Tyco LFII Series User manual

Series LFII Residential, NFPA 13 Optimized
Pendent, Recessed, and Concealed Sprinklers
6.9 K-factor, 3/4” NPT
Technical Services: Tel: [phone] / Fax: [phone]
Page 1 of 8 MAY, 2008 TFP408
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 (TY4234) Residential Pendent, Re-
cessed Pendent, and Concealed Pen-
dent Sprinklers are decorative, fast
response, frangible bulb sprinklers de-
signed for use in residential occupan-
cies such as homes, apartments, dor-
mitories, and hotels. When enhanced
flow characteristics for residential por-
tions of any occupancy per NFPA 13 is
the major consideration, the Series LFII
(TY4234) should be the first choice.
When higher flow demands are re-
quired for residential sprinklers used
in an NFPA 13 design, the large 6.9 K-
factor of the Series LFII (TY4234) is an
attractive choice. Although primarily
intended where residential sprinklers
are to be used in an NFPA 13 design,
the Series LFII (TY4234) 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 Series LFII
(TY4234) is intended for use in areas
with finished ceilings. It employs a two-
piece Style 30 Recessed Escutcheon.
The Recessed Escutcheon provides
1/4 inch (6,4 mm) of recessed adjust-
ment or up to 1/2 inch (12,7 mm) of to-
tal adjustment from the flush mount-
ing surface position. The adjustment
provided by the Recessed Escutcheon
or Concealed Cover Plate provides
a measure of flexibility with regard to
which the length of fixed 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 fire protection system prior to the
installation of the ceiling or application
of a finish 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 (TY4234) Residential
Concealed Pendent Sprinklers 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
finished. 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 (TY4234) has been de-
signed with heat sensitivity and water
distribution characteristics proven to
help in the control of residential fires
and to improve the chance for occu-
pants to escape or be evacuated.
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

Page 2 of 8 TFP408
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.
The owner is responsible for maintain-
ing their fire protection system and de-
vices in proper operating condition.
The installing contractor or sprinkler
manufacturer should be contacted
with any questions.
Sprinkler/Model
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 Con-
cealed 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 approved
with the Series LFII Concealed Cover
Plates having a factory applied finish.
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.
Physical Characteristics:
Frame.................... Brass
Button................... Bronze
Sealing Assembly. . . . . . . . . . . . . . . .
. . . . . . . . . Beryllium Nickel w/Teflon†
Bulb . . . . . . . . . . . . . 3 mm dia. Glass
Compression Screw. . . . . . . . Bronze
Deflector. . . . . . . . . . . . . . . . . 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
(a) For coverage area dimensions less than or between those indicated, it is necessary to use the minimum required flow for the next
highest coverage area for which hydraulic design criteria are stated.
(b) Requirement is based on minimum flow 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 A
UL AND C-UL LISTED
NFPA 13D AND NFPA 13R WET PIPE HYDRAULIC DESIGN CRITERIA
FOR THE SERIES LFII (TY4234) RESIDENTIAL PENDENT, RECESSED PENDENT,
AND CONCEALED PENDENT SPRINKLERS
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)
Minimum Flow(b) and Residual Pressure
For Sloped Ceiling
(Greater Than 2 Inch Rise for 12 Inch Run2 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)

TFP408 Page 3 of 8
(a) For coverage area dimensions less than or between those indicated,
it is necessary to use the minimum required flow for the next highest
coverage area for which hydraulic design criteria are stated.
(b) Requirement is based on minimum flow 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
FM APPROVED
WET PIPE HYDRAULIC DESIGN CRITERIA
FOR THE SERIES LFII (TY4234)
RESIDENTIAL PENDENT, RECESSED PENDENT SPRINKLERS
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)
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 re-
quired sprinkler flow rate for systems
designed to NFPA 13D or NFPA 13R
are given in Table A as a function of
temperature rating and the maximum
allowable coverage areas. The sprin-
kler flow rate is the minimum required
discharge from each of the total num-
ber of “design sprinklers” as specified
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 flow rates given in Table A for
NFPA 13D and 13R as a function of
temperature rating and 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 using
the LFII (TY4234) Residential Pendent
Sprinkler, the flow 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 flow rate would be 16 GPM. In
this case a minimum flow 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 contemplat-
ed. Based on using the LFII (TY4234)
Residential Pendent Sprinkler, the flow
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 flow rate would be
24 GPM. In this case a minimum flow
rate of 24 GPM for this design sprinkler
must be utilized.
Obstruction To Water Distribution.
Locations of sprinklers are to be in
accordance with the obstruction rules
of NFPA 13 for residential sprinklers.
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 dis-
tance 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.
• 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).
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 Support Cup could delay sprin-
kler operation in a fire situation.
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 requirementsFactory Mutiual requirements
before proceeding with design.

