New Tankless, need Recirc

[David426]

Hello all,
I purchased a house with a Navien npe 210s. It takes a while to get hot water to the back of the house. I googled the model number and it looks like only the "a" models have built in recirc. Is there a way to retrofit a recirc pump on the "s" model? I do not have an outlet under the sink but I do have one next to the tankless.
Thanks in advance.

 

[Fitter30]

Looking at the install manual the A model works by first pressing a hot button turns on heater and recirc page 82
https://www.google.com/url?sa=t&sou...FjAHegQIBxAB&usg=AOvVaw1zVsvLMi6T86Davc-httnD
Might consider adding a 5 gallon electric water heater for the sinks at the far end of house fed by Navien