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June 9, 1997
the recognized installation stand-
ards. The test is applied after the
sprinkler installation to ensure no
damage has occurred to the sprinkler
during shipping and installation, and
to make sure the unit has been prop-
erly tightened. If a thread leak should
occur, normally the unit must be re-
moved, new pipe joint compound or
tape applied, and reinstalled. This is
due to the fact that when the joint seal
is damaged, the sealing compound
or tape is washed out of the joint.
H. After testing, repairing all leaks, and
installation and painting of the ceiling,
the ceiling ring can be installed.
1. Remove the plastic protective
cap. (It is recommended to retain
a protective shell in the spare
sprinkler cabinet. The internal di-
ameter of the special Installation
wrench is designed for use with
the sprinkler contained in a pro-
tective shell.)
2. Push on the ceiling ring until the
ring touches the ceiling. Ceiling
rings should be installed to en-
sure proper operation of the
sprinkler.
Note: The maximum vertical adjustment
is 1/2" (12,7 mm). DO NOT MODIFY
THE UNIT. If necessary re-cut the sprin-
kler drop nipple as required.
glue or caulking material to fasten or seal
the ceiling ring to the ceiling. Such pro-
cedure may result in the sprinkler failing
to operate properly.
I. DISASSEMBLY: The ceiling ring can
be removed and reinstalled (without
removing the sprinkler) to allow ac-
cess above the ceiling or to replace if
necessary. If it is necessary to re-
move the entire unit, the system must
be removed from service. See Main-
tenance instructions and follow all
warnings and instructions.
Form No. 062395
R
TECHNICAL DATA
8. MAINTENANCE
NOTICE: The owner is responsible for
maintaining the fire protection system
and devices in proper operating condi-
tion. For minimum maintenance and in-
spection requirements, refer to the Na-
tional Fire Protection Association Pam-
phlet that describes the care and main-
tenance of sprinkler systems. In addi-
tion, the "Authority Having Jurisdiction"
may have additional maintenance, test-
ing and inspection requirements which
must be followed.
A. The sprinklers must be inspected on
a regular basis for corrosion, me-
chanical
paint, etc. The frequency of the in-
spections may vary due to corrosive
atmospheres, water supplies and ac-
tivity around the device.
B. Sprinklers that have been field
painted or mechanically damaged
must be replaced immediately.
Sprinklers showing signs of corrosion
shall be tested and/or replaced im-
mediately as required. Residential
sprinklers that are 20 years old shall
be tested and/or replaced as re-
quired. Sprinklers that have oper-
ated cannot be reassembled or re-
used, but must be replaced. When
replacing sprinklers, use only new
use
NEVER
sprinklers.
C. The sprinkler discharge pattern is
critical for proper fire protection;
therefore nothing should be hung
from, attached to, or otherwise ob-
struct the discharge pattern. All ob-
structions must be immediately re-
moved or, if necessary, additional
sprinklers installed.
D. When replacing existing sprinklers,
the system must be removed from
service.
system description and/or valve in-
structions. Prior to removing the sys-
tem from service, notify all Authorities
Figure B
damage,
obstructions,
Refer to the appropriate
Sprinkler 145 c
®
HORIZON
MODEL H-3
RESIDENTIAL PENDENT
SPRINKLER 3.8 K-FACTOR
Having Jurisdiction. Consideration
should be given to employment of a
fire patrol in the affected area.
1. Remove the system from service,
draining all water and relieving all
pressure on the piping.
2. Remove the ceiling ring. "Push-
on" ceiling rings are removed by
pulling the ring downward.
3. Place a plastic protective shell
(from the spare sprinkler cabinet)
over the sprinkler to be removed.
The internal diameter of the spe-
cial Horizon sprinkler installation
wrench is designed for use with
the sprinkler contained in the
shell.
4. Using the special sprinkler wrench,
turn the unit counterclockwise to
remove the old sprinkler from the
piping in which it is installed.
5. Install the new unit. Care must be
taken to replace the sprinkler
with the proper model, style,
orifice size, temperature rating
and response characteristics,
with approvals and listings
matching the existing sprinkler.
A fully stocked spare sprinkler
cabinet should be provided for this
purpose
6. Replace the ceiling ring.
7. Place the system back in service
and secure all valves. Check and
repair all leaks.
F. Sprinkler systems that have been
subjected to a fire must be returned
to service as soon as possible. The
entire system must be inspected for
damage and repaired or replaced as
necessary.
Sprinklers that have
been exposed to corrosive products
of combustion or high ambient tem-
peratures, but have not operated,
should be replaced. Refer to the
Authority Having Jurisdiction for mini-
mum replacement requirements.
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