Hi,
I had a new Navien NPE-240A tankless system installed about a week ago. This replaced a standard tank, which also had an external circulation pump that run continuously. I purposely chose the 'A' model as I was told it had a built-in circulation pump that offered a similar experience.
Anyway the new system works great except that it can take a 1+ minutes to get hot water out of the taps. Its clear that the circulation pump is not running. When it was first installed the plumbers had dipswitch 1 on and 2 off for "internal" circulation. They were confused as to what that meant. After looking at the manual it was obvious that I wanted the "external" mode. So I convinced them to change it to 1 off and 2 on, with the internal valve set to "EXT". After they left (they have come put 3 times total) it had never really worked.
I have included a few pics of the system. That copper pipe that is 2nd from the left is the recirc line. Its never hot! I check regularly and its always the cold. The pipe next to is the hot water and it hot whenever I check it.
Does anyone know how to get the recirc pump to run on a regular basis? Or what would stop it from running? Thanks!
I had a new Navien NPE-240A tankless system installed about a week ago. This replaced a standard tank, which also had an external circulation pump that run continuously. I purposely chose the 'A' model as I was told it had a built-in circulation pump that offered a similar experience.
Anyway the new system works great except that it can take a 1+ minutes to get hot water out of the taps. Its clear that the circulation pump is not running. When it was first installed the plumbers had dipswitch 1 on and 2 off for "internal" circulation. They were confused as to what that meant. After looking at the manual it was obvious that I wanted the "external" mode. So I convinced them to change it to 1 off and 2 on, with the internal valve set to "EXT". After they left (they have come put 3 times total) it had never really worked.
I have included a few pics of the system. That copper pipe that is 2nd from the left is the recirc line. Its never hot! I check regularly and its always the cold. The pipe next to is the hot water and it hot whenever I check it.
Does anyone know how to get the recirc pump to run on a regular basis? Or what would stop it from running? Thanks!