Design Requirements — Light Hazard Extended Coverage Applications
Density .1 GPM/ft
2
- NFPA 13 All Editions
Design
Data
All Central Model ELO LH Re-
cessed Pendent and Pendent Auto-
matic Sprinklers must be installed
according to the current NFPA 13
Standard and these installation
instructions. Deviations from these
requirements and standards or any
alteration to the sprinkler itself will
void any warranty made by Central
Sprinkler Company. In addition,
installation must also meet local
government provisions, codes, and
standards as applicable.
The system piping must be properly
sized to ensure the minimum required
flow rate at the sprinkler. Check for
the proper model, style, orifice size,
and temperature rating prior to
installation. Install sprinklers after the
piping is in place to avoid mechanical
damage; replace any damaged units.
Wet pipe systems must be
protected from freezing.
Upon completion of the installation,
the system must be tested per
recognized standards.
The Model ELO LH incorporates the latest in heat-responsive glass bulb
technology. The operating mechanism consists of a 3 mm (76.2 mm)
liquid-filled frangible capsule that is only 20 mm in length.
Operation: The glass bulb capsule operating mechanism contains a
heat-sensitive liquid that expands upon application of heat. At the rated
temperature, the frangible capsule ruptures, thereby releasing the orifice
seal. The sprinkler then discharges water in a pre-designed spray pattern
to control the fire.
In the event of a thread leak,
remove the unit, apply new pipe joint
compound or tape, and reinstall.
Installation Sequence
Step 1. For Pendent and Recessed
Pendent sprinklers, the face of the
sprinkler fitting should be installed a
nominal
3
⁄
4
" (
±
3
⁄
8
") (20 mm (
±
9.5 mm))
behind the ceiling line. Adjustments
are made via the push-on escutcheon.
Step 2. Use only a non-hardening
pipe joint compound or Teflon* tape.
Apply only to the male threads.
Step 3. Hand tighten the sprinkler into
the fitting. Use a Central Sprinkler
Wrench, to tighten the unit into the
fitting. A leak-tight joint requires only
7 to 14 ft.-lbs. (9.5 to 19.0 Nm) of
torque; a tangential force of 14 to 28
lbs. (62.3 to 124.5 N) delivered through
a 6" (150 mm) handle will deliver
adequate torque. Torque levels over
21 ft.-lbs. (28.6 Nm) may distort the
orifice seal, resulting in leakage.
Installation
Care &
Maintenance
Sprinklers must be handled care-
fully. They must not be transported
or stored where ambient temperature
may exceed 100
°
F/38
°
C. For best
results, store them in a dry, cool loca-
tion in the original shipping package.
Do not install sprinklers that have
been dropped or visibly damaged.
Sprinklers must never be painted,
coated, plated, or altered in any other
way from manufactured condition or
they may not function properly. Any
sprinklers altered in such manner
must be replaced.
The owner is responsible for the
proper operating condition of all fire
protection devices and accessories.
The NFPA standard 25 entitled,
“Inspection, Testing and Maintenance
of Water-Based Fire Protection
Systems”, contains guidelines and
minimum maintenance requirements.
Furthermore, the local
Authority
Having Jurisdiction may have addi-
tional regulations and requirements
for maintenance, testing, and inspec-
tion that must be obeyed.
It is advisable to have sprinkler
systems inspected regularly by a
qualified inspection service. Length of
time between such inspections can
vary due to accessibility, ambient
atmosphere, water supply, and site
activity.
Do not attempt to reassemble or
otherwise reuse a sprinkler that has
operated. Replace any sprinkler
Caution: Minimum spacing between pendent and recessed
pendent sprinklers is 11'-0" (3.3 m).
*Teflon is a trademark of the DuPont Corp.
Spacing
Flow/Pressure
Pendent Sensitivity
Recessed PendentSensitivity
135
°
F
155
°
F, 200
°
F, & 250
°
F
135
°
F
155
°
F, 200
°
F, 250
°
F
(57
°
C)
(68
°
C), (93
°
C), & (121
°
C)
(57
°
C)
(68
°
C), (93
°
C), & (121
°
C)
16' X 16'
30.2 gpm/7.0 psi
QR
QR
QR*
QR
(4.9 x 4.9)
(114.5 Lpm / 0.5 bar)
18’x18'
33 gpm/8.4 psi
QR
QR
QR*
STD
(5.5 x 5.5)
(125.1 Lpm / 0.6 bar)
20’x20'
40.0 gpm/12.3 psi
QR
STD
QR*
STD
(6.1 x 6.1)
(151.6 Lpm / 0.8 bar)
* Use ELO vented support cup assembly, Part #4111 Brass, #4110 Chrome, #4112 White
OBSOLETE
