Victaulic VicFlex AB12, Field Installation Handbook

Page: 120 / 204

I-VICFLEX_120
STYLE VS1 DRY SPRINKLER INSTALLATION
FOR FIRE PROTECTION SERVICE REV_A
FOR DRY SYSTEMS ONLY:
• The Style VS1 Dry Sprinkler’s inlet shall be installed only into the outlet of a fitting
(excluding elbows) or welded outlet that meets the dimensional requirements of
ANSI B16.3 and ANSI B16.4, Class 125 and Class 150. Use a sample fitting to
confirm proper engagement and to verify that there is no interference between the
sprinkler and the fitting.
Style VS1 Dry Sprinklers in an unheated space shall be installed
with a continuous downward slope along its entire length from the
branch line fitting to the sprinkler. No localized low points shall be
present along the length of the Style VS1 Dry Sprinkler.
Style VS1 Dry Sprinklers in an unheated space are not permitted
to be installed into the top of the branch line piping. Style VS1 Dry
Sprinklers shall be installed into the side or from the bottom of the
branch line piping.
In a heated space, if a portion of the Style VS1 Dry Sprinkler is
installed from the top of a branch line and then extends into an
unheated space, it shall be installed with a continuous downward
slope along the entire length from the inside wall to the outlet of
the sprinkler. No localized low points shall be present along the
length of the sprinkler in the unheated space. Refer to the drawing
below.
Hea
ted Spac
e
Unhea
ted Spac
e
Inlet
Outlet
Downward
Slope