Tyco rapid response LFII Series User manual

Series LFII Residential, NFPA 13 Optimized
Pendent, Recessed, and Concealed Sprinklers
6.9 K-factor, 3/4” NPT
Page 1 of 8 AUGUST 2011 TFP408
Technical Services 800-381-9312 | [phone]
www.tyco-fire.com
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.
General
Description
The TYCO RAPID RESPONSE Series
LFII Residential Pendent, Recessed
Pendent, and Concealed Pendent
Sprinklers (TY4234) are decorative,
fast response, frangible bulb sprin-
klers designed for use in residential
occupancies such as homes, apart-
ments, dormitories, and hotels. When
enhanced ow characteristics for resi-
dential portions of any occupancy per
NFPA 13 is the major consideration,
the Series LFII (TY4234) should be the
rst choice.
When higher ow demands are re-
quired for residential sprinklers used
in an NFPA 13 design, the large 6.9 K-
factor of the Series LFII sprinkler is an
attractive choice. Although primarily
intended where residential sprinklers
are to be used in an NFPA 13 design,
the Series LFII sprinkler can also be
used in wet pipe residential sprinkler
systems for one-and two-family dwell-
ings and mobile homes per NFPA 13D,
and wet pipe residential sprinkler sys-
tems for residential occupancies up to
and including four stories in height per
NFPA 13R.
The recessed version of the sprinkler
is intended for use in areas with n-
ished ceilings. It employs a two-piece
Style 30 Recessed Escutcheon. The
Recessed Escutcheon provides 1/4
inch (6,4 mm) of recessed adjustment
or up to 1/2 inch (12,7 mm) of total ad-
justment from the ush mounting sur-
face position. The adjustment pro-
vided by the Recessed Escutcheon
or Concealed Cover Plate provides a
measure of exibility with regard to
which the length of xed pipe drops to
the sprinklers must be cut.
The concealed version utilizes a cov-
er plate assembly that conceals the
sprinkler operating components above
the ceiling. The separable two-piece
design of the Cover Plate and Support
Cup Assemblies allows installation of
the sprinklers and pressure testing of
the re protection system prior to the
installation of the ceiling or application
of a nish coating.
Also, the separable “push-on and
thread-off” two-piece design of the
concealed version provides for 1/2
inch (12,7 mm ) of vertical adjustment.
The Series LFII Residential Concealed
Pendent Sprinklers (TY4234) are
shipped with a Disposable Protective
Cap. The Protective Cap is temporar-
ily removed for installation, and it must
be replaced to protect the sprinkler
while the ceiling is being installed or
nished. The tip of the Protective Cap
can also be used to mark the center
of the ceiling hole into plaster board,
ceiling tiles, etc. by gently pushing the
ceiling product against the Protective
Cap. When ceiling installation is com-
plete, the Protective Cap must be re-
moved and the Cover Plate Assem-
bly installed. The Protective Cap must
be removed to ensure proper perfor-
mance of the sprinklers.
The Series LFII Sprinkler has been de-
signed with heat sensitivity and water
distribution characteristics proven to
help in the control of residential res
and to improve the chance for occu-
pants to escape or be evacuated.

TFP408
Page 2 of 8
NOTICE
The Series LFII (TY4234) Residential
Pendent, Recessed Pendent, and
Concealed Pendent Sprinklers de-
scribed herein must be installed and
maintained in compliance with this
document and with the applicable
standards of the National Fire Pro-
tection Association, in addition to the
standards of any authorities having ju-
risdiction. Failure to do so may impair
the performance of these devices.
Owners are responsible for maintain-
ing their fire protection system and
devices in proper operating condition.
The installing contractor or sprinkler
manufacturer should be contacted
with any questions.
Model/Sprinkler
Identification
Number (SIN)
TY4234
Technical
Data
Approvals:
UL and C-UL Listed
Refer to Table A and the Design
Criteria section — Pendent Recessed
Pendent, and Concealed Pendent.
FM Approved
Refer to Table B and the Design
Criteria section — Pendent and
Recessed Pendent.
NYC Approved under MEA 44-03-E-2.
The Series LFII Concealed Pendent
Sprinklers are only listed and ap-
proved with the Series LFII Concealed
Cover Plates having a factory applied
nish.
