Care and
Maintenance
The Issue A and B Window Type Ex-
posure Protection Sprinklers must be
maintained and serviced in accord-
ance with the following instructions:
NOTE
Before closing a fire protection system
main control valve for maintenance
work on the fire protection system that
it controls, permission to shut down the
affected fire protection system must be
obtained from the proper authorities
and all personnel who may be affected
by this action must be notified.
Issue A and B Window Type Exposure
Protection Sprinklers must never be
painted, plated, coated or altered in
any way after leaving the factory; oth-
erwise, the spray performance may be
impaired.
Care must be exercised to avoid dam-
age to the sprinklers - before, during,
and after installation. Sprinkler dam-
aged by dropping, striking, wrench
twist/slippage, or the like, must be re-
placed.
Frequent visual inspections are rec-
ommended to be initially performed for
nozzles installed in potentially corro-
sive atmospheres to verify the integrity
of the materials of construction as they
may be affected by the corrosive con-
ditions present for a given installation.
Thereafter, annual inspections per
NFPA 25 are required.
Exposure protection systems for the
outside of buildings require regularly
scheduled care and maintenance by
trained personnel. In addition to in-
specting sprinklers for proper spray
performance during water flow trip
tests of the system, it is recommended
that sprinklers be periodically in-
spected for loading/obstructions, or
other evidence of impaired protection.
The inspections should be scheduled
weekly or as frequently as may be
necessary, and corrective action must
be taken to ensure that the sprinkler
will perform as intended in the event of
a fire.
The owner is responsible for the in-
spection, testing, and maintenance of
their exposure protection system and
devices in compliance with this docu-
ment, as well as with the applicable
standards of the National Fire Protec-
tion Association (e.g., NFPA 25), in
addition to the standards of any other
authorities having jurisdiction. The in-
stalling contractor or sprinkler manu-
TFP835
Page 3 of 4
FIGURE 2
ISSUE A WINDOW TYPE EXPOSURE PROTECTION SPRINKLERS
NOMINAL DISCHARGE PATTERNS
Provided for reference only. Refer to NFPA 13 for the required distance to
window as a function of window width.
EACH SQUARE
= 1 SQ. FT.
WEL DEFINED
OUTLINE
(180 mm)
5/16" & 3/8"
ORIFICE
SPRINKLER
1/4"
ELEVATION
ORIFICE
1/4" & 5/16"
ORIFICE
PLAN
1/2"
LITTLE
FINE SPRAY
ORIFICE
SURFACE
GLAZING
SHOWN AT
7"
FLOWING
PRESSURE
(2,1 BAR)
30 PSI
FIGURE 3
ISSUE B WINDOW TYPE EXPOSURE PROTECTION SPRINKLERS
NOMINAL DISCHARGE PATTERNS
Provided for reference only. Refer to NFPA 13 for the required distance
to window as a function of window width.
SHOWN AT
(2,1 BAR)
PRESSURE
FLOWING
ORIFICE
1/2"
5/8"
3/4"
ORIFICE
ORIFICE
WEL DEFINED
SPRINKLER
ELEVATION
OUTLINE
GLAZING
SURFACE
ORIFICE
1/2"
5/8"
3/4"
ORIFICE
ORIFICE
30 PSI
EACH SQUARE
FINE SPRAY
PLAN
LITTLE
(215 mm)
8-1/2"
= 1 SQ. FT.