Senju Sprinkler FR-RES User manual

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Document No.U087143 Date ： Oct/18/2019
SENJU SPRINKLER CO., LTD.
Residential, Pendent and Recessed Pendent Sprinkler
Model FR-RES K-Factor: 4.9 SIN: SS4451
GENERAL DESCRIPTION
The Model FR-RES Residential Pendent and Recessed Pendent Sprinklers are fusible link type automatic sprinklers. They are
durable and fast responding. The Model FR-RES is designed for residential occupancies and is perfect for use in homes, hotels
and other living quarters.
The Model FR-RES is to be used in wet pipe residential sprinkler systems for One- and Two- Family Dwellings and
Manufactured 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 occupancies per NFPA
13.
The Model FR-RES has a 4.9 (70.6 LPM/bar1/2) K-factor that meets the required residential flow rates with minimal residual
pressure, which allows for smaller pipe sizes and water supply requirements.
For extended installation flexibility, the Model FR-RES provides 1/2 inch (12.7mm) vertical adjustment with the D1 or D3
Recessed Escutcheon.
NOTICE
The heat sensitivity and water distribution design of Model FR-RES allows for an increased chance of residents to
escape or evacuate in case of a fire. However, residential fire sprinkler systems are not a substitute for fire safety
awareness or fire safety construction required by building codes.
WARNINGS
The Model FR-RES must be installed and maintained in accordance with the rules stated herein as well as in
compliance with the applicable standards of the National Fire Protection Association regulations and the standards of
any other authorities having jurisdiction.
In the event of this condition, consult the authorities having jurisdiction for guidance and approval.
Failure to do so may impair the integrity of these devices.
It is the responsibility of the installing contractor to provide a copy of this document to the owner or their
representative, and in turn, it is the obligation of the owner to provide a copy of this document to a succeeding owner.
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 related questions.
TECHNICAL DATA
Approvals: cULus Listed
Sprinkler Identification Number (SIN): SS4451
Maximum Working Pressure: 175psi (12.1bar)
Discharge Coefficient (Nominal K-Factor): K=4.9 GPM/psi1/2 (70.6 LPM/bar1/2)
Temperature Rating: 162°F (72°C), 175°F (79°C), 205°F (96°C)
Color Code
162°F (72°C): Uncolored
175°F (79°C): White
205°F (96°C): White
Vertical Adjustment: 1/2” (12.7mm)
Finishes
Sprinkler: Natural Brass, White Painted, Black Painted, Chrome Plated
Recessed Escutcheon: Brass Plated, White Painted, Black Painted, Chrome Plated

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Document No.U087143 Date ： Oct/18/2019
FIGURE 1. Model FR-RES K4.9
OPERATION
The sprinkler assemblies fusible link is comprised of two link halves that are joined together with a thin layer of solder. When
the rated temperature is reached, the solder melts and the two link halves separate. This leads to the water flow to be
distributed on the affected fire area.
FIGURE 2. OPERATION PROCESS (The figure is for illustrative purposes only)