Maximum Working Pressure:
175 psi (12,1 bar)
Discharge Coefficient:
K=6.9 GPM/psi1/2 (99,4 LPM/bar1/2)
Pipe Thread Connection:
3/4 NPT
Sprinkler Temperature Rating:
• Pendent and Recessed Pendent:
155°F/68°C or 175°F/79°C
• Concealed Pendent:
155°F/68°C
w/139°F/59°C Cover Plate*
175°F/ 79°C
w/139°F/59°C Cover Plate*
*Suitable for use with maximum
100°F/38°C ceiling temperature.
Finishes:
• Sprinkler:
White Polyester Coated,
Chrome Plated, or Natural Brass
• Recessed Escutcheon:
White, Chrome, or Brass
• Concealed Cover Plate:
Refer to Ordering Procedure
section.
Maximum
Coverage
Area (a)
Ft. x Ft.
(m x m)
Maximum
Spacing
Ft. (m)
Minimum Flow and Residual Pressure (b)
For Horizontal Ceiling (c, d, e)
(Max. 2 Inch Rise for 12 Inch Run)
For Sloped Ceiling (c, d, e)
(Greater Than 2 Inch Rise for 12 Inch Run
Up To Max. 8 Inch Rise for 12 Inch Run)
Pendent and
Recessed Pendent
Concealed
Pendent
Pendent and
Recessed Pendent
Concealed
Pendent
155°F/68°C or
175°F/79°C
155°F/68°C or
175°F/79°C
155°F/68°C or
175°F/79°C
155°F/68°C or
175°F/79°C
12 x 12
(3,7 x 3,7)
12
(3,7)
19 GPM (71,9 LPM)
7.6 psi (0,52 bar)
19 GPM (71,9 LPM)
7.6 psi (0,52 bar)
19 GPM (71,9 LPM)
7.6 psi (0,52 bar)
19 GPM (71,9 LPM)
7.6 psi (0,52 bar)
14 x 14
(4,3 x 4,3)
14
(4,3)
19 GPM (71,9 LPM)
7.6 psi (0,52 bar)
19 GPM (71,9 LPM)
7.6 psi (0,52 bar)
19 GPM (71,9 LPM)
7.6 psi (0,52 bar)
19 GPM (71,9 LPM)
7.6 psi (0,52 bar)
16 x 16
(4,9 x 4,9)
16
(4,9)
19 GPM (71,9 LPM)
7.6 psi (0,52 bar)
19 GPM (71,9 LPM)
7.6 psi (0,52 bar)
19 GPM (71,9 LPM)
7.6 psi (0,52 bar)
19 GPM (71,9 LPM)
7.6 psi (0,52 bar)
18 x 18
(5,5 x 5,5)
18
(5,5)
19 GPM (71,9 LPM)
7.6 psi (0,52 bar)
21 GPM (79,5 LPM)
9.3 psi (0,64 bar)
19 GPM (71,9 LPM)
7.6 psi (0,52 bar)
24 GPM (91,8 LPM)
12.1 psi (0,83 bar)
20 x 20
(6,1 x 6,1)
20
(6,1)
22 GPM (83,3 LPM)
10.2 psi (0,70 bar)
24 GPM (90,8 LPM)
12.1 psi (0,83 bar)
24 GPM (91,8 LPM)
12.1 psi (0,83 bar)
24 GPM (91,8 LPM)
12.1 psi (0,83 bar)
(a) For coverage area dimensions less than or between those indicated, it is necessary to use the minimum required ow for the next highest
coverage area for which hydraulic design criteria are stated.
(b) 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 Criteria Section for details. For NFPA 13D 2010 applications, Horizontal Ceiling criteria shall be used for
sloped ceilings up to 8:12 pitch. Refer to TIA 1028R for actual sloped ceiling parameters allowed.
(c) For NFPA 13D 2010 applications, Horizontal Ceiling criteria shall be used for certain sloped ceiling congurations up to 8:12 pitch.
Refer to TIA 1028R for allowed sloped ceiling limitations when using horizontal ceiling criteria.
