TFP226
Page 2 of 4
Operation
The glass bulb contains a fluid that
expands when exposed to heat. When
the rated temperature is reached, the
fluid expands sufficiently to shatter the
glass bulb, allowing the sprinkler to
activate and flow water.
Design
Criteria
The EC-8C 8.0 K-factor Special Appli-
cation, Quick Response Pendent and
Recessed Pendent Sprinklers must
only be installed in accordance with
the applicable UL Listing requirements
as indicated below. Only the Style 30 or
40 Recessed Escutcheon is to be used
for recessed installation, as applicable.
UL Listing Requirements
1.
The Series EC-8C Pendent Sprin-
klers may be used for the coverage
areas shown in Table A, based on
maintaining the minimum specified
flow rate as a function of coverage
area for all of the sprinklers in the
design area.
2.
With respect to heat sensitivity,
the Series EC-8C Pendent Sprin-
klers can be used with unobstruct-
ed construction consisting of flat,
smooth ceilings (including bar
joists) with a maximum pitch of one
in six as defined and permitted by
NFPA 13.
3.
The minimum allowable spacing
between the Series EC-8C Pendent
Sprinklers, to prevent cold sol-
dering, is 12 ft (3,7 m) in the 28 ft
(8,5 m) long spray direction.
4.
The Series EC-8C Pendent Sprin-
klers are not to be installed with the
short spray direction, 8 ft (2,4 m) or
10 ft (3,1 m), oriented towards an-
other Series EC-8C Pendent Sprin-
kler’s short spray direction (See
Figure 6).
5.
The Series EC-8C Pendent Sprin-
klers are to be installed in accor-
dance with all other requirements
of NFPA 13 for extended coverage
pendent sprinklers.
Installation
The Series EC-8C 8.0 K-factor Special
Application, Quick Response Pendent
and Recessed Pendent Sprinklers
must be installed in accordance with
this section.
General Instructions
Do not install any bulb type sprinkler
if the bulb is cracked or there is a loss
of liquid from the bulb. With the sprin-
kler held horizontally, a small air bubble
should be present. The diameter of the
air bubble is approximately 1/16 in.
(1,6 mm).
A leak tight 3/4 in. NPT sprinkler joint
should be obtained with a torque of
10 to 20 lb-ft (13,6 to 27,1 N
·
m). Higher
levels of torque may distort the sprin-
kler inlet with consequent leakage or
impairment of the sprinkler.
Do not attempt to compensate for
insufficient adjustment of an escutch-
eon plate by under-or over-tightening
the sprinkler. Re-adjust the position of
the sprinkler fitting to suit.
Step 1.
The sprinkler must be installed
with the deflector parallel to the mount-
ing surface. Pendent sprinklers must be
installed in the pendent position. The
deflector is marked with “<-28 FEET
(8,5 M)->” to indicate the direction of
the 28 ft (8,5 m) coverage length. The
frame arms do not need to be aligned
parallel to the sprinkler pipe.
Step 2.
After installing the Style 30 or
40 mounting plate (or other escutch-
eon, as applicable) over the sprinkler
pipe threads, and with pipe thread
sealant applied to the pipe threads,
hand tighten the sprinkler into the
sprinkler fitting.
Step 3.
Wrench tighten the deflector so
that the marking “<-28 FEET (8,5 M)->”
on the deflector is in the direction of
the 28 ft (8,5 m) coverage length. The
frame arms do not need to be aligned
parallel to the sprinkler pipe. Use
only the W-Type 6 (End “B”) Sprinkler
Wrench or with a recessed escutcheon
the W-Type 7 Sprinkler Wrench. The
wrench recess of the applicable sprin-
kler wrench (See Figures 4 and 5) is to
be applied to the sprinkler wrench flats
(See Figure 1).
Description
Coverage
Area
Flow
Rate
Pressure
TY4282 (K=8.0)
Pendent
28 ft x 8 ft
(8,5 m x 2,4 m)
23 gpm
(87,1 lpm)
8.3 psi
(0,6 bar)
28 ft x 10 ft
(8,5 m x 3,1 m)
28 gpm
(106 lpm)
12.3 psi
(0,9 bar)
Note:
For coverage area dimensions less than or between those listed, use the minimum flow required for
the next highest coverage area.
-
-
-
-
-
-
4
2
3
1
6
5
Bulb
Button
Frame
Deflector
Components:
Temperature
rating indicated
on Deflector
Sealing
Assembly
Compression
Screw
*
*
*
RECESSED PENDENT
PENDENT
CROSS SECTION
1/2" (12,7 mm)
NOMINAL MAKE-IN
ESCUTCHEON
PLATE SEATING
SURFACE
STYLE 30 or 40
RECESSED
ESCUTCHEON
WRENCH
FLATS
6
5
3
1
2
4
2-7/8" (73,0 mm) DIA.
3/4" NPT
1-7/16"
(36,5 mm)
2-1/4"
(57,2 mm)
FIGURE 1
SERIES EC-8C (TY4282)
SPECIAL APPLICATION PENDENT AND RECESSED PENDENT SPRINKLER
TABLE A
FLOW CRITERIA FOR UL LISTING
OF SERIES EC-8C SPRINKLERS
