3
008FG01C
Fig. 1 – Model N252 EC Pendent
FM Data Sheet 2-0, Ceiling to center of thermal element:
Maximum 12”
Fig. 2 – Model N Wrench
FRAME ARM
LINK ASSEMBLY
MODEL N WRENCH
Technical Data
Sprinkler
Model
Type
Temperature
Rating
Maximum
Ambient
Ceiling Temp.
Nominal
K-Factor
gpm/psi
1
/
2
(l/min.bar
-0.5
)
Orifice
Size
Thread
Size
Sprinkler Ht.
inch (mm)
Sprinkler
Identification
Number (SIN)
°F
°C
°F
°C
N252 EC
Pendent
165
74
100
38
25.2 (363)
1”
1” NPT (R1)
3.6 (91.5)
RA0842
212
100
150
66
Installation
Model N252 sprinklers are to be installed as shown. When
handling sprinklers, hold sprinklers only on frame arms and do
not apply any force on the link assembly. For installing Model
N252 EC pendent sprinklers use only the Model N wrench (ref.
Fig. 2). The N1 wrench may also be utilized in all non-recessed
installations (Fig. 3). Use of wrenches other than that specified
may damage these sprinklers. Sprinklers should be tightened
between 22 to 30 ft-lb (29.8 - 40.7 N-m) torque. Sprinklers
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 any other cleaning fluids or solvents.
Remove dust by using a soft brush or gentle vacuuming. Remove
any sprinkler that has been painted (other than factory-applied)
or otherwise altered after leaving the factory. 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 the original cartons and packaging
until used to minimize the potential for damage to sprinkler that
would cause improper operation or non-operation.
CEILING OR UNDERSIDE OF ROOF DECK
≤
12”
[304.80 mm]
1.85” [47.0 mm]
Fig. 3 – Model N1 Wrench
Use only the Model N (Fig. 2) or N1
(Fig. 3) wrenches for installation and
removal of the sprinkler. Any other
type of wrench may damage the
sprinkler.