(d) For NFPA 13R applications, Horizontal Ceiling criteria may be used for sloped ceiling congurations up to 8:12 pitch when acceptable to the
Local Authority Having Jurisdiction.
(e) For NFPA 13 residential applications, the greater of 0.1 GPM/Ft.2over the design area or the ow in accordance with the criteria in
Table A must be used.
TABLE A
SERIES LFII RESIDENTIAL PENDENT, RECESSED PENDENT, AND CONCEALED PENDENT SPRINKLERS
NFPA 13, 13D AND 13R HYDRAULIC DESIGN CRITERIA
WET PIPE SYSTEMS

TFP408
Page 3 of 8
Maximum
Coverage
Area (a)
Ft. x Ft.
(m x m)
Maximum
Spacing
Ft. (m)
Minimum Flow(b) and Residual Pressure
For Horizontal Ceiling
(Max. 2 Inch Rise for 12 Inch Run)
Pendent and
Recessed Pendent
155°F/68°C or 175°F/79°C
12 x 12
(3,7 x 3,7)
12
(3,7)
20 GPM (75,7 LPM)
8.4 psi (0,58 bar)
14 x 14
(4,3 x 4,3)
14
(4,3)
20 GPM (75,7 LPM)
8.4 psi (0,58 bar)
16 x 16
(4,9 x 4,9)
16
(4,9)
20 GPM (75,7 LPM)
8.4 psi (0,58 bar)
18 x 18
(5,5 x 5,5)
18
(5,5)
20 GPM (75,7 LPM)
8.4 psi (0,58 bar)
20 x 20
(6,1 x 6,1)
20
(6,1)
23 GPM (87,1 LPM)
11.1 psi (0,76 bar)
(a) For coverage area dimensions less than or between those indicated, it is necessary to use the
minimum required ow for the next highest coverage area for which hydraulic design criteria
are stated.
(b) 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
Criteria Section for details.
TABLE B
SERIES LFII RESIDENTIAL PENDENT,
RECESSED PENDENT SPRINKLERS (TY4234)
WET PIPE HYDRAULIC DESIGN CRITERIA
FM APPROVED
Physical Characteristics:
Frame . . . . . . . . . . . . . . . . . . . . Brass
Button. . . . . . . . . . . . . . . . . . . Bronze
Sealing Assembly
. . . . . . . . . . . .Beryllium Nickel w/Tef-
lon†
Bulb . . . . . . . . . . . . . 3 mm dia. Glass
Compression Screw Bronze
Deector. . . . . . . . . . . . . . . . . Bronze
Ejection Spring Stainless Steel
Support Cup Steel
Cover Plate . . . . . . . . . . . . . . . . Brass
Retainer . . . . . . . . . . . . . . . . . . Brass
Cover Plate Ejection Spring
. . . . . . . . . . . . . . . . . . Stainless Steel
†DuPont Registered Trademark
Patents:
U.S.A. 7,201,234
Design
Criteria
UL AND C-UL LISTING CRITERIA
The Series LFII (TY4234) Residential
Pendent Sprinklers are UL and C-UL
Listed for installation in accordance
with the following criteria.
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 local Authority
having Jurisdiction.
System Type
Only wet pipe systems may be utilized.
Hydraulic Design
The minimum required sprinkler ow
rate for systems designed to NFPA
13D or NFPA 13R are given in Table
A as a function of temperature rat-
ing and the maximum allowable cov-
erage areas. The sprinkler ow rate is
the minimum required discharge 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:
• The ow rates given in Table A for
NFPA 13D and 13R as a function of
temperature rating and the maxi-
mum allowable coverage area.
• A minimum discharge of 0.1 gpm/
sq. ft. over the “design area” com-
prised of the four most hydraulically
demanding sprinklers for the actual
coverage areas being protected by
the four sprinklers.
Example No. 1: A corridor being pro-
tected is 8 ft. wide; consequently, an
actual coverage area of 8 ft. x 20 ft. is
being contemplated. Based on using
the LFII (TY4234) Residential Pendent
Sprinkler, the ow rate provided in
Table A for a 20 ft x 20 ft. coverage
area is 22 GPM. However based on
minimum discharge of 0.1 gpm/sq.
ft. the ow rate would be 16 GPM. In
this case a minimum ow rate of 22
GPM for this design sprinkler must be
utilized.
