Navien NaviCirc Series Installation And Operation Manual page 13

Wired Wired
on push button push button
Expansion tank***
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Flexible Flexible
hoses hoses
Flexible Flexible
hoses hoses
Expansion tank***
Note
A branch from the cold water line must
be connected to the RECIRCULATION
RETURN water connection located on
the water heater. Additionally, the end
user might experience lukewarm water
when first opening the cold water tap.
Maximum recirculation pipe lengths:
100 feet (30 m) equivalent length
●
of ½" copper pipe
400 feet (120 m) equivalent length
●
of ¾" copper pipe
* The HotButton kit is sold separately.
** Solenoid valve not required under
most conditions. Temperature
fluctuations may occur during high
system flow rates.
*** Expansion tank only required if a
check valve is installed on the cold
water supply line or if required by
local codes.
13