is recommended that the end user be
consulted with respect to the suitability
of these corrosion resistant coatings
for any given corrosive environment.
The effects of ambient temperature,
concentration
of
chemicals,
and
gas/chemical velocity, should be con-
sidered, as a minimum, along with the
corrosive nature of the chemical to
which the sprinklers will be exposed.
APPROVALS AND STANDARDS
Laboratory listings and approvals for
the 11.2 K-Factor, Model F892QR De-
signer, Quick Response, Standard
Coverage, Pendent and Upright Sprin-
klers are given in Table A.
WARNING
The 11.2 K-Factor, Model F892QR
Pendent and Upright Sprinklers de-
scribed herein must be installed and
maintained in compliance with this
document, as well as with the appli-
cable standards of the National Fire
Protection Association, in addition to
the standards of any other authorities
having jurisdiction. Failure to do so
may impair the integrity of these de-
vices.
The owner is responsible for main-
taining their fire protection system
and devices in proper operating con-
dition. The installing contractor or
manufacturer should be contacted
relative to any questions.
Installation of Model F892QR Pen-
dent Sprinklers in recessed escutch-
eons will void all sprinkler warran-
ties, as well as possibly void the
sprinklers Approvals and/or List-
ings.
TECHNICAL DATA
The 11.2 K-Factor, Model F892QR De-
signer, Quick Response, Standard
Coverage,
Pendent
and
Upright
Sprinklers are rated for use at a maxi-
mum service pressure of 175 psi (12,1
bar). They are available in the tem-
perature ratings and finishes indicated
in Table A.
The nominal flow “Q” in GPM (LPM) is
determined by the following formula:
where the nominal sprinkler discharge
coefficient “K” = 11.2 (161,3) and “p”
equals the residual flowing pressure in
psi (bar).
The Frame of the Model F892QR
Sprinklers, (Ref. Figure A), is a dezin-
cification resistant bronze. The Button
is bronze, and the Gasketed Spring
Plate is sealed on both its inside and
outside faces with a Teflon
gasket.
The Compression Screw and the De-
flector are brass. The quick response
Model F892QR Sprinklers utilize a 3
mm diameter frangible bulb. Table A
indicates the bulb liquid color as a
function of temperature rating.
NOTES
Inquiries concerning the appropriate-
ness of wax, lead, or polyester coated
sprinklers for a given corrosive envi-
ronment should be submitted to the
attention of the Technical Services
Department.
Wax, lead, or polyester coated sprin-
klers are not suitable for use in open
sprinkler corrosive environments.
INSTALLATION
NOTE
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 horizontal, a small air
bubble should be present. The diame-
ter of the air bubble is approximately
1/16 inch (1,6 mm) for the
135°F/57°C to 3/32 inch (2,4 mm) for
the 286°F/141°C rating.
The Model F892QR Sprinklers must
be installed in accordance with the fol-
lowing instructions.
1. With pipe thread sealant applied to
the pipe threads, hand tighten the
F892QR Sprinkler into the sprinkler
fitting.
2. Using the W-Type 3 (End A) Sprin-
kler Wrench (Ref. Fig. B) applied to
the sprinkler Wrench Flats (Ref. Fig.
A), tighten the F892QR Sprinkler
into the sprinkler fitting.
NOTE
A leak tight 3/4 inch NPT sprin-
kler joint should be obtained with
a torque of 10 to 20 ft.lbs. (13,4 to
26,8 Nm). Higher levels of torque
may distort the sprinkler inlet
with consequent leakage or im-
pairment of the sprinkler.
CARE AND MAINTENANCE
Model F892QR Sprinklers must be
maintained and serviced in accord-
ance with the following instructions:
NOTES
Before closing a fire protection system
control valve for maintenance work
on the fire protection system which it
controls, permission to shut down the
affected fire protection system must be
obtained from the proper authorities
and all personnel who may be affected
by this action must be notified.
Sprinklers which are found to be leak-
ing or exhibiting visible signs of corro-
sion must be replaced.
Automatic sprinklers must never be
shipped or stored where their tempera-
tures will exceed 100°F/38°C and they
must never be painted, plated, coated
or otherwise altered after leaving the
factory. Modified sprinklers must be
replaced. Sprinklers that have been
exposed to corrosive products of com-
bustion, but have not operated, should
be replaced if they cannot be com-
pletely cleaned by wiping the sprinkler
with a cloth or by brushing it with a soft
bristle brush.
Care must be exercised to avoid dam-
age to the sprinklers — before, during,
and after installation. Sprinklers dam-
aged by dropping, striking, wrench
twist/slippage, or the like, must be re-
placed. Also, replace any sprinkler that
has a cracked bulb or that has lost
liquid from its bulb (ref. Installation
Section Note).
Frequent visual inspections are rec-
ommended to be initially performed for
wax and/or lead coated sprinklers, af-
ter the installation has been com-
pleted, to verify the long term potential
integrity of the sprinkler coatings.
Thereafter, annual inspections per
NFPA 25 should suffice; however, in-
stead of inspecting from the floor level,
a random sampling of close-up visual
inspections should be made, so as to
better determine the exact sprinkler
condition and the long term integrity of
the wax and/or lead coating, as it may
be affected by the corrosive conditions
present.
The owner is responsible for the in-
spection, testing, and maintenance of
their fire protection system and de-
vices in compliance with this docu-
ment, as well as with the applicable
standards of the National Fire Protec-
tion Association (e.g., NFPA 25), in
Q
K p
=
FIGURE B
W-TYPE 3 SPRINKLER
WRENCH
"FITTING SIDE"
FITTING
TOWARDS SPRINKLER
RECESS
WRENCH
(END "A")
DuPont Registered Trademark
OBSOLETE
