Navien NaviCirc Series Installation And Operation Manual page 11

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Items
Return Line
Sampling Time
(P.14)
Set the 2-way valve inside the water heater to "EXT. "
Description
Sets the length of time that the
circulator will operate periodically in
order to check the temperature of the
recirculation return line and see if it
needs to be re-heated.
Setting range: 1 to 120
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(in 1-minute increments)
Default: 30 min
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