3
Design Requirements - Quick Response Commercial Applications
The Model C-1A PRO QR Pendent Sprinklers are listed for standard cover-
age areas and standard flow requirements as specified in the current NFPA 13.
The sprinklers must be installed in the pendent position.
The Model HEC-12 PRO QR Horizontal Sidewall Sprinklers are intended for
standard coverage areas and standard flow and pressure requirements as
specified in the current NFPA 13 for light and ordinary hazard occupancies. The
sprinklers must be installed in the horizontal sidewall position, from 4" to 12"
(101.6 mm to 304.6 mm) below the ceiling.
with the rigid support collar to prevent
movement of the sprinkler away from
the finished surface (see installation
diagrams, page 2).
Step 3. Use only a non-hardening
pipe joint compound or Teflon* tape.
Apply to the male threads only.
Step 4. Hand tighten the sprinkler
into the fitting. Use a Central Omega
HEC sprinkler wrench to tighten the
unit into the fitting. A leak tight joint
requires the application of only 7 to
14 ft.-lbs. (9.5 to 19.0 Nm) of torque.
A tangential force of 14 to 28 lbs.
( 62.3 to 124.5 N) delivered through a
6" (150 mm) long handle will deliver
adequate torque. Torque levels over
21 ft.-lbs ( 28.6 Nm) may distort the
orifice seal, resulting in leakage.
Step 5. During installation of the
sprinkler, check the alignment of
retaining collar holes with final
orientation of sprinkler escutcheon.
Step 6. Test the system prior to
installing the ceiling or wall
escutcheons to avoid backing-out and
reinstalling the retaining screws and/
or closure plates.
Step 7. To install the escutcheon
plate (and closure plate if applicable),
align it (them) with and press it (them)
over the sprinkler body until the outer
edge of the escutcheon (or closure
plate) meets the mounting surface.
Do not over or under tighten the
sprinkler to compensate for
inaccurate escutcheon plate
adjustment.
Step 8.
Install the tamper resistant
retaining screws through the
escutcheon and into the retaining
*Teflon is a trademark of the DuPont Corp.
All Prohibitor™ QR sprinklers must
be installed in accordance with
current NFPA 13 and the U.L Listing
requirements described in this
brochure. Deviations from these
requirements and standards, or any
alteration to the sprinkler itself, will
void any warranty made by Central
Sprinkler Corporation. In addition,
installation must also meet local
government provisions, codes, and
standards as applicable.
The system piping must be properly
pipe scheduled or hydraulically
calculated to ensure the proper flow
rate at 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
Installation
damaged unit. Wet pipe systems
must be protected from freezing.
Upon completion of the installation,
the system must be tested per
recognized standards.
Testing must be performed with the
sprinklers installed, but should be
done prior to installing the ceiling or
wall escutcheons to avoid backing-
out and reinstalling the retaining
screws and/or closure plates.
In the event of a thread leak,
remove the unit, apply new pipe joint
compound or tape, and reinstall.
Installation Sequence
Step 1. The pendent style sprinklers
must be installed in the pendent
position. The sidewall style sprinklers
must be installed in the horizontal
position 4" to 12" (101.6mm to
304.8 mm) below ceiling.
Step 2. Install the steel nipple into
the branch line fitting, then slide the
rigid support collar over the nipple
prior to installing the 1" x
1
⁄
2
" (25 mm x
15mm) NPT reducer. The face of the
sprinkler fitting should be installed:
(a) 1
7
⁄
16
"
±
1
⁄
16
" behind the finished
wall or ceiling line, if no closure
plate is utilized. (36.5 mm
±
1.6 mm)
(b) 1
3
⁄
8
"
±
1
⁄
16
" behind the finished
wall or ceiling line, if the light-
gauge, decorative escutcheon
closure plate is utilized. (34.9
mm
±
1.6 mm)
(c) 1
5
⁄
16
"
±
1
⁄
16
" behind the finished
wall or ceiling line, if the
security closure plate is
utilized( 33.3 mm
±
1.6 mm)
The sprinkler nipple may be fitted
Model: C-1A PRO QR Pendent
HEC-12 PRO QR
Horizontal Sidewall
Orifice Size:
1
⁄
2
"
(12.7 mm)
K Factor:
C-1A PRO QR: 5.6
(80.8 metric)
HEC-12 PRO QR: 5.6
(80.8 metric)
Thread Size:
1
⁄
2
"
(15 mm)
N.P.T.
Temperature Rating: 160
°
F/71
°
C
Approvals: U.L., U.L.C.,
MEA (46-92-E Vol. III)
Maximum Working Pressure:
175 psi (12.1 bar)
Factory Hydro Test:
100% at 500 psi (34.5 bar)
Standard Finishes:
Sprinkler: brass, chrome plated
Escutcheon: brass, chrome plated,
and white painted
Escutcheon Closure: brass,
chrome plated,
white painted
Security Closure: chrome plated,
brass plated and
white painted
Length: 2
3
⁄
8
"
(60.3 mm)
Width: 2"
(50.8 mm)
Weight: 6.8 oz.
(193 grams)
Technical
Data
Design
Data
OBSOLETE
