Knox FDC Plug Operating Instructions

The Knox FDC Plug has been designed for ease-of-use when installing or
®
removing the plug from a connection. Fire personnel properly equipped with
a Knox Keywrench can quickly remove the plug. In the event of debris or ice
buildup on the locking bolt head, a small flathead screwdriver or similar tool
will quickly remove any foreign matter.
Plug Identification
Each Knox FDC Plug is etched with a unique serial number
on the plug face. The plug thread size and diameter is
etched on the back of the plug. Verify that the connection
coupling thread is the same size before attempting
plug installation.
Installation
1
Remove warning tag. Remove
all debris from connection
coupling threads and from
inside the pipe. Flush system
if necessary.
Notes: • For Swivel-Guard model, line up lugs on swivel with cut outs in swivel guard ring, then spin swivel to thread FDC plug into the connection.
• FDC Plug should easily thread into connection coupling (loose fit). If the FDC Plug thread binds, remove and check threads for damage or
incorrect size.
Removal
1
Inspect locking bolt head and
remove any debris, if necessary.
2
Use the Knox Keywrench to turn
the locking bolt head counter
clockwise until fully unlocked
(Keywrench will stop).
3
Use the pins to unscrew the
plug from the connection.
4
If the locking bolt is completely loosened and the plug will still not
release, use the spanner end of the Keywrench to engage the pins
on the face of the FDC plug and unscrew counter clockwise as
shown above.
KNOX COMPANY • 1601 W. Deer Valley Road, Phoenix, AZ 85027 • (800) 552-5669 • (623) 687-2300 • Fax (623) 687-2299 • Web: www.knoxbox.com • E-mail: info@knoxbox.com
© Copyright 2009. Knox Company
Diameter
2
Taking the Knox Keywrench,
turn the locking bolt counter
clockwise until it stops to
ensure it is fully unlocked.
Knox
OPERATING INSTRUCTIONS
2.5" Plug
with Swivel-Guard
Keywrench
Threads per Inch
Key
3
Place the FDC Plug into
coupling and hand turn
clockwise until no threads are
showing. Do not use spanner.
Hand tighten ONLY.
CAUTION
Knox FDC Plugs are not designed to function as pressure-seal plugs for
wet systems. If the check valve upstream is defective and leaks water, the
water will go through the Plug to show leakage. The defective check valve
must then be repaired.
If your FDC system is back flushed for clean out, you must remember
to remove all of the Knox FDC Plugs so that contaminated water and
debris will not flood the plugs and cause contamination problems. This
is especially important if the sprinkler system has developed microbial
infestation.
FDC plugs should be inspected by a qualified inspector at least once a
year to ensure situations have not occurred that would damage
the device.
FDC Plug
®
Swivel-Guard ™
Pins
™
1.5" Plug
Spanner
4
Tighten locking bolt head
clockwise with
Knox Keywrench until firm.
Locking
Bolt Head
2.5" Plug
OPE-KBSPEC-0024-B