CENTRAL ULTRA K-25 ESFR User manual

OBSOLETE
C:ENTR ULTRA™ K-25™ 1-99
ULTRA™ K-25™ ESFR
Lo\N Pressure
Early Suppression Fast Response
Manufactured by: Central Sprinkler Company
451 North Cannon Avenue, Lansdale. Pennsylvania 19446
Product
Description
The Central ULTRA™K-25,.,,Early
Suppression Fast Response (ESFR)
Automatic Sprinkler has been de-
signed to meet high challenge fire
hazards while eliminating the high
pressure requirements of K-i4 ESFR's
and the need for in-rack sprinklers.
The Model ULTRA'"K-25n' uses a
larger orifice than other ESFR sprink-
lers which allows the reduction of the
required pressure The pressure re-
quired varies by building and storage
height. Refer to the required pressure
chart for specific requirements.
The ULTRA™K-25™has several ad-
vantages over 14 K-Factor ESFR's.
The main advantage Isin the lower
required pressure. This reduction, up
to 60% in some cases, can have a
dramatic effect on the sprinkler system.
Itcan eliminate the need for a pump
and all of the associated pump ex-
pense, such as additional electrical
service to the building. The maximum
deflector distance Is 18" (457 2 mm)
compared to 14" (355.6 mm) as is the
case for 14 K-factor ESFA's, and the
reduction in pressure can make instal-
lation more cost effective with smaller
easier to install pipe. Another main
advantage is that the ULTAN"' K-2S™
is for buildings up to 45'-0"(13.7m) high
with 40'-0"r12.2mJof storage without
the need for in-rack sprinklers. 14
K-Factor ESFA's require in-rack sprin-
klers discharging at 50 psi in this situa-
tion. Eliminating in-rack sprinklers in
situations where 14 K-Factor ESFA's
can not, shows the outstanding perfor-
mance of the ULTRA"• K-25"''
The Model ULTRA',..K-25™utilizes a
160°F/ 71°C or a 200°F/ 93°C Fast
Response element, giving the sprinkler
the required fast response characteris-
tics. The fast response, combined
with water droplet size and velocity
provide early suppression to high
challenge fires.
Operation: The ULTRA™K-25™uti-
lizes a heat sensitive three fin operat-
ing element. It does not use an o-ring
in any part of the design. The element
operates when heat Is absorbed by
the heat fins and conducted to the
alloy pellet. At the rated temperature
the alloy pellet melts, causing the ball
plunger to drop, freeing balls from the
retaining groove. This releases the
heat fin/ washer assembly and allows
the arms to eject and the water to
flow from the open orifice.
-ATTENTION -
ULTRA™ K-25™ ESFR'S
have a 1" (25 mm)
thread. Be sure to list/
order the correct outlet
on the branchline.
Early
Suppression
Fast
Response
Automatic
Sprinkler
~ Technical
ill~Data
Model: ULTAN ..K-25r"
Style: Pendent
Orifice Size: .930 (23.6 mm)
K-Factor: 25.2 (360.5 metric)
Thread Size: 1" N.P.T (25 mm)
Temperature Rating: 160°F/ 71°c
200°F/ 93°C
Sensitivity: Quick Response
Approvals: FM
Maximum Working Pressure:
175 psi (12.1 bar)
Factory Hydro Test:100% at
500 psi (34.5 bar)
Standard Finish: Brass
Length: 4 1/a''(105 mm)
Width: 2 13
/,5" (71 .4 mm)
Weight: 11 oz. (313 g)
Patents: Patents are pending.
No. 3•1.0

OBSOLETE
ULTRATMK-25™
Early Suppression Fast Response Pendent Sprinkler
CENTRAL
213/16" ---~
(71.4 mm)
3 9/16"
(90.5 mm)
1 5/8"
(41.3 mm)
Note: For pro1ects reqwrtng Factory Mutual Guidelines. consult the Factory Mutual Loss Prevenllon Data Sheets. Requtrements may
differ from NFPA gurdelines.
Required Pressure
ULTRA'" K-251" ESFR
Max. Bldg. Height Max. Storage Height PSI Required
30' (9.1m) 25' (7.6m) 20 psi* (1.4 bar) 1,2,3.4
35' (10.7m) 30' (9.1m) 30 psi* (2.1bar)
40' (12.2m) 35' (10.7m) 40 psi* (2.8 bar) 1,2.3
45' {13.7m) 40' (12.2m) 50 psi.. (3.4 bar) 1
• No in-rack sprinklers are required for any Ultra K-25"' application.
••K-14 ESFRs require 1 level ol in-rack sprinklers wllh a demand of 50 psi (3.4 bar).
1 • Heavy Weight roll paper - (For 40' & 45' Buildings. Max. Storage Height is 30') (seeFM 8·21)
2 • Plastic Coated Heavy Weight roll paper - (Max. Storage Height Is 20') (see FM8-21)
3 - Medium Weight roll paper - (Max. Storage Hetght 1s20') (see FM8·21)
4 • Rubber Tire storage (see FM 8-3)
2
K-14 ESFR
PSI Required
50 psi (3.4 bar)
75 psi (5.2 bar)
75 psi (5.2 bar)
90 psi** (6.2 bar)

