Tyco rapid response LFII Series User manual

Series LFII Residential Sprinklers
Flat-Plate Concealed Pendent
4.9 K-Factor
Page 1 of 6 OCTOBER 2010 TFP443
Technical Services 800-381-9312 | [phone]
www.tyco-fire.com
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 at prole
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 ex-
ibility when cutting xed 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.
The Series LFII Residential Flat-Plate
Concealed Pendent Sprinkler has a 4.9
(60,5) K-factor that provides the required
residential ow 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 res 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
nish. 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
Technical
Data
Approvals
UL and C-UL Listed
NSF-61 Certied
The Series LFII Residential Flat-Plate
Concealed Pendent Sprinklers are only
listed with the Series LFII Concealed
Cover Plates having a factory-applied
nish.
Maximum Working Pressure
175 psi (12,1 bar)
Discharge Coefficient
K=4.9 GPM/psi1/2 (70,6 LPM/bar1/2)
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
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.

TFP443
Page 2 of 6
• Sprinkler/Support Cup Assembly:
Body ................... Brass
Cap ................... Bronze
Saddle.................. Brass
Sealing Assembly . . . . . . .Beryllium
Nickel w/ Teon1
Soldered Link Halves . . . . . . Nickel
Lever .................. Bronze
Compression Screw . . . . . . . Brass
Deector . . . . . . . . . . . . . . . Bronze
Guide Pin Housing. . . . . . . . Bronze
Guide Pins . . . . . . . . . . . . . Bronze
Support Cup . . . . . . . . . . . . . . Steel
Operation
When exposed to heat from a re, the
Cover Plate, which is normally soldered
to the Retainer at three points, falls away
to expose the Sprinkler/Support Cup As-
sembly. At this point, the Deector, sup-
ported by the Guide Pins, drops down
to its operated position.
The Solder Link Element of the Sprinkler/
Support Cup Assembly is comprised of
two link halves that are soldered togeth-
er with a thin layer of solder. When the
rated temperature is reached, the sol-
der melts and the two link halves sepa-
rate, allowing the sprinkler to activate
and ow water.
1 Registered trademark of Dupont
Design
Criteria
The TYCO RAPID RESPONSE Series
LFII Residential Flat-Plate Concealed
Pendent Sprinklers (TY2524) are UL
and C-UL Listed for installation in ac-
cordance with the following criteria.
NOTICE
When conditions exist that are outside
the scope of the provided criteria, re-
fer to the Residential Sprinkler Design
Guide TFP490 for the manufacturer's
recommendations that may be accept-
able to the Authority Having Jurisdiction.
The Series LFII Residential Flat-Plate
Concealed Pendent Sprinklers must
not be used in applications where the
air pressure above the ceiling is greater
than that below. Down drafts through
the Support Cup can delay sprinkler op-
eration in a fire situation.
System Type
Only wet pipe systems may be utilized.
Hydraulic Design
Table A provides the minimum required
sprinkler ow rate for systems designed
to NFPA 13D or NFPA 13R as a function
of temperature rating and the maximum
allowable coverage areas. The sprinkler
ow rate is the minimum required dis-
charge from each of the total number of
“design sprinklers” as specied in NFPA
13D or NFPA 13R.
For systems designed to NFPA 13, the
number of design sprinklers is to be
the four most hydraulically demanding
sprinklers. The minimum required dis-
charge from each of the four sprinklers
is to be the greater of the following:
• ow rates given in Table A for NFPA
13D and 13R as a function of tem-
perature rating and the maximum al-
lowable coverage area
• minimum discharge of 0.1 GPM/
sq. ft. over the “design area” com-
prised of the four most hydraulically
demanding sprinklers for actual cov-
erage areas protected by the four
sprinklers
Obstruction To Water Distribution
Locate sprinklers in accordance with the
obstruction rules of NFPA for residential
sprinklers as well as obstruction criteria
described within TYCO technical data
sheet TFP490.
Operational Sensitivity
Install sprinklers relative to the ceiling
mounting surface as shown in Figure 3.
Sprinkler Spacing
The minimum spacing between sprin-
klers is 8 feet (2,4 m).
The maximum spacing between sprin-
klers cannot exceed the length of the
coverage area (Table A) being hydrau-
lically calculated; for example, a maxi-
mum of 12 feet for a 12 ft. x 12 ft. cov-
erage area or 20 feet for a 20 ft. x 20 ft.
coverage area.
