Rinnai RL75iN Natural Gas

[blackrain1975]

I have a client who got convinced to install a tankless water heater (Rinnai RL75iN) instead of a boiler. Now he has called me. The system isn’t quite keeping up set at 140, and he can’t afford to install a boiler at the moment. I’m trying to help him out. Does anyone know how to get that Rinnai unit to go above 140?
Thanks.

 

[GReynolds929]

Only possible with a MCC-91-2 controller. Max temp would be 160°. This is a commercial controller and will reduce the units warranty to commercial use standards. Do you not have the manuals available?

 

[Twowaxhack]

I like Rinnai

https://s3.amazonaws.com/s3.supplyhouse.com/product_files/Rinnai-RL75IN-User-Guide.pdf

 

[blackrain1975]

Only possible with a MCC-91-2 controller. Max temp would be 160°. This is a commercial controller and will reduce the units warranty to commercial use standards. Do you not have the manuals available?

Thank you
Going to track that down today.

 

[Twowaxhack]

I posted the instruction manual for you.

Thank you
Going to track that down today.