DESIGN CRITERIA
The 2.8 K-Factor, Model LD-2 Upright, Pendent, and Re-
cessed Pendent Sprinklers are intended for fire protection
systems designed in accordance with the standard instal-
lation rules recognized by the applicable Listing or Ap-
proval agency (e.g., UL Listing is based on NFPA 13 re-
quirements). With the exception of a Starmist Recessed
Escutcheon, only the #2085 Recessed Escutcheon de-
scribed herein is to be used for recessed installations.
INSTALLATION
The 2.8 K-Factor, Model LD-2 Sprinklers must be in-
stalled in accordance with the following instructions:
NOTES
A leak tight 1/2 inch NPT sprinkler joint should be ob-
tained with a torque of 7 to 14 ft.lbs. (9,5 to 19,0 Nm). A
maximum of 21 ft. lbs. (28,5 Nm) of torque may be used
to install sprinklers with 1/2 NPT connections. Higher lev-
els of torque may distort the sprinkler inlet with conse-
quent leakage or impairment of the sprinkler.
Do not attempt to make-up for insufficient adjustment in
the escutcheon plate by under- or over-tightening the
sprinkler. Readjust the position of the sprinkler fitting to
suit.
The
Model LD-2 Pendent and Upright Sprinklers
must
be installed in accordance with the following instructions.
1. Pendent sprinklers are to be installed on the pendent
position, and upright sprinklers are to be installed in the
upright position.
2. With pipe thread sealant applied to the pipe threads, hand
tighten the sprinkler into the sprinkler fitting.
3. Tighten the sprinkler into the sprinkler fitting using only the
W-Type 9 Sprinkler Wrench (Ref. Figure 3), except that an
8 or 10 inch adjustable Crescent wrench is to be used for
wax coated sprinklers. With reference to Figure 1, the
W-Type 9 Sprinkler Wrench is to be applied to the sprinkler
wrenching area, and the adjustable Crescent wrench is to
be applied to the wrenching flanges.
When installing wax coated sprinklers with the adjustable
Crescent wrench, additional care needs to be exercised to
prevent damage to the wax coating on the sprinkler
wrenching flanges or frame arms and, consequently, ex-
posure of bare metal to the corrosive environment. The
jaws of the wrench should be opened sufficiently wide to
pass over the wrenching flanges without damaging the
wax coating. Before wrench tightening the sprinkler, the
jaws of the wrench are to be adjusted to just contact the
sprinkler wrenching flanges. After wrench tightening the
sprinkler, loosen the wrench jaws before removing the
wrench.
After installation, the sprinkler wrenching flanges and
frame arms must be inspected and the wax coating re-
touched (repaired) whenever the coating has been dam-
aged and bare metal is exposed. The wax coating on the
wrenching flanges can be retouched by gently applying a
heated 1/8 inch diameter steel rod to the areas of wax that
have been damaged, to smooth it back over areas where
bare metal is exposed.
NOTES
Only retouching of the wax coating applied to the wrenching
STAR SPRINKLER
Page 2
1-1.2.70
FIGURE 2
2.8 K-FACTOR, MODEL LD-2 PENDENT
SPRINKLER WITH #2085 RECESSED ESCUTCHEON
FIGURE 1
2.8 K-FACTOR, MODEL LD-2
STANDARD RESPONSE
PENDENT AND UPRIGHT SPRINKLERS
SPRINKLER
FACE OF
FITTING
SURFACE
MOUNTING
1/8"
(3.2 mm)
1-1/4" (31.8 mm)
1-3/4" (44.5 mm)
1/4" (6.4 mm)
3/4" (19.1 mm)
5/8±1/4"
(15.9±6.4 mm)
CLOSURE
PLATE
MOUNTING
LD-2
(57.2 mm)
2-1/4" DIA.
(73.0 mm)
2-7/8" DIA.
FLANGES
WRENCHING
PLATE
SEATING
1/2" NPT
ESCUTCHEON
SURFACE
2"
(50.8 mm)
(66.7 mm)
2-5/8"
7/16" (11.1 mm)
NOMINAL
MAKE-IN
WRENCHING
AREA
WRENCH
RECESS
WRENCH
RECESS
FIGURE 3
W-TYPE 9 (#1849) SPRINKLER WRENCH
AND
W-TYPE 10 (#1948) RECESSED SPRINKLER WRENCH
#1849
#1948
OBSOLETE
