Rinnai Rice Cooker RU90e, RU80e, RUCS75i, RUS75e, RUCS65i User Manual
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The Ultra Experience Of An
ENDLESS SUPPLY OF
HOT WATER.
ULTRA SERIES TANKLESS WATER HEATERS
Our performance
is proven.
OUR PROMISES
ARE KEPT.
Nearly 100 years ago, we at Rinnai
established a tradition of never settling for
less than the absolute best—a tradition
that has grown even stronger today.
Thanks to superior design and engineering,
Rinnai residential and commercial water
heating and home heating solutions
continually raise the standard in comfort,
convenience and reliability. In fact, our
commitment to building in quality at every
level has made Rinnai Tankless Water
Heaters the #1 selling tankless water
heating brand in the U.S. and Canada.
Beyond manufacturing the highest quality
tankless water heaters and home heating
products, our people stand behind all
that we make, before, during and long
after installation. From 24/7/365 technical
support for professionals, to our national
network of independent installers, to
on-sta engineers who can assist with
choosing the right products and sizes—
we’re inspiring condence right along with
the comfort our solutions provide.
From products to service and everything
in between, our dedication to delivering
our absolute best never wavers.
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Enhancing the
COMFORTS OF HOME.
With either Rinnai Tankless Water Heaters or
the RH180 Hybrid Tank-Tankless Water Heater,
homeowners can now have more hot water than
they ever thought possible.
The innovation behind our high-eciency water
heaters provides an endless supply of hot water
wherever and whenever it’s needed – even
for multiple tasks at the same time. Showers
and baths? Laundry and dishes? On-demand
heating means hot water is always available, so
prioritizing activities and scheduling water use
is no longer necessary.
Because they operate on an as-needed basis,
Rinnai Tankless Water Heaters can use up to 40
percent* less energy than traditional systems,
which helps reduce utility costs. This ecient
operation can also contribute to a favorable
HERS rating and optimize LEED certication.
*As based on the average cost to run an electric tank water heater per the DOE Average Energy Costs (www.doe.gov).
On top of eciency, our tankless water heaters
feature a copper heat exchanger for unparalleled
quality, durability and safety. And their compact
design oers substantial space savings in the
home.
The RH180 Hybrid Tank-Tankless Water Heater
harnesses the same on-demand tankless
technology coupled with an ecient storage
tank to deliver more hot water with less recovery
time than a traditional tank. And professionals
enjoy time and labor savings with quick and easy
installation using standard tank connections.
The exibility and convenience of endless hot
water. The reliability of proven engineering.
It’s everything homeowners need to feel
comfortable.
Only from Rinnai.
Commercial Solutions –
where the demands are greatest,
RINNAI DELIVERS.
Leveraging decades of global commercial water heating experience,
Rinnai Tankless Water Heaters deliver performance and reliability.
Precision engineering and commercial-grade features allow Rinnai
Tankless Water Heaters to produce an endless supply of hot water
to suit even the most demanding applications—from restaurants to
hotels to multifamily residences to schools and more— conserving
energy that can save thousands of dollars in capital, operational
and life cycle costs, while providing redundancy and saving space.
But it’s not just performance that sets us apart. Our commitment to
safety, quality and support has made us the #1 selling tankless brand
in the U.S. and Canada.
From products to service and everything in-between, our dedication to
delivering our absolute best never wavers.
For A Free Sizing Consultation, Call Our Application
Engineers At 866-383-0707.
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Rinnai Tankless Solutions Give You
THE POWER TO LIVE BETTER.
Tankless technology that saves you time.
Never think about your hot water needs again: Innovative technology provides an endless supply of hot water whenever
and wherever it’s needed – even for simultaneous uses at multiple xtures. Showers and baths? Absolutely. Laundry and
dishes? No problem. Prioritizing activities and scheduling hot water use is a thing of the past.
Save money, splurge on performance.
Designed for eciency: Rinnai’s tankless technology features copper heat exchangers to provide maximum eciency and
uses up to 40 percent less energy* than a traditional tank.
Save energy: By operating only when hot water is needed, and no storage tank to heat and reheat water, our tankless
technology helps save on energy and utility costs. The use of an electronic ignition means no standing pilot light that constantly
uses energy.
A smart investment: Increase your home’s value with premium technology, increased energy eciency, an improved Home
Energy Rating System (HERS) Index Score and optimized LEED certication. Available energy eciency rebates and tax
credits oer the opportunity to help make your purchases more aordable.
Multiple sizes: Rinnai gives you options to right-size your installation and customize your eciency.
Replace parts, not systems: Every part of a Rinnai Tankless Water Heater is replaceable. Components can be easily
exchanged, if needed, versus replacing the entire system.
Save space with a compact design.
Maximum output, minimum space: About the size of a small suitcase at 18.5” x 26” x 10” or smaller, these wall-mounted
models can be installed on interior or exterior walls and in compact spaces to free up valuable space.
Flexible installation: Small size allows for installation in non-traditional spaces such as crawl spaces and attics, making it
perfect for use in any size home, including manufactured and modular homes.
