENT SHALL TYCO FIRE
PRODUCTS BE LIABLE, IN CON-
TRACT, TORT, STRICT LIABILITY OR
UNDER ANY OTHER LEGAL THEORY,
FOR INCIDENTAL, INDIRECT, SPECIAL
OR CONSEQUENTIAL DAMAGES,
INCLUDING BUT NOT LIMITED TO
LABOR CHARGES, REGARDLESS OF
WHETHER TYCO FIRE PRODUCTS
WAS INFORMED ABOUT THE POSSI-
BILITY OF SUCH DAMAGES, AND IN
NO EVENT SHALL TYCO FIRE PROD-
UCTS' LIABILITY EXCEED AN AMOUNT
EQUAL TO THE SALES PRICE.
THE FOREGOING WARRANTY IS
MADE IN LIEU OF ANY AND ALL
OTHER WARRANTIES EXPRESS OR
IMPLIED, INCLUDING WARRANTIES
OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE.
Limited
Warranty
Ordering Information: When placing
an order, indicate the full product name.
Please specify the quantity, model,
style, orifice size, temperature rating,
type of finish or coating, and sprinkler
wrench. Refer to price list for complete
listing of Part Numbers.
Teflon is a trademark of the DuPont Corp.
Ordering
Information
OBSOLETE