3
*Teflon is a trademark of the DuPont Corp.
Design
Data
Installation
All Central Model C-1A Sprinklers
must be installed according to current
NFPA 13 Standards and these
installation instructions. Deviations
from these requirements and stan-
dards 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. Refer to the
Installation section of Central
Bulletins on the Model A-1 Dry
Pendent Sprinklers for use in dry pipe
sprinkler installations.
Upon completion of the installation,
the system must be tested per
recognized standards.
In the event of a thread leak,
remove the unit, apply new pipe joint
compound or tape, and reinstall.
Installation Sequence
Step 1. The unit must be installed in
the pendent position.
Step 2. The face of the sprinkler
fitting should be installed a nominal
11/8" ±7⁄16" (28.6 mm ±11.1 mm) behind
the ceiling line as shown in the
installationdiagramonpagetwo.
Adjustments may be made via the
push-on escutcheon plate to comp-
ensate for variations in the fitting.
Do not use the push-on escutcheon
plate to hold the unit in position. The
sprinkler will function properly only
when the system piping is anchored to
the building structure. Otherwise
reaction forces from system initiation
could alter the sprinkler alignment and
disrupt the pattern.
Step 3. Use only a non-hardening
pipe joint compound or Teflon* tape.
Apply only to the male threads.
Step 4. Hand tighten the sprinkler into
the fitting. Leaving the protector cap in
place, Use a Central Sprinkler Omega
Model A 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. (16.3 to 124.5 Newtons)
delivered through a 6" (150 mm) handle
willdeliveradequatetorque. Torque
levels over 21 ft.-lbs. (28.6 Nm) may
distort the orifice seal, resulting in
leakage.
Step 5. Leave the protector cap in
place until the installation is finished.
When the system is ready for service,
remove the cap.
Step 6. To install the escutcheon
plate, align it with and press it over the
sprinkler body until the outer edge of
the escutcheon meets the mounting
surface.
CAUTION: Special care must be taken
when installing with a CPVC system.
Sprinklers must be installed after the
CPVC manufacturer's recommended
setting time for the primer and cement
to ensure that neither accumulate
within the sprinkler.
Special care must be taken when
installing with a copper system.
Sprinklers must be installed only after
the inside of the sprinkler drop and
associated fittings have been wire
brushed to remove any flux. Residual
flux can cause corrosion and in
extreme cases can impair proper
sprinkler operation.
Care &
Maintenance
Sprinklers must be handled care-
fully. They must not be transported
or stored where ambient temperature
mayexceed100oF/38oCfor145°F/
63oCor160oF/71oCsprinklers. For
200oF/93oCratedsprinklers,the
ambient temperature should not
exceed 150oF/66oC. For best results,
store them in a dry, cool location 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 a 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 re-assemble or
otherwise reuse a sprinkler that has
operated. Replace any sprinkler
exhibiting corrosion or damage;
Design Requirements — Quick Response Commercial Applications
In Quick Response Commercial applications, the Omega C-1A sprinklers are
intended for standard area coverages and standard flow and pressure require-
ments as specified in current NFPA 13 and NFPA 13R Standards.
