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Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com
cULus Listing Requirements: Quick Response Extended Coverage Concealed HSW Sprinkler VK638 is cULus Listed for installation in accordance
with the latest edition of NFPA 13 for extended coverage sidewall spray sprinklers:
Limited to Light Hazard occupancies with smooth, flat, horizontal ceilings only.
•
Locate the the deflector 4" to 12" (102 mm to 305 mm) below the ceiling. Install with the leading edge of the deflector oriented parallel to the ceiling
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and with the sprinkler frame arms oriented perpendicular to the ceiling (see Figure 3). THE TOP SURFACE OF THE DEFLECTOR IS MARKED
"TOP". The sprinkler must be oriented as shown in Figure 3.
Minimum distance between sprinklers is 12 ft. (3.7 m).
•
Minimum distance from end walls is 4 in. (102 mm).
•
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Maximum distance from the end wall shall be no more than one-half of the allowable distance between sprinklers. The distance shall be measured
perpendicular to the wall.
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The sprinkler installation and obstruction rules contained in NFPA 13 for extended coverage sidewall spray sprinklers must be followed.
NOTE: Concealed sprinklers must be installed in neutral or negative pressure plenums only.
IMPORTANT: Always refer to Bulletin Form No. F_091699 - Care and Handling of Sprinklers. Also refer to Form No. F_080614
for general care, installation, and maintenance information. Viking sprinklers are to be installed in accordance with the latest
edition of Viking technical data, the appropriate standards of NFPA, FM Global, LPCB, APSAD, VdS or other similar organiza-
tions, and also with the provisions of governmental codes, ordinances, and standards, whenever applicable.
Form No. F_082211
19.09.23
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
(Also refer to the Approval Chart)
Figure 3:
Rev 19.1
DESIGN CRITERIA
Correct Deflector Orientation
QREC CONCEALED HSW
SPRINKLER VK638-D (K8.0)
Page 5 of 7
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