Reliable N25 User manual

The Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523
Bulletin 909
Bulletin 909
Model N25 (SIN RA0912)
Early Suppression
Fast Response Sprinkler
Product Description
The Reliable Model N25 Early Suppression Fast Re-
sponse Sprinkler (ESFR/Quick Response Storage Sprin-
kler) is intended for use against severe fire challenges.
This sprinkler is designed to respond quickly to growing
fires and will deliver a heavy water discharge to “sup-
press” rather than “control.”
Note: The Model N25 ESFR sprinkler utilizes a levered
fusible alloy solder link in either a 165°F (74°C) or a
212°F (100°C) rating. FM Global considers this a “Quick
Response” storage sprinkler for use per FM Data Sheet
8-9.
The sprinkler has a Nominal K Factor of 25.2 (metric
362) and will deliver approximately 98 gpm (371 L/min)
of water at 15 psi (1 bar).
The smaller deflector and frame provide a broad, very
symmetrical, hemispherical pattern capable of sup-
pressing fires between sprinklers in high storage height
areas and at the same time retaining a high momentum
central core to penetrate and suppress fires occurring
directly beneath the sprinkler in low storage height ar-
eas.
The N25 ESFR sprinkler is also less susceptible to
damage due to smaller deflector and frame design. The
lighter N25 ESFR passed rough use and abuse test in
the labs without plastic protectors.
Application and Installation
The Model N25 is an ESFR sprinkler is intended for
installation in accordance with NFPA 13 and is a QR
Storage Sprinkler for use in all FM Loss Prevention Data
Sheets as well as approval of the Authority Having Ju-
risdiction.
The Model N25 ESFR sprinkler is designed for ceiling
only sprinkler system with no in-rack sprinklers required.
Protection of (but not limited to) most encapsulated or
non-encapsulated (including cartoned unexpanded)
plastics. Model N25 ESFR is also use for protection of
cartoned exposed expanded plastics as well as some
storage arrangements of rubber tires, rolled paper, and
aerosols.
Model N25 ESFR Sprinkler
Design Criteria
General guidelines:
Sprinkler Position: Pendent, align frame arms with
the pipe. Deflectors should be parallel with the ceil-
ing or roof.
System Type: Wet Pipe Systems Only
Maximum area of coverage: 100 ft2(9.3m2), greater
coverage area are allowable in some cases.
Minimum area of coverage: 64 ft2(5.8m2)
Maximum slope ceiling: 2/12 pitch (9.5°)
Maximum spacing: 12 ft (3.7m) for building heights
up to 30 ft (9.1m) and 10 feet (3.1m) for building
heights greater than 30 ft (9.1m)
Minimum spacing: 8 feet (2.4m)
Deflector distance from walls: At least 4 inches
(102mm) from walls, and no more than one-half the
allowable distance permitted between sprinklers.
Deflector to Top of Storage: at least 36 in (914mm).
Deflector to ceiling Distance: 6 - 18 in (152 -
457mm).
Center Line of Thermal Sensing
Element To Ceiling Distance: 4 - 17 in (101.6 -
425mm).
Listings and Approvals
1. FM Approved as a quick response storage sprinkler.

Technical Data:
Classification
Sprinkler
Temperature Link
Color
Frame
Color
Maximum Ambient
Temperature Approvals
Sprinkler
Identification
Number
(SIN)
°F °C °F °C
Ordinary
Intermediate
165
212
74
100
Black
White
Uncolored
White
100
150
38
66
FM
FM RA0912
Material Data:
Frame Deflector Load Screw Lever Strut Link
Assembly Cap Washer Kick Spring
Brass Bronze Stainless
Steel
Stainless
Steel
Stainless
Steel
Beryllium Nickel,
Soldered Brass Beryllium Nickel
Stainless
Steel
2.
Fig. 1

3.
Storage Type NFPA FM
Open Frame (that is, no solid shelves)
Single, Double, Multiple-Row, or Portable Rack Storage
of Class I-IV and Group A or B Plastics
Refer to NFPA 13,
Chapters 16 and 17. Refer to FM 8-9.
Solid Pile or Palletized Storage of Class I-IV
and Group A or B Plastics
Refer to NFPA 13,
Chapters 14 and 15. Refer to FM 8-9.
Idle Pallet Storage Refer to NFPA 13,
Chapter 12. Refer to FM 8-24.
Rubber Tire Storage Refer to NFPA 13,
Chapter 18. Refer to FM 8-3.
Rolled Paper Storage (Refer to the standard) Refer to NFPA 13,
Chapter 19. Refer to FM 8-21.
Flammable Liquid Storage (Refer to standard) Refer to NFPA 30. Refer to FM 7-29.
Aerosol Storage (Refer to the standard) Refer to NFPA 30B. Refer to FM 7-31.
Automotive Components In Portable Racks
(Control mode only; refer to the standard)
Refer to NFPA 13,
Chapter 20. Refer to FM 8-1 and 8-9.
TABLE 1
COMMODITY SELECTION AND DESIGN CRITERIA OVERVIEW FOR
MODEL ESFR-25 PENDENT SPRINKLERS

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.
EG. Printed in U.S.A. 10/13 P/N 9999970454
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.
Installation Data
Sprinkler
Type
Thread
Size
“K” Factor Maximum
Working
Pressure
Finish
US Metric
Pendent
Only
1” NPT
(R1) 25.2 362 175 psi (12,1 bar) Bronze
Maintenance
The Model N25 ESFR Sprinkler should be inspected and
the sprinkler system maintained in accordance with NFPA
25. Do not clean sprinkler with soap and water, ammo-
nia or any other cleaning fluid. Remove any sprinkler that
has been painted (other than factory applied) or damaged
in any way. A stock of spare sprinklers should be main-
tained to allow quick replacement of damaged or operated
sprinklers. Prior to installation, sprinklers should be main-
tained in the 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 cannot be reassem-
bled and reused. New sprinklers of the same size, type
and temperature rating must be installed. A cabinet of re-
placement sprinklers should be provided for this purpose.
Model N25 ESFR Sprinkler Specification
Sprinklers shall be Early Suppression Fast Response
(ESFR) pendent suppression mode sprinklers specifically
tested and [FM Approved] for commodity storage applica-
tions. Sprinkler frame and deflector to be of bronze con-
struction. Fusible link assembly shall utilize the strut and
lever principle of operation with approved fast response
black-painted or white-painted beryllium-nickel thermal
element. Water seal shall consist of a Teflon-coated Bell-
ville spring washer and brass cap assembly containing no
plastic parts. ESFR sprinklers shall have a nominal K-factor
of 25.2 with 1” NPT threaded end connections. Sprinkler
temperature rating shall be [Ordinary 165°F (74°C)] [Inter-
mediate 212°F (100°C)].
Use only the Model N sprinkler wrench for removal and
installation. Any other type of wrench may damage the
sprinkler.
Note: When handling sprinklers, hold sprinklers only on
frame arms and do not apply any force on the link as-
sembly. Sprinklers should be tightened between 22 - 30
ft-lbs (29.8 - 40.7 Nm) torque. Sprinklers not tightened to
recommended torque may cause leakage or impairment
of the sprinkler. Damage sprinklers must be replaced im-
mediately.
Ordering Information
Specify:
1. Temperature rating
2. Thread type 1” NPT or ISO 7-R1
Fig. 2
Fig. 3 - Model N Wrench
Frame Arm
Link Assembly
Model N wrench