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 F890 Pendent
Sprinklers in recessed escutcheons
other than the F705 will void all
sprinkler warranties, as well as pos-
sibly void the sprinklers Approvals
and/or Listings.
TECHNICAL DATA
The 8.0 K-Factor, Model
F890 De-
signer Quick and Standard Response
Extended
Coverage
Light
Hazard
(ECLH) Pendent and Recessed Pen-
dent Sprinklers are rated for use at a
maximum service pressure of 175 psi
(12,1 bar) and they are available in the
temperature ratings and finishes indi-
cated in Table A.
Recessed versions of the F890 ECLH
Sprinklers are obtained by utilizing the
Model F890 Pendent Sprinkler in com-
bination with the Model F705 Re-
cessed Escutcheon. The Model F705
Escutcheons are available either with
a chrome plated finish or a coated fin-
ish in any color.
The flow “Q” in GPM (LPM) is deter-
mined by the formula:
where the nominal sprinkler discharge
coefficient “K” equals 8.0 (115.2) and
“p” equals pressure in psi (bar).
The F890 utilizes a 3 mm Bulb with a
die-cast
dezincification
resistant
bronze alloy Frame. The two pieces of
the Button Assembly are constructed
from brass and copper. The Gasketed
Spring Plate consists of a beryllium
nickel disc spring that is sealed on
both its inside and outside edges with
a Teflon
gasket. The Compression
Screw is a bronze, and the Deflector is
brass.
The F705 Recessed Escutcheon pro-
vided for use with the F890 ECLH
Sprinklers (Ref. Figure B) has a Clo-
sure and Mounting Plate fabricated
from low carbon steel. The Mounting
Plate prongs, which are compressed
back into the Mounting Plate as the
Closure is pushed over it, maintain a
tight friction fit between the two pieces.
The Mounting Plate and Closure can
also swivel relative to each other and
compensate for non-perpendicularity
between the F890 ECLH Sprinkler and
the ceiling.
DESIGN CRITERIA
The 8.0 K-Factor, Model
F890 De-
signer Quick and Standard Response
Extended
Coverage
Light
Hazard
(ECLH) Pendent and Recessed Pen-
dent Sprinklers are only to be installed
in accordance with Table B-1 or B-2,
as applicable.
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 200°F/93°C tempera-
ture ratings.
The Model F890 ECLH Sprinklers
must be installed in accordance with
the following instructions:
1. Prior to installing each sprinkler, ver-
ify that the face of the sprinkler fitting
is within the proper range of distance
which can be accommodated by the
particular type of escutcheon.
When installing the F890 Sprinkler
with the F705 Recessed Escutch-
eon, for best overall appearance,
use Dimension “A” indicated under
the “Fully Recessed Dimensions”
heading of Figure B. Otherwise, use
Dimension “A” under the “High Ad-
justment Dimensions” heading. In
either case, the remaining adjust-
ment can then be used to compen-
sate for the possible manufacturing
variations in the take-out of the fit-
tings, as well as in the make-in of the
sprinklers (as permitted by ANSI
B1.20.1).
2. With pipe thread sealant applied to
the pipe threads and after installing
the F705 Mounting Plate (or other
escutcheon, as applicable) over the
sprinkler threads, hand tighten the
sprinkler into the sprinkler fitting.
Q
K p
=
—2—
TABLE A
LABORATORY LISTINGS AND APPROVALS
(REFER TO TABLE B-1 OR B-2 FOR RESPONSE CHARACTERISTICS)
DuPont Registered Trademark
TYPE
TEMPERATURE
RATING
BULB
COLOR
CODE
NATURAL
BRASS
CHROME
PLATED
POLYESTER
COATED
(All Colors)
135°F/57°C
155°F/68°C
175°F/79°C
Red
Yellow
Orange
PENDENT
(SIN G1890)
RECESSED*
(SIN G1890)
Yellow
135°F/57°C
Orange
155°F/68°C
Red
175°F/79°C
1, 2, 3
1, 2, 3
NOTES:
1. Listed by Underwriters Laboratories, Inc.
2. Listed by Underwriters Laboratories for use in Canada (i.e. C-UL Listed).
3. Approved by Factory Mutual Research Corporation.
*
Installed with 3/4 Inch Model F705 Recessed Escutcheon.
SPRINKLER FINISH
200°F/93°C
Green
Green
200°F/93°C
1, 2
1, 2
OBSOLETE
