IBC VX Series Installation & Operating Manual page 53

3.11.2 System piping
Pressure relief valve (shipped with boiler): no isolation valve permitted between boiler and
relief valve
Hydraulic separator
Expansion tank connection (point of no pressure change) should be on the suction side of
the circulator, with minimal pressure drop between.
Fill station with isolation valve closed, or fill tank
Supply piping to loads
Returns to loads
Boiler (primary) pump
Figure 37 Primary-Secondary piping concept with hydraulic separator
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