Residential
Extended Coverage
Quick Response Extended Coverage
Product
Description
1
⁄
2
"
(15 mm)
Orifice
Adjustable
Pendent
Automatic
Sprinkler
The Omega Model EC-20A
Sprinkler is a low profile, aesthetically
pleasing, ceiling mounted sprinkler
that offers a high degree of protection
for human life. It operates five to six
times faster as a quick response
sprinkler than a standard sprinkler
and features a spray pattern that has
been shown to be more effective in
the control of fires.
The Model EC-20A incorporates
two significant cost-saving features: a
unique deflector that provides a much
greater area of coverage than most
other sprinklers and a special
escutcheon assembly that provides
for
7
⁄
8
" (22.2 mm) of field adjustment
resulting in an easily accomplished,
tight fit against the ceiling.
The Model EC-20A carries a triple
Listing by Underwriters Laboratories
for use as a Residential Sprinkler, an
Extended Coverage Sprinkler and a
Quick Response Extended Coverage
Sprinkler. It qualifies for installation in
residential and light hazard
occupancies in accordance with
current NFPA 13, NFPA 13D, or
NFPA 13R Standards.
The Model EC-20A has a
maximum working pressure of
175 psi.
The Model EC-20A is available in
three standard finishes, chrome
plated, brass plated or white painted.
Its mating escutcheon plate is
available in three standard finishes,
chrome plated, brass plated or white
painted. The Model EC-20A is
shipped with a protective plastic cap.
Technical
Data
Factory Hydro Test: 100% at 500 psi
(34.5 bar)
Standard Finishes:
Sprinkler: brass, chrome plated, white
and off-white painted
Escutcheon Plate: brass, chrome
plated, white and
off-white painted
Adjustable Range Below Ceiling:
3
/
8
" to 1
1
/
4
"
(9.5 mm to 31.8mm)
Highest Allowable Ambient Storage
Temperature: 100
°
F/38
°
C
Length: 2
7
/
16
"
(61.9 mm)
Width: 1
1
/
4
"
(31.8 mm)
Weight: 4.7 oz.
(133.7 grams)
This cap should be left on during
installation to help protect the EC-20A.
The plastic cap must be removed
before placing the sprinkler system in
service.
Operation: A fusible alloy pellet is
compressed with a bearing disc into a
copper housing by a ball plunger.
Heat is absorbed by the heat
collecting fins and conducted to the
alloy pellet. At the rated temperature
the alloy melts, causing the ball
plunger to drop, freeing balls from the
retaining groove. This movement
allows system water pressure to force
the orifice sealing mechanism and
deflector assembly open. Water is
then discharged in a designed flow
pattern.
Model: EC-20A
Style: Pendent (adjustable)
Orifice Size:
1
/
2
"
(15 mm)
K Factor: 5.6
(80.8)
Nominal
Thread Size:
1
/
2
"
(15mm)
N.P.T.
Temperature Rating:
Residential: 160
°
F/71
°
C
Extended Coverage: 145
°
F/63
°
C
160
°
F/71
°
C
Quick Response Extended
Coverage:
145
°
F/63
°
C
Approvals: U.L., U.L.C., M.E.A.
(Cal. No. 375-75-SA)
Maximum Working Pressure: 175 psi
(12.1 bar)
Manufactured by: Central Sprinkler Company
451 North Cannon Avenue, Lansdale, Pennsylvania 19446
EC-20A 1-98
Omega EC-20A
No. 4-7.0
OBSOLETE