(a) For coverage area dimensions less than or between those indicated, use the minimum required ow for the next highest coverage
area for which Hydraulic Design section under the Design Criteria are stated.
(b) The Minimum Flow requirement is based on minimum ow in GPM (LPM) from each sprinkler. The associated residual pressures
are calculated using the nominal K-factor. Refer to “Hydraulic Design” in the Design Criteria section for details.
TABLE A
SERIES LFII RESIDENTIAL FLAT-PLATE CONCEALED PENDENT SPRINKLER (TY2524)
NFPA 13D AND NFPA 13R HYDRAULIC DESIGN CRITERIA
WET PIPE SYSTEMS
Maximum
Coverage
Area (a)
Maximum
Spacing
Horizontal Ceiling
Minimum Flow(b) and
Residual Pressure
(Maximum 2-inch rise
for 12-inch run)
Sloped Ceiling
Minimum Flow(b) and
Residual Pressure
(Greater than 2-inch rise
up to maximum 4-inch
rise for 12-inch run)
Sloped Ceiling
Minimum Flow(b) and
Residual Pressure
(Greater than 4-inch rise
up to maximum 8-inch
rise for 12-inch run)
160°F (71°C)
Sprinkler
160°F (71°C)
Sprinkler
160°F (71°C)
Sprinkler
12' x 12'
(3,7 m x 3,7 m)
12'
(3,7 m)
13 GPM (49,2 LPM)
7.0 psi (0,48 bar)
17 GPM (64,3 LPM)
12.0 psi (0,83 bar)
17 GPM (64,3 LPM)
12.0 psi (0,83 bar)
14' x 14'
(4,3 m x 4,3 m)
14'
(4,3 m)
13 GPM (49,2 LPM)
7.0 psi (0,48 bar)
17 GPM (64,3 LPM)
12.0 psi (0,83 bar)
17 GPM (64,3 LPM)
12.0 psi (0,83 bar)
16' x 16'
(4,9 m x 4,9 m)
16'
(4,9 m)
13 GPM (49,2 LPM)
7.0 psi (0,48 bar)
17 GPM (64,3 LPM)
12.0 psi (0,83 bar)
17 GPM (64,3 LPM)
12.0 psi (0,83 bar)
18' x 18'
(5,5 m x 5,5 m)
18'
(5,5 m)
17 GPM (64,3 LPM)
12.0 psi (0,83 bar)
22 GPM (83,3 LPM)
20.2 psi (1,39 bar)
22 GPM (83,3 LPM)
20.2 psi (1,39 bar)
20' x 20'
(6,1 m x 6,1 m)
20'
(6,1 m)
20 GPM (75,7 LPM)
16.7 psi (1,15 bar)
24 GPM (90,8 LPM)
24.0 psi (1,65 bar)
24 GPM (90,8 LPM)
24.0 psi (1,65 bar)

TFP443
Page 3 of 6
FIGURE 3
PROTECTIVE CAP AND ACTIVATED DEFLECTOR
INSTALLATION DIMENSIONS
FIGURE 2
W-TYPE 18
SPRINKLER WRENCH
FIGURE 1
FLAT-PLATE CONCEALED PENDENT SPRINKLER (TY2524)
ASSEMBLY
PLATE
COVER
EJECTION
SPRING
DIMPLES
WITH THREAD
RETAINER
ASSEMBLY
SEALING
COMPRESSION
SCREW
POSITION)
(OPERATED
DEFLECTOR
FLUSH WITH
SURFACE IS
SUPPORT CUP
UNTIL MOUNTING
THREAD INTO
SOLDER
TAB
CEILING
DEFLECTOR
CAP
(1/2" NPT)
BODY
AREA
WRENCHING
SPRINKLER
SADDLE
ROLL FORMED
THREADS
CUP WITH
SUPPORT
ELEMENT
SOLDER LINK
LEVER
GUIDE
PIN
HOUSING
GUIDE PIN
SPRINKLER/SUPPORT CUP
COVER PLATE/RETAINER
ASSEMBLY
ASSEMBLY
(81,0 mm)
3-3/16" DIA.
1/2"
NPT
(63,5 mm)
2-1/2" DIA.