Example No. 2: A long narrow room
being protected is 12 ft. wide; con-
sequently, an actual coverage area of
12 ft. x 20 ft. is being contemplated.
Based on using the LFII (TY4234) Res-
idential Pendent Sprinkler, the ow
rate provided in Table A for a 20 ft x
20 ft. coverage area is 22 GPM. How-
ever based on minimum discharge of
0.1 gpm/sq. ft. the ow rate would be
24 GPM. In this case a minimum ow
rate of 24 GPM for this design sprin-
kler must be utilized.
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 TYCO technical data sheet
TFP490.
Operational Sensitivity
(Horizontal and Sloped Ceilings)
• For pendent sprinkler installations,
the sprinklers are to be installed
with a deflector to ceiling distance of
1-1/2 to 4 inches (38 to 100 mm).
Note: So as to help avoid obstruc-
tions to water distribution, a maxi-
mum 12 inch deflector-to-ceiling
distance is permitted for NFPA 13D
and NFPA 13R applications where
the sprinklers are located in closets.
• For recessed pendent sprinkler
installations, the sprinklers relative
to the ceiling mounting surface are
to be installed per Figure 2.

TFP408
Page 4 of 8
• For concealed pendent sprinkler
installations, the sprinklers relative
to the ceiling mounting surface are
to be installed per Figure 6.
Sprinkler Spacing
The minimum spacing between
sprinklers is 8 feet (2,4 m). The
maximum spacing between
sprinklers cannot exceed the length
of the coverage area (Ref. Table A)
being hydraulically calculated (e.g.,
maximum 12 feet for a 12 ft. x 12 ft.
coverage area, or 20 feet for a 20 ft. x
20 ft. coverage area).
NOTICE
The Series LFII must not be used in
applications where the air pressure
above the ceiling is greater than that
below. Down drafts through the Sup-
port Cup could delay sprinkler opera-
tion in a fire situation.
The following information pertaining
to System Type, Hydraulic Design, and
Sprinkler spacing are provided for ref-
erence and are not intended to pro-
vide complete installation criteria as
provide in the applicable Factory Mu-
tual Loss Prevention Data Sheet
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 ac-
ceptable to the local Authority having
Jurisdiction.
FM APPROVAL CRITERIA
The Series LFII (TY4234) Residen-
tial Pendent Sprinklers are FM Ap-
proved for installation in accordance
with the applicable Factory Mutual
Loss Prevention Data Sheet. Criteria
provided by FM may differ from UL
and/or NFPA, therefore the design-
er should review and become famil-
iar with Factory Mutiual requirements
before proceeding with design.
System Type
Only wet pipe systems may be utilized.
Hydraulic Design
The number of design sprinklers is
to be the four most hydraulically de-
manding sprinklers. The minimum re-
quired discharge from each of the four
sprinklers is to be the greater of the
following:
• The ow rates given in Table B as a
function of the maximum allowable
coverage area.
• A minimum discharge of 0.1 gpm/
sq. ft. over the “design area” com-
prised of the four most hydraulically
demanding sprinklers for the actual
coverage areas being protected by
the four sprinklers.
Example No. 1: A corridor being pro-
tected is 8 ft. wide; consequently, an
actual coverage area of 8 ft. x 20 ft.
is being contemplated. Based on us-
ing the LFII (TY4234) Residential Pen-
dent Sprinkler, the ow rate provided
in Table B for a 20 ft x 20 ft. cover-
age area is 23 GPM. However based
on minimum discharge of 0.1 gpm/sq.
ft. the ow rate would be 16 GPM. In
this case a minimum ow rate of 23
GPM for this design sprinkler must be
utilized.
Example No. 2: A long narrow room
being protected is 12 ft. wide; con-
sequently, an actual coverage area of
12 ft. x 20 ft. is being contemplated.
Based on using the LFII (TY4234) Res-
idential Pendent Sprinkler, the ow
rate provided in Table B for a 20 ft x
20 ft. coverage area is 23 GPM. How-
ever based on minimum discharge of
0.1 gpm/sq. ft. the ow rate would be
24 GPM. In this case a minimum ow
rate of 24 GPM for this design sprin-
kler must be utilized.
