Tyco Rapidresponse LFII Series User manual

RAPID RESPONSE Series LFII Residential
4.9 K-factor Concealed Pendent Sprinkler
Flat Plate, Wet Pipe System
Page 1 of 6 NOVEMBER 2021 TFP446
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.
Worldwide
Contacts
www.tyco-fire.com
Scan the QR code or enter the URL
in a web browser to access the most
up-to-date electronic version of this
document. Data rates may apply.
docs.jci.com/tycofire/
rapid-response-4_9k
General
Description
The TYCO RAPID RESPONSE Series
LFII Residential 4.9K Concealed
Pendent Sprinklers (TY2534) are dec-
orative, glass bulb sprinklers, avail-
able in both ordinary 155°F (68°C) and
intermediate 200°F (93°C) tempera-
ture rated configurations. They are
designed for use in residential occu-
pancies such as homes, apartments,
dormitories, and hotels.
The cover plate assembly conceals
the sprinkler operating components
above the ceiling. The flat profile of the
cover plate provides the optimum aes-
thetically appealing sprinkler design.
In addition, the concealed design of
the Series LFII Residential Concealed
Pendent Sprinklers provides 3/4" (19,1
mm) vertical adjustment. This adjust-
ment provides a measure of flexibility
when cutting fixed sprinkler drops.
The Series LFII Residential Concealed
Pendent Sprinklers are intended for use
in the following scenarios:
• Wet pipe residential sprinkler sys-
tems for one and two family dwell-
ings and mobile homes per NFPA
13D
• Wet pipe residential sprinkler sys-
tems for residential occupancies up
to and including four stories in height
per NFPA 13R
• Wet pipe sprinkler systems for the
residential portions of any occu-
pancy per NFPA 13
The Series LFII Residential Concealed
Pendent Sprinklers have been designed
with heat sensitivity and water distri-
bution 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 Con-
cealed Pendent Sprinklers (TY2534)
are shipped with a Disposable Protec-
tive Cap. The Protective Cap is tem-
porarily removed for installation, and
then it can be replaced to help protect
the sprinkler while the ceiling is being
installed or finished. The tip of the Pro-
tective Cap can also be used to mark
the center of the ceiling hole into the
plaster board, ceiling tiles, and so on,
by gently pushing the ceiling product
against the Protective Cap. When the
ceiling installation is complete the Pro-
tective Cap is removed and the Cover
Plate Assembly is installed.
NOTICE
The Series LFII Residential Concealed
Pendent Sprinklers (TY2534) described
herein must be installed and main-
tained in compliance with this docu-
ment and with the applicable standards
of the NATIONAL FIRE PROTECTION
ASSOCIATION (NFPA), 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 main-
taining their fire protection system
and devices in proper operating con-
dition. Contact the installing contrac-
tor or product manufacturer with any
questions.
Sprinkler
Identification
Number (SIN)
TY2534

TFP446
Page 2 of 6
Technical
Data
Approvals
UL and C-UL Listed
The TYCO RAPID RESPONSE Series LFII
Residential Concealed Pendent Sprinklers
are Listed only when installed with LFII Con-
cealed Cover Plates having factory-applied
nishes.
Sprinklers and Cover Plates are separately
ordered. See the Ordering Procedure
section for more information.
Maximum Working Pressure
175 psi (12,1 bar)
Discharge Coefficient
K=4.9 GPM/psi½(70,6 LPM/bar½)
Temperature Rating
Ordinary
155°F (68°C) Sprinkler
139°F (59°C) Cover Plate
Note: Maximum Ambient Ceiling Tempera-
ture for the ordinary temperature congura-
tion is 100°F (38°C).
Intermediate
200°F (93°C) Sprinkler
165°F (74°C) Cover Plate
Note: Maximum Ambient Ceiling Tempera-
ture for the intermediate temperature con-
guration is 150°F (65°C).
Vertical Adjustment
3/4 in. (19,1 mm)
Finishes
See the Ordering Procedure section
Physical Characteristics
Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Brass
Support Cup . . . . . . . . . . . . . . . . . . .Plated Steel
Guide Pins . . . . . . . . . . . . . . . . . Stainless Steel
Deflector . . . . . . . . . . . . . . . . . . . . . . . . . .Bronze
Compression Screw . . . . . . . . . . . . . . . . . .Brass
Bulb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Glass
Button ...................Phosphor Bronze
Sealing Assembly ..Beryllium Nickel w/TEFLON
Cover Plate . . . . . . . . . . . . . . . . . . . . . . . . . Brass
Retainer . . . . . . . . . . . . . . . . . . . . . .Plated Steel
Cover Plate Ejection Spring . . . . Stainless Steel
Bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bronze
Bridge Ejection Spring . . . . . . . . . . . . INCONEL
Operation
When exposed to heat from a fire, the
Cover Plate, normally soldered to the
Retainer at three points, falls away to
expose the Sprinkler/Support Cup
Assembly.
