TFP182
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Technical
Data
Sprinkler Approvals
TY3530 (3 mm bulb)
• UL Listed, C-UL listed as quick
response
• FM approved as standard response
TY3550 (5 mm bulb)
• UL listed, C-UL listed, and FM approved
as standard response
Note:
FM does not approve concealed
sprinklers for quick response.
Note:
Approvals apply only to the service
conditions indicated in the Design Criteria
section.
Air and Dust Seal Approvals
UL and C-UL Listed
Standard Response (TY3550) application
only
Maximum Working Pressure
Maximum 175 psi (12,1 bar)
Temperature Rating
155°F (68°C) Sprinkler with
139°F (59°C) Plate
200°F (93°C) Sprinkler with
165°F (74°C) Plate
Discharge Coefficient
K= 5.6 GPM/psi
½
(80,6 LPM/bar
½
)
Adjustment
1/2 in. (12,7 mm)
Finishes
See the Ordering Procedure section.
Physical Characteristics
Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bronze
Support Cup . . . . . . . . . . . . . . . . . . . . . . . .Brass
Guide Pins . . . . . . . . . . . . . . . . . . Stainless Steel
Deflector . . . . . . . . . . . . . . . . . . . . . . . . . .Bronze
Compression Screw . . . . . . . . . . . . . . . . . .Brass
Bulb
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Glass
Cap . . . . . . . . . . . . . . . . . . . . . Bronze or Copper
Sealing Assembly . .Beryllium Nickel w/TEFLON
Cover Plate . . . . . . . . . . . . . . . . . . . . . . . . .Brass
Retainer . . . . . . . . . . . . . . . . . . . . . . . . . . . .Brass
Ejection Spring . . . . . . . . . . . . . . Stainless Steel
Design
Criteria
The Series RFII-MRI Concealed
Pendent Sprinklers are intended for
fire protection systems designed in
accordance with the standard installa-
tion rules recognized by the applicable
Listing or Approval agency; for example,
UL Listing is based on NFPA 13.
The RFII-MRI Sprinklers are only listed
with the Series RFII-MRI Concealed
Cover Plates having a factory applied
finish.
NOTICE
Do not use the
RFII-MRI Sprinklers
in
applications where the air pressure
above the ceiling is greater than that
below. Down drafts through the Sprin-
kler/Support Cup Assembly can delay
sprinkler operation in a fire situation.
Operation
When exposed to heat from a fire, the
Cover Plate, normally soldered to the
Retainer at three points, falls away to
expose the Sprinkler/Support Cup
Assembly.
The Deflector — supported by the
Guide Pins — then 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.
Installation
The Series RFII-MRI Concealed
Pendent Sprinklers must be installed
in accordance with this section.
General Instructions
Do not install any bulb-type sprin-
kler 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 diam-
eter of the air bubble is approximately
1/16 in. (1,6 mm) for the 155°F (68°C)
and 3/32 in. (2,4 mm) for the 200°F
(93°C) temperature ratings.
A leak-tight 1/2 in. NPT sprinkler joint
should be obtained by applying a
minimum to maximum torque of 7 to
14 lb-ft (9,5 to 19,0 N·m). Higher levels
of torque can distort the sprinkler Inlet
with consequent leakage or impairment
of the sprinkler.
Do not attempt to compensate for
insufficient adjustment in the Sprinkler
SPRINKLER/SUPPORT CUP
ASSEMBLY
COVER PLATE/RETAINER
ASSEMBLY
GUIDE
PINS (2)
DEFLECTOR
(DROPPED
POSITION)
COMPRESSION
SCREW
DEFLECTOR
SUPPORT
CUP WITH
ROLL FORMED
THREADS
FRAME
1/2" NPT
CAP
BULB
SEALING
ASSEMBLY
RETAINER
WITH THREAD
DIMPLES
EJECTION
SPRING
SOLDER
TABS (3)
COVER
PLATE
THREAD INTO
SUPPORT
CUP UNTIL
MOUNTING
SURFACE IS
FLUSH WITH
CEILING
FIGURE 1
SERIES RFII-MRI CONCEALED SPRINKLER
ASSEMBLY
