Reliable RFS42 Manual

The Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523
Model RFS42
Residential Flat Concealed
Horizontal Sidewall
Sprinkler (SIN RA4835)
Coverage to 16 ft. x
20 ft. (4.9 mx6.1 m)
Features
1. Flat cover plate (Solid or Perforated) for a flush, concealed
wall finish.
2. 4.2 (60 metric) K-Factor.
3. Sized to fit in a 3
1/2” or larger stud space even when
installed directly in a TorqueSafeTM 90° Sprinkler Head
Elbow** and several other common 1/2” and 3/4” by 1/2”
sprinkler fittings.
4. Push-on/pull-off flat cover plate.
5. Sprinkler shipped complete with factory installed protective
cap.
6. Sprinkler assembly and cover plate packaged separately.
7. 1/8” (3.2 mm) cover plate adjustment.
8. Cover plate available, either solid or perforated, in a wide
variety of colors and finishes.
Listings and Approvals
1. Listed by Underwriters Laboratories Inc. and UL certified for
Canada (cULus).
UL Listing Category
Residential Automatic Sprinklers
UL Guide Number
VKKW
Patents:
U.S. Patent No. 7,353,882, other Patents pending
Product Description
The Reliable Model RFS42 Concealed Residential Extended
Coverage Horizontal Sidewall Sprinkler is an attractive,
concealed sprinkler assembly specially sized to fit within a 3
1/2”
or larger stud space. The sprinkler uses a push-on/pull-off flat
cover plate assembly. The sprinkler assembly is shipped with a
protective cap.
The flat cover plate is attached to the skirt using 135 °F
(57 °C) ordinary temperature classification solder. The sprinkler
is installed into the sprinkler fitting using the Model G6 Sprinkler
Wrench.
When the ambient temperature rises, the solder holding the
cover plate melts, allowing the release of this part and thus
exposing the sprinkler inside to the rising ambient temperature.
This sprinkler is listed for a maximum service pressure of
175 psi (12.0 bar).
Application and Installation
The Model RFS42 sprinkler is intended for installation in
the residential portions of any occupancy in accordance with
NFPA 13, 13R and 13D. The sprinkler is listed as a Concealed
Residential Horizontal Sidewall Sprinkler using a smooth, flat,
horizontal ceiling. System design and installation requirements
for other ceiling configurations are described in NFPA 13, 13R
or 13D, as applicable.
The minimum listed spacing between Model RFS42 sprinklers
is 8 ft (2.4 m).
The low flow RFS42RES sprinklers are specifically engineered
to meet the latest residential sprinkler listing standards (UL 1626
Standard).*
The sprinkler must be installed and properly oriented with the
Model G6 Wrench, as follows:
Do not remove the factory installed plastic protective cap
since it is sized to fit inside the G6 wrench. Note that the
sprinkler can only mate when the sprinkler’s deflector orientation
tab (Fig. 1) is aligned with wrench’s key-way. The G6 wrench
is provided with bubble level pad and TOP marking, to allow
the proper orientation of the horizontal sidewall deflector. Final
leveling can be done after leak proof joint is obtained with a
minimum to maximum torque of 8 to 18 ft-lb (11 to 24 N-m).
Leave the protective cap on to protect the sprinkler while the
wall is plastered, wallpapered or painted. The protective cap
must be removed and the listed cover plate installed prior to
the sprinkler system being placed in service. A 2
5/8” (67 mm)
diameter hole must be cut in the wall for the sprinkler assembly
to extend through.
Concealed cover plate/cup assemblies are listed only for use
with specific sprinklers. The use of any other concealed cover
plate/cup assembly with the Model RFS42 Horizontal Sidewall
Sprinkler or the use of this dedicated concealed cover plate
assembly on any sprinkler with which it is not specifically listed
will void all guarantees, warranties, listings and approvals.
