Senju Sprinkler RC-RES User manual

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Document No.U087473
Date ： Nov/20/2019
SENJU SPRINKLER CO., LTD.
Residential Lead Free Flat Concealed Sprinkler,
Pendent,
Model: RC-RES, K-Factor: 5.8, SIN: SS8561
GENERAL DESCRIPTION
The Model RC-RES Residential Flat Concealed Sprinklers are automatic sprinklers of the compressed fusible solder type. They
are decorative and fast responding. The Cover Plate Assembly hides the Deflector, Heat Responsive Element etc., which is
concealed above the ceiling. The cover plate has a flat profile, and its diameter is extremely small (2-5/8 inch, 68mm). The
push-on and/or thread-on, thread-off design of the concealed cover plate assembly allows for easy installation of the cover plate.
Therefore, the Model RC-RES should be your first choice when aesthetics is the major consideration for ultimate appeal and
unbeatable performance is desired. The Model RC-RES is designed for residential occupancies and is perfect for use in homes,
hotels and other living quarters.
The Model RC-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 RC-RES has a 5.8 (83.6 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 RC-RES provides 1/2 inch (12.8mm) vertical adjustment. This adjustment in
installation decreases the need for precise cutting of the pipe that drops to the sprinkler and allows for a perfect fit with a range of
pipe lengths.
The heat sensitivity and water distribution design of Model RC-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.
“Lead Free” is defined in the Reduction of Lead in Drinking Water Act (S.3874) endorsed by AWWA’s Water Utility Council, and
California Assembly Bill #1953 as having less than or equal to a weighted average of 0.25% lead in wetted surface of pipes,
plumbing fittings and fixtures.
WARNINGS
The Model RC-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.

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Document No.U087473
Date ： Nov/20/2019
TECHNICAL DATA
Approvals: cULus Listed
NSF/ANSI/CAN 61, NSF/ANSI 372
Sprinkler Identification Number (SIN): SS8561
Maximum Working Pressure: 175psi (12.1bar)
Discharge Coefficient (Nominal K-Factor):
K=5.8 GPM/psi1/2 (83.6 LPM/bar1/2)
Temperature Rating:
162°F (72°C) Sprinkler with 140°F (60°C) Cover Plate
175°F (79°C) Sprinkler with 140°F (60°C) Cover Plate
205°F (96°C) Sprinkler with 162°F (72°C) Cover Plate
Color Code (Sprinkler)
162°F (72°C): Uncolored
175°F (79°C): White
205°F (96°C): White
Color Code (Cover Plate)
140°F (60°C): No Mark
162°F (72°C): White-Colored Mark
Vertical Adjustment: 1/2 inch (12.8 mm)
Cover Plate Finishes:
Standard Finishes-
White, Ivory, Beige, Brown, Black, Nickel,
Wood Grain
Custom Finishes-
Custom color and custom pattern cover plates are
available on special order. Contact a Senju
Sprinkler representative with any custom orders.
Please see chart on Page 8 for more detail.
Physical Characteristics: Ref. Figures 1 and 1-1
FIGURE 1. Model RC-RES K=5.8
FIGURE 1-1. Marking (Color Code)
OPERATION
In case of fire, the solder component that holds together the Cover Plate and the Retainer melts. Then the Cover Plate is
released at once. As a result, the Deflector drops down to the intended position. Two Heat Collectors are exposed to fire, and
when sufficient heat from the fire is reached, internal components of the sprinkler fall apart. This leads to the water flow to be
distributed on the affected fire area. (Ref. Figure 2)
FIGURE 2. OPERATION PROCESS
（ The figure is for illustrative purposes only ）

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Document No.U087473
Date ： Nov/20/2019
DESIGN CRITERIA
The herein stated rules for use and installation of Model RC-RES are provided by the manufacturer and must be strictly
implemented for safe and full results.
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 Model RC-RES must not be used in applications where the air pressure above the ceiling is greater than that below.
Inspect all sprinklers after installation to ensure that both the gap between the cover plate, ceiling and the 6 slots in the
cup are open and free from any air flow impediment.
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.
Use only the Cover Plate provided for the Model RC-RES. 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 RC-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 RC-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
Temperature Rating of the
Cover Plate Assembly
Ordinary 162°F (72°C) 100°F (38°C) 140°F (60°C)
Intermediate 175°F (79°C）150°F (66°C) 140°F (60°C) 1)
Intermediate 205°F (96°C) 150°F (66°C) 162°F (72°C)
1) Maximum ambient temperature for the Cover Plate Assembly is 100°F (38°C).
Precautionary Warnings for Corrosive Environments
Model RC-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/or leakage in the sprinkler system.

