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Marc
Marc, Plumber
Category: Plumbing
Satisfied Customers: 1126
Experience:  Plumbing heating & home maintenance contractor
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What pump can I use on a rinnai tankless heater for a circ

Customer Question

what pump can I use on a rinnai tankless heater for a circ line so that the unit will come on in comfort mode to circ hot water?
JA: Did you double-check the thermostat? And what about the unit's filters?
Customer: yes everything is good
JA: Do you plan on doing the work yourself?
Customer: yes
JA: Anything else we should know to help you best?
Customer: the circ line is done but the pump I used is not strong enough to bring unit on when comfort mode recirc is called apon
Submitted: 6 months ago.
Category: Plumbing
Expert:  Mike R. replied 6 months ago.

Hi, I'm Mike and I have 20+ years of experience as a plumber. I'll be glad to assist you today.

Expert:  Mike R. replied 6 months ago.

Is there a return line on the plumbing?

Customer: replied 6 months ago.
Expert:  Mike R. replied 6 months ago.

Sorry, I didn't read all the way to the end before I replied. What model is the Rinnai?

Customer: replied 6 months ago.
ru98i
Expert:  Mike R. replied 6 months ago.

Do you have hot water even though it takes time to get there or is it only warm? Are the dip switch settings correct?

Customer: replied 6 months ago.
everything is set up fine.iwanted to install a circ line because I was waiting to long for hotwater. tank is far from fixtures. the pump comes on and is set to comfort mode as per rinnai but when pump is on the tank will not come on to heat water for circ line. the tank works fine in all other operations.
Expert:  Mike R. replied 6 months ago.

Currently the pump is wired to the pc board and there is a check valve on the return? Are the dip switch settings currently at sw2 economy switch 4 on switch 8 off comfort switch 4 on switch 8 on?