3
Design Requirements — Extended Coverage Applications
Step 4. Hand tighten the sprinkler
into the fitting. Use a Central Omega
HEC Sidewall Sprinkler Wrench to
tighten the unit into the fitting. DO
NOT use the deflector to tighten
sprinkler. A leak tight joint requires
the application of only 7 to 14 ft.-lbs.
of torque. A tangential force of 14 to
28 lbs. delivered through a 6" handle
will deliver adequate torque. Torque
levels over 21 ft.-lbs. may distort the
orifice seal, resulting in leakage.
Step 5. To install the escutcheon
plate, align it with and press it over
the sprinkler body until the outer edge
of the escutcheon meets the
mounting surface. Do not over- or
under-tighten the sprinkler to
compensate for inaccurate
escutcheon plate adjustment.
Caution: Special care must be taken
when installing with a CPVC system.
Sprinklers must be installed after the
CPVC manufacturer's recommended
setting time for the primer and
cement to ensure that neither
accumulates within the sprinkler.
Special care must be taken when
installing with a copper system.
Sprinklers must be installed only after
the inside of the sprinkler nipple and
associated fittings have been wire
brushed to remove any flux. Residual
flux can cause corrosion and in
extreme cases can impair proper
sprinkler operation.
Design
Data
*Teflon is a trademark of the DuPont Corp.
Coverage Area
Deflector
Width
Throw
Flow
Distance
Temperature
(Ft.)
(Ft.)
(Pressure)
Below Ceiling
Rating
16
16
26 GPM (21.6 psi)
12" to 20"
160
o
F/71
o
C
16
18
29 GPM (26.8 psi)
12"
160
o
F/71
o
C
In Extended Coverage applications, the Model HEC-20 sprinkler is listed for installation
12 to 20 inches below ceilings in light hazard occupancies in accordance with current
NFPA 13 Standards.
Design Requirements — Extended Coverage Quick Response Applications
Coverage Area
Deflector
Width
Throw
Flow
Distance
Temperature
(Ft.)
(Ft.)
(Pressure)
Below Ceiling
Rating
16
16
26 GPM (21.6 psi)
12"
145
o
F/63
o
C
16
18
29 GPM (26.8 psi)
12"
145
o
F/63
o
C
In Extended Coverage Quick Response applications, the Model HEC-20 sprinkler is
listed for installation 12 inches below ceilings in light hazard occupancies in accordance
with current NFPA 13 Standards.
Installation
The Model HEC-20 Sprinkler must
be installed in accordance with
current NFPA 13 and NFPA 13R
Standards. Deviations from these
standards and requirements or any
alteration to the sprinkler itself will
void any warranty made by Central
Sprinkler Company. In addition,
installation must also meet local
government provisions, codes and
standards as applicable.
The system piping must be properly
sized to ensure the minimum required
flow rate from the sprinkler.
Prior to installation, check for
proper model, style, orifice size and
temperature rating. Install sprinklers
after the piping is in place to avoid
mechanical damage; replace any
damaged unit. Wet pipe systems
must be protected from freezing.
Upon completion of the installation,
the system must be tested per
recognized standards. In the event of
a thread leak, remove the unit, apply
Sprinklers must be handled care-
fully. They must not be transported
or stored where ambient tempera-
tures may exceed 100
o
F/38
o
C. For
best results, store them in a cool, dry
location in the original shipping
package.
Do not install sprinklers that have
been dropped or visibly damaged.
Sprinklers must never be painted,
coated, plated, or altered in any other
way from manufactured condition or
they may not function properly. Any
sprinklers altered in such manner
must be replaced.
Care &
Maintenance
new pipe joint compound or tape, and
reinstall.
Installation Sequence
Step 1. The unit must be installed in
the horizontal position.
Step 2. The face of the sprinkler
fitting should be installed 1" (plus or
minus
1
⁄
8
") behind the finished wall
line. Adjustments are made via the
push-on escutcheon plate to
compensate for variations in the
fittings.
The sprinkler will function properly,
only when the system piping is
anchored to the building structure.
Otherwise, reaction forces from
system initiation could alter the
sprinkler alignment and disrupt the
distribution pattern.
Step 3. Use only a non-hardening
pipe joint compound or Teflon* tape.
Apply to the male threads only.
OBSOLETE
