Tyco Fire Product Star Stealth S112 Instruction Manual

Standard Response
Concealed Pendent Sprinklers
Stealth™ S112, K=5.6, 1/2" NPT

GENERAL DESCRIPTION

The Star Stealth S112, 5.6 K-Factor, Standard Response,
Concealed Pendent Sprinklers are decorative sprinklers
featuring a flat cover plate designed to conceal the sprin-
kler. It is the best choice for architecturally sensitive ar-
eas such as hotel lobbies, office buildings, churches, and
restaurants.
Each unit includes a Cover Plate Assembly which con-
ceals the sprinkler operating components above the ceil-
ing. Each sprinkler is shipped with a Protective Cap
which permits temporary fire protection while the ceiling
Installation is being completed.
The separable two-piece design of the Cover Plate and
Mounting Cup Assemblies allows installation of the sprin-
klers and pressure testing of the fire protection system
prior to installation of a suspended ceiling or application
of the finish coating to a fixed ceiling. They also permit re-
moval of suspended ceiling panels for access to building
service equipment without having to first shut down the
fire protection system and remove sprinklers.
Also, the separable two-piece design of the the Sprinkler
provides for 1/2 inch (12,7 mm) of vertical adjustment, to
reduce the accuracy to which the length of fixed pipe
drops to the sprinklers must be cut.

WARNINGS

The Stealth S112 Standard Response Concealed Pen-
dent Sprinklers described herein must be installed and
maintained in compliance with this document, as well as
with the applicable standards of the National Fire Protec-
tion Association, in addition to the standards of any other
authorities having jurisdiction. Failure to do so may impair
the integrity of these devices.
The Stealth S112 must not be used in applications where
the air pressure above the ceiling is greater than that be-
low. Downdrafts through the Mounting Cup could delay
sprinkler operation in a fire situation.
The owner is responsible for maintaining their fire protec-
tion system and devices in proper operating condition.
The installing contractor or sprinkler manufacturer should
be contacted relative to any questions.
TYCO FIRE PRODUCTS
Customer Service/Sales: Tel: (800) 558-5236 • Fax: (414) 570-5010
Technical Services: Tel: (800) 381-9312 • Fax: (800) 791-5500
SIN S3100

OPERATION

When exposed to heat from a fire, the Cover Plate, which
is normally soldered to the Enclosure at three points, falls
away to expose the Sprinkler Assembly. At this point the
Deflector supported by the Arms drops down to its opera-
tional position.
The glass bulb contains a fluid which expands when ex-
posed to heat. When the rated temperature is reached,
the fluid expands sufficiently to shatter the glass bulb,
which then allows the sprinkler to activate and water to
flow.
Table A provides the combinations of sprinkler (glass
bulb) temperature ratings and cover plate (solder) tem-
perature ratings, as well as maximum permitted ceiling
temperatures.

TECHNICAL DATA

Approvals
UL and C-UL Listed. FM Approved and LPC Approved.
NYC Accepted under MEA 212-98-E.
(The approvals apply only to the service conditions indi-
cated in the Design Criteria section.)
Maximum Working Pressure
175 psi (12,1 bar)
Discharge Coefficient
1/2
K = 5.6 GPM/psi (80,6 LPM/bar
Temperature Ratings
135°F/57°C, 155°F/68°C, 175°F/79°C, or 200°F/93°C
Adjustment
1/2 inch (12,7 mm)
Finishes
Cover Plate: Brushed Chrome or White Painted
(Custom paint matches and colors other than white are
available on request.)
Physical Characteristics (Ref. Figure 1)
The Stealth S112 utilizes a 4 mm bulb and a bronze
frame. The two-piece button assembly is brass and cop-
per, and the gasketed spring plate consists of a beryllium
nickel disc spring that is sealed on both its inside and out-
side edges with a Teflon V gasket. The compression screw,
1/2
)
1-1.1.12
3-01