The Deflector, supported by the Guide
Pins, then drops down to its operated
position.
The glass bulb contains a fluid that
expands when exposed to heat. When
the rated temperature is reached, the
fluid expands sufficiently to shatter the
glass bulb, activating the sprinkler and
allowing water to flow.
SPRINKLER
COVER PLATE
ASSEMBLY
ASSEMBLY PLATE
COVER
EJECTION
SPRING
DIMPLES
WITH THREAD
RETAINER
ASSEMBLY
SEALING
COMPRESSION
SCREW
POSITION)
(OPERATED
DEFLECTOR
FLUSH WITH
SURFACE IS
SUPPORT
CUP UNTIL
THREAD INTO
SOLDER
TAB
CEILING
DEFLECTOR
(1/2" NPT)
FRAME
ROLL FORMED
THREADS
CUP WITH
SUPPORT
GUIDE
PIN
MOUNTING
BRIDGE
FLATS
WRENCH
SPRINKLER
BUTTON
BULB
EJECTION
SPRING
BRIDGE
FIGURE 1
RAPID RESPONSE SERIES LFII RESIDENTIAL
CONCEALED PENDENT SPRINKLER (TY2534)

TFP446
Page 3 of 6
Design Criteria
The TYCO RAPID RESPONSE Series
LFII Residential Concealed Pendent
Sprinklers (TY2534) are UL and C-UL
Listed for installation in accordance
with this section.
Note: When conditions exist that are
outside the scope of the provided cri-
teria, refer to the Residential Sprinkler
Design Guide TFP490 for the manu-
facturer's recommendations that may
be acceptable to the authority having
jurisdiction.
Ceiling Types
Smooth flat horizontal, beamed, or
sloped in accordance with NFPA 13D,
13R, or 13 as applicable.
Hydraulic Design
(NFPA 13D and 13R)
For systems designed to NFPA 13D or
NFPA 13R, the minimum required sprin-
kler flow rates are given in Table A as a
function of temperature rating and the
maximum allowable coverage areas.
The 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.
Hydraulic Design
(NFPA 13)
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:
• The flow rates given in Table A as a
function of temperature rating and
the maximum allowable coverage
area
• A minimum discharge of 0.1 GPM/ft²
over the design area comprised of
the four most hydraulically demand-
ing sprinklers for actual coverage
areas protected by the four sprinklers
Obstruction to
Water Distribution
Sprinklers are to be located in accor-
dance with the obstruction rules of
NFPA 13D, 13R, and 13 as applicable
for residential sprinklers as well as with
the obstruction criteria described within
the Technical Data Sheet TFP490.
Operational Sensitivity
The sprinklers are to be installed rela-
tive to the ceiling mounting surface as
shown in Figure 2.
Sprinkler Spacing
The minimum spacing between sprin-
klers is 8 ft (2,4 m). The maximum
spacing between sprinklers cannot
exceed the length of the coverage area
(see Table A) being hydraulically calcu-
lated, for example, maximum 12 ft for a
12 ft x 12 ft coverage area, or 20 ft for
a 20 ft x 20 ft coverage area.
The Series LFII must not be used
in applications where the air pres-
sure above the ceiling is greater than
that below. Down drafts through the
Support Cup could delay sprinkler
operation in a re situation.
Maximum
Coverage
Area 1
ft x ft
(m x m)
Maximum
Spacing
ft
(m)
WET PIPE SYSTEM
Minimum Flow and Residual Pressure 2, 3
Temp. Rating
155°F (68°C), 200°F (93°C) Deflector to
Ceiling
Installation
Type
Minimum
Spacing
ft
(m)
Flow
GPM
(LPM)
Pressure
psi
(bar)
12 x 12
(3,7 x 3,7)
12
(3,7)
13
(49,2)
7.0
(0,48) Smooth
Ceilings
3/8 to 1 1/8 in.
Beamed
Ceilings per
NFPA 13D or
13R, or 13.
Installed in
beam
3/8 to 1 1/8 in.
below bottom
of beam
Concealed 8
(2,4)
14 x 14
(4,3 x 4,3)
14
(4,3)
13
(49,2)
7.0
(0,48)
16 x 16
(4,9 x 4,9)
16
(4,9)
13
(49,2)
7.0
(0,48)
18 x 18
(5,5 x 5,5)
18
(5,5)
17
(64,3)
12.0
(0,83)
20 x 20
(6,1 x 6,1)
20
(6,1)
20
(75,7)
16.7
(1,15)
Notes:
1. 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 criteria are stated.
2. Requirement is based on minimum ow in GPM (LPM) from each sprinkler. The associated residual pressures are calculated
using the nominal K-factor. See Hydraulic Design under the Design Criteria section.
