Tyco LFII Series User manual

RAPID RESPONSE Series LFII Residential Sprinklers
5.8 K-factor Pendent and Recessed Pendent
Wet Pipe Systems
Page 1 of 4 MAY 2015 TFP401
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Contacts
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
installation 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 and Recessed
Pendent Sprinklers (TY3934) are dec-
orative, fast response, frangible bulb
sprinklers designed for use in residen-
tial occupancies such as homes, apart-
ments, dormitories, and hotels. When
aesthetics and optimized flow charac-
teristics are the major consideration,
the Series LFII Residential Sprinklers
(TY3934) should be the first choice.
The Series LFII Residential 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 recessed version of the Series
LFII Residential Sprinklers is intended
for use in areas with finished ceil-
ings. It employs a two-piece Style 20
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 adjustment
from the flush ceiling position. The
adjustment provided by the Recessed
Escutcheon reduces the accuracy to
which the pipe drops to the sprinklers
must be cut.
The Series LFII Residential Sprinklers
have been designed with heat sensi-
tivity and water distribution charac-
teristics proven to help in the control
of residential fires and to improve the
chance for occupants to escape or be
evacuated.
NOTICE
The Series LFII Residential Pendent and
Recessed Pendent Sprinklers (TY3934)
described herein must be installed and
maintained in compliance with this doc-
ument and the applicable standards of
the National Fire Protection Associa-
tion, in addition to the standards of any
authorities having jurisdiction. Failure to
do so may impair the performance of
these devices.
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)
TY3934
Technical
Data
Approvals
UL and C-UL Listed
Certified to all requirements of
NSF/ANSI 61
Discharge Coefficient
K = 5.8 gpm/psi1/2 (83,5 lpm/bar1/2)
Temperature Rating
155°F (68°C) or 175°F (79°C)
Finishes
Natural Brass
Pure or Signal White
Jet Black
Chrome Plated
Physical Characteristics
Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Brass
Button . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bronze
Sealing Assembly ..Beryllium Nickel w/TEFLON
Bulb (3 mm) . . . . . . . . . . . . . . . . . . . . . . . . Glass
Compression Screw . . . . . . . . . . . . . . . . . .Brass
Deflector . . . . . . . . . . . . . . . . . . . . . . . . . . .Brass

TFP401
Page 2 of 4
Operation
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.
Design
Criteria
The TYCO RAPID RESPONSE Series
LFII Residential Pendent and Recessed
Pendent Sprinklers (TY3934) are to
be installed in accordance with this
section.
Residential Sprinkler Design Guide
When conditions exist that are outside
the scope of the provided criteria, refer
to the Residential Sprinkler Design
Guide TFP490 for the manufactur-
er’s recommendations that may be
acceptable to the local authority having
jurisdiction.
Ceiling Types
Smooth flat horizontal, or beamed, or
sloped, in accordance with the 2013
Edition of 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.
The number of “design sprinklers”
specified in NFPA 13D and 13R for wet
pipe systems is to be applied when
designing dry pipe systems.
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 ow rates given in Table A as a
function of temperature rating and
the maximum allowable coverage
area.
• A minimum discharge of 0.1 gpm/ft
2
over the “design area” comprised
of the four most hydraulically
demanding 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
Sprinklers are to be installed with a
deflector-to-ceiling distance of 1 to 4
inches below smooth ceilings.
For "Beamed Ceiling" conditions as
allowed by NFPA, the maximum deflec-
tor distance below the bottom of a
beam is 1-3/4 inches. See NFPA Stan-
dards for allowed beam configurations.
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
(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).
Installation
The TYCO RAPID RESPONSE Series
LFII Residential Pendent and Recessed
Pendent Sprinklers (TY3934) 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. The diameter of the
air bubble is approximately 1/16 inch
(1,6 mm).
A leak-tight 1/2 inch NPT sprinkler joint
should be obtained by applying a min-
imum-to-maximum torque of 7 to 14
ft.-lbs. (9,5 to 19,0 Nm). Higher levels
of torque can distort the sprinkler Inlet
with consequent leakage or impairment
of the sprinkler.
Do not attempt to compensate for
insufficient adjustment in an Escutch-
eon Plate by under- or over- tightening
the sprinkler. Re-adjust the position of
the sprinkler fitting to suit.
Series LFII Residential Pendent
Sprinkler Installation
The Series LFII Residential Pendent
Sprinklers must be installed in accor-
dance with the following instructions.
Step 1. Install pendent sprinklers in the
pendent position with the deector par-
allel to the ceiling.
Step 2. With pipe thread sealant
applied to the pipe threads, hand-
tighten the sprinkler into the sprinkler
tting.
Step 3. 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.
*
*
*
*
CROSS SECTION PENDENT RECESSED PENDENT
1-3/8"
(34,9 mm)
2"
(50,8 mm)
WRENCH
FLATS
STYLE 20
RECESSED
ESCUTCHEON
7/16" (11,1 mm)
NOMINAL MAKE-IN
ESCUTCHEON PLATE
SEATING SURFACE
1/2"
NPT
DEFLECTOR
Components:
2-7/8" (73,0 mm) DIA.
4
3
1
2
5
6
-Compression
Screw
5
Deector
-
6
Temperature
rating is indicated
on Deector
-
1
Frame
Button
Sealing
Assembly
-
-
Bulb
-
3
2
4
FIGURE 1
RAPID RESPONSE SERIES LFII RESIDENTIAL
PENDENT AND RECESSED PENDENT SPRINKLERS (TY3934)

TFP401
Page 3 of 4
Series LFII Residential Recessed
Pendent Sprinkler Installation
The Series LFII Residential Recessed
Pendent Sprinklers must be installed
in accordance with the following
instructions.
Step A. Install recessed pendent sprin-
klers in the pendent position with the
deector parallel to the ceiling.
Step B. After installing the Style 20
Mounting Plate over the sprinkler
threads and with pipe thread sealant
applied to the pipe threads, hand-
tighten the sprinkler into the sprinkler
tting.
Step C. Tighten the sprinkler into the
sprinkler tting using only the W-Type 7
Recessed Sprinkler Wrench (Figure 4).
With reference to Figure 1, apply the
W-Type 7 Recessed Sprinkler Wrench
to the sprinkler wrench ats.
Step D. After the ceiling has been
installed or the nish coat has been
applied, slide on the Style 20 Closure
over the Series LFII Residential Sprin-
kler and push the Closure over the
Mounting Plate until its ange comes in
contact with the ceiling.
Max.
Coverage
Area (a)
Ft. x Ft.
(m x m)
WET PIPE SYSTEM
Minimum Flow and Residual Pressure(b, c)
Ordinary Temp. Rating
155°F (68°C) Intermediate Temp. Rating
175°F (79°C) Deflector to
Ceiling Installation Type
Minimum
Spacing
Ft.
(m)
Flow
gpm
(lpm)
Pressure
psi
(bar)
Flow
gpm
(lpm)
Pressure
psi
(bar)
12 x 12
(3,7 x 3,7)
16
(60,6)
7.6
(0,52)
16
(60,6)
7.6
(0,52)
Smooth
Ceilings
1 to
4 inches
Beamed
Ceilings per
NFPA 13D
or 13R
1 to 1-3/4
inches below
bottom of
beam.
Recessed
using Style 20
Escutcheon or
non-recessed
per NFPA 13D,
13R, or 13
8
(2,4)
14 x 14
(4,3 x 4,3)
16
(60,6)
7.6
(0,52)
16
(60,6)
7.6
(0,52)
16 x 16
(4,9 x 4,9)
16
(60,6)
7.6
(0,52)
16
(60,6)
7.6
(0,52)
18 x 18
(5,5 x 5,5)
18
(6 8,1)
9.6
(0,66)
18
(6 8,1)
9.6
(0,66)
20 x 20
(6 ,1 x 6,1)
20
(75,7)
11.9
(0,82)
20
(75,7)
11.9
(0,82)
(a) For coverage area dimensions less than or between those indicated, use the minimum required ow for the next highest coverage
area for which hydraulic design 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 under the Design Criteria section.
(c) For NFPA 13 residential applications, the greater of 0.1 gpm/ft2over the design area or the ow in accordance with the criteria in
this table must be used.
MOUNTING
SURFACE
MOUNTING
PLATE
2-7/8" DIA.
