Tyco LFII Series User manual

Lead-Free Rapid Response Series LFII Residential
4.9 K-factor Concealed Pendent Sprinkler
Flat Plate
Page 1 of 6 NOVEMBER 2021 TFP447
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
General
Description
The TYCO Lead-Free Rapid Response
Series LFII Residential 4.9 K-factor
Flat Plate Concealed Pendent Sprin-
kler (TY3534) is a decorative, glass
bulb sprinkler. The sprinkler is avail-
able in the following temperature rated
configurations:
• Ordinary 155°F (68°C)
• Intermediate 200°F (93°C)
The sprinkler is designed for homes
and mobile homes.
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 sprinkler provides 3/4 in. (19.1 mm)
vertical adjustment. This adjustment
provides a measure of flexibility when
cutting fixed sprinkler drops.
The sprinklers are intended for use in
the following scenarios:
• Wet pipe residential sprinkler sys-
tems for one and two family dwellings
and mobile homes per NFPA 13D
Note: The TYCO Lead-Free Rapid
Response Series LFII Residential 4.9
K-factor Flat Plate Concealed Pendent
Sprinkler can only be used in NFPA 13D
applications.
The sprinkler is designed with heat
sensitivity and water distribution char-
acteristics proven to help in the control
of residential fires and to improve the
chance for occupants to escape or be
evacuated.
Each sprinkler is shipped with a dis-
posable protective cap. The protective
cap is temporarily removed for installa-
tion, and then it can be replaced to help
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 the plaster board, ceiling tiles, and
so on, by gently pushing the ceiling
product against the protective cap.
When the ceiling installation is com-
plete the protective cap is removed and
the cover plate assembly is installed.
NOTICE
The TYCO Lead-Free Rapid Response
Series LFII Residential 4.9 K-factor
Flat Plate Concealed Pendent Sprin-
kler (TY3534) described herein must
be installed and maintained in compli-
ance with this document 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 perfor-
mance 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.
NOTICE
The TYCO Lead-Free Rapid Response
Series LFII Residential 4.9 K-factor Flat
Plate Concealed Pendent Sprinkler
(TY3534) must be installed in a TYCO
Rapid Seal Adapter. Use with all other
fittings is prohibited.
Sprinkler
Identification
Number (SIN)
TY3534

TFP447
Page 2 of 6
Technical
Data
Approvals
UL and C-UL Listed
Certified to all requirements of
NSF/ANSI 61
NSF/ANSI 372 - Lead-Free
Note: The TYCO Lead-Free Rapid
Response Series LFII Residential 4.9
K-factor Flat Plate Concealed Pendent
Sprinkler is listed only when installed
with LFII Concealed Cover Plates
having factory-applied finishes.
Note: Sprinklers and cover plates are
separately ordered. See the Order-
ing 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
*For wet pipe systems only
Note: Maximum Ambient Ceiling Tem-
perature for the ordinary temperature
configuration is 100°F (38°C)
Intermediate*
200°F (93°C) Sprinkler/
165°F ( 74°C) Cover Plate
*For wet pipe systems only
Note: Maximum Ambient Ceiling Tem-
perature for the intermediate tempera-
ture configuration is 150°F (65°C)
Vertical Adjustment
3/4 in. (19,1 mm)
Finishes
See the Ordering Procedure section
Physical Characteristics
Body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PPS*
Button . . . . . . . . . . . . . . . . . . . . . . . . . . . Copper
Button Insert . . . . . . . . . . . . . . . . . . . . . . .Bronze
Sealing Assembly ..Beryllium Nickel w/TEFLON
Compression Screw . . . . . . . . . . . . . . . . . .Brass
Bulb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Glass
Deflector . . . . . . . . . . . . . . . . . . . . . . . . . .Bronze
Guide Pins . . . . . . . . . . . . . . . . . Stainless Steel
Support Cup . . . . . . . . . . . . . . . . . . . . . . . Steel
Cover Plate . . . . . . . . . . . . . . . . . . . . . . . . .Brass
Retainer ................Plated Steel/Brass
Cover Plate Ejection Spring .... Stainless Steel
Bridge ............................Bronze
*PPS= Polyphenylene sulde
Operation
When exposed to heat from a fire, the
cover plate, which is normally soldered
to the retainer at three points, falls
away to expose the sprinkler assembly.
At this point the deflector supported by
the guide pins drops down to its oper-
ated position.
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, allowing the sprinkler to
activate and water to flow.
SPRINKLER
COVER PLATE
ASSEMBLY
ASSEMBLY PLATE
COVER
EJECTION
SPRING
THREAD
FLEXIBLE
WITH
ASSEMBLY
SEALING
COMPRESSION
SCREW
POSITION)
(OPERATED
DEFLECTOR
MOUNTING
CEILING
CUP UNTIL
FLANGE IS
INTO SUPPORT
SOLDER
TAB
SURFACE
DEFLECTOR
(1/2" NPT)
BODY
AREA
WRENCHING
SPRINKLER
ROLL FORMED
THREADS
CUP WITH
SUPPORT
BUTTON
GUIDE
PIN
FLUSH WITH
BULB
BRIDGE
OR PUSH
ASSEMBLY
THREAD
RETAINER
DIMPLES
FIGURE 1
LEAD-FREE RAPID RESPONSE
SERIES LFII RESIDENTIAL 4.9 K-FACTOR
FLAT PLATE CONCEALED PENDENT SPRINKLER (TY3534)

