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The Reliable Automatic Sprinkler Co., Inc.,

 103 Fairview Park Drive, Elmsford, New York 10523

Model N252 EC Pendent 

for Control Mode Specific 

Application (CMSA)

Model N252 (SIN RA0842)

Nominal K-Factor = 25.2

An Extended Coverage Sprinkler for 

Storage Applications

Features 

1.  Approved by FM Global for the following storage 

applications: 
Class 1-4, cartoned unexpanded plastic commodities 
under ceilings up to and including 35 ft (10.7 m) high. They 
may be used to protect solid piled, palletized, shelf or bin 
box and open frame rack storage.*

2.  For other storage commodities and storage arrangements, 

see FM Global Data Sheets 8-9.

3. 

Approved for installation per NFPA 13 (2013) . For 
storage commodities, arrangements, and design criteria: 
see NFPA 13 chapter 21.

4.  Eliminates the need for in-rack sprinklers.*
5.  Extended coverage, low pressure, and low flow demand 

provides the opportunity to reduce:
• Labor
•  Piping and fittings
•  Fire pump size
•  Tank size

6.  165 °F (74 °C) and 212 °F (100 °C) temperature ratings.
7.  Maximum deflector distance from ceiling is 13 

1

/

2

” 

(343 mm). 12” (305 mm) to center line of thermal element.

8. 

This is a Quick Response CMSA sprinkler that meets the 
requirements of IFC 2015 for the elimination of smoke/
heat vents in storage occupancies

.

9.  US Pat. No. 7,624,812

Other Patents Pending.

*

 See Design Criteria for details, Tables 1 and 2.

N252 EC Pendent

Listings and Approvals

FM Approved as a storage sprinkler.

Table 1: Design Criteria for FM Class 4 and Cartoned Unexpanded Plastics in Open Frame Racks

Maximum 

Building Height

Feet (m)

Maximum 

Storage Height* 

Feet (m)

Minimum 

Pressure

psi (bar)

Maximum Spacing

Feet (m)

Number 

of Design 

Sprinklers

Hose Stream 

Allowance

gpm (l/min)

Water Supply 

Duration

25 (7.5)

20 (6.0)

25 (1.7)

14 x 14  (4.3 x 4.3)

6

250 (950)

1 Hour

30 (9.1)

25 (7.6)

30 (2.1)

14 x 14  (4.3 x 4.3)

6

250 (950)

1 Hour

35 (10.7)

30 (9.1)

40 (2.8)

12 x 12  (3.6 x 3.6)

8

250 (950)

1 Hour

*  Storage must be a minimum of 3’ (0.9 m) below the deflector

Multilingual document:  

Select your language below

Bulletin 908 Rev. E_Multilingual

Bulletin 908 Rev. E_Multilingual

Содержание N252 EC Pendent

Страница 1: ... Fire pump size Tank size 6 165 F 74 C and 212 F 100 C temperature ratings 7 Maximum deflector distance from ceiling is 131 2 343 mm 12 305 mm to center line of thermal element 8 This is a Quick Response CMSA sprinkler that meets the requirements of IFC 2015 for the elimination of smoke heat vents in storage occupancies 9 US Pat No 7 624 812 Other Patents Pending See Design Criteria for details Ta...

Страница 2: ...sprinkler systems or pre action sprinkler systems whose sprinkler protection design can be based on the equivalent of a wet pipe system are acceptable 4 Sprinkler Spacing The minimum and maximum linear distances between sprinklers are 10 ft 3 1 m and 14 ft 4 2 m respectively for ceiling heights up to and including 30 ft 9 0 m For ceiling heights over 30 ft 9 0 m and up to 35 ft 10 7 m the maximum ...

Страница 3: ...lers not tightened to recommended torque may cause leakage or impairment of the sprinklers Damaged sprinklers must be replaced immediately Maintenance The Model N252 EC Pendent Control Mode Specific Application Sprinklers should be inspected and the sprinkler system maintained in accordance with NFPA 25 and local jurisdictional requirements Do not clean sprinklers with soap and water ammonia or an...

Страница 4: ...anded Plastics Cartoned Expanded Plastics Uncartoned Unexpanded Plastics Uncartoned Expanded Plastics 10 3 0 N A N A 6 20 1 4 10 7 0 5 See Note 4 10 7 0 5 See Note 4 15 4 5 N A 6 20 1 4 6 20 1 4 12 7 0 5 See Note 4 8 20 1 4 See Note 4 20 6 0 6 20 1 4 6 20 1 4 6 20 1 4 8 20 1 4 See Note 4 8 40 2 8 See Note 4 25 7 5 6 20 1 4 6 20 1 4 6 20 1 4 8 40 2 8 See Note 4 12 40 2 8 See Note 4 30 9 0 6 25 1 7 ...

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