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The Model GB and GB-QR Dry Sidewall Sprinklers are intended for standard
area coverages and standard flow and pressure requirements as specified in
current NFPA 13 Standards.
Design
Data
Design Requirements—Standard Applications
All Model GB and GB-QR Dry
Sidewall Automatic Sprinklers must
be installed according to current
NFPA 13 Standards. 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.
Dry sprinklers are designed to
prevent water from accumulating in
drops to sprinklers. To accomplish
this, they have a fitting that protrudes
into the branch line that allows the
plug to sit above the water line, if
there is any residual water, and
operate without the potential of
freezing. Always install dry sprinklers
in a threaded tee.
For standard applications the
system piping may be hydraulically
calculated or pipe-scheduled. 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.
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
into a threaded, cast iron, ductile
Installation
iron, or malleable iron tee only. It
may be installed into the run or
outlet of this tee. Do not install
into an elbow or mechanical tee.
Step 2. Use only a non-hardening
pipe joint compound or Teflon* tape.
Apply only to the male threads.
*Teflon is a trademark of the DuPont Corp.
Step 3. Hand tighten the dry sidewall
assembly into the fitting. Use the
appropriate Central Sprinkler dry
pendent wrench to tighten the unit in
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. The Model
GB dry sidewall can be installed by
using the correct wrench on either the
sprinkler wrench boss or the barrel of
the dry sidewall.
Step 4. To install the escutcheon
plate, align it with and push it over the
sprinkler body and into the upper
support piece until the outer edge of
the escutcheon meets the mounting
surface. The recessed escutcheon
tool may be used to install the
escutcheon plate easily from the floor.
Do not over- or under-tighten the
sprinkler to compensate for inaccu-
rate escutcheon plate adjustment.
Caution: If installing in a CPVC
system, appropriate adaptation must
be made to insure that the dry
pendent is being installed into a
threaded, cast iron, ductile iron, or
malleable iron tee only. Special care
must be taken when installing with a
CPVC system. Sprinklers must be
installed after the manufacturer's
recommended setting time for the
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
location in the original shipping
package.
Do not install sprinklers that have
been dropped or visibly damaged,
such as a crack in a glass bulb or a
loss of liquid from the bulb. Sprinklers
should 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.
Care &
Maintenance
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.
OBSOLETE