Sprinkler Spacing
The minimum spacing between sprin-
klers is 8 feet (2,4 m). The maximum
spacing between sprinklers cannot
exceed the length of the coverage
area (Ref. Table B) being hydraulically
calculated (e.g., maximum 12 feet for a
12 ft. x 12 ft. coverage area, or 20 feet
for a 20 ft. x 20 ft. coverage area).
NOTICE
The Series RFII must not be used in
applications where the air pressure
above the ceiling is greater than
that below. Down drafts through the
Support Cup could delay sprinkler
operation in a fire situation.
Operation
For pendent and recessed pendent
sprinklers, the glass bulb contains a
uid that expands when exposed to
heat. When the rated temperature is
reached, the uid expands sufciently
to shatter the glass bulb allowing the
sprinkler to activate and ow water.
For the concealed pendent sprinkler,
the cover plate which is soldered to
the support cup at three places, rst
falls away when exposed to heat from
a re. The sprinkler then operates sim-
ilar to pendent and recessed pendent
sprinklers described above.
FIGURE 1
SERIES LFII RESIDENTIAL PENDENT AND RECESSED PENDENT SPRINKLER (TY4234)
INSTALLATION DIMENSIONS
CROSS SECTION PENDENT RECESSED PENDENT
(38,1 mm)
1-1/2"
PLATE SEATING
ESCUTCHEON
Button2 -
Sealing Assembly
Bulb
Screw
Compression
Deflector
Deflector.
indicated on
rating is
Temperature
*
-
5
6-
3
4
-
-
*
*
6
5
4
2
3
1
Frame
Components:
1-
NOMINAL
MAKE-IN
1/2" (12,7 mm)
NPT
3/4"
STYLE 30
ESCUTCHEON
RECESSED
WRENCH
(57,2 mm)
2-1/4"
FLATS
SURFACE (73,0 mm)
2-7/8" DIA.
7
Ejection Spring
-
7

TFP408
Page 5 of 8
RECESS
WRENCH
WITH SPRINKLER
ENGAGEMENT
IN TO ENSURE
WRENCHING AREA
PUSH WRENCH
WRENCH RECESS
(END "B" USED
FOR TY4234)
FIGURE 3
W-T YPE 6
SPRINKLER WRENCH
FIGURE 4
W-TYPE 7 RECESSED
SPRINKLER WRENCH
FIGURE 2
SERIES LFII RESIDENTIAL PENDENT SPRINKLER
STYLE 30 RECESSED ESCUTCHEON (TY4234)
INSTALLATION DIMENSIONS
Installation
The TYCO Rapid Response Series
LFII (TY4234) must be installed
in accordance with the following
instructions.
NOTICE
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 bub-
ble should be present. The diameter
of the air bubble is approximately 1/16
inch (1,6 mm).
Obtain a 3/4 inch NPT sprinkler joint
by applying a minimum to maximum
torque of 10 to 20 ft.lbs. (13,4 to 26,8
Nm). Higher levels of torque may dis-
tort the sprinkler inlet with consequent
leakage or impairment of the sprinkler.
Do not attempt to compensate for in-
sufficient adjustment in an Escutch-
eon Plate by under or over-tightening
the Sprinkler. Readjust the position of
the sprinkler fitting to suit.
The Series LFII Pendent Sprinklers
must be installed in accordance with
the Steps 1P through 3P.
St ep 1P. Install pendent sprinklers in
the pendent position with the deflector
parallel to the ceiling.
St ep 2 P. With pipe-thread sealant
applied to the pipe threads, hand-
tighten the sprinkler into the sprinkler
fitting.
NOTICE
The sprinkler has been provided with
a Sprinkler Strap similar that shown in
Figure 5 for the concealed sprinkler
assembly. Do not remove the Sprin-
kler Strap until the sprinkler system is
to be placed in service. As long as the
Sprinkler Strap remains in place, the
system is considered to be “Out Of
Service”.
St ep 3 P. Tighten the sprinkler into the
sprinkler tting using only the W-Type
6 Sprinkler Wrench (Figure 3). With ref-
erence to Figure 1, apply the W-Type 6
Sprinkler Wrench to the wrench ats.