OBSOLETE
Design
Data
Design Requirements -Applications
The design and installation of ULTRA™K-25™ ESFR sprinkler systems must
comply with the applicable standards of NFPA, the Authority Having Jurisdic-
tion, Factory Mutual's Loss Prevention Data Sheets, and the information pro-
vided in this data sheet.
Commodity: • Cartoned unexpanded plastic: and class 1,11,111,orIV commodi-
ties, encapsulated or unencapsulated.
• Heavy Weight , Plastic Coated Heavy Weight, & Medium
Weight roll paper -- banded or unbanded rolls in open, standard
or closed array as outlined in FM 8-21.
• Rubber nre as outlined in FM 8-3.
Minimum Pressure: Follow the chart on page 2.
Minimum Flow: Use 25.2 as the K-Factor and the pressure according to the
chart on page 2 with standard hydraulic calculation procedures.
Maximum deflector distance· 18" (457.2 mm).
In-rack sprinklers: Not required for any building height or storage height.
All other design guidelines are the same for all ESFR sprinklers and can be
found in the NFPA Standards and FM Loss Prevention Data Sheets.
~ Installation
All Central Model ULTRA™K-25™
Automatic Sprinklers must be installed
according to current NFPA Standards
and these installation instructions.
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.
The system piping must be properly
sized by hydraulic calculation to ensure
the minimum required pressure at the
sprinkler. Install sprinklers after the
piping is in place to avoid mechanical
damage; replace any damaged units.
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.
'Teflon 1sa trademark of the DuPont Corp.
Installation Sequence
Step 1. Use only a non-hardening
pipe joint compound or Teflon* tape.
Apply only to the male threads.
Step 2. Hand tighten the sprinkler
into the fitting. Use wrench to tighten
the unit into 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 14to 28 lbs. (62.3 to 124.6 N)
delivered through a 6" (150 mm)
handle will deliver adequate torque.
Torque levels over 21 ft.-lbs. (28.6
Nm) may distort the orifice seal,
resulting in leakage.
ITTTJICare&
l-.jl Maintenance
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 loca-
tion in the original shipping package.
Do not install sprinklers that have
3
been dropped or visibly damaged.
Sprinklers should never be painted,
coated, plated, or altered in any
other way from manufactured condi-
tion or they may not function prop-
erly. Any sprinklers altered in such
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 Sys-
tem", contains guidelines and mini-
mum maintenance requirements.
Furthermore, the local Authority Hav-
ing Jurisdiction may have additional
regulations and requirements for
maintenance, testing, and inspection
that must be obeyed.
It is advisable to have sprinkler sys-
tems inspected regularly by a qualified
inspection service. Length of time be-
tween such inspections can vary due
to accessibility, ambient atmosphere,
water supply, and site activity.
Do not attempt to re-assemble or
otherwise reuse a sprinkler that has
operated. Replace any sprinkler ex-
hibiting corrosion or damage; always
use new sprinklers of the same type
and temperature rating as replace-
ments.
Because the discharge pattern is
critical to protection of life and prop-
erty, nothing should be hung or at-
tached to the sprinkler unit that would
disrupt the pattern. Such obstructions
must be removed. In the event that
construction has altered the original
configuration, additional sprinklers
should be installed to maintain the
protection level
Do not attempt to replace sprinklers
without first removing the fire protec-
tion system from service. Be certain
to secure permission from all Authori-
ties Having Jurisdiction, and notify all
personnel who may be affected dur-
ing system shutdown. A fire watch
during maintenance periods is a wise
precaution.
To remove the system from service
mode, first refer to the system oper-
ating guide and valve instruction.
Drain the water and relieve pressure
in the pipes. Remove the existing
unit and install the replacement, using
only the special sprinkler wrench.
Be certain to match the model, style,

OBSOLETE
orifice, and temperature rating.
A fire protection system that has
been shut off after an activation should
be returned to service immediately.
Inspect the entire system for damage
and replace or repair as necessary.
Sprinklers that did not operate but
were subjected to corrosive elements
of combustion or excessive tempera-
tures should be inspected, and re-
placed if need be.
Guarantee: Central Sprinkler Com-
pany will repair and/or replace any
products found to be defective in
material or workmanship within a
period of one year from the date of
shipment. Please refer to the current
Price List for further details of the
warranty.
©1999 Central Sprinkler Company
Printed In U.S.A.
CEI\ITRAL
Central Sprinkler Company
451 North Cannon Avenue, Lansdale, PA 19446
PHONE [phone]
FAX [phone]
.. Ordering
1:1::11
Information
Ordering Information: When placing
an order, indicate the full product
name and correct spare sprinkler
cabinet with spare sprinklers. Also, be
sure that outlets on branch line piping
are 1" so that they can accept the 1"
thread of the ULTRA™ K-25™.
Availability and Service: Central
sprinklers, valves, accessories, and
other products are available through-
out the U.S. and Canada, and inter-
nationally, through a network of Cen-
tral Sprinkler distribution centers. You
may write directly to Central Sprinkler
Company, or call [phone] for
the distributor nearest you.
Patents: Patents are pending.
Conversion Table:
1 inch =25.400 mm
1 foot = 0.3048 m
1 pound= 0.4536 kg
1 foot pound= 1.36 Nm
1 psi= 6.895 kpa
= 0.0689 bar
= 0.0703 kg/cm
2
1 U.S. gallon= 3.785 dm
3
= 3.785 liters
Conversions are approximate.
ESFR-2.0
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