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.
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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,
