Rinnai RSC199i Internal Indoor Condensing Tankless Water Heater Owner’s Manual

Rinnai RSC199i Internal Indoor Condensing Tankless Water Heater

CIRC-LOGIC RECIRCULATION TECHNOLOGY

Rinnai Circ-Logic recirculation technology allows users to set recirculation patterns that coincide with their hot water usage patterns. Hot water is available when needed, without the expense of circulating it during times of inactivity. Two recirculation modes are available:

• Dedicated Mode – With a dedicated return line, the integrated pump recirculates water from the tankless water heater through the return line and back to the heater.
• Crossover Mode – In applications where a dedicated return line is not available or is difficult to install, Circ-Logic technology allows for the simple installation of a Thermal Bypass Valve (included with purchase) at the fixture farthest away from the water heater.
  

Intelligent Recirculation”

• Intelligent Recirculation “learns” users’ hot water patterns to schedule recirculation.

EASE OF INSTALLATION AND SERVICEABILITY

• Compact Design to Save Space
• Wi-Fi Technology for Remote Monitoring and Management
• Simple Gas Conversion

(WITH INTEGRATED RECIRCULATION PUMP)

SUPER-HIGH-EFFICIENCY (CONDENSING) TANKLESS WATER HEATER

Installation Type| Internal (Indoor) Applications
Model Numbers| RSC199i (REU-NP3237FF-US(A)) RSC160i (REU-NP2530FF-US(A))
Approved Gas Types| Natural and Propane
Efficiency| UEF: 0.95
High Altitude Approved| Ratings not certified by AHRI    EF : 0.96
Water Flow Control| Up to 10,200 ft (3,109 m)
Water Flow Control| Water Flow Sensor, Electronic Water Control and Bypass Control
Certifications| Standard : MC-91-2US Required for scheduled Recirculation: MC-195T-US or control·r™ Wi-Fi Module
Warranty| AHRI, ANSI Z21.10.3, CSA 4.3, and ENERGY STAR®
Warranty

• Heat Exchanger: 15 years or 12,000 operation hours, whichever occurs first
• All Other Parts and Components: 5 Years
• Reasonable Labor: 1 Year

Safety Devices
Flame Failure – Flame Rod, Boiling Protection, Combustion Fan RPM Check, Over Current – Glass Fuse, Remaining Flame (OHS) and Automatic Frost Protection
Included with Purchase
Tankless Water Heater, Thermal Bypass Valve, Pressure Relief Valve and Adapter, Isolation Valve Kit, Integrated Controller
Additional Features

• Complies with South Coast Air Quality Management District 14 ng/J or 20 ppm NOx Emission Levels
• Ultra Low NOx
• Tankless Rack System™ Compatible
• 1/2 in. (13 mm) Gas Line Compatible

OPTIONAL ACCESSORIES

Room Air Screen, Condensate Neutralizer, ScaleCutter, Drain Down Kit, Additional Controllers, Pipe Cover, Recirculation Pump, DPS/MIS Switch, EZConnect™ Cables, Wireless Accessories, and many more. Visit rinnai.us for a complete list of accessories.

SENSEITM TECHNICAL SPECIFICATIONS

mm)
Minimum Gas Consumption Btu/h| 15,000
Maximum Gas Consumption Btu/h| 199,000| 160,000
Flow Rate1 (Min – Max)| 0.26 – 9.8 GPM (1.0 – 37 L/min)| 0.26 – 8.0 GPM (1.0 – 30 L/min)
Max Flow Rate with Parameter Adjustment| 11 GPM (42 L/min)| 9 GPM (34 L/min)
Weight| 68 lb (31 kg)| 66 lb (30 kg)
Sound Level| 53 dB| 52 dB
Electrical| Normal| 78 W| 57 W
Standby| 2.3 W
Freeze Protection| 150 W
Max Current| 4 Amps
Fuse| 10 Amps
Temperature|

• Minimum: 98° F (37° C) Default 120° F (49° C) Crossover Mode
• Maximum: 120° F (49° C) Default 140° F (60° C) With Parameter Adjustment

By-Pass Flow Control| Electronic
Gas Supply Pressure 2|

• Natural: 3.5 in. w.c. – 10.5 in. w.c.
• Propane: 8.0 in. w.c. – 13.5 in. w.c.

Ignition System| Direct Electronic Ignition
Electronic Connections|

• Appliance: AC 120 Volts, 60Hz.
• Temperature Controller: DC 12 Volts (Digital)

Water Supply Pressure|

• Minimum: 50 PSI (Recommended 60-80 PSI for max performance)
• Maximum: 150 PSI

Controller Cable| Non-Polarized Two Core Cable (Minimum 22 AWG)
Service Connections|

• Gas Supply: 3/4 in. (19 mm) NPT
• Cold Water Inlet : 3/4 in. (19 mm) NPT
• Hot Water Outlet : 3/4 in. (19 mm) NPT
• Condensate Drain: 1/2 in. (13 mm) NPT

Clearances|

• Top: 2 in. (51 mm)*

• Back: 0 in.

• Bottom/Ground: 12 in. (305 mm)

• Sides: 2 in. (51 mm)***

• Front: 0 in.**

• Front Exhaust: 24 in. (610 mm)

• 0 in. from vent components
  ** Clearance for servicing is 24 in. (610 mm) in front of water heater
  *** Add 0.25 in. (6.35 mm) for recess box

1 Minimum flow may vary slightly depending on the temperature setting and the inlet water temperature.
Minimum activation flow is 0.4 GPM (1.5 L/min).
2 The maximum gas supply pressure must not exceed the value specified by the manufacturer.

SENSE™ WATER FLOW CURVE

Flow curves apply only to incoming water temperatures of 70° F (21° C) or less.
For incoming water temperatures greater than 70° F (21° C), please contact Rinnai.

SENSEI™ DIMENSIONS

in. (mm)

FRONT

SIDE

Vent Connection: 2 in. (51 mm) nominal PVC/ Polypropylene or 3 in./5 in. Concentric.
BOTTOM

SENSEI™ PUMP PERFORMANCE AND PUMP + TANKLESS PERFORMANCE CURVE

Recirculation Pump Control

• Smart-Circ™ “learns” users’ hot water patterns to activate recirculation.
• Manual schedule selection is available with Accessory controllers (MC-195T or controller™ Wi-Fi module)

Internal Multi-Speed DC Pump

Integrated pump allows for recirculation through a dedicated return line or crossover with thermal bypass valve.

Maximum Recirculation Pipe Lengths

• 400 equivalent feet for 3/4 in. pipe diameter
• 100 equivalent feet for 1/2 in. pipe diameter
  Take equivalent elbow lengths into consideration when calculating pipe length.
  For dedicated return lines: Total length includes both hot water supply and dedicated return lines.
  Cross-over mode: Total length includes both hot water supply and cold water piping length from the tankless water heater to the thermal bypass valve. Cross-over mode requires the use of a thermal bypass valve (included).

Rinnai America Corporation
• 103 International Drive, Peachtree City, GA 30269
• 1 800-621-9419
• rinnai.us ©2022 Rinnai America Corporation. Rinnai America Corporation continually updates materials, and as such, content is subject to change without notice.
Local, state, provincial, federal and national fuel gas codes must be adhered to prior to and upon installation.

References

• #1 Selling Tankless Water Heater in the US | Rinnai

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