Deflector . . . . . . . . . . . . Brass
Compression Screw . . . . . Bronze
Support Cup . . . . . . . . . . Steel
Retainer
. . . . . . . . . . . . Brass
Cover Plate . . . . . . . . . . . Brass
Cover Plate Ejection Spring . . . . .
. . . . . . . . . . . . Stainless Steel
Patents
Patents are pending.
Operation
When exposed to heat from a fire, the
Cover Plate, which is soldered to the
Retainer at three points, falls away to
expose the Sprinkler Assembly.
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, activating the sprinkler and
allowing water to flow.
Design
Criteria
The Model CHEC Sprinklers are UL
and C-UL Listed for use in light hazard
occupancies, using the design criteria
in Table A, in addition to the require-
ments specified in the current NFPA 13
for extended coverage sidewall sprin-
klers.
The Model CHEC Sprinklers are only
listed and approved with the Model
CHEC Cover Plates having a factory
applied finish.
Installation
The Model CHEC Sprinklers must be
installed in accordance with the follow-
ing instructions:
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 approximately 1/16 inch
(1,6 mm).
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 maxi-
mum of 30 ft.lbs. (40,7 Nm) of torque
is to be used to install sprinklers with
3/4 NPT connections. Higher levels of
torque may distort the sprinkler inlet
with consequent leakage or impair-
ment of the sprinkler.
Do not attempt to compensate for in-
sufficient adjustment in the Sprinkler
Assembly by under- or over-tightening
the Sprinkler/Support Cup Assembly.
Page 2 of 6
TFP265
FIGURE 1
MODEL CHEC (CONCEALED HORIZONTAL EXTENDED COVERAGE)
QUICK RESPONSE LIGHT HAZARD SIDEWALL SPRINKLER
— ASSEMBLY —
SURFACE
UNTIL RETAINER
FLANGE IS FLUSH
WITH MOUNTING
PUSH INTO
SUPPORT CUP
WITH THREAD
THREADS
SUPPORT CUP
WITH ROLL FORMED
SPRING
EJECTION
BUTTON
SPRINKLER/SUPPORT CUP
ASSEMBLY
SEALING
BUTTON
3/4" NPT
FLATS
WRENCH
COMPRESSION
ASSEMBLY
BULB
SCREW
TOP
FRAME
DEFLECTOR
PLATE
COVER
COVER PLATE/RETAINER
ASSEMBLY
SOLDER
TABS (3)
RETAINER
DIMPLES
COVER PLATE
EJECTION
SPRING