Page 4 of 8 TFP408
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.
Note: The following information per-
taining to System Type, Hydraulic De-
sign, and Sprinkler spacing are provid-
ed for reference and are not intended
to provide complete installation crite-
ria as provide in the applicable Factory
Mutual Loss Prevention Data Sheet
System Type. Only wet pipe systems
may be utilized.
Hydraulic Design. The number of de-
sign sprinklers is to be the four most
hydraulically demanding sprinklers.
The minimum required discharge from
each of the four sprinklers is to be the
greater of the following:
• The flow 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 using
the LFII (TY4234) Residential Pendent
Sprinkler, the flow rate provided in Ta-
ble B for a 20 ft x 20 ft. coverage area is
23 GPM. However based on minimum
discharge of 0.1 gpm/sq. ft. the flow
rate would be 16 GPM. In this case a
minimum flow 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 contemplat-
ed. Based on using the LFII (TY4234)
Residential Pendent Sprinkler, the flow
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 flow rate would be
24 GPM. In this case a minimum flow
rate of 24 GPM for this design sprinkler
must be utilized.
Sprinkler Spacing. The minimum
spacing between sprinklers is 8 feet
(2,4 m). The maximum spacing be-
tween 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).
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
fluid that 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 flow water.
For the concealed pendent sprinkler,
the cover plate which is soldered to
the support cup at three places, first
falls away when exposed to heat from
a fire. The sprinkler then operates sim-
ilar to pendent and recessed pendent
sprinklers described above.
FIGURE 1
SERIES LFII (TY4234) RESIDENTIAL
PENDENT AND RECESSED PENDENT SPRINKLER
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-TYPE 6
SPRINKLER WRENCH
FIGURE 4
W-TYPE 7 RECESSED
SPRINKLER WRENCH
FIGURE 2
STYLE 30 RECESSED ESCUTCHEON
FOR USE WITH THE SERIES LFII (TY4234)
RESIDENTIAL PENDENT SPRINKLER
Installation
The TycoTyco®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).
A 3/4 inch NPT sprinkler joint should
be obtained with a minimum to maxi-
mum torque of 10 to 20 ft.lbs. (13,4 to
26,8 Nm). Higher levels of torque may
distort the sprinkler inlet with conse-
quent leakage or impairment of the
sprinkler.
Do not attempt to compensate for in-
sufficient adjustment in an Escutcheon
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.
Step 1P. Pendent sprinklers are to be
installed in the pendent position with
the deflector parallel to the ceiling.
Step 2P. 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 Sprinkler
Strap until the sprinkler system is to be
placed in service. As long as the Sprin-
kler Strap remains in place, the system
is considered to be “Out Of Service”.
Step 3P. Tighten the sprinkler into the
sprinkler fitting using only the W-Type
6 Sprinkler Wrench (Ref. Figure 3).
With reference to Figure 1, the W-Type
6 Sprinkler Wrench is to be applied to
the wrench flats.
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. Recessed pendent sprinklers
are to be installed in the pendent posi-
tion with the deflector 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
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 Sprinkler
Strap until the sprinkler system is to be
placed in 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 fitting using only the W-Type
7 Recessed Sprinkler Wrench (Ref.
Figure 4). With reference to Figure
1, the W-Type 7 Recessed Sprinkler
Wrench is to be applied to the sprin-
kler wrench flats.
Step 4R. After the ceiling has been in-
stalled or the finish coat has been ap-
plied, slide on the Style 30 Closure
over the Series LFII Sprinkler and push
the Closure over the Mounting Plate
until its flange 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. The sprinkler must only be
installed in the pendent position and
with the centerline of the sprinkler per-
pendicular to the mounting surface.
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.
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)