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Document No.U087143 Date ： Oct/18/2019
DESIGN CRITERIA
The herein stated rules for use and installation of Model FR-RES are provided by the manufacturer and must be strictly
implemented for safe and full results. Only the D1 or D3 Recessed Escutcheon, as applicable, is to be used for recessed
pendent installations. D1 Recessed Escutcheons are not listed for use with the 205°F heads. D3 Recessed Escutcheons are
required for the 205°F heads.
NOTES
Residential Fire Sprinkler Systems should only be designed and installed by individuals who are completely familiar
with automatic sprinkler system design, installation procedures, and techniques.
Several criteria may apply to the installation and usage of each sprinkler. Consequently, it is recommended that the
sprinkler system designer review and develop a working understanding of the complete list of criteria prior to
initiating the design of the sprinkler system.
Questions concerning sprinkler installation and usage criteria, which are not covered by the following instructions,
should be submitted to your contracted company. Include sketches and technical details, as appropriate.
In some instances, the requirements of this document may concern specifications which are more stringent, and
which take precedence over those specified in NFPA 13, 13D, 13R or by the authority having jurisdiction.
The spray from the sprinkler is distributed radially outward and downward from the sprinkler deflector. Consequently,
the sprinklers must be located such that there will be no blind spaces shielded from spray by partitions, room dividers,
overhangs or other parts of the dwelling structure.
The number of sprinklers within each compartment (as defined by NFPA 13, 13D or 13R) must be kept as few as
possible. Do NOT use more sprinklers than necessary to cover a particular space.
The sprinkler must be secured in place by firmly fastening the sprinkler system piping to the structure. If the sprinkler
is not properly secured in position, reaction forces resulting from sprinkler operation could alter its orientation and its
water distribution pattern.
Obstruction to Water Distribution
Locations of sprinklers must follow the obstruction rules of NFPA 13, 13D and 13R for Residential Sprinklers.
General Service Conditions
The Model FR-RES must only be utilized in WET PIPE sprinkler systems.
Heat Source Criteria
Refer to NFPA 13D, 13R or 13 for the requirements relating to the prevention of possible activation of the Heat Responsive
Element of Model FR-RES, due to the exposure of a heat source other than an actual fire.
Available Sprinkler Temperature Ratings
Sprinkler Temperature Classification Sprinkler Nominal Temperature Rating Maximum Ambient Ceiling Temperature
Ordinary 162°F (72°C) 100°F (38°C)
Intermediate 175°F (79°C)
205°F (96°C) 150°F (66°C)
Precautionary Warnings for Corrosive Environments
Model FR-RES sprinklers should not be installed where they may be subjected to a corrosive environment including the
following:
(1) Chlorine ion and Chloride environment.
Stress corrosion cracking may be caused by exposure to environments with Chlorine ion and Chloride. Exposure to this
environment may result in sprinklers operating under Non-Fire conditions or Not Operating when exposed to an actual fire.
(2) Sprinkler system piping with Copper.
Sprinkler systems should be constructed in compliance with the applicable standards and the requirements for copper piping
when copper piping is used in the sprinkler system. (Reference standards NFPA 13, ASTM B813, B828, and CDA (Copper
Development Association) – Solder Joint)
All residual flux must be removed from the interior and exterior of the copper piping by thoroughly flushing before installation
of the Sprinkler Heads. Otherwise, residues of flux may cause corrosion and leakage in the sprinkler system.

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Document No.U087143 Date ： Oct/18/2019
Hydraulic Design Criteria
The minimum required sprinkler flow rates for systems designed to NFPA 13D or 13R are given in TABLE A as a function of
temperature rating and the maximum allowable coverage area. The sprinkler flow rate is the minimum required discharge from
the most hydraulically demanding sprinkler from each of the total number of “design sprinklers” as specified in NFPA 13D or
13R.
For systems designed to NFPA 13, the number of designed 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 A for NFPA 13D and 13R as a function of temperature rating and maximum allowable
coverage area.
・ A minimum discharge of 0.1GPM/sq.ft. [4.07LPM/sq.m] over the “design area” comprised of the four most hydraulically
demanding sprinklers for the actual coverage area being protected by the four sprinklers.
TABLE A. NFPA 13D & 13R WET PIPE HYDRAULIC DESIGN CRITERIA for Model SS4451
For systems with ceiling types smooth flat horizontal, or beamed, or sloped, in accordance with NFPA 13D, 13R or 13 as
applicable.
Ordinary
Temperature Rating
162°F (72°C)
Intermediate
Temperature Rating
175°F (79°C)
Intermediate
Temperature Rating
205°F (96°C)
Maximum
Coverage
Area
(a)
Ft. × Ft.
(m × m)
Maximum
Spacing
Ft.
(m)
Flow
(b)
GPM
(LPM)
Pressure
(b)
PSI
(bar)
Flow
(b)
GPM
(LPM)
Pressure
(b)
PSI
(bar)
Flow
(b)
GPM
(LPM)
Pressure
(b)
PSI
(bar)
Deflector
to
Ceiling
Installation
Type
Minimum
Spacing
Ft.
(m)
12×12
(3.7×3.7)
12
(3.7)
13
(49.2)
7.0
(0.48)
13
(49.2)
7.0
(0.48)
13
(49.2)
7.0
(0.48)
14×14
(4.3×4.3)
14
(4.3)
13
(49.2)
7.0
(0.48)
13
(49.2)
7.0
(0.48)
13
(49.2)
7.0
(0.48)
16×16
(4.9×4.9)
16
(4.9)
13
(49.2)
7.0
(0.48)
― ― 13
(49.2)
7.0
(0.48)
18×18
(5.5×5.5)
18
(5.5)
17
(64.4)
12.0
(0.83)
17
(64.4)
12.0
(0.83)
17
(64.4)
12.0
(0.83)
20×20
(6.1×6.1)
20
(6.1)
20
(75.7)
16.7
(1.15)
20
(75.7)
16.7
(1.15)
20
(75.7)
16.7
(1.15)
Smooth
Ceilings
1-1/16 to 4
Inches.
Beamed
Ceilings
per NFPA
13D, 13R
or 13
Installed in
beam
1-1/16 to
1-9/16
inches
below
bottom of
beam.
Pendent
or
Recessed
Pendent
8
(2.4)
(a) For coverage area dimensions less than the above mentioned, it needs to use the minimum required flow for the
Next Higher Coverage Area listed.
(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.
Sprinkler Spacing Criteria
The minimum spacing between sprinklers is 8 feet (2.4m). The maximum spacing between sprinklers cannot go beyond the
coverage area calculated by using the specific hydraulic factors. (Ref. TABLE A)

