Operation
When exposed to heat from a fire, the
Cover Plate, which is normally sol-
dered to the Retainer at three points,
falls away to expose the Sprinkler As-
sembly. At this point the Deflector sup-
ported by the Guide Pins drops down
to its operational position.
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 RFII (TY3532) Concealed Pen-
dent Sprinklers are UL and C-UL
Listed for use in light hazard occupan-
cies, using the design criteria in Table
A, in addition to the requirements
specified in the current NFPA 13 for
extended coverage pendent sprin-
klers.
The Series RFII Concealed Pendent
Sprinklers are only listed and ap-
proved with the Series RFII Concealed
Cover Plates having a metallic or white
painted finish.
The Series RFII must not be used in
applications where the air pressure
above the ceiling is greater than that
below. Down drafts through the Sup-
port Cup could delay sprinkler opera-
tion in a fire situation.
Installation
The Series RFII must be installed in
accordance with the following instruc-
tions:
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) for the 155°F/68°C and 3/32
inch (2,4 mm) for the 200°F/93°C tem-
perature ratings.
A leak tight 1/2 inch NPT sprinkler joint
should be obtained with a torque of 7
to 14 ft.lbs. (9,5 to 19,0 Nm). A maxi-
mum of 21 ft.lbs. (28,5 Nm) of torque
is to be used to install sprinklers.
Higher levels of torque may distort the
sprinkler inlet with consequent leak-
age or impairment 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.
Readjust the position of the sprinkler
fitting to suit.
Step 1.
The sprinkler must only be
installed in the pendent position and
with the centerline of the sprinkler per-
pendicular to the mounting surface.
Step 2.
Remove the Protective Cap.
Step 3.
With pipe thread sealant ap-
plied to the pipe threads, hand tighten
the sprinkler into the sprinkler fitting.
Step 4.
Wrench tighten the sprinkler
using only the RFII Sprinkler Wrench
(Ref. Figure 3). The RFII Sprinkler
Wrench is to be applied to the Sprin-
kler as shown in Figure 3.
Step 5.
Replace the Protective Cap
(Ref. Figure 4) by pushing it upwards
Page 2 of 4
TFP260
FIGURE 1
SERIES RFII CONCEALED SPRINKLER
ASSEMBLY
GUIDE
DEFLECTOR
RETAINER
WITH THREAD
DIMPLES
(DROPPED
POSITION)
PINS (2)
SPRING
EJECTION
TABS (3)
SOLDER
DEFLECTOR
ROLL FORMED
THREADS
CUP WITH
SUPPORT
FRAME
1/2" NPT
SPRINKLER/SUPPORT CUP
ASSEMBLY
COVER PLATE/RETAINER
ASSEMBLY
COVER
PLATE
THREAD INTO
UNTIL MOUNTING
SUPPORT CUP
SURFACE IS
FLUSH WITH
CEILING
SCREW
COMPRESSION
CAP
BULB
SEALING
ASSEMBLY
* Registered Trademark of DuPont
TABLE A
SERIES RFII (TY3532)
155F/68C AND 200F/93C CONCEALED SPRINKLER
HYDRAULIC DESIGN CRITERIA
RESPONSE
RATING
QUICK
QUICK
STANDARD
SPACING
MINIMUM
FLOW/PRESSURE
16’ x 16’
(4,9 m x 4,9 m)
18’ x 18’
(5,5 m x 5,5 m)
20’ x 20’
(6,1 m x 6,1 m)
26.0 GPM / 21.6 PSI
(98,4 LPM / 1,49 BAR)
33.0 GPM / 34.7 PSI
(124,9 LPM / 2,39 BAR)
40.0 GPM / 51.0 PSI
(151,4 LPM / 3,52 BAR)
OBSOLETE
