TFP540
Page 7 of 8
Clearance Space
In accordance with NFPA 13, when
connecting an area subject to freez-
ing and an area containing a wet pipe
sprinkler system, the clearance space
around the sprinkler barrel of Dry-Type
Sprinklers must be sealed. Due to
temperature differences between two
areas, the potential for the formation of
condensation in the sprinkler and sub-
sequent ice build-up is increased. If
this condensation is not controlled, ice
build-up can occur that might damage
the dry-type sprinkler and/or prevent
proper operation in a fire situation.
Use of the Model DSB-2 Dry Sprin-
kler Boot, described in Technical Data
Sheet TFP591 and shown in Figure 11,
can provide the recommended seal.
Installation
TYCO Series DS-2 Dry-Type Sprin-
klers, 11.2K Pendent, Extended Cover-
age, Light and Ordinary Hazard must
be installed in accordance with this
section.
General Instructions
Series DS-2 Dry-Type Sprinklers must
only be installed in fittings that meet
the requirements of the Design Cri-
teria section. See the Design Criteria
section for other important require-
ments regarding piping design and
sealing of the clearance space around
the Sprinkler Casing. With reference
to Figure 7, do not grasp the sprinkler
by the deflector. Failure to follow this
instruction may impair performance of
the device.
Do not install any bulb-type sprinkler
if the bulb is cracked or there is a loss
of liquid from the bulb. With the sprin-
kler held horizontally, a small air bubble
should be present. The diameter of the
air bubble is approximately 1/16 in.
(1,6 mm) for the 135°F (57°C) rating to
1/8 in. (3,2 mm) for the 360°F (182°C)
rating.
A leak-tight 1 in. NPT sprinkler joint
should be obtained by applying a min-
imum-to-maximum torque of 20 to
30 lb-ft (26,8 to 40,2 N·m). Higher
levels of torque may distort the sprin-
kler Inlet with consequent leakage or
impairment of the sprinkler.
Do not attempt to compensate for
insufficient adjustment in an Escutch-
eon Plate by under or over-tightening
the Sprinkler. Re-adjust the position of
the sprinkler fitting to suit.
Note:
Install pendent sprinklers only in
the pendent position. The deflector of a
pendent sprinkler must be parallel to the
ceiling.
Step 1.
With a non-hardening pipe-
thread sealant such as TEFLON applied
to the Inlet threads, hand-tighten the
sprinkler into the sprinkler fitting. Do
not grasp the sprinkler by the deflec-
tor, see Figure 7.
Step 2.
Wrench-tighten the sprinkler
using either:
• a pipe wrench on the Inlet Band or
the Casing, see Figure 1
• a W-Type 17 Sprinkler Wrench on
the wrench flat (see Figure 6); apply
the wrench recess of the W-Type 17
Sprinkler Wrench to the wrench flat
Note:
If sprinkler removal becomes
necessary, remove the sprinkler using the
same wrenching method noted above.
Sprinkler removal is easier when a non-
hardening sealant was used and torque
guidelines were followed. After removal,
inspect the sprinkler for damage.
Step 3.
After installing the ceiling and
applying a ceiling finish, slide on the
outer piece of the Escutcheon until
it comes in contact with the ceiling.
Do not lift the ceiling panel out of its
normal position.
When using the Deep Escutcheon,
hold the outer piece in contact with the
mounting surface (ceiling or wall). Then
rotate the inner piece approximately 1/4
turn with respect to the outer piece,
to hold the Deep Escutcheon firmly
together.
Care and
Maintenance
TYCO Series DS-2 Dry-Type Sprinklers,
11.2K Pendent, Extended Coverage,
Light and Ordinary Hazard must be
maintained and serviced in accordance
with this section.
Before closing a fire protection system
main control valve for maintenance
work on the fire protection system
that it controls, obtain permission to
shut down the affected fire protection
systems from the proper authorities
and notify all personnel who may be
affected by this action.
Absence of the outer piece of an
escutcheon, which is used to cover a
clearance hole, may delay the time to
sprinkler operation in a fire situation.
A Vent Hole is provided in the Bulb
Seat (see Figure 1) to indicate if the Dry
Sprinkler is remaining dry. Evidence of
leakage from the Vent Hole indicates
potential leakage past the Inlet seal
and the need to remove the sprinkler
to determine the cause of leakage,
for example, an improper installation
or an ice plug. Close the fire protec-
tion system control valve and drain the
system before removing the sprinkler.
Sprinklers which are found to be
leaking or exhibiting visible signs of
corrosion must be replaced.
Automatic sprinklers must never be
painted, plated, coated, or other-
wise altered after leaving the factory.
Modified sprinklers must be replaced.
Sprinklers that have been exposed to
corrosive products of combustion, but
have not operated, should be replaced
if they cannot be completely cleaned
by wiping the sprinkler with a cloth or
by brushing it with a soft bristle brush.
Care must be exercised to avoid
damage to the sprinklers before,
during, and after installation. Sprin-
klers damaged by dropping, striking,
wrench twist/slippage, or the like, must
be replaced. Also, replace any sprinkler
that has a cracked bulb or that has lost
liquid from its bulb, see the Installation
Section.
The owner is responsible for the inspec-
tion, testing, and maintenance of their
fire protection system and devices in
compliance with this document, as well
as with the applicable standards of the
NATIONAL FIRE PROTECTION ASSO-
CIATION, such as NFPA 25, in addition
to the standards of any other authorities
having jurisdiction. Contact the install-
ing contractor or product manufacturer
with any questions.
Automatic sprinkler systems are rec-
ommended to be inspected, tested,
and maintained by a qualified Inspec-
tion Service in accordance with local
requirements and/or national codes.
