Specification

SUPER-HIGH-EFFICIENCY (CONDENSING)
TANKLESS WATER HEATER
Installaon Type Internal (Indoor) Commercial Applicaons
Model Numbers CU199i (REU-N3237FFC-US)
CU160i (REU-N2530FFC-US)
Approved Gas Types Natural and Propane
UEF up to 0.93
Eciency
Rangs not cered
by AHRI
Thermal Eciency: Up
to 97%
EF: 0.96 (CU199i)
0.95 (CU160i)
High Altude Approved Up to 10,200  (3,109 m)
Water Flow Control Water Flow Sensor, Electronic Water
Control and Bypass Control
Controller
Standard: Integrated Controller
Oponal: MC-91-2US
Cercaons AHRI, ANSI Z21.10.3, CSA 4.3, and ENERGY
STAR®
Warranty
• Heat Exchanger: 8 years or 12,000 operaon hours, whichever occurs
rst
• All Other Parts and Components: 5 Years
• Reasonable Labor: 1 Year
Safety Devices
Flame Failure - Flame Rod, Boiling Protecon, Combuson Fan RPM
Check, Over Current - Glass Fuse, Remaining Flame (OHS) and Automac
Frost Protecon
Included with Purchase
Tankless Water Heater, Wall Mounng Bracket, Pressure Relief Valve and
Adapter, Isolaon Valve Kit, Vent Screens (x2), Vent Screen
Screws (x2), and Self-Tapping Screws (x2)
Addional Features
• Complies with South
Coast Air Quality
Management District
14 ng/J or 20 ppm
NOx Emission Levels
• Ultra Low NOx
• Tankless Rack System™ Compable
• 1/2 in. (13 mm) Gas Line Compable
●
Room Air Screen, Condensate Neutralizer, ScaleCuer, Drain
Down Kit, Addional Controllers, Recess Box, Recirculaon
Pump, DPS/MIS Switch, EZConnect™ Cables, Cascade Cables,
control·r™ Wi-Fi Module, Wireless Accessories, and many
more. Visit rinnai.us for a complete list of accessories.
• Compact Design to Save Space
• Wi-Fi Technology for Remote Monitoring and Management
• Sliding Mounng Bracket for Easy Installaon
• Simple Gas Conversion
• Concentric or Schedule 40 PVC/CPVC
• Direct Vent (Concentric and Twin Pipe)
• Non-Direct Vent (Room Air)
• Common Vent (Direct Vent and Room Air)
Vent lengths up to 150  with eight Tankless Water Heater
units.
• Maximum Equivalent Vent Lengths:
Vent Sizes 2 in. X 4 in. 3 in. X 5 in.
Vent Lengths 65  (20 m) 150  (46 m)
Vent Sizes 2 in. (51 mm) 3 in. (76 mm)
Vent Lengths 65  (20 m) 150  (46 m)
Twin Pipe
Concentric
Commercial Tankless
Rack Systems
Demand Duo™
Commercial Hybrid System
C
US