3. For NFPA 13 residential applications, the greater of 0.1 GPM/ft² over the design area or the ow in accordance with the criteria in
this table must be used.
TABLE A
WET PIPE SYSTEM
SERIES LFII RESIDENTIAL 4.9 K-FACTOR FLAT PLATE CONCEALED PENDENT SPRINKLER (TY2534)
NFPA 13D, 13R, AND 13 HYDRAULIC DESIGN CRITERIA

TFP446
Page 4 of 6
Installation
The TYCO RAPID RESPONSE Series
LFII Residential Concealed Pendent
Sprinklers (TY2534) must be installed
in accordance with this section.
General Instructions
Do not install any bulb-type sprinkler
if the bulb is cracked or there is a loss
of liquid from the bulb, With the sprin-
kler held horizontally, a small air bubble
should be present.
A 1/2 in. NPT sprinkler joint should be
obtained with a minimum to maximum
torque of 7 to 14 lb-ft (9,5 to 19,0 N·m).
Higher levels of torque may distort the
sprinkler inlet with consequent leakage
or impairment of the sprinkler.
Do not attempt to compensate for
insufficient adjustment in the Cover
Plate Assembly by under-or over-
tightening the Sprinkler. Readjust the
position of the sprinkler fitting to suit.
Step 1. The sprinkler must only be
installed in the pendent position and
with the centerline of the sprinkler per-
pendicular to the mounting surface.
Step 2. Remove the Protective Cap.
Step 3. With pipe thread sealant
applied to the pipe threads and using
the W-Type 42 Wrench shown in Figure
3, position the wrench recess to first
straddle the deflector guide pins from
the side and then push the wrench into
the support cup to engage the sprin-
kler wrench flats. Rotate clockwise
to tighten the Sprinkler/Support Cup
Assembly into the fitting. The W-Type
42 Wrench will accept a 1/2 in. ratchet
drive.
Note: Do not engage the sprinkler
frame arms by the wrench, engage only
the sprinkler wrench flats.
Step 4. Replace the Protective Cap by
pushing it upwards until it bottoms out
against the Support Cup. The Protec-
tive Cap helps prevent damage to the
Deflector and Guide Pins during ceil-
ing installation and/or during applica-
tion of the finish coating of the ceiling.
It may also be used to locate the center
of the clearance hole by gently pushing
the ceiling material against the center
point of the Cap.
Note: As long as the protective Cap
remains in place, the system is consid-
ered to be “Out Of Service.”
Step 5. After the ceiling has been
completed with the 2 1/2 in. (63 mm)
diameter clearance hole and in prep-
aration for installing the Cover Plate
Assembly, remove and discard the Pro-
tective Cap, and verify that the Deflec-
tor moves up and down freely.
If the sprinkler has been damaged and
the Deflector does not move up and
down freely, replace the entire sprinkler
assembly. Do not attempt to modify or
repair a damaged sprinkler.
Step 6. Push on the Cover Plate
Assembly until its flange comes in con-
tact with the ceiling.
Do not continue to push on the Cover
Plate Assembly such that it lifts a
ceiling panel out of its normal position.
If the Cover Plate Assembly cannot
be engaged with the Mounting Cup
or the Cover Plate Assembly cannot
be engaged sufficiently to contact the
ceiling, the Sprinkler Fitting must be
repositioned.
PROTECTIVE CAP
DISPOSABLE
RETAINER
PLATE
COVER
SPRINKLER
OPERATED
ASSEMBLY
SUPPORT CUP
SPRINKLER-
THREADED
ADJUSTMENT
3/4" (19,1 mm)
DEFLECTOR IN
OPERATED POSITIONTIP
1-5/16" (33,3 mm)
9/16" (14,3 mm)
FACE OF
SPRINKLER
FITTING
(2,4 mm)
3/32" GAP
5/32"
(4,0 mm)
SURFACE
MOUNTING
2-1/2" DIA.
(63,5 mm)
COVER-
ASSEMBLY
RETAINER
SPRINKLER-
SUPPORT CUP
ASSEMBLY
2-1/8"±3/8"
±9,5 mm)
(54,0 mm
3-1/4" DIA.
(82,6 mm)
RECESS
WRENCH
DRIVE SOCKET
1/2" SQUARE
FIGURE 2
RAPID RESPONSE SERIES LFII RESIDENTIAL CONCEALED PENDENT SPRINKLER (TY2534)
INSTALLATION DIMENSIONS, PROTECTIVE CAP, AND ACTIVATED DEFLECTOR
FIGURE 3
W-T YPE 42
SPRINKLER WRENCH

TFP446
Page 5 of 6
Care and
Maintenance
The TYCO RAPID RESPONSE Series
LFII Residential Concealed Pendent
Sprinklers (TY2534) must be main-
tained and serviced in accordance with
this section.