Stay green with a sustainable choice.
Earth-friendly eciency: Our tankless technology achieves maximum energy eciency, helping to conserve natural
resources.
Less waste: Compact heat exchanger design, longer product lifespan up to twice as long as a traditional tank** and recyclable
parts means less waste in landlls.
High standards for low emissions: Lower CO2 emissions contribute to cleaner air and a healthier environment.
CONDENSING
TECHNOLOGY
Ultra Series
THE ULTIMATE IN EFFICIENCY.
Delivering our most energy-ecient performance, the Ultra Series features a
condensing design with two heat exchangers to maximize heating value to enhance
reliability and durability and reduce maintenance.
UNIQUE FEATURES OF ULTRA SERIES
• Energy Factor of up to .96
®
• ENERGY STAR
• Available in ve sizes:130,000, 152,000, 160,000, 180,000 and 199,000 BTU
• Allows for either Concentric Polypropylene or dual-pipe PVC/CPVC venting,
providing the most venting exibility in a single application of any manufacturer
• Faster hot water provided by integrated recirculation pump and internal bypass line
(RUR models) with or without a dedicated return line
• Easy maintenance is achieved with included isolation valves
qualied
* As based on the average cost to run an electric tank water heater per the DOE Average Energy Costs (www.doe.gov).
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** Based on DOE ENERGY STAR® lifecycle estimates.
CONDENSING TANKLESS TECHNOLOGY
RINNAI ULTRA SERIES - RUR MODEL
Imagine turning on a shower and getting hot water almost immediately. Considering the average family loses precious time and
numerous gallons a day waiting for water to heat up, that would be an invaluable change in routine. If you’re tired of standing idly
by while time and water go down the drain, Rinnai has ve words that are sure to inspire you: Faster Hot Water Is Here!
Bringing Faster Hot Water Home.
Our focus on enhancing homeowners’ lives by changing the way water is heated has created an exciting breakthrough in
recirculation that puts faster hot water a turn of the knob away.
Rinnai’s Ultra Series Tankless Water Heater RUR Models use thermal bypass technology that includes an integrated recirculation
pump, an internal bypass line inside the model and a thermal bypass valve, and MC-195T 24-Hour Digital Controller provided
inside the box to send unlimited hot water wherever and whenever it’s needed, all in one comprehensive solution. By keeping
a steady supply of heated water in the supply line during active circulation periods, the RUR makes hot water rapidly available
in showers, sinks and appliances such as washing machines and dishwashers.
Wait Less, Waste Less.
Getting hot water faster creates signicant benets above and beyond the convenience of saving time. Recirculation means
less water and money down the drain, saving on natural resources and the utility costs related to gas and water usage.
And you can save even more energy by programming the 24-hour digital controller that’s included in the box. It enables the
scheduling of multiple recirculation events throughout the day to align with usage patterns and ensure hot water is available
at the xtures during peak demand times such as early morning before work and school.
With the typical U.S. home wasting potentially thousands of gallons of water annually waiting for hot water, the RUR’s fast-
track delivery system pays o at the faucet and in the budget. And the convenience and comfort of hot water recirculation
is an attractive feature that adds resale value to a home.
Adaptable to plumbing systems with or without a dedicated recirculation line, the Ultra Series Tankless Water Heater RUR
Models are the only tankless water heaters to feature both Concentric and PVC/CPVC venting options on the same model,
oering the ultimate exibility.
The pleasure of faster hot water is truly at hand. And big water and gas savings are on tap, too. Thanks to Rinnai’s smart
recirculation technology, there is less waiting and less waste.
Rinnai introduces the rst and only tankless
water heater in the industry to oer both
concentric and PVC/CPVC venting and
integrated recirculation on the same
model. Rinnai Tankless Water Heaters
deliver trusted quality and proven reliability
you can count on. From ecient, durable
products to experienced support, there is
simply no better choice than Rinnai.
• Wide range of quality product oerings
• Easy, safe ventilation options
• 24/7 technical support for professionals
• Engineering application support for
commercial customers
• Industry-leading recirculation capabilities
• More venting solutions on the same model
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Concentric Vent Stack
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Dual Pipe Vent Option
3
Burner & Gas Manifold
4
Primary Heat Exchanger
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Secondary Heat Exchanger
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Integrated Condensation Trap
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Built-In Circulation Pump
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Internal Bypass Line
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Modulating Gas Valve
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Built-In Surge Protector &
PC Board
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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.
Dedicated Return Line
Rinnai is the only manufacturer to oer a tankless model, 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/o sequence of the
integrated pump.
HOT WATER FIXTURES
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/o 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 o. In the Economy mode, the pump on/o intervals are less frequent and
vary from 18 to 62 minutes depending on the temperature setting, providing
additional energy and cost savings.
DEDICATED MODE
HOT WATER
COLD WATER
RETURN LINE
MC-195T 24-Hour Digital Controller
Both indoor and outdoor RUR models include a MC-195T 24-Hour Digital 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.
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