Manufactured by: Central Sprinkler Company
451 North Cannon Avenue, Lansdale, Pennsylvania 19446
1
⁄
2
"
(15 mm)
Orifice
Adjustable
Dry Pendent
Automatic
Sprinkler
A-1 Adjustable Dry Pendent
No. 5-3.0
Model A-1
Operation: A fusible alloy is sealed into
a bronze 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.
The Model A-1 Adjustable Dry Pendent
Sprinklers are designed for use in special
applications such as freezing environ-
ments or in conditions where sediment or
foreign materials might accumulate in
ordinary drop pipes.
Unlike standard nonadjustable dry
pendent sprinklers, the Model A-1
incorporates a special elbow that permits
2
1
⁄
2
" (63.5 mm) of field adjustment. This
exclusive and unique feature allows
flexibility which was never before
available. It ensures a perfect ceiling fit
for the sprinkler upon initial installation.
Should the ceiling sag, a simple readjust-
ment can once again obtain a perfect
ceiling fit.
The Model A-1 Adjustable Dry Pendent
Sprinklers offer considerable aesthetic
appeal. They are available concealed or
recessed.
The escutcheon assembly is com-
prised of an upper escutcheon support
piece permanently attached to the
sprinkler frame and a ceiling escutcheon
plate that slips over the installed sprin-
kler. The Model A-1 is Listed by U.L.,
F.M. and U.L.C. for use as a standard
sprinkler that qualifies for installation in
accordance with current NFPA Standards.
Product
Description
FM & MEA — Brass, Chrome
Flush & Extended
*Recessed
135
°
F/57
°
C
135
°
F/57
°
C
165
°
F/74
°
C
165
°
F/74
°
C
212
°
F/100
°
C
212
°
F/100
°
C
286
°
F/141
°
C
*
Recessed FM Approved for Light Hazard Only.
Technical
Data
Model: A-1
Style: Flush, Recessed, Extended or
Concealed
Wrench: For adjustment of sprinkler only.
See installation sequence steps 2 and 4
on page 3. Combination (Part #1106) for
recessed or Universal (Part #1122) for
concealed.
Orifice Size:
1
⁄
2
" (15 mm)
K-Factor: See K-Factor Table on page 2
Thread Size: Tube: 1" (25 mm) N.P.T.
Approvals:
U.L., U.L.C., F.M.,
MEA 375-75-SA
(See approval
charts for specific Listings)
Maximum Working Pressure: 175 psi
(12.1 bar)
Factory Hydro Test: 100% at 500 psi
(34.5 bar)
Standard Finishes:
Sprinkler: brass, chrome, white, black
Escutcheon: brass, chrome plated and
white painted with
additional special finishes
available upon request for
concealed plate.
Adjustable Dry Pendent
Flush, Recessed, Extended & Concealed
Automatic Sprinkler
1-98
Approvals
UL & ULC — Brass, Chrome, *White, *Black
Flush & Extended
Recessed
Concealed
135
°
F/57
°
C
2
135
°
F/57
°
C
2
162
°
F/72
°
C with 135
°
F/57C plate
165
°
F/74
°
C
1, 2, 3
165
°
F/74
°
C
1, 2, 3
212
°
F/100
°
C with 165
°
F/74
°
C plate
212
°
F/100
°
C
1, 2, 3
212
°
F/100
°
C
1, 2, 3
286
°
F/141
°
C
1
286
°
F/141
°
C
U.L. Corrosion Resistant Coatings: 1 = Wax, 2 = Lead, 3 = Wax-Over-Lead
* White & Black NOT ULC Listed.
OBSOLETE
