Brochure

Now you can harness all the benefits of tankless water heating
technology, pre-assembled and ready to replace the boiler in
your existing or planned boiler and storage tank domestic water
heating system.
Built with superior quality and reliability, Rinnai’s Tankless
Rack System
TM
(TRS) oers the perfect BTU upgrade of an
old-style domestic water boiler that is reheating storage tanks.
On retro-fit applications, oftentimes you can keep your existing
tank and pump and simply replace with the lower-cost and
better-performing TRS.
The TRS installs in place of an old-style boiler and provides
built-in redundancy by banking individual Tankless Water
Heaters to ensure your hot water supply keeps flowing even
if a unit is down. The TRS comes standard with our new
condensing CU199 Tankless Water Heater that boasts 97%
thermal eciency and a heat exchanger built for the demands
of commercial applications.
Gas Supply
Condensate
Drain Line
Aquastat Connection
Optional
Pump
Bypass
Optional Tank
Bypass
Storage Tank
(No Burner or
Heating Element)
Submersible
Aquastat (Set at 20F
below Rinnai
Temperature
Setting)
Aquastat Connection
Cold Water Supply
Aquastat Connection
High Temp Return
Low Temp Return
High Temp Supply
Low Temp Supply
Rinnai Tankless
Rack System
™
Benefits
Simulated TRS with storage installation shown
Learn more at rinnai.us