Design
Criteria
The Model LD, 11.2 K-factor Large
Drop Storage Sprinklers are UL and
C-UL Listed and NYC Approved (MEA
466-92-E Vol. III), for use in
accordance with current NFPA 13
Standards for Large Drop Sprinklers.
The Model LD, 11.2 K-factor Large
Drop Storage Sprinklers are FM
Approved as "Control Mode Specific
Application Large Drop Sprinklers" for
use in accordance with the FM Loss
Prevention Data Sheets.
Installation
The Model LD Large Drop Storage
Sprinklers
must be installed in
accordance with the following instruc-
tions.
NOTES
Do not install any bulb type sprinkler if
the bulb is cracked or there is a loss
of liquid from the bulb. With the
sprinkler held horizontally, a small air
bubble should be present. The
diameter of the air bubble is approxi-
mately 1/16 inch (1,6 mm) for the
155
°
F/68
°
C to 3/32 inch (2,4 mm) for
the 286
°
F/141
°
C rating.
A leak tight 3/4 inch NPT sprinkler
joint should be obtained with a torque
of 10 to 20 ft.lbs. (13,4 to 26,8 Nm). A
maximum of 30 ft.lbs. (40,7 Nm) of
torque is to be used to install 3/4 inch
NPT sprinklers. Higher levels of
torque may distort the sprinkler inlet
with consequent leakage or impair-
ment of the sprinkler.
Step 1. The Model LD Large Drop
Storage Sprinklers must only be
installed in the upright position.
Step 2. With pipe thread sealant
applied to the pipe threads, wrench
tighten the LD by using only the
W-Type 3 Sprinkler Wrench (Ref.
Fig. 3). The W-Type 3 Sprinkler
Wrench is to be applied to the
sprinkler wrench flats only.
The Model LD Large Drop Stoage
Sprinklers
must be maintained and
serviced in accordance with the
following instructions.
NOTES
Before closing a fire protection system
main control valve for maintenance
work on the fire protection system it
controls, permission to shut down the
affected fire protection systems must
be obtained from the proper authori-
ties. All personnel who may be
affected by this action must be
notified.
Sprinklers which are found to be
leaking or exhibiting visible signs of
corrosion must be replaced.
Automatic sprinklers must never be
shipped or stored where their tem-
peratures will exceed 100
°
F/38
°
C and
they must never be painted, plated,
coated or otherwise altered after
leaving the factory. Modified sprinklers
must be replaced. Sprinklers that
have been exposed to corrosive
products of combustion, but have not
operated, should be replaced if they
cannot be completely cleaned by
wiping the sprinkler with a cloth or by
brushing it with a soft bristle brush.
Care must be exercised to avoid
damage - before, during, and after
installation. Sprinklers damaged by
dropping, striking, wrench twist/
slippage, or the like, must be re-
placed. Also, replace any sprinkler
that has a cracked bulb or that has
lost liquid from its bulb (Ref. Installa-
tion Section).
The owner is responsible for the
inspection, testing, and maintenance
of their fire protection system and
devices in compliance with this
document, as well as with the appli-
cable standards of the National Fire
Protection Association (e.g., NFPA
25), in addition to the standards of any
other authorities having jurisdiction.
The installing contractor or sprinkler
manufacturer should be contacted
relative to any questions.
It is recommended that automatic
sprinkler systems be inspected,
tested, and maintained by a qualified
Inspection Service.
Care &
Maintenance
OBSOLETE
