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* A Taco 008-BC6 or Grundfos 15-42 BUC7 (or equivalent) circulation pump
is recommended for use with the NCB-H boiler and DHW recirculation
systems.
* When using the external recirculation mode, observe the following
maximum recirculation pipe lengths including ttings (
3
/
4
” pipe is
recommended). Lengths in excess of these limits will require a larger
recirculation pump.
Maximum Pipe Lengths
Pipe Diameter
1
/
2
"
3
/
4
"
Maximum Pipe Length 100 ft (30 m) 400 ft (120 m)
Note
●
To use HotButton mode, install a HotButton and
recirculation pump.
●
Install the NaviCirc recirculation valve to the faucet
furthest from the NCB-H boiler.
●
If installed in close proximity to the boiler, faucets
further down the supply line will take longer to
receive hot water.
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