Tyco Fire Product CENTRAL A Instruction Manual

CENTRAL
Model A Recessed
2.8, 4.2 & 8.0 K-factor
Standard Response
Standard Coverage
Recessed Pendent Fusible Solder Type 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 Standard Re-
sponse Recessed Pendent Sprinklers
are automatic sprinklers of the fusible
solder type. They are standard response
- standard orifice spray sprinklers
intended for use in fire sprinkler
systems designed in accordance with
the standard installation rules recog-
nized by the applicable Listing or
Approval agency (e.g., UL Listing is
based on NFPA 13 requirements).
The Central Model A Recessed
Pendent Sprinklers incorporate a
center strut mechanism with a special
two-piece recessed escutcheon
assembly permitting 1/2" of field-
adjustment. Unlike most other
recessed sprinklers, the upper
escutcheon support piece is factory
installed on the base of the sprinkler
frame, assuring a Listed installation.
The ceiling escutcheon plate is easily
installed after the sprinkler is in place
either by the standard "push-on"
escutcheon or the special "thread-on"
escutcheon. This feature allows
removal of ceiling panels for easy
access to ceiling equipment without
taking the system out of service to
remove the sprinkler.
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 Upright & Pendent Sprin-
klers 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.
A
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 C1711 - A (K=2.8)
SIN C2711 - A (K=4.2)
SIN C4711 - A (K=8.0)
SIN C4011 - A (K=8.0, 1/2" NPT)
Approvals
UL & ULC Listed. NYC Approved
(Refer to Table 1-3. The approvals
apply only to the service conditions
indicated in the Design Criteria Section)
Maximum Working Pressure
175 psi (12,1 bar)
Pipe Thread Connection
1/2 inch NPT -(K=2.7, 4.2 & 8.0)
3/4 inch NPT - (K=8.0)
Discharge Coefficient
K = 2.8 GPM/psi 1/2 (40,3 LPM/bar
K = 4.2 GPM/psi 1/2 (60,5 LPM/bar
K = 8.0 GPM/psi 1/2 (116,8 LPM/bar
Temperature Ratings
165°F/74°C or 212°F/100°C
Finishes
Sprinkler: White Polyester, Chrome
Plated, or Natural Brass
Recessed Escutcheon: White Coated,
Chrome Plated, or Brass Plated
Physical Characteristics
The Model A Recessed Pendent 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. The support cup is steel.
Standard Spray
Recessed
Pendent
Sprinklers
1/2 )
1/2 )
1/2 )
2-01
No. 1-2.0