Rinnai RU180i Recirculation

[hokiecjb97]

Just installed a Rinnai RU180i that has circ-logic, but requires an external pump. I can’t find the pump that works with this unit and one that will work with a crossover valve as I don’t have a dedicated return. They offer a GTK03 and GTK15, but neither seem to say they are compatible and neither mention cross-over (comfort valves). Any recommendations? I put the old recirc pump in the circuit, but it doesn’t drive enough flow to kick the unit on.

 

[Fitter30]

Heres a manual for ciri logic looks like crossover valve for RUR models only all others need a recirc piping.

https://www.google.com/url?q=https://www.rinnai.us/sites/default/files/2020-05/100000631-Recirculation%20with%20On-Demand%20Accessories%20User%20Guide.pdf&sa=U&ved=2ahUKEwjc0b6MiOzsAhWOKs0KHdhhAhEQFjACegQIChAB&usg=AOvVaw1C6p94xH9ErXa553ZGMXKC

 

[Sponsor]

 

[Jadnashua]

If you're going to fire the thing up frequently, I'm not sure I see the advantage of a tankless system.

IMHO, the best way to get recirculation with a tankless is to use a small external tank. Some tankless systems have one built-in.

 

[D. Shelston]

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