MOUNTING
SURFACE
(4,8 mm)
3/16"
1/8" GAP
(3,2 mm)
FITTING
SPRINKLER
FACE OF
7/8" (22,2 mm)
1-1/8" (28,6 mm)
TIP OPERATED POSITION
DEFLECTOR IN
1/2" (12,7 mm)
ADJUSTMENT
THREADED
SPRINKLER-
SUPPORT CUP
ASSEMBLY
OPERATED
SPRINKLER
1-7/8"±1/8"
±3,2 mm)
(47,6 mm
SPRINKLER-
SUPPORT CUP
ASSEMBLYASSEMBLY
COVER-
RETAINER
COVER
PLATE
RETAINER
DISPOSABLE
PROTECTIVE CAP
RECESS
WRENCH
WITH SPRINKLER
ENGAGEMENT
IN TO ENSURE
WRENCHING AREA
PUSH WRENCH

TFP443
Page 4 of 6
Installation
The TYCO RAPID RESPONSE Series
LFII Residential Flat-Plate Concealed
Pendent Sprinklers must be installed
in accordance with the following
instructions.
NOTICE
Damage to the Solder Link Element dur-
ing installation can be avoided by han-
dling the sprinkler by the Support Cup
only; that is, do not apply pressure to the
Solder Link Element (Figure 1).
Obtain a leak-tight 1/2 inch NPT sprinkler
joint by applying a minimum-to-maxi-
mum torque of 7 to 14 ft.-lbs. (9,5 to 19,0
Nm). Higher levels of torque can distort
the sprinkler inlet with consequent leak-
age or impairment of the sprinkler.
Do not attempt to compensate for in-
sufficient adjustment in the Cover Plate/
Retainer Assembly by under- or over-
tightening the sprinkler. Re-adjust the
position of the sprinkler fitting to suit.
1. Install pendent sprinklers in the
pendent position, with the center-
line of the sprinkler perpendicular
to the mounting surface.
2. Remove the Protective Cap.
3. With pipe-thread sealant applied
to the pipe threads, and using the
W-Type 18 Wrench shown in Figure
2, install and tighten the Sprinkler/
Support Cup Assembly into the t-
ting. The W-Type 18 Wrench ac-
cepts a 1/2 inch ratchet drive.
4. Replace the Protective Cap by
pushing it upwards until it bottoms
out against the Support Cup. The
Protective Cap helps prevent dam-
age to the Deector and Guide
Pins during ceiling installation and/
or during application of the nish
coating of the ceiling.
NOTICE
As long as the protective Cap re-
mains in place, the system is con-
sidered “Out Of Service”.
5. After the ceiling has been com-
pleted with the 2-1/2 inch (63 mm)
diameter clearance hole and in
preparation for installing the Cover
Plate/Retainer Assembly, remove
and discard the Protective Cap,
and verify that the Deector moves
up and down freely.
If the Sprinkler has been damaged
and the Deector does not move up
and down freely, replace the entire
Sprinkler assembly. Do not attempt to
modify or repair a damaged sprinkler.
6. Screw on the Cover Plate/Retainer
Assembly until its ange contacts
the ceiling.
Do not continue to screw on the
Cover Plate/Retainer Assembly such
that it lifts a ceiling panel out of its
normal position.
If the Cover Plate/Retainer Assembly
cannot be engaged with the Mounting
Cup or the Cover Plate/Retainer As-
sembly cannot be engaged sufciently
to contact the ceiling, the Sprinkler
Fitting must be repositioned.
Care and
Maintenance
The TYCO RAPID RESPONSE Series
LFII Residential Flat-Plate Concealed
Pendent Sprinkler (TY2524) must be
maintained and serviced in accordance
with the following instructions.
NOTICE
Before closing a fire protection system
main control valve for maintenance work
on the fire protection system that it con-
trols, obtain permission to shut down the
affected fire protection system from the
proper authorities and notify all person-
nel who may be affected by this action.
When properly installed, there is a nomi-
nal 1/8 inch (3,2 mm) air gap between
the lip of the Cover Plate and the ceil-
ing, as shown in Figure 3. This air gap
is necessary for proper operation of the
sprinkler by allowing heat ow from a
re to pass below and above the Cover
Plate to help assure appropriate release
of the Cover Plate in a re situation. If the
ceiling needs repainting after sprinkler
installation, exercise care to ensure that
the new paint does NOT seal off any of
the air gap. Failure to do so may impair
sprinkler operation.