Note: Refer to Technical Data Sheet
TFP700 regarding instructions for the
removal of the Sprinkler Strap.
The Series LFII Recessed Pendent
Sprinklers must be installed in accor-
dance with Steps 1R through 4R.
Step 1R. Install recessed pendent
sprinklers in the pendent position with
the deector parallel to the ceiling.
Step 2R. After installing the Style
30 Mounting Plate over the sprinkler
threads and with pipe-thread seal-
ant applied to the pipe threads, hand-
tighten the sprinkler into the sprinkler
tting.
NOTICE
The sprinkler has been provided with
a Sprinkler Strap similar that shown in
Figure 5 for the concealed sprinkler
assembly. Do not remove the Sprin-
kler Strap until the sprinkler system is
ready for service. As long as the Sprin-
kler Strap remains in place, the system
is considered to be “Out Of Service”.
Step 3R. Tighten the sprinkler into the
sprinkler tting using only the W-Type
7 Recessed Sprinkler Wrench (Fig-
ure 4). With reference to Figure 1, ap-
ply the W-Type 7 Recessed Sprinkler
Wrench to the sprinkler wrench ats.
Step 4R. After the ceiling has been
installed or the nish coat has been
applied, slide on the Style 30 Clo-
sure over the Series LFII Sprinkler and
push the Closure over the Mounting
Plate until its ange comes in contact
with the ceiling.
Note: Refer to Technical Data Sheet
TFP700 regarding instructions for the
removal of the Sprinkler Strap.
The Series LFII Concealed Pendent
Sprinklers must be installed in accor-
dance with Steps 1C through 6C.
Step 1C. Install the sprinkler in the
pendent position and with the center-
line of the sprinkler perpendicular to
the mounting surface.
2-1/4" DIA.
(57,2 mm)
(73,0 mm)
2-7/8" DIA.
TY4234
SPRINKLER
MOUNTING
CLOSURE
SURFACE
FACE OF
FITTING
(12,7±3,2 mm)
1/2±1/8"
(3,2 mm)
1" (25,4 mm)
1-1/4" (31,8 mm)
PLATE
MOUNTING
1/8"
1/4" (6,4 mm)
1/2" (12,7 mm)

TFP408
Page 6 of 8
SPRINKLER/SUPPORT CUP
ASSEMBLY
COVER PLATE/RETAINER
ASSEMBLY
SUPPORT CUP
SOLDER
TABS (3)
CEILING
SURFACE IS
FLUSH WITH
UNTIL MOUNTING
THREAD INTO
SPRINKLER
SECTION)
STRAP (SEE
INSTALLATION
DISPOSABLE
WITH THREAD
PLATE
COVER
SPRING
EJECTION
TABS
RETAINER
CUP WITH
SUPPORT
THREADS
ROLL FORMED
SPRINKLERTHREADED
3/4"
3-5/16" DIA.
(84,1 mm)
ASSEMBLY
SPRINKLER-
SUPPORT CUPRETAINER
ASSEMBLY
COVER-
NPT
(25,4 mm)
1"
MOUNTING
SURFACE
ADJUSTMENT
3/32" GAP
(2,4 mm)
1-1/8"±1/4"
±6,4 mm)
(28,6 mm
FITTING
(63,5 mm)
2-1/2" DIA.
1/2" (12,7 mm) FACE OF ASSEMBLY
DISPOSABLE
PROTECTIVE CAPTIP
7/8" (22,2 mm)
3/8" (9,5 mm)
COVER
PLATE
RETAINER
OPERATED
SPRINKLER
SPRINKLER-
SUPPORT CUP
FIGURE 6
SERIES LFII RESIDENTIAL CONCEALED PENDENT SPRINKLER (TY4234)
INSTALLATION DIMENSIONS / DISPOSABLE PROTECTIVE CAP
FIGURE 5
SERIES LFII RESIDENTIAL CONCEALED PENDENT SPRINKLER (TY4234)
(Shown with Disposable Sprinkler Strap)

TFP408
Page 7 of 8
Step 2C. Remove the Protective Cap.
NOTICE
Do not remove the Sprinkler Strap
(Fig. 5) until the sprinkler system is to
be placed in service.