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Document No.U087473
Date ： Nov/20/2019
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 SS8561
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)
16
(60.6)
7.6
(0.52)
16
(60.6)
7.6
(0.52)
16
(60.6)
7.6
(0.52)
14×14
(4.3×4.3)
14
(4.3)
16
(60.6)
7.6
(0.52)
16
(60.6)
7.6
(0.52)
16
(60.6)
7.6
(0.52)
16×16
(4.9×4.9)
16
(4.9)
16
(60.6)
7.6
(0.52)
16
(60.6)
7.6
(0.52)
16
(60.6)
7.6
(0.52)
18×18
(5.5×5.5)
18
(5.5)
17
(64.4)
8.6
(0.59) ――17 (64.4)
8.6
(0.59)
20×20
(6.1×6.1)
20
(6.1)
20
(75.7)
11.9
(0.82)
20
(75.7)
11.9
(0.82)
20
(75.7)
11.9
(0.82)
Smooth
Ceilings
3/8 to 7/8
Inches.
Beamed
Ceilings
per NFPA
13D, 13R
or 13
Installed in
beam
3/8 to 7/8
inches
below
bottom of
beam.
Concealed
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.U087473
Date ： Nov/20/2019
INSTALLATION
The Model RC-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 Protective Cap.
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 Protective Cap must remain on the sprinkler during installation. After the installation is completed, the Protective
Cap 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 NR-H model wrench socket for installation of RC-RES sprinklers. Use of any other wrench or socket is
prohibited and may cause damage to the sprinkler.
In case of insufficient adjustment in Cover Plate installation, do not try to overly tighten, screw the sprinkler too loosely
or make any modification to the cover plate assembly. Readjust the sprinkler fitting for a better fit.
Do not rotate the Cap Remover RC to the left with force when placing the two hook arms into place. The installed
sprinkler may become loosened, which may cause water leakage.
Installing Procedure
Step 1
The installation requirements for the sprinkler are as follows: to be installed only in the pendent position with the waterway
perpendicular to the ceiling. Install the sprinkler fitting so that the distance from the face of the fitting to the mounting surface
will be nominally 2 inches (50.8mm) as shown in Figure 3.
Step 2
With pipe thread sealant applied to the threads, hand tighten the sprinkler into the sprinkler fitting. Then tighten it with the
Socket NR-H or Ratchet (3/8” drive) & Socket NR-H Combination (Ref. Figure 4). The teeth of the Socket must fit perfectly
with the grooves on the Sprinkler for proper installation (Ref. Figure 4).
Step 3
If desired, the Protective Cap may also be used to locate the center of the clearance hole by gently pushing the ceiling
material against the center point of the Protective Cap. Before the installation of the ceiling, the sprinkler installation can be
started with a 2-3/8 inch (60mm) diameter clearance hole (Ref. Figure 3). Use the “Vertical Adjustment” indicator on the
Protective Cap to check for proper installation height (Ref. Figure 3).
Step 4
Use the Cap Remover RC to remove the Protective Cap (Ref. Figure 5), and then push or screw a Cover Plate Assembly on
the Cup of the Sprinkler by hand until its flange just has contact with the ceiling (Ref. Figure 6 and Figure 7). Stop tightening
the Cover Plate Assembly once the flange has contact with the ceiling. If the ceiling has been lifted from its normal position in
the process of tightening the Cover Plate Assembly, readjust the cover plate assembly as necessary. If the flange of the Cover
Plate Assembly cannot contact the ceiling sufficiently, readjust the sprinkler fitting as necessary. When properly installed,
there is a nominal 1/16 inch (1.6mm) air gap between the lip of the Cover Plate and the ceiling, as shown in Figure 6.
FIGURE 3. INSTALLATION FIGURE 4. RATCHET & SOCKET

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Document No.U087473
Date ： Nov/20/2019
FIGURE 5. PROTECTIVE CAP REMOVAL
FIGURE 6. INSTALLATION (COVER PLATE ASSEMBLY)
FIGURE 7. INSTALLATION (CORRECT and INCORRECT)

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Document No.U087473
Date ： Nov/20/2019
CARE AND MAINTENANCE
The following instructions must be implemented for the maintenance and service of the Model RC-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 a Cover Plate Assembly may delay the response time of the sprinkler in case of a fire.
Install the cover plate assembly properly, as shown in Figure 6. Improper installation of the cover plate assembly may
cause improper operation or non-operation.
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 replaced, if necessary, by factory painted cover
plates. Non-factory applied paint may adversely delay or prevent sprinkler operation in case of a fire.
Do not pull the Cover Plate. Separation may result.
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.
Leaking or corroded sprinklers must be replaced.
Automatic Sprinklers must be kept in a cool and dry place.
Automatic sprinklers 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 RC-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.

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Document No.U087473
Date ： Nov/20/2019
ORDER PROCEDURE
When placing an order, please contact a local distributor with the following information (Model Name, Temperature Rating and
Finish).
Sprinkler
Model: RC-RES
(SIN: SS8561, Residential Flat Concealed Sprinkler, Pendent, K5.8, Temperature: 162°F (72°C) or 175°F (79°C) or
205°F (96°C))
Cover Plate Assembly
2-5/8 inch (φ68mm) or 3-1/4 inch (φ83mm) or 2-5/8 inch square (□68mm), Order Separately from Sprinkler
Please refer to the chart below for available sizes, temperature, and finishes.
Standard Finishes Custom Finishes
White Ivory Beige Brown Black Nickel Copper Wood Grain Custom Color Custom Pattern
2-5/8" Round, 140°F ○○- - - - - - ○○
3-1/4" Round, 140°F ○○○○○○○○○○
2-5/8" Square, 140°F ○- - - - - - - ○○
Tools for Installation of Model RC-RES
・Socket NR-H
For use with a 3/8” drive ratchet (not included)
・Socket NR-H Plastic
For use with a 1/2” drive ratchet (not included)
・Cap Remover RC