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Document No.U087143 Date ： Oct/18/2019
INSTALLATION
The Model FR-RES must be installed in accordance with the following instructions:
NOTES
Do not use any sprinklers which have been subjected to potential mechanical damage. Do not use any sprinklers
which show deformation or cracking in either the Sprinkler or the Protector.
Prior to installation, sprinklers should be maintained in the original cartons and packaging until used to minimize the
potential for damage to the sprinklers that could cause improper operation or non-operation.
The Protector must remain on the sprinkler during installation. After the installation is completed, the Protector must
be removed to place the sprinkler in service.
Use a torque of 7 to 14 ft·lbs (9.5 to 19.0 N·m) to achieve a 1/2 inch NPT sprinkler joint. If you exceed the recommended
maximum torque, this could result in damage to the sprinkler inlet, which may lead to leakage from the sprinkler.
Use only Wrench FR-S or Socket FR-H for installation of Model FR-RES sprinklers. Use of any other wrench or socket
is prohibited and may cause damage to the sprinkler.
Do not over or under tighten the sprinkler due to an inadequate adjustment of the D1 or D3 Recessed Escutcheon.
Re-adjust the sprinkler fitting to correct the position.
Installing Procedure
Install Model FR-RES sprinklers by the steps and figures shown below. Use only D1 or D3 Recessed Escutcheons with Model
FR-RES sprinklers. (D1 Recessed Escutcheons are not listed for use with the 205°F heads. D3 Recessed Escutcheons are
required for the 205°F heads.) Use of any other recessed escutcheon is prohibited and may void the warranty and approvals.
Model FR-RES sprinklers are only to be installed in the pendent position with the waterway perpendicular to the ceiling.
Step 1
Install the Inner Ring of the D1 or D3 Recessed Escutcheon over the sprinkler threads, as applicable. (Ref. Figure 3 and 4)
Step 2
Apply pipe-thread sealant to the threads. Begin hand-tightening the sprinkler into the sprinkler fitting in the pendent position.
Step 3
Using the Socket FR-H or Wrench FR-S, tighten the sprinkler into the sprinkler fitting with a torque of 7 to 14 ft·lbs (9.5 to 19.0
N·m). (Ref. Figure 5)
A 1/2" drive ratchet (not included) is required for use with the Socket FR-H.
Step 4
Remove the Protector by hand. (Ref. Figure 6)
Slide on the Outer Ring of the D1 or D3 Recessed Escutcheon over the Sprinkler and push the Outer Ring over the Inner
Ring until its flange comes in contact with the ceiling. (Ref. Figure 7)
FIGURE 3. PENDENT and RECESSED PENDENT SPRINKLER

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Document No.U087143 Date ： Oct/18/2019
FIGURE 4. INSTALLATION (CORRECT and INCORRECT)
FIGURE 5. INSTALLATION (WRENCH and SOCKET)
A 1/2" drive ratchet (not included) is required for use with the Socket FR-H.

