TFP184
Page 2 of 4
Operation
When exposed to heat from a fire, the
Cover Plate, soldered to the Retainer at
three points, falls away to expose the
Sprinkler Assembly. At this point the
Deflector supported by the Guide Pins
drops down to its operational position.
When the rated temperature of the
Solder Link Element is reached, the
Link Element separates, allowing the
sprinkler to activate and flow water.
Design
Criteria
The TYCO ILLUSION, 11.2 K-factor,
Extra Large Orifice Concealed Pendent
Sprinklers are UL and C-UL Listed as
quick response -standard spray sprin-
klers for use in accordance with the
current NFPA standard; however, in
accordance with its UL and C-UL
Listing it cannot be used for the pro-
tection of storage.
The ILLUSION Concealed Pendent
Sprinklers are only listed and approved
with the ILLUSION Concealed Cover
Plates having a factory applied finish.
The ILLUSION must not be used
in applications where the air pres-
sure above the ceiling is greater than
that below. Down drafts through the
Support Cup could delay sprinkler
operation in a fire situation.
Installation
The TYCO ILLUSION, 11.2 K-factor,
Extra Large Orifice Concealed Pendent
Sprinklers must be installed in accor-
dance with this section.
General Instructions
A 3/4 in. NPT sprinkler joint should be
obtained with a minimum to maximum
torque of 10 to 20 lb-ft (13,4 to
26,8 N·m). Higher levels of torque may
distort the sprinkler inlet with conse-
quent leakage or impairment of the
sprinkler.
Do not attempt to compensate for
insufficient 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
applied to the pipe threads, hand
tighten the sprinkler into the sprinkler
fitting.
Step 4.
Wrench tighten the sprinkler
using only the W-Type 18 Sprinkler
Wrench (Ref. Figure 3). The W-Type 18
Sprinkler Wrench is to be applied to the
Sprinkler as shown in Figure 3.
Step 5.
Replace the Protective Cap
(Ref. Figure 2) by pushing it upwards
until it bottoms out against the Support
Cup. The Protective Cap helps prevent
damage to the Deflector and Arms
during ceiling installation and/or during
application of the finish coating of the
ceiling. It may also be used to locate
the center of the clearance hole by
gently pushing the ceiling material
against the center point of the Protec-
tive Cap.
NOTICE
As long as the Protective Cap remains
in place, the system is considered to be
“Out of Service”.
Step 6.
After the ceiling has been
completed with the 2-1/2 in. (63,5 mm)
diameter clearance hole and in prep-
aration for installing the Cover Plate
Assembly, remove and discard the Pro-
tective Cap, and verify that the Deflec-
tor moves up and down freely. If the
Sprinkler has been damaged and the
Deflector does not move up and down
freely, replace the entire Sprinkler
assembly. Do not attempt to modify or
repair a damaged sprinkler.
SPRINKLER/SUPPORT CUP
ASSEMBLY
COVER PLATE/RETAINER
ASSEMBLY
LEVER
DEFLECTOR
SADDLE
BODY
(3/4" NPT)
CAP
COVER
PLATE
EJECTION
SPRING
RETAINER
WITH THREAD
DIMPLES
SOLDER
TAB
SEALING
ASSEMBLY
COMPRESSION
SCREW
DEFLECTOR
(OPERATED
POSITION)
SPRINKLER
WRENCHING
AREA
SOLDER LINK
ELEMENT
SUPPORT
CUP WITH
ROLL FORMED
THREADS
GUIDE
PIN
GUIDE PIN
HOUSING
THREAD INTO
SUPPORT
CUP UNTIL
MOUNTING
SURFACE IS
FLUSH WITH
CEILING
FIGURE 1
THE ILLUSION (TY5521)
CONCEALED PENDENT SPRINKLER ASSEMBLY
