IBC HPX 3 - Multiple Hydronic Heat Pumps Piping

6.7.8 Multiple hydronic heat pumps piping
Pressure relief valve
Buffer tank; use short fat headers. Buffer tank needs vacuum breaker for cooling mode.
Recommended expansion tank connection point
Glycol fill tank (shown), or fill station with isolation closed
Supply piping to loads
Returns from loads
Figure 13 Multiple hydronic heat pumps piping concept with buffer tank
Note that multiple heat pumps should be staged using an external control such as the IBC Sky
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6.7.8 Multiple hydronic heat pumps piping