* Effective date 3/14/2008 **Spears Manufacturing Company
Multilingual document:
Select your language below
Bulletin 048 Rev. A_Multilingual
Bulletin 048 Rev. A_Multilingual

2
048FG01 G
Technical Data
Orifice Size “K” Factor Thread Size Maximum Ambient
Temperature
Maximum
Water Working
Pressure
Sprinkler Identifi-
cation Number
(SIN) Approvals
US Metric
3/8” (9.6 mm) 4.2 60 1/2” NPT (R 1/2)100 °F (38 °C) 175 psi (12 bar) RA4835 cULus
Listed Design Criteria***
Max. Coverage Area
Width x Length Deflector to Ceiling Dimension Flow Rate Pressure Temperature Rating
ft. x ft. m x m inches mm gpm l/min psi bar Sprinkler Cover
12x12 3.6x3.6 4 - 6 102 - 152 12 45.4 8.2 0.57
165 °F (74 °C) 135 °F (57 °C)
12x12 3.6x3.6 6 - 12 152 - 305 13 49.2 9.6 0.67
14x14 4.3x4.3 4 - 6 102 - 152 12 45.4 8.2 0.57
14x14 4.3x4.3 6 - 12 152 - 305 14 53.0 11.1 0.78
16x16 4.9x4.9 4 - 12 102 - 305 16 60.6 14.5 1.01
16x18 4.9x5.5 4 - 12 102 - 305 18 68.1 18.4 1.29
16x20 4.9x6.1 4 - 6 102 - 152 22 83.3 27.4 1.92
16x20 4.9x6.1 6 - 12 152 - 305 23 87.0 30.0 2.10
***For NFPA 13 systems calculate for a minimum design density of 0.1 gpm/sf, but in no case go below the Listed Design Criteria Flow Rate and Pressure.
Material Data
Bronze Sprinkler Body, Spring Closure Cap, Yoke, Lever, Slide Pin, Slide Plate, Deflector, Set Screw
Brass Cover Plate, Sprinkler Sleeve, Frame Arms
Stainless Steel Push Spring, Ball, Load Screw, Rivet
Copper Plated Steel Cover Plate Skirt
Nickel Alloy Fusible Element
Nickel Alloy coated with PTFE Adhesive Tape Sealing Washer
Fig. 1
2” ± 1/16” (51 mm ± 1.6 mm)
DEFLECTOR ORIENTATION TAB
1/2” - 14” NPT
RECOmmENDED
WALL HOLE DIAMETER
25/8” (66.7 mm)
13/8” ± 1/16” (34.6 mm
±1.6 mm)
CEILING
43/8” - 123/8”*
(111 mm - 314 mm)
FRONT VIEW PUSH ON/PULL OFF
FLAT COVERPLATE REMOVED
DEFLECTOR ORIENTATION TAB
3/16” (4.8 mm)
PUSH ON/PULL OFF
FLAT COVERPLATE 35/16”
(84.1 mm) DIA.
*SEE LISTED DESIGN CRITERIA TABLE FOR FLOW RATE AND PRESSURE
BASED ON DEFLECTOR TO CEILING DISTANCE. DEFLECTOR IS
3/8” (9.5 mm) ABOVE CENTERLINE OF SPRINKLER.

3
048FG02D
048FG03B
Fig. 2 – Front View
Attachment Method:
Fig. 3:
1. Securely support pipe from adjacent stud.
2. Pipe support clamp shall be located within 1” (25 mm) of sprinkler fitting’s inlet lip.
3. The center of the sprinkler fitting shall be located at a horizontal distance of 1
3/8” [35 mm] or more from the stud (Fig. 3).
4. The sprinkler fitting shall be installed so that the rear of the sprinkler is 2
1/16” +/− 1/16” from the finished surface of the wall.
Verify wall assembly dimensions prior to installation to ensure that the cover plate attaches to the sprinkler and seats against the
finished wall surface (Fig. 1).
Installation Guide for 3
1/2” or Larger Stud Space
RFS42 Residential Flat Cover Concealed Horizontal Sidewall Sprinkler SIN RA4835
Fig. 3
*SEE LISTED DESIGN CRITERIA TABLE FOR FLOW RATE AND PRESSURE
BASED ON DEFLECTOR TO CEILING DISTANCE. DEFLECTOR IS
3/8” (9.5 mm) ABOVE CENTERLINE OF SPRINKLER.
