Pressure relief valve (shipped with the boiler): no isolation valve permitted between
boiler and relief valve
Air vent purchased separately
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.
Boiler (primary) pump
To/ from load
Dirt separator recommended
Fill station with isolation valve closed, or fill tank.
Figure 31
Boiler trim options - single boiler
47
3.11.2 System piping
Summary of Contents for SL Series
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Page 12: ...Figure 5 Top view SL 40 399 G3 Figure 6 Bottom view SL 40 399 G3 8 Section Specifications...
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Page 64: ...Figure 40 Electric wiring connections 60 Section Installation...
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Page 110: ...Internal wiring diagram Figure 46 Internal wiring diagram 106 Section Appendices...
Page 111: ...Sequence of operations Figure 47 Sequence of Operation 107 Sequence of operations...