Navien NCB700-2S Plus 42K Installation & Operation Manual page 36

4.4.9 Troubleshooting for the NaviCirc
Problems
The water from the tap is not hot
enough.
The water from the tap is not hot
enough even when the boiler is
set at a high temperature.
The water from the tap is too hot.
Hot water comes out while cold
water is being used.
Noises occur after installation.
36 Installing the System Piping
Possible Cause(s)
Full temperature water has not
reached the fixture.
The hot water temperature of the
boiler is set too low.
The NaviCirc is not installed properly.
The NaviCirc's malfunction
The boiler temperature is set too high.
The NaviCirc is operating properly.
The NaviCirc's malfunction
The flexible hoses may be bent.
Actions
Keep the fixture open to allow the hot water pipe to
purge.
Set the water heater temperature to a higher
temperature.
Contact Navien Technical Support.
Contact Navien Technical Support.
Adjust the boiler temperature.
It is normal for some hot water to flow over to the
●
cold pipe during recirculation.
If the hot water discharge continues to come from
●
the cold water tap after installation, the NaviCirc
may require service.
Contact Navien Technical Support.
Check if the flexible hoses are excessively bent. If other
noises occur, contact Navien Technical Support.