Step 3C. With pipe thread sealant ap-
plied to the pipe threads, and using
the W-Type 7 Wrench shown in Fig-
ure 4, install and tighten the Sprin-
kler/Support Cup Assembly into
the tting. The W-Type 7 Wrench
will accept a 1/2 inch ratchet drive.
Step 4C. Replace the Protective Cap
by pushing it upwards until it bottoms
out against the Support Cup. The Pro-
tective Cap helps prevent damage to
the Deector and Arms during ceiling
installation and/or during application
of the nish coating of the ceiling. It
may also be used to locate the center
of the clearance hole by gently push-
ing the ceiling material against the
center point of the Cap.
NOTICE
As long as the Sprinkler Strap (Fig. 5)
or the Protective Cap (Fig. 6) remains
in place, the system is considered to
be “Out Of Service”.
Step 5C. After the ceiling has been
completed with the 2-1/2 inch (63 mm)
diameter clearance hole and in prep-
aration for installing the Cover Plate/
Retainer Assembly, remove and dis-
card the Protective Cap and the Sprin-
kler Strap.
Note: Refer to Technical Data Sheet
TFP700 regarding instructions for the
removal of the Sprinkler Strap.
Step 6C. Push the Cover Plate/Re-
tainer Assembly into the Support Cup,
and as necessary, make the nal ad-
justment of the Cover Plate with re-
spect to the ceiling by turning the
Cover Plate/Retainer Assembly clock-
wise until its ange just comes in con-
tact with the ceiling.
If it becomes necessary to remove
the Cover Plate, it can be removed
by unscrewing in a counter-clockwise
direction.
If the Cover Plate/Retainer Assembly
cannot be engaged with the Support
Cup or the Cover Plate/Retainer As-
sembly cannot be engaged sufcient-
ly to contact the ceiling, the Sprinkler
Fitting must be repositioned.
Care and
Maintenance
The TYCO Rapid Response Series
LFII (TY4234) must be maintained and
serviced in accordance with the fol-
lowing instructions:
NOTICE
Before closing a fire protection system
main control valve for maintenance
work on the fire protection system that
it controls, obtain permission to shut
down the affected fire protection sys-
tem from the proper authorities and
notify all personnel who may be affect-
ed by this action.
When properly installed, there is a
nominal 3/32 inch (2,4 mm) air gap be-
tween the lip of the Cover Plate and
the ceiling, as shown in Figure 6. This
air gap is necessary for proper oper-
ation 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 sprin-
kler operation.
Absence of a Cover Plate can de-
lay the sprinkler operation in a re
situation.
Do not pull the Cover Plate relative to
the Retainer. Separation may result.
Exercise care to avoid damage to
sprinklers before, during, and after in-
stallation. Never paint, plate, coat, or
otherwise alter automatic sprinklers
after they leave the factory.
Never repaint factory-painted Cover
Plates. When necessary, replace cov-
er plates with factory-painted units.
Non-factory applied paint can ad-
versely delay or prevent sprinkler op-
eration in the event of a re and is not
permitted by NFPA.
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.
Owners are Responsibile for the in-
spection, testing, and maintenance
of their re protection system and de-
vices in compliance with this docu-
ment, as well as with the applicable
standards of the National Fire Protec-
tion Association (for example, NFPA
25), in addition to the standards of any
other authorities having jurisdiction.
Contact the installing 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
.

TFP408
Page 8 of 8
Copyright © 2011 Tyco Fire Suppression & Building Products. All rights reserved.
Limited
Warranty
Products manufactured by Tyco
Fire Suppression & Building Prod-
ucts (TFSBP) are warranted solely to
the original Buyer for ten (10) years
against defects in material and work-
manship when paid for and properly
installed and maintained under nor-
mal use and service. This warran-
ty will expire ten (10) years from date
of shipment by TFSBP. No warranty
is given for products or components
manufactured by companies not afli-
ated by ownership with TFSBP or for
products and components which have
been subject to misuse, improper in-
stallation, corrosion, or which have
not been installed, maintained, modi-
ed or repaired in accordance with
applicable Standards of the Nation-
al Fire Protection Association, and/or
the standards of any other Authorities
Having Jurisdiction. Materials found
by TFSBP to be defective shall be ei-
ther repaired or replaced, at TFSBP’s
sole option. TFSBP neither assumes,
nor authorizes any person to assume
for it, any other obligation in connec-
tion with the sale of products or parts
of products. TFSBP shall not be re-
sponsible for sprinkler system design
errors or inaccurate or incomplete in-
formation supplied by Buyer or Buy-
er’s representatives.