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Document No.U087143 Date ： Oct/18/2019
FIGURE 6. PROTECTOR REMOVAL
FIGURE 7. INSTALLATION (RECESSED ESCUTCHEON)
CARE AND MAINTENANCE
The following instructions must be implemented for the maintenance and service of the Model FR-RES.
NOTES
Wet pipe sprinkler systems must be maintained at a minimum temperature of 40°F / 4°C to prevent freezing and
bursting of the pipe and/or sprinklers.
Automatic sprinklers are not to be tested with a heat source. Operation of the heat responsive element can result.
Absence of the Outer Ring from the D1 or D3 Recessed Escutcheon, which is used to cover the clearance hole, can
delay sprinkler operation in a fire situation.
In preparation for maintenance of the fire protection system, permission to close the main control valve must be
obtained from the proper authorities, and all affected parties by this action, and must be informed before the
maintenance session can commence.
Do NOT enclose any sprinklers within drapes, curtains, or valances.
Do NOT hang anything from the sprinklers.
Do NOT clean the sprinklers with soap and/or water, detergents, ammonia, cleaning fluids, or other chemicals.
Remove dust, lint, cobwebs, cocoons, insects, and larvae by gently brushing with a feather duster or gently
vacuuming with a soft bristle (i.e., dusting) brush attachment.
Exercise suitable safety precautions in the use and storage of highly flammable materials. The rapid rate of fire
development and spread of these materials can reduce the ability of the sprinkler system to aid in the control of a fire
involving such hazards.

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Document No.U087143 Date ： Oct/18/2019
Leaking or corroded sprinklers must be replaced.
Automatic Sprinklers must be kept in a cool and dry place.
Automatic sprinkler must never be physically altered, such as painted, plated, or coated, once shipped from the
factory. If the sprinklers have been in any way modified, they must be replaced.
Great caution must be applied to prevent damage to the sprinklers at all stages - before, during, and after installation.
Damaged units because of dropping, hitting, over-tightening, or wrench slippage, must be replaced.
The Model FR-RES must only be replaced with pendent sprinklers which are listed for residential fire protection
service and which have the same nominal K-Factor, the same coverage area, and the same or lower flow ratings (as
indicated under TABLE A “Hydraulic Design Criteria”).
When remodeling, such as by adding false beams or light fixtures or changing the location of compartment walls, first
verify that the new construction will not violate the installation requirements of the applicable standards of NFPA.
Alter the new construction and/or the sprinkler system to suit the requirements of this document and the applicable
NFPA regulations.
The owner is responsible for the maintenance of the sprinkler system, including inspection and testing of its
compliance with this document, as well as the standards of the National Fire Protection Association (e.g., NFPA 25),
and the regulations of any other authorities having jurisdiction. The owner should direct any questions regarding the
above rules and regulations to the installing contractors or the sprinkler manufacturer. It is recommended that
automatic sprinkler systems be inspected, tested, and maintained by a qualified Inspection Service in accordance
with NFPA 25.
Limited Warranty
For details of warranty, refer to Sales Contract.
ORDER PROCEDURE
When placing an order, please contact a local distributor with the following information (Model Name, Temperature Rating and
Finish).
Sprinkler
Model: FR-RES K4.9
Temperature Rating: 162°F (72°C), 175°F (79°C), 205°F (96°C)
Finishes: Natural Brass, White Painted, Black Painted, Chrome Plated
For SIN and combination of Recessed Escutcheon, refer to the table below.
Type SIN Temperature Recessed Escutcheon
Pendent 162°F, 175°F, 205°F ―
Recessed Pendent 162°F, 175°F D1 (1/2” total adjustment)
Recessed Pendent
SS4451
162°F, 175°F, 205°F D3 (1/2” total adjustment)
Recessed Escutcheon
Model: D1 Recessed Escutcheon (Inner Ring and Outer Ring, 1/2” total adjustment)
Model: D3 Recessed Escutcheon (Inner Ring and Outer Ring, 1/2” total adjustment)
Finishes: Brass Plated, White Painted, Black Painted, Chrome Plated
Tools for Installation
･ Wrench FR-S (Open-end wrench type)
･ Socket FR-H (Socket wrench type)
For use with a 1/2" drive ratchet (not included)