TFP447
Page 3 of 6
Design Criteria
The TYCO Lead-Free Rapid Response
Series LFII Residential 4.9 K-factor
Flat Plate Concealed Pendent Sprin-
kler (TY3534) is 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.
System Types
According to the UL and C-UL Listing,
the system types and the approved
sprinkler temperature rated configura-
tions are as follows:
Wet Pipe Systems
• Ordinary 155°F (68°C)
• Intermediate 200°F (93°C)
Ceiling Types
Smooth flat horizontal, beamed, or
sloped in accordance with NFPA 13D.
Hydraulic Design
The hydraulic design criteria for com-
plying with applicable NFPA standards,
and general hydraulic design criteria is
described in the section.
NFPA 13D
For systems designed to NFPA 13D the
minimum required sprinkler 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.
Obstruction to
Water Distribution
Sprinklers are to be located in accor-
dance with the obstruction rules of
NFPA 13D for residential sprinklers
as well as with the obstruction crite-
ria 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
calculated, for example, maximum
12 ft (3,6 m) for a 12 ft x 12 ft (3,6 m x
3,6 m) coverage area, or 20 ft (6,1 m)
for a 20 ft x 20 ft (6,1 m x 6,1 m) cover-
age area.
The sprinkler must not be used in appli-
cations where the air pressure 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
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
1/2 to 1 1/4 in.
Beamed
Ceilings per
NFPA 13D.
Installed in
beam
1/2 to 1 1/4 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
(63,5)
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.
TABLE A
WET PIPE SYSTEM
LEAD-FREE RAPID RESPONSE SERIES LFII RESIDENTIAL 4.9 K-FACTOR
FLAT PLATE CONCEALED PENDENT SPRINKLER (TY3534)
NFPA 13D HYDRAULIC DESIGN CRITERIA

TFP447
Page 4 of 6
Installation
The TYCO Lead-Free Rapid Response
Series LFII Residential 4.9 K-factor
Flat Plate Concealed Pendent Sprin-
kler (TY3534) must be installed in
accordance with this section.
General Instructions
Observe the following guidelines while
installing the sprinkler:
NOTICE
The TYCO Lead-Free Rapid Response
Series LFII Residential 4.9 K-factor Flat
Plate Concealed Pendent Sprinkler
(TY3534) must be installed in a TYCO
Rapid Seal Adapter. Use with all other
fittings is prohibited.
• To avoid damaging the glass bulb
during installation, handle the
sprinkler by the support cup only.
Do not apply pressure to the glass
bulb.
• The sprinkler is restricted to use
with the Rapid Seal Adapter line of
ttings.
• Do not attempt to compensate for
insufcient adjustment in the Cover
Plate Assembly by under-or over-
tightening the Sprinkler. Readjust
the position of the sprinkler tting
to suit.
PROTECTIVE CAP
DISPOSABLE
RETAINER
PLATE
COVER
SPRINKLER
OPERATED
ASSEMBLY
SUPPORT CUP
SPRINKLER-
THREADED
ADJUSTMENT
3/4" (19,1 mm)
DEFLECTOR IN
OPERATED POSITIONTIP
1-1/4" (31,8 mm)
1/2" (12,7 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
DETACHED
COVER PLATE
3-1/4" DIA.
(82,6 mm)
SUPPORT
CUP
TORQUE LIMITING
DRIVE BOSS
3/8" (10 mm)
ACCEPTS
SOCKET DRIVE
HEX CAVITY
ALIGN WRENCH
WITH SPRINKLER
FULLY SEATED IN
WRENCH
SUPPORT CUP
FREELY
DEFLECTOR
HANGING IN
WRENCH
CAVITY
WRENCHING AREA
HAND GRIP
ALIGNMENT
GUIDE PIN
RIDGE
TYCO RAPID
SEAL ADAPTER
FIGURE 2
LEAD-FREE RAPID RESPONSE SERIES LFII RESIDENTIAL 4.9 K-FACTOR
FLAT PLATE CONCEALED PENDENT SPRINKLER (TY3534)
INSTALLATION DIMENSIONS, PROTECTIVE CAP, AND ACTIVATED DEFLECTOR
FIGURE 3
LEAD-FREE RAPID RESPONSE
SERIES LFII RESIDENTIAL 4.9 K-FACTOR
FLAT PLATE CONCEALED PENDENT SPRINKLER (TY3534)
W-TYPE 43 SPRINKLER WRENCH

