Specification Sheet

Type of Appliance
Rinnai model number
Operation / Installation
Minimum/Maximum Gas Rate (Input)
Electrical
Electrical Consumption
Amperage
Ignition System
Hot Water Capacity
Temperature
Temperature (without remote)
Approved Gas Types
Thermal Efficiency
Service Connections
Isolation & Pