Tyco Rapidresponse TY2596, Rapidresponse LFII Series Quick Start Manual

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Series LFII Residential
Concealed Pendent Sprinklers, Flat Plate

4.2 K-factor

pressures, enabling smaller pipe sizes

General
Description

The Series LFII (TY2596) Residential
Concealed Pendent Sprinklers are
decorative, fast response, fusible sol­der sprinklers designed for use in resi­dential occupancies such as homes,
apartments, dormitories, and hotels.

The cover plate a sse mbly conceals
the sprinkler opera ting co mponents
abovetheceiling.The flatprofile of the
cover plate provides the optimum aes­thetically appealing sprinkler design.
In addition, the concealed design of
the Series LFII (TY2596) provides 1/2
inch (12,7 mm) vertical adjustment.
This adjustment reduces the accuracy
to which the fixed pipe drops to the
sprinklers must be cut to help assure
a perfect fit installation.

The Series LFII are to be used in wet
pipe residential sprinkler systems for
one- andtwo-family dwellings and mo­bile homes per NFPA 13D; wet pipe
residential sprinkler systems for resi­dential occupancies up to and includ­ing four stories in height per NFPA
13R;or, wet pipe sprinkler systems for
the residential portions of any occu­pancy per NFPA 13.

The Series LFII (TY2596) has a 4.2
(60,5) K-factor that provides the re­quiredresidential flowratesat reduced

IMPORTANT

Always refer to Technical Data
Sheet TFP700 for the “INSTALLER
WARNING” that provides cautions
with respect to handling and instal­lation ofsprinkler systems and com­ponents. Improper handling and in­stallation can permanently damage
a sprinkler system or its compo­nents and cause the sprinkler to fail
tooperate in afire situationor cause
it to operate prematurely.

and water supply requirements.
The Series LFII (TY2596) has been

designed wi th heat sensiti vity and
water distribution characteristics
provento helpin thecontrol ofresiden­tial fires and to improve the chance for
occupants to escape or be evacuated.

The Series LFII (TY2596) Residential
Concealed Pendent Sprinklers are
shipped with a Disposable Protective
Cap.The ProtectiveCap istemporarily
removed for installation, and then it
can be replaced to help protect the
sprinkler while the ceiling is being in­stalled or finished. The tip of the Pro­tective Cap can also be used to mark
the center of the ceiling hole into plas­ter board, ceiling tiles, etc. by gently
pushingthe ceiling productagainst the
Protective Cap. When the ceiling in­stallation is complete the Protective
Cap is removed and the Cover Plate
Assembly installed.

WARNINGS

The Series LFII (TY2596) Residential
Concealed Pendent Sprinklers de­scribed herein must be installed and
maintained in complian ce with this
document, as well as with the applica­ble stand ar ds of the National Fir e Pro­tection Association, in addition to the
standardsof any other authoritieshav­ing jurisdiction. Failure to do so may

impair the performance of these de­vices.

The owner is responsible for maintain­ing their fire protection system and de­vices in proper operating condition.
The installing contractor or sprinkler
manufacturer should be contacted
with any questions.

Sprinkler/Model
Identification
Number

SIN TY2596

Technical
Data

Approvals:

UL and C-UL Listed. NYC Approved
under MEA 44-03-E.

Maximum Working Pressure:

175 psi (12,1 bar)

Discharge Coefficient:

K=4.2GPM/psi

Temperature Rating:

160°F/71°C Sprinkler with
135°F/57°C Cover Plate

Vertical Adjustment:

1/2 inch (12,7 mm)

Finishes:

Cover Plate:
Flat White, Bright White, Chrome, or
Custom

Physical Characteristics:

Body ..............Brass

Cap . . . . . . . . . . . . . . Bronze

Saddle.............Brass

SealingAssembly..........

. . . . . Beryllium Nickel w/ Teflon†

Soldered Link Halves . . . . . Ni ck el

Lever . . . . . . . . . . . . . Bronze

Compression Screw . . . . . . Brass

Deflector........... Copper

1/2

(60,5 LPM/bar

1/2

)

Page 1 of 4 TFP440

JANUARY, 2006

Page2of4

TFP440

Minimum Flow

Maximum
Coverage

(a)

Area
Ft. x Ft.
(m x m)

12 x 12

(3,7 x 3,7)

14 x 14

(4,3 x 4,3)

16 x 16

(4,9 x 4,9)

18 x 18

(5,5 x 5,5)

20 x 20

(6,1 x 6,1)

(a) For coverage area dimensions less than or b etwee n those indicated, it is necessary to use the minimum required flow for the

next highest coverage area for which hydraulic design criteria are st ated.

(b) Requirement is based on minimum flow in GPM (LPM) from each sprinkler. The associated residua l pressures are calculated

using the nominal K-factor. Refer to Hy draulic Design Criteria Section for details.

Maximum

Spacing

Ft.

(m)

12

(3,7)

14

(4,3)

16

(4,9)

18

(5,5)

20

(6,1)

Residual Pressure

For Horizontal Ceiling

(Max. 2 Inch Rise

for 12 Inch Run)

160°F/71°C

Sprinkler

13 GPM (49,2 LPM)

9.6 psi (0,66 bar)

14 GPM (53,0 LPM)

11.1psi(0,77bar)

16 GPM (60,6 LPM)

14.5psi(1,00bar)

20 GPM (75,7 LPM)

22.7psi(1,57bar)

24 GPM (90,8 LPM)

32.7psi(2,25bar)

(b)

and

Minimum Flow

Residual Pressure
For Sloped Ceiling

(Greater Than 2 Inch

Rise Up To

Max. 4 Inch Rise

for 12 Inch Run)

160°F/71°C

Sprinkler

18 GPM (68,1 LPM)

18.4psi(1,27bar)

18 GPM (68,1 LPM)

18.4psi(1,27bar)

18 GPM (68,1 LPM)

18.4psi(1,27bar)

20 GPM (75,7 LPM)

22.7psi(1,57bar)

26 GPM (98,4 LPM)

38.3psi(2,64bar)

(b)

and

Minimum Flow

Residual Pressure
For Sloped Ceiling

(Greater Than 4 Inch

Rise Up To

Max. 8 Inch Rise

for 12 Inch Run)

160°F/71°C

Sprinkler

18 GPM (68,1 LPM)

18.4psi(1,27bar)

18 GPM (68,1 LPM)

18.4psi(1,27bar)

18 GPM (68,1 LPM)

18.4psi(1,27bar)
N/A

N/A

(b)

and

TABLE A

NFPA 13D AND NFPA 13R WET PIPE HYDRAULIC DESIGN CRITERIA

FOR THE SERIES LFII (TY2596) RESIDENTIAL CONCEALED PENDENT SPRINKLER

Guide Pin Housing . . . . . . Bronze

Guide Pins . . . . . . Stainless Steel

SupportCup .......... Steel

CoverPlate..........Copper

Retainer ............Brass

Cover Plate Ejection Spring . . . . .

............StainlessSteel

†DuPont Registered Trademark

Operation

When exposed to heat from a fire, the
Cover Pla te, w hic h i s no rma lly sol­dered to the Support Cup at three
points, falls away to expose the Sprin­kler Assembly. At this pointthe Deflec­tor supported by the Arms drops down
to its operated position. The fusible
link of the Sprinkler Assembly is com­prised of two link halves that are sol­dered together with a thin layer of sol­der. When the ra ted temperature is
reached, the solder melts and the two
linkhalves separateallowing the sprin­kler to activate and flow water.

Design
Criteria

The Series LFII (TY2596) Residential
Concealed Pendent Sprinklers are UL
and C-UL Listed for installation in ac­cordance with the following cr iteria.

When conditions exist that are outside

NOTE

thescope of the providedcriteria, refer
to the Residen tial Sprinkler Design
Guide TFP490 for the manufacturer’s
recommendationsthat may be accept­able to the Authority Having Jurisdic­tion.

System Type. Only wet pipe systems
may be utilized.

Hydraulic Design. The minimum re­quired 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 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.

Forsystems designed to NFPA13, the
number of design sprinklers is to be
the four most hydraulically demanding
sprinklers. The minimum required dis­chargefrom each of thefour 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 dischargeof 0.1gpm/sq.
ft. over the “design area” comprised
of the four most hydraulically de­manding sprinklers for the actual

coverage areas being protected by
the four sprinklers.

Obstruction To Water Distribution.

Locations of sprinklers are to be in
accordance with the obstruction rules
of NFPA 13 for residential sprinklers.

Operational Sensitivity. The sprin­klers are to be installed relative to the
ceiling mounting surface as shown in
Figure 3.

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
12ft. coverage area, or 20 feet fora 20
ft. x 20 ft. coverage area).

Installation

The Series LFII (TY2596) must be in­stalled in accordance with the follow­ing instructions:

NOTES

Damage to the fusible Link Assembly
during installation can be avoided by
handling the sprinkler by the frame
arms only (i.e., do not apply pressure
to the fusible link Assembly).

A leaktight 1/2 inchNPTsprinkler joint
should be obtained with a torque of 7
to 14 ft.lbs. (9,5 to 19,0 Nm). A maxi-