IMPORTANT
Primary/secondary piping is necessary in the following applications:
When using external pumps
Large zoned systems
High flow applications
Systems with high differential pressures
Systems with high pressure drops
For pressure curve information, refer to the following sections in the Appendix.
14.8 CH Pressure Drop and Flow Curve
14.9 DHW Pressure Drop and Flow Curve
Legend:
Refer to the legend below for the system applications shown in this section.
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Rinnai I-Series Condensing Boiler Combi Manual