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September 17, 2009
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
Remove plastic protective sprinkler caps or bulb shields AFTER the ceiling finish work is completed where the sprinkler
is installed and there no longer is a potential for mechanical damage to the sprinkler operating elements. To remove the
bulb shields, simply pull the ends of the shields apart where they are snapped together. To remove caps from frame style sprin-
klers, turn the caps slightly and pull them off the sprinklers. SPRINKLER CAPS OR BULB SHIELDS MUST BE REMOVED FROM
SPRINKLERS BEFORE PLACING THE SYSTEM IN SERVICE! Retain a protective cap or shield in the spare sprinkler cabinet.
For concealed style sprinklers, the cover plate assembly can now be installed onto the sprinkler.
a. Remove the cover from the protective box, taking care not to damage the cover plate assembly.
b. From below the ceiling, gently place the base of the cover plate assembly over the sprinkler protruding through the ceiling
opening.
c. Push the cover plate assembly onto the sprinkler until the unfinished brass flange of the cover plate base touches the ceiling.
d. Available cover plate adjustment is ½" (12.7 mm) +/- 1/4" (6.4 mm).
For frame style sprinklers with the Model E-1 or E-2 Escutcheon, or with the Model F-1 Escutcheon, press on or thread on the outer
escutcheon cup until the flanges touch the surface of the ceiling.
a. With the E-1 or E-2 Escutcheon, the maximum recess is ½" (12.7 mm). Note: The face of the escutcheon adapter may ex-
tend up to 11/32" (8.7 mm) beyond the edge of the escutcheon cup, resulting in 27/32" (21.4 mm) total adjustment range.
If it is necessary to remove the entire sprinkler unit, the system must be taken out of service. See section 6. INSPECTIONS, TESTS
AND MAINTENANCE and follow all warnings and instructions.
5. OPERATION
Refer to the sprinkler technical data page for the sprinkler model used with the Flexible Sprinkler Drop Assembly.
6. INSPECTIONS, TESTS AND MAINTENANCE
NOTICE: The owner is responsible for maintaining the fire protection system and devices in proper operating condition. For mini-
mum maintenance and inspection requirements, refer to the latest edition of Viking technical data and the NFPA standard that
describes care and maintenance of sprinkler systems. The Authority Having Jurisdiction may have additional maintenance, testing,
and inspection requirements that must be followed.
A. 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 field 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 (e.g., NFPA 25) 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 re-used, but must be replaced. When replacement is necessary, use only new sprinklers.
C. The sprinkler discharge pattern is critical for proper fire protection. Therefore, nothing should be hung from, attached to, or other-
wise 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.
1. Remove the system from service, drain all water, and relieve all pressure on the piping.
2. Using the special sprinkler wrench, remove the old sprinkler and install the new unit. Care must be taken to ensure that
the replacement sprinkler is the proper model and style, with the appropriate orifice size, temperature rating, and response
characteristics. A fully stocked spare sprinkler cabinet should be provided for this purpose.
3. Place the system back in service and secure all valves. Check for and repair all leaks.
E. 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 temperatures, but have not operated, should be replaced. Refer to the Authority Having Jurisdiction
for minimum replacement requirements.
7. AVAILABILITY
Viking Flexible Sprinkler Drop Assemblies 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.
TECHNICAL DATA
MODEL VKFD25U
PRE-ASSEMBLED FLEXIBLE
SPRINKLER DROP
ASSEMBLIES
(UNBRAIDED)
Sprinkler 138k
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