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.
Absence of a Cover Plate may delay the
sprinkler operation in a fire situation.
When properly installed, there is an
air gap between the lip of the Cover
Plate and the ceiling. The Cover Plate
assembly has a nominal 3/32 (2,4 mm)
air gap, as shown in Figure 2. This air
gap is necessary for proper operation
of the sprinkler by allowing heat flow
from a fire to pass below and above the
Cover Plate to help assure appropriate
release of the Cover Plate in a fire situ-
ation. If the ceiling is to be repainted
after the installation of the Sprinkler,
care must be exercised to ensure that
the new paint does not seal off any of
the air gap.
Factory painted Cover Plates must not
be repainted. They should be replaced,
if necessary, by factory painted
units. Non-factory applied paint may
adversely delay or prevent sprinkler
operation in the event of a fire.
Do not pull the Cover Plate relative to
the Enclosure. Separation may result.
Sprinklers which are found to be
leaking or exhibiting visible signs of
corrosion must be replaced.
Automatic sprinklers must never be
painted, plated, coated, or otherwise
altered after leaving the factory. Modi-
fied or over heated sprinklers must be
replaced.
Care must be exercised to avoid
damage before, during, and after instal-
lation. Sprinklers damaged by drop-
ping, striking, wrench twist/slippage,
or the like, must be replaced.
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, for example, NFPA 25,
in addition to the standards of any other
authorities having jurisdiction. Contact
the installing contractor or product
manufacturer with any questions.
The owner must assure that the sprin-
klers are not used for hanging any
objects and that the sprinklers are only
cleaned by means of gently dusting
with a feather duster; otherwise, non-
operation in the event of a fire or inad-
vertent operation may result.
Automatic sprinkler systems should be
inspected, tested, and maintained by a
qualified Inspection Service in accor-
dance with local requirements and/or
national codes.
Limited
Warranty
For warranty terms and conditions, visit
www.tyco-fire.com.
Ordering
Procedure
Contact your local distributor for avail-
ability. When placing an order, indicate
the full product name and part number
(P/N).
Sprinkler Assemblies
Specify: Series LFII (TY2534) 4.9K Res-
idential Concealed Pendent Sprinkler,
P/N (specify):
155°F (68°C) ..................51-549-1-155
200°F (93°C) .................51-549-1-200
Note: Sprinkler and Cover Plates are
separately sold. See below for Cover
Plate ordering information.
Cover Plate Assemblies
Specify: LFII Concealed Sprinkler
Cover Plate Assembly, temperature
rating (specify), (specify) finish, P/N
(specify):
139°F (59°C)
Ivo r y ( R AL1015 ) . . . . . . . . . . . . . . . 56-891-0-135
Bright Chrome ...............56 - 891-9-135B
Beige (RAL1001) . . . . . . . . . . . . . . 56-891-2-135
Pure White (RAL9010)* . . . . . . . . . 56-891-3-135
Signal White (RAL9003)** . . . . . . . 56 - 891-4-135
Grey White (RAL9002) . . . . . . . . . . 56-891-5-135
Brown (RAL8028). . . . . . . . . . . . . . 56-891-6-135
Black (RAL9005) . . . . . . . . . . . . . . 56-891-7-135
Brushed Brass ................56-891-8-135
Brushed Chrome . . . . . . . . . . . . . . 56-891-9-135
Custom Paint .................56-891-X-135
165°F (74°C )
Ivo r y ( R AL1015 ) . . . . . . . . . . . . . . . 56- 891-0-165
Bright Chrome ...............56 -891-9-165B
Beige (RAL1001) . . . . . . . . . . . . . . 56-891-2-165
Pure White (RAL9010)* . . . . . . . . . 56-891-3-165
Signal White (RAL9003)** . . . . . . . 56-891-4-165
Grey White (RAL9002) . . . . . . . . . . 56-891-5-165
Brown (RAL8028). . . . . . . . . . . . . . 58-891- 6 -165
Black (RAL9005) . . . . . . . . . . . . . . 56 - 891-7-165
Brushed Brass ................56-891-8-165
Brushed Chrome . . . . . . . . . . . . . . 56-891-9-165
Custom Paint .................56-891-X-165
* Eastern Hemisphere sales only
** Previously known as Bright White
Note: All Custom Cover Plates are painted
using SHERWIN-WILLIAMS Interior Latex
Paint. Contact Johnson Controls Customer
Service with any questions related to custom
orders.
Sprinkler Wrench
Specify: W-Type 42 Sprinkler Wrench,
P/N 56-000-1-079

TFP446
Page 6 of 6
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© 2021 Johnson Controls. All rights reserved. All specifications and other information shown were current as of document revision date and are subject to change without notice.