Tyco Fire Product CENTRAL A Instruction Manual

CENTRAL
Model A
Intermediate Level
5.6 & 8.0 K-factor
Standard Response
Upright & Pendent Pendent Fusible Solder Type Automatic Sprinkler
Tyco Fire Products --- www.centralsprinkler.com
451 North Cannon Avenue, Lansdale, Pennsylvania 19446 --- USA
Customer Service/Sales: Tel: (215) 362-0700 / Fax: (215) 362-5385
Technical Services: Tel: (800) 381-9312 / Fax: (800) 791-5500
General
Description
The Central Model A, 5.6 & 8.0 K-factor
Upright & Pendent Intermediate Level
Automatic Sprinklers are designed for use
in sprinkler systems having sprinklers at
multiple elevations in the same area.
Intermediate Level Sprinklers are primarily
designed for use in rack storage sprinkler
systems, where their thermally sensitive
elements must be shielded from the water
spray of higher elevation sprinklers which
could operate earlier during a fire.
Intermediate Level Sprinklers are also
used in applications such as beneath
open gridded catwalks.
Both the upright and pendent versions
come complete with the water sheild
affixed to the sprinkler. The pendent
version can also be created using a
pendent Model A Standard Spray
Sprinkler and a separate water sheild
(WS-2) that is threaded on the 1/2" or 3/4"
NPT of the sprinkler prior to installing the
sprinkler into the fitting.
If there is a possibility that the Intermediate
Level Sprinklers may be exposed to
mechanical damage, a head guard and/or
water sheild assembly (G-2 or WSG-2)
can be added to the Model A Standard
Spray Sprinker, creating an Intermediate
Level Sprinkler.
These sprinklers are available with wax
and lead coatings that may be utilized to
extend the life of copper alloy sprinklers
beyond that which would otherwise be
obtained when exposed to corrosive
atmospheres.
Although wax and lead coated sprinklers
have passed the standard corrosion tests
of the applicable approval agencies, the
testing is not representative of all possible
corrosive atmospheres. Consequently, it is
recommended that the end user be
consulted with respect to the suitability of
these corrosion resistant coatings for any
given corrosive environment. The effects
of ambient temperature, concentration of
chemicals, and gas/chemical velocity,
should be considered, as a minimum,
along with the corrosive nature of the
A
chemical to which the sprinklers will be
exposed.
Operation: A fusible alloy is sealed into a
bronze actuating rod (center strut) by a
stainless steel ball. When the alloy melts
at its rated temperature, the ball is forced
upward into the center strut, releasing the
two ejectors and operating the sprinkler.
WARNING
The Model A Intermediate Level Sprinklers
described herein must be installed and
maintained in compliance with this
document, as well as with the applicable
standards of the National Fire Protection
Association, in addition to the standards of
any other authorities having jurisdiction.
Failure to do so may impair the integrity of
these devices.
The owner is responsible for maintaining
their fire protection system and devices in
proper operating condition. The installing
contractor or sprinkler manufacturer
should be contacted relative to any
questions.
Technical
Data
Sprinkler Identification Number
SIN C3113 - A Int. Level UP (K=5.6)
SIN C3211 - A Pend (K=5.6)*
SIN C3111 - A UP (K=5.6)*
SIN C4113 - A Int. Level UP (K=8.0)
SIN C4211 - A Pend (K=8.0)*
SIN C4111 - A UP (K=8.0)*
SIN C4813 - A Int. Level UP (K=8.0, 1/2")
SIN C4911 - A Pend (K=8.0, 1/2")*
SIN C4811 - A UP (K=8.0, 1/2")*
*add Head Guard and/or Shield
Approvals
UL & ULC Listed. FM & NYC Approved
(Refer to Table 1 - 2. The approvals apply
only to the service conditions indicated in
the Design Criteria Section)
Maximum Working Pressure
175 psi (12,1 bar)
250 psi (17,3 bar) UL & ULC (K=5.6)
Pipe Thread Connection
1/2 inch NPT -(K=5.6 & K=8.0)
3/4 inch NPT - (K=8.0)
2-01
Intermediate
Level Automatic
Sprinklers
Discharge Coefficient
1/2
K = 5.6 GPM/psi (80,6 LPM/bar
1/2
K = 8.0 GPM/psi (116,8 LPM/bar
Temperature Ratings
165°F/74°C, 212°F/100°C, 286°F/141°C
Finishes
Sprinkler: Chrome Plated, or Natural
Brass
Head Guard/Shield: Red or Chrome
Corrosion Resistant Coatings
Sprinkler: Wax, Lead & Wax-over-Lead
Physical Characteristics
The Model A Intermediate Level Sprin-
klers utilize a dezincification resistant
(DZR) bronze frame and a brass deflector.
The waterway is sealed with copper seal
disk, and the fusible assembly is con-
structed of bronze and stainless steel
components.
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1/2
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No. 3-12.0