Absence of a Cover Plate can delay the
sprinkler operation in a re situation.
Do not pull the Cover Plate relative to
the Enclosure. Separation may result.
Exercise care to avoid damage to sprin-
klers before, during, and after installa-
tion. Never paint, plate, coat, or other-
wise alter automatic sprinklers after they
leave the factory.
Never repaint factory-painted Cover
Plates. When necessary, replace cover
plates with factory-painted units. Non-
factory applied paint can adversely de-
lay or prevent sprinkler operation in the
event of a re.
Replace sprinklers that:
• were damaged by dropping, striking,
wrench twisting, wrench slippage, or
the like.
• were modied or over-heated.
• are leaking or exhibiting visible signs
of corrosion.
Responsibility lies with owners for the
inspection, testing, and maintenance of
their re protection system and devices
in compliance with this document, as
well as with the applicable standards of
the National Fire Protection Association
(for example, NFPA 25), in addition to
the standards of any other authorities
having jurisdiction. Contact the install-
ing contractor or sprinkler manufacturer
regarding any questions.
Automatic sprinkler systems are rec-
ommended to be inspected, tested,
and maintained by a qualied Inspec-
tion Service in accordance with local
requirements and/or national codes .

TFP443
Page 5 of 6
Limited
Warranty
Products manufactured by Tyco Fire
Suppression & Building Products
(TFSBP) are warranted solely to the orig-
inal Buyer for ten (10) years against de-
fects in material and workmanship when
paid for and properly installed and main-
tained under normal use and service.
This warranty will expire ten (10) years
from date of shipment by TFSBP. No
warranty is given for products or com-
ponents manufactured by companies
not afliated by ownership with TFSBP
or for products and components which
have been subject to misuse, improper
installation, corrosion, or which have not
been installed, maintained, modied 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 TFSBP to be defec-
tive shall be either repaired or replaced,
at TFSBP’s sole option. TFSBP neither
assumes, nor authorizes any person to
assume for it, any other obligation in
connection with the sale of products or
parts of products. TFSBP shall not be
responsible for sprinkler system design
errors or inaccurate or incomplete in-
formation supplied by Buyer or Buyer’s
representatives.
In no event shall TFSBP be liable, in con-
tract, tort, strict liability or under any oth-
er legal theory, for incidental, indirect,
special or consequential damages, in-
cluding but not limited to labor charg-
es, regardless of whether TFSBP was
informed about the possibility of such
damages, and in no event shall TFSBP’s
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 mer-
chantability and tness for a particular
purpose.
This limited warranty sets forth the ex-
clusive remedy for claims based on fail-
ure of or defect in products, materials or
components, whether the claim is made
in contract, tort, strict liability or any oth-
er legal theory.
This warranty will apply to the full extent
permitted by law. The invalidity, in whole
or part, of any portion of this warranty
will not affect the remainder.
Ordering
Procedure
Contact your local distributor for avail-
ability. When placing an order, indicate
the full product description and Part
Number (P/N).
Sprinkler/Support Cup Assembly
Specify: Series LFII Residential Flat-
Plate Concealed Pendent Sprinkler
(TY2524), K=4.9, without Cover Plate/
Retainer Assembly, P/N 51-114-1-160.
Cover Plate/Retainer Assembly
Specify: Cover Plate/Retainer Assem-
bly with nish (below) for the Series
LFII Residential Flat-Plate Concealed
Pendent Sprinkler (TY2524), K=4.9, P/N
(below):
Chrome . . . . . . . . . . . . . . . . . . P/N 56-201-9-135
Custom . . . . . . . . . . . . . . . . . . .P/N 56-201-X-135
Off White . . . . . . . . . . . . . . . . P/N 56-201-0-135
Pure White*
(RAL 9010) . . . . . . . . . . . . . . . . P/N 56-201-3-135
Signal White**
(RAL 9003) . . . . . . . . . . . . . . . P/N 56-201-4-135
Standard White (Grey White)
(RAL9002) . . . . . . . . . . . . . . . . P/N 56-201-5-135
* Eastern Hemisphere sales only.
** Previously known as Bright White.
Note: All Custom Cover Plates are
painted using Sherwin Williams Interior
Latex Paint. Contact TYCO Customer
Service with any questions related to
custom orders.
Sprinkler Wrench
Specify W-Type 18 Sprinkler Wrench,
P/N 56-000-1-265.

TFP443
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