Page 6 of 8 TFP408
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 CUP
RETAINER
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 CAP
TIP
7/8" (22,2 mm)
3/8" (9,5 mm)
COVER
PLATE
RETAINER
OPERATED
SPRINKLER
SPRINKLER-
SUPPORT CUP
FIGURE 6
SERIES LFII (TY2234) RESIDENTIAL CONCEALED PENDENT SPRINKLER
INSTALLATION DIMENSIONS / DISPOSABLE PROTECTIVE CAP
FIGURE 5
SERIES LFII (TY2234) RESIDENTIAL
CONCEALED PENDENT SPRINKLER
(Shown with Disposable Sprinkler Strap)

TFP408 Page 7 of 8
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 fitting. 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 Deflector and Arms 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 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 prepa-
ration for installing the Cover Plate/Re-
tainer Assembly, remove and discard
the Protective Cap and the Sprinkler
Strap.
Note: Refer to Technical Data Sheet
TFP700 regarding instructions for the
removal of the Sprinkler Strap.
Step 6C. Push the Cover Plate/Retain-
er Assembly into the Support Cup, and
as necessary, make the final adjust-
ment of the Cover Plate with respect to
the ceiling by turning the Cover Plate/
Retainer Assembly clockwise until its
flange just comes in contact 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 sufficiently
to contact the ceiling, the Sprinkler Fit-
ting 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
Absence of an Escutcheon Plate may
delay the sprinkler operation in a fire
situation.
When properly installed, there is a
nominal 3/32 inch (2,4 mm) air gap
between the lip of the Cover Plate and
the ceiling, as shown in Figure 6. This
air gap is necessary for proper opera-
tion 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 re-
placed, if necessary, by factory paint-
ed units. Non-factory applied paint
may adversely delay or prevent sprin-
kler operation in the event of a fire.
Do not pull the Cover Plate relative to
the Enclosure. Separation may result.
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 sys-
tem must be obtained from the prop-
er authorities and all personnel who
may be affected by this action must be
notified.
Sprinklers which are found to be leak-
ing or exhibiting visible signs of corro-
sion 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 dam-
age to the sprinklers -before, during,
and after installation. Sprinklers dam-
aged by dropping, striking, wrench
twist/slippage, or the like, must be re-
placed. Also, replace any sprinkler that
has a cracked bulb or that has lost
liquid from its bulb. (Ref. Installation
Section).
The owner is responsible for the in-
spection, testing, and maintenance of
their fire protection system and devic-
es in compliance with this document,
as well as with the applicable stan-
dards of the National Fire Protection
Association (e.g., NFPA 25), in addition
to the standards of any other authori-
ties having jurisdiction. The installing
contractor or sprinkler manufacturer
should be contacted relative to any
questions.
NOTICE
The owner must assure that the sprin-
klers are not used for hanging of 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.

Page 8 of 8 TFP408
© 2008 TYCO FIRE & BUILDING PRODUCTS , 451 North Cannon Avenue, Lansdale, Pennsylvania 19446
Limited
Warranty
Products manufactured by Tyco Fire
& Building Products (TFBP) are war-
ranted solely to the original Buyer for
ten (10) years against defects in mate-
rial 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 TFBP. No warran-
ty is given for products or components
manufactured by companies not af-
filiated by ownership with TFBP or for
products and components which have
been subject to misuse, improper in-
stallation, corrosion, or which have not
been installed, maintained, modified or
repaired in accordance with applicable
Standards of the National Fire Protec-
tion Association, and/or the standards
of any other Authorities Having Juris-
diction. Materials found by TFBP to be
defective shall be either repaired or re-
placed, at TFBP’s sole option. TFBP
neither assumes, nor authorizes any
person to assume for it, any other ob-
ligation in connection with the sale of
products or parts of products. TFBP
shall not be responsible for sprinkler
system design errors or inaccurate or
incomplete information supplied by
Buyer or Buyer’s representatives.
In no event shall TFBP be liable, in
contract, tort, strict liability or under
any other legal theory, for incidental,
indirect, special or consequential dam-
ages, including but not limited to labor
charges, regardless of whether TFBP
was informed about the possibility of
such damages, and in no event shall
TFBP’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 fitness 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 dis-
tributor 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) finish,
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 51-069-1-175
(a) Previously known as Bright White.
(b) Eastern Hemisphere sales only.
Separately Ordered Recessed
Escutcheon:
Specify: Style 30 Recessed Es-
cutcheon with (specify*) finish, 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) finish 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.)