(73,0 mm)
2-1/4" DIA.
(57,2 mm)
FACE OF
SPRINKLER
FITTING
1/8"
(3,2 mm)
5/16±1/4"
(7,9±6,4 mm)
TY3934
CLOSURE
1-3/8" (34,9 mm)
7/8" (22,2 mm)
1/2" (12,7 mm)
FLUSH
WRENCH RECESS
(USE ONLY
END "A")
WRENCH
RECESS
PUSH WRENCH
IN TO ENSURE
ENGAGEMENT
WITH SPRINKLER
WRENCHING AREA
FIGURE 3
W-TYPE 6
SPRINKLER WRENCH
FIGURE 4
W-TYPE 7 RECESSED
SPRINKLER WRENCH
FIGURE 2
STYLE 20 RECESSED ESCUTCHEON FOR USE WITH THE
RAPID RESPONSE SERIES LFII RESIDENTIAL PENDENT SPRINKLER
(TY3934)
TABLE A
WET PIPE SYSTEM
SERIES LFII RESIDENTIAL PENDENT AND RECESSED PENDENT SPRINKLERS (TY3934)
NFPA 13D, 13R, AND 13 HYDRAULIC DESIGN CRITERIA

GLOBAL HEADQUARTERS | 1400 Pennbrook Parkway, Lansdale, PA 19446 | Telephone [phone]
TFP401
Page 4 of 4
Copyright © 2015 Tyco Fire Products, LP. All rights reserved.
TEFLON is trademark of The DuPont Corporation.
Care and
Maintenance
The TYCO RAPID RESPONSE Series
LFII Residential Pendent and Recessed
Pendent Sprinklers (TY3934) 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 that
it controls, permission to shut down the
affected fire protection system must be
obtained from the proper authorities
and notify all personnel who may be
affected by this action.
Absence of the outer piece of an
escutcheon, which is used to cover
a clearance hole, can delay sprinkler
operation in a fire situation.
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.
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 other-
wise altered after leaving the factory.
Modified sprinklers must be replaced.
Sprinklers that have been exposed to
corrosive products of combustion, but
have not operated, should be replaced
if they cannot be completely cleaned
by wiping the sprinkler with a cloth or
by brushing it with a soft bristle brush.
Care must be exercised to avoid
damage to the sprinklers - before,
during, and after installation. Sprin-
klers damaged by dropping, striking,
wrench twist/slippage, or the like, must
be replaced. Also, replace any sprin-
kler that has a cracked bulb or that has
lost liquid from its bulb. (Ref. Installa-
tion Section.)
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
(e.g., NFPA 25), in addition to the stan-
dards of any authorities having jurisdic-
tion. Contact the installing contractor
or product manufacturer regarding any
questions.
Automatic sprinkler systems are rec-
ommended to be inspected, tested,
and maintained by a qualified Inspec-
tion Service in accordance 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
availability. When placing an order,
indicate the full product name and Part
Number (P/N).
Sprinkler Assembly
Specify: Series LFII (TY3934), K = 5.8,
Residential Pendent Sprinkler, (specify)
temperature rating, (specify) finish, P/N
(specify):
155°F (68°C)
Natural Brass .................51-058-1-155
Pure White (RAL 9010)* . . . . . . . . . 51-058-3-155
Signal White (RAL 9003) . . . . . . . . 51-058-4-155
Jet Black (RAL 9005) ...........51-058-5-155
Chrome Plated ................51-058-9-155
175°F (79°C)
Natural Brass .................51-058 -1-175
Pure White (RAL 9010)* . . . . . . . . . 51-058-3-175
Signal White (RAL 9003) . . . . . . . . 51-058 -4-175
Jet Black (RAL 9005) ...........51- 058-5-175
Chrome Plated ................51-058-9-175
*Eastern Hemisphere sales only
Recessed Escutcheon
Specify: Style 20 Recessed Escutch-
eon with (specify*) finish, P/N (specify*)
*Refer to Technical Data Sheet TFP770
Sprinkler Wrench
Specify: W-Type 6 Sprinkler Wrench,
P/N 56-000-6-387
Specify: W-Type 7 Sprinkler Wrench,
P/N 56-850-4-001