In no event shall TFSBP be liable, in
contract, tort, strict liability or under
any other legal theory, for inciden-
tal, indirect, special or consequential
damages, including but not limited to
labor charges, regardless of whether
TFSBP was informed about the pos-
sibility 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, ex-
press or implied, including warranties
of merchantability and tness for a
particular purpose.
This limited warranty sets forth the ex-
clusive remedy for claims based on
failure of or defect in products, materi-
als or components, whether the claim
is made in contract, tort, strict liability
or any other legal theory.
This warranty will apply to the full ex-
tent permitted by law. The invalidity,
in whole or part, of any portion of this
warranty will not affect the remainder.
.
Ordering
Procedure
When placing an order, indicate the
full product name. Contact your local
distributor for availability.
• For pendent sprinkler, order pendent
sprinkler assembly plus sprinkler
wrench.
• For recessed pendent sprinkler, or-
der pendent sprinkler assembly plus
separately ordered recessed es-
cutcheon plus sprinkler wrench.
• For concealed pendent sprinkler,
order concealed pendent sprinkler
assembly plus separately ordered
cover plate assembly plus sprinkler
wrench.
Pendent Sprinkler Assembly
Series LFII (TY4234), K=6.9, Residen-
tial Pendent Sprinkler with (specify)
temperature rating and (specify) nish,
P/N (specify).
155°F/68°C
Chrome Plated . . . . . . . . . . . . . . P/N 51-069-9-155
155°F/68°C
Signal White (a)
(RAL9003) . . . . . . . . . . . . . . . . P/N 51-069-4-155
155°F/68°C
Pure White (b)
(RAL9010) . . . . . . . . . . . . . . . . P/N 51-069-3-155
155°F/68°C
Natural Brass . . . . . . . . . . . . . . . P/N 51-069-1-155
175°F/79°C or
Chrome Plated . . . . . . . . . . . . . . P/N 51-069-9-175
175°F/79°C
Signal White (a)
(RAL9003) . . . . . . . . . . . . . . . . P/N 51-069-4-175
175°F/79°C
Pure White (b)
(RAL9010)* . . . . . . . . . . . . . . . . P/N 51-069-3-175
175°F/79°C
Natural Brass . . . . . . . . . . . . . . . P/N 51-0 69-1-175
(a) Previously known as Bright White.
(b) Eastern Hemisphere sales only.
Separately Ordered Recessed
Escutcheon:
Specify: Style 30 Recessed Es-
cutcheon with (specify*) nish, P/N
(specify*).
*Refer to Technical Data Sheet TFP770.
Concealed Pendent Sprinkler
Assembly:
Series LFII (TY4234), K=6.9, Resi-
dential Concealed Pendent Sprinkler
with (specify) temperature rating and
without Cover Plate Assembly, P/N
(specify).
155°F/68°C ................P/N 51- 068-1-155
175°F/79°C ................P/N 51- 068-1-175
Separately Ordered Cover Plate
Assembly:
139°F/58°C, Cover Plate Assembly
having a (specify) nish for the Series
LFII (TY4234), K=6.9, Residential
Concealed Pendent Sprinkler, P/N
(specify).
Chrome ....................P/N 56-873-9-135
Signal White (a)
(RAL 9003) ................P/N 56-873-4-135
Pure White (b)
(RAL 9010) ................P/N 56-873-3-135
Custom ...................P/N 56-873-X-135
(a) Previously known as Bright White.
(b) Eastern Hemisphere sales only.
Separately Ordered Sprinkler
Wrench:
Specify: W-Type 6 Sprinkler Wrench,
P/N 56-000-6-387. (For pendent
sprinklers.)
Specify: W-Type 7 Sprinkler Wrench,
P/N 56-850-4-001. (For recessed pen-
dent sprinklers and concealed pen-
dent sprinklers.)