CEILING
ELBOW
CENTERLINE OF 25/8”
(66.7 mm) DIAMETER
HOLE IN WALL
LOCATE PIPE SUPPORT
CLAMP WITHIN 1”
(25 mm) FROM SPRINKLER
FITTING’S INLET
43/8” - 123/8”*
(111 mm - 314 mm)
CENTERLINE
STUD
13/8”
(35 mm)
MINIMUM
CENTERLINE
CENTERLINE
ROOM
ELBOW
WALL FINISH MATERIAL
STUD
MINIMUM 13/8” (35 mm)
31/8” (79 mm)
*DIMENSIONS ON THIS FIGURE ARE BASED ON A SPEARS TORQUESAFE™
3/4”x 1/2” 90°SPRINKLER HEAD ELBOW (4207-101). DIMENSIONS
MUST BE ADJUSTED IF OTHER FITTINGS ARE USED.

The Reliable Automatic Sprinkler Co., Inc.
[phone] Sales Offices
[phone] Sales Fax
[phone] Corporate Offices
www.reliablesprinkler.com Internet Address
Manufactured by Recycled
Paper
Revision lines indicate updated or new data.
The equipment presented in this bulletin is to be installed in accordance with the latest published Standards of the National Fire Protection Association, Factory
Mutual Research Corporation, or other similar organizations and also with the provisions of governmental codes or ordinances whenever applicable. Products
manufactured and distributed by Reliable have been protecting life and property for over 90 years, and are installed and serviced by the most highly qualified
and reputable sprinkler contractors located throughout the United States, Canada and foreign countries.
Maintenance
Model RFS42 Concealed Sprinklers should be inspected
and maintained in accordance with NFPA 25. Do not clean
sprinklers with soap and water, ammonia or any other cleaning
fluids. Remove dust by using a soft brush or gentle vacuuming.
Replace any sprinkler or cover plate assembly, which has
been painted (other than factory applied) or damaged in any
way. A stock of spare sprinklers should be maintained to allow
quick replacement of damaged or operated sprinklers. Prior
to installation, sprinklers should be maintained in their original
cartons and packaging until used to minimize the potential for
damage to sprinklers that would cause improper operation or
non-operation. Once operated automatic sprinklers and cover
plates cannot be reassembled and reused. New sprinklers of
the same size, type and temperature rating must be installed.
A cabinet of replacement sprinklers should be provided for this
purpose.
Model RFS42 Residential Flat Cover
Concealed Horizontal Sidewall
Sprinkler Specification
Sprinklers shall be a UL listed as residential flat cover
concealed horizontal sprinkler with RFS42 deflector and
adjustable cover plate for light hazard, interior, non-corrosive
applications. Sprinklers to be of bronze frame construction with
brass cover plate and copper alloy retainer flange assembly.
Water seal assembly shall consist of a Teflon* coated Belleville
spring washer and machined brass cup containing no plastic
parts. Method of attaching the cover plate to the sprinkler cup
shall be a Push-on and Pull-off design allowing a 1
/
8” cover plate
adjustment. Sprinklers shall have a nominal K-factor of 4.2
(60 metric) and 1/2” NPT thread. Sprinkler temperature rating
shall be 165 °F (74 °C) with a cover plate temperature rating
of 135 °F (57 °C). Sprinklers shall be capable of a maximum
coverage area of 16 ft. x 20 ft. (4.9 mx6.1 m), with a minimum
lateral spacing of 8 ft. (2.4 m). Rated working pressure shall be
175 psi (12.0 bar). A plastic protective cap shall be provided
and factory installed onto the sprinkler cup to protect the
sprinkler from damage, which could occur during construction
before the cover plate is installed. Cover plate type: [Solid]
[Perforated]. Cover plate finish: [White] [Custom Color–specify].
Residential Coverage Concealed horizontal sidewall sprinklers
shall be Reliable Model RFS42. SIN RA4835 (Bulletin 048).
Cover Plate Finishes(1)
Standard Finish
White
Special Application Finishes
Flat White Paint
Off White Paint
Black Paint
Custom Color Paint
Bright Brass
Bronze
Chrome
Satin Chrome
Black Plating
(1) Other colors and finishes are available. Consult factory for details.
Note: Paint or any other coatings applied over the factory finish
will void all approvals and warranties.
Ordering Information
Specify:
1. Model RFS42 Residential Sidewall
2. Cover Plate Type: Solid or Perforated
3. Cover Plate Finish
Installation Wrench
Model G6 Sprinkler Wrench
Installation Aid
A protective plastic cap is included for use during installation.
*DuPont Registered Trademark
EG. Printed in U.S.A. 01/15 P/N 9999970457