Operation - Viking VK426 Technical Data Manual

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5. OPERATION

The sprinkler is recessed into the mounting surface, flush to the wall, with only a portion of the fusible link assembly exposed beyond
the wall. The concealed deflector is held inside the sprinkler body until the eutectic metal solder link is fused. When the sprinkler fuses,
the deflector extends to discharge and distribute water.
The special escutcheon plates shown on this document are the only escutcheon rings that may be used with these institutional
sprinklers, and all of these sprinklers must be installed with an escutcheon plate.
The sprinkler piping behind the wall leading to the sprinkler must be secured to prevent any movement of the sprinkler. One method
of anchoring the pipe behind the wall is to use the retaining flange and screw assembly that are available from Viking. The flange
slides over the sprinkler nipple prior to threading the nipple into the tee.
6. INSPECTIONS, TESTS AND MAINTENANCE
NOTICE
The owner is responsible for maintaining the fire protection system and devices in proper operating condition.
For minimum maintenance and inspection requirements, refer to NFPA 25 for Inspection, Testing and Maintenance
requirements. In addition, the Authority Having Jurisdiction may have additional maintenance requirements that must be
followed.
A. The sprinklers must be inspected on a regular basis for corrosion, mechanical damage, obstructions, paint, etc. The frequency
of inspections may vary due to corrosive atmospheres, water supplies, and activity around the device.
B. Sprinklers that have been painted or mechanically damaged must be replaced immediately. Sprinklers showing signs of
corrosion shall be tested and/or replaced immediately as required. Installation standards require sprinklers to be tested and, if
necessary, replaced after a specified term of service. Refer to the installation standards and the Authority Having Jurisdiction
for the specified period of time after which testing and/or replacement is required. Sprinklers that have operated cannot be
reassembled or reused, but must be replaced. When replacing sprinklers, use only new sprinklers.
C. The sprinkler discharge pattern is critical for proper fire protection. Nothing should be hung from the sprinkler, attached to it, or
otherwise obstruct the discharge pattern. All obstructions must be immediately removed or, if necessary, additional sprinklers
installed.
D. When replacing existing sprinklers, the system must be removed from service. Refer to the appropriate system description
and/or valve instructions. Prior to removing the system from service, notify all Authorities Having Jurisdiction. Consideration
should be given to employment of a fire patrol in the affected area.
7. AVAILABILITY
Viking Institutional Sprinklers are available through a network of domestic and international distributors. See The Viking Corporation
web site for the closest distributor or contact The Viking Corporation.
8. GUARANTEE
For details of warranty, refer to Viking's current list price schedule or contact Viking directly.
Form No. F_032319 Rev 02
© 2023 Viking Group Inc. All rights reserved
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
January 2023
INSTITUTIONAL SPRINKLERS K5.6
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