TFP447
Page 5 of 6
Installing the Sprinkler
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. Ensure the sprinkler threads
are clean and do not have thread
sealant such as tape or paste applied.
Avoiding cross-threading, gently
thread the sprinkler into the fitting and
hand tighten until the sprinkler makes
contact with the gasket.
Step 4. Orient the sprinkler as needed
by applying the W-Type 43 wrench
as shown in Figure 3 to the sprinkler
wrench flats, and tighten up to an addi-
tional full turn, or by applying up to a
maximum torque of 7 lb-ft (9,5 N∙m).
Note: The TYCO Lead-Free Rapid
Response Series LFII Residential 4.9
K-factor Flat Plate Concealed Pendent
Sprinkler (TY3534) Wrench is designed
to limit the maximum installation torque
and break at excessively high torque. In
the event that the wrench breaks, the
sprinkler should be inspected. A new
wrench should be used to remove the
sprinkler.
Note: There are two ridges on the top
of the W-Type 43 wrench that can be
used for reference when aligning the
sprinkler guide pins with the pipe.
Step 5. 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 ceiling
installation and/or during application 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 6. After the ceiling has been com-
pleted with the 2-1/2 in. (63 mm) diam-
eter clearance hole and in preparation
for installing the Cover Plate Assembly,
remove and discard the Protective Cap,
and verify that the Deflector falls to fully
operated position under its own weight.
If the sprinkler is damaged and the
deflector does not fall under its own
weight, replace the entire sprinkler
assembly. Do not attempt to modify or
repair a damaged sprinkler.
Step 7. Push on the Cover Plate
Assembly, and rotate as needed, until
its flange comes in contact 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.
Care and
Maintenance
The TYCO Lead-Free Rapid Response
Series LFII Residential 4.9 K-factor
Flat Plate Concealed Pendent Sprin-
kler (TY3534) must be maintained
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
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 situation. 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 such as 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.

TFP447
Page 6 of 6
NATIONAL FIRE PROTECTION ASSOCIATION and NFPA are registered trademarks of National Fire Protection Association;
TEFLON is a trademark of The Chemours Company FC, LLC
1400 Pennbrook Parkway, Lansdale, PA 19446 | Telephone [phone]
© 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.
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 (TY3534) 4.9K Res-
idential Concealed Pendent Sprinkler,
Temperature Rating (specify), P/N
(specify):
155°F (68°C) (Ordinary) . . . . . . . . . 50-451-1-155
200°F (93°C) (Intermediate). . . . . . 50-451-1-200
Note: Sprinkler and Cover Plates are
separately sold. See below for Cover
Plate ordering information.
Cover Plate Assemblies
Specify: Series LFII Concealed Sprin-
kler Cover Plate Assembly, tempera-
ture rating (specify), finish (specify),
P/N (specify):
139°F (59°C)
Iv or y ( R A L10 15 ) . . . . . . . . . . . . . . . 56 -891-0-135
Brass .......................56-891-1-135
Bright Brass .................56 -891-1-135B
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
Bright Chrome ...............56-891-9-135B
Custom Paint .................56 -891-X-135
165°F (74°C)
Iv or y ( R A L10 15 ) . . . . . . . . . . . . . . . 56-891-0 -165
Brass .......................56 - 891-1-165
Bright Brass .................56 -891-1-165B
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). . . . . . . . . . . . . . 56-891-6-165
Black (RAL9005) . . . . . . . . . . . . . . 56-891-7-165
Brushed Brass ................56-891-8-165
Brushed Chrome . . . . . . . . . . . . . . 56 - 891-9-165
Bright Chrome ...............56-891-9-165B
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 43 Sprinkler Wrench,
P/N 56-000-1-078