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TFP410
Page 3 of 10
Technical
Data
Approvals
• UL Listed for use with wet pipe and
dry pipe systems
• C-UL Listed for use only with wet
pipe systems
• NYC Approved under MEA 44-03-E
For details on these approvals, refer to
the Design Criteria section.
Maximum Working Pressure
175 psi (12,1 bar)
Discharge Coefficient
K=4.2 GPM/psi
1/2
(60,5 LPM/bar
1/2
)
Temperature Rating
155°F (68°C) or 175°F (79°C)
Finishes
• White Polyester
• Chrome Plated
• Natural Brass
Physical Characteristics
Frame . . . . . . . . . . . . . . . . . . . . Brass
Button . . . . . . . . . . . . . . . . . . . Bronze
Sealing Assembly . . . . . . . . Beryllium
Nickel w/Teflon*
Bulb (3 mm) . . . . . . . . . . . . . . . . Glass
Compression Screw . . . . . . . . Bronze
Deflector . . . . . . . . . . . . . . . . .Copper
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 RAPID RESPONSE Series LFII
Residential Horizontal and Recessed
Horizontal Sidewall Sprinklers (TY1334)
are UL and C-UL Listed for installa-
tion in accordance with the following
criteria.
Note:
When conditions exist that are
outside the scope of the provided
criteria, refer to the Residential
Sprinkler Design Guide TFP490 for
the manufacturer’s recommendations
that may be acceptable to the local
authority having jurisdiction.
*Registered trademark of Dupont
System Types
Per the UL Listing, wet pipe and dry
pipe systems may be utilized. Per the
C-UL Listing, only wet pipe systems
may be utilized.
• For dry systems corrosion-resistant
or internally galvanized pipe shall
be utilized with the sprinklers de-
scribed in this data sheet.
• For dry systems not using CPVC,
pendent sprinklers shall be installed
on return bends, where the sprin-
klers, return bends, and branch
line piping (that is, potential areas
for trapped water) are in areas at or
above 40°F (4°C).
Refer to technical data sheet TFP485
about the use of Residential Sprinklers
in residential dry pipe systems.
NOTICE
When corrosion-resistant or inter-
nally galvanized pipe and fittings with
a potable water supply is utilized,
return bends need not be installed.
However, any portion of the piping that
has the potential to trap water must
be maintained at or above 40°F (4°C)
unless provision to drain such areas is
provided and maintained dry.
Water Delivery
When using the Series LFII Residential
Horizontal Sidewall Sprinklers (TY1334)
in dry pipe sprinkler systems, the
requirements for “Dry System Water
Delivery” per the Section 8.3.4.3 of the
2010 edition of NFPA 13D apply. For
a residential hazard, in no case shall
the time of water delivery exceed 15
seconds for the most remote operating
sprinkler.
Hydraulic Design
(NFPA 13D and 13R)
The minimum re quired sprinkler flow
rate for systems designed to NFPA 13D
or NFPA 13R are given in Tables A, B,
C, D and E as a function of tempera-
ture 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.
NOTICE
The number of “design sprinklers”
specified in NFPA 13D and 13R for wet
pipe systems is to be applied when
designing dry pipe systems. There is
no need to increase the design area, as
is the case for density/area systems, in
accordance with U.S. Patent 7,712,543.
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 discharge from each of the
four sprinklers is to be the greater of
the following:
• The flow rates given in Tables A or B
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 hydraulical-
ly demanding sprinklers for actu-
al coverage areas protected by the
four sprinklers.
NOTICE
The number of “design sprin-
klers” specified in NFPA 13 for wet
pipe systems is to be applied when
designing dry pipe systems. There is
no need to increase the design area, as
is the case for density/area systems, in
accordance with U.S. Patent 7,712,543.
Obstruction to Water Distribution
Sprinklers are to be located in accor-
dance with the obstruction rules
defined by NFPA 13 for residential
sprinklers.
Operational Sensitivity
The sprinklers are to be installed with
an end-of- deflector-boss to wall
distance of 1-3/8 to 6 inches or in the
recessed position using only the Style
20 Recessed Escutcheon as shown in
Figure 2.
In addition the top-of-deflector-to-
ceiling distance is to be within the range
(Tables A, B, C, D or E) being hydrauli-
cally calculated.
Sprinkler Spacing
The minimum spacing between sprin-
klers is 8 feet (2,4 m). The maximum
spacing between sprinklers cannot
exceed the width of the coverage area
(Tables A and B) being hydraulically
calculated; (maximum 12 feet for a 12
ft. x 12 ft. coverage area, or 16 feet for
a 16 ft. x 20 ft. coverage area.