Specifications

Dedicated Return Line
Rinnai is the only manufacturer to offer a tankless unit, the RUR, which is easily
adaptable to plumbing systems with or without a dedicated recirculation return line
right out of the box.
In the dedicated recirculation line mode, the integrated pump circulates water from
the tankless water heater through the hot water supply line and back to the tankless
water heater via the dedicated return line. A temperature thermistor installed in the
RUR’s inlet pipe is utilized to control the on/off sequence of the integrated pump.
In homes with a dedicated return line, the RUR also provides for additional control
of the integrated pump through Rinnai’s time and temperature-based Comfort or
Economy mode. In the Comfort Mode, the pump on/off intervals can vary from 9 to
31 minutes depending on the temperature setting. When the return water reaches
the temperature called for at the tankless water heater, the pump will turn off. In the
Economy Mode, the pump on/off intervals are less frequent and vary from 18 to 62
minutes depending on the temperature setting, providing additional energy and
cost savings.
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The Rinnai Ultra Series Tankless Water Heater RUR Models
SAVING TIME, WATER AND MONEY WITH SMART RECIRCULATION.
Recirculation in action… HOW THE RUR WORKS.
Both indoor and outdoor RUR series models include a MC-195T
timer / controller, allowing you to adjust the timing and duration of the circulation system
operation for maximum energy savings. Rinnai Circ-Logic Technology built into the water
heater operates the pump during active circulation periods.
MC-195T Timer Controller
BUILDING FIXTURES
RETURN LINE
COLD WATER
DEDICATED MODE
HOT WATER