IBC VFC 15-150

1-21
INSTALLATION
VFC 15-150 - VFC 45-225 MODULATING GAS BOILERS
The VFC modulating series boilers are designed to supply three different
heating loads with temperatures within the range 34°F to 185°F - to meet three
separately piped loads. Use closely spaced tees to connect each pumped “load”
(e.g.DHW,baseboardsorradiantoor)totheprimaryloop,oremploytheuse
of a hydraulic separator to isolate the boiler loop from the system and pipe the
system from the secondary side of the separator.
A variety of application drawings showing basic design options are available from
the IBC web site at: www.ibcboiler.com
Always ensure that loads sensitive to high temperatures are protected using
means such as an aquastat (wired to the boiler’s auxiliary interlocks) or mixing
valvesetformaximumlimit(say140°F)toprotectradiantoors.
Figure 25: Important Primary/Secondary piping details with hydraulic separator
Figure 24: Primary/Secondary piping concept with hydraulic separator