Installation Manual

54 Rinnai I-Series Condensing Boiler Solo Manual
Rinnai requires the use of hydraulic separaon between the boiler and central heang system.
Hydraulic separaon and primary/secondary piping allow two or more circulators in a hydronic
system to operate independently, without interfering with ow in connecng piping circuits.
Distance no
more than four
pipe diameters
IMPORTANT
For closely spaced tee installaons, the
separaon at the header is to be no
more than four pipe diameters.
Closely Spaced Tees
Boiler Supply
Boiler Return
NOTE
Examples of Hydraulic Separaon
Closely spaced tees and low loss headers are common examples of hydraulic separators and are
used to separate the boiler loop from the central heang loop.
When Rinnai I-Series Boilers are in use with Rinnai air handlers, please reference the air handler
Installaon and Operaon Manual for installaon and performance details.