IBC VX Series Installation & Operating Manual page 49

3.11.2 System piping
Pressure relief valve (shipped with the boiler): no isolation valve permitted between boiler
and relief valve
Microbubble air eliminators are best installed where the fluid is at the highest temperature
and lowest pressure, on boiler outlet at expansion tank connection.
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.
Boiler (primary) pump
To/ from load
Dirt separator recommended
Figure 33 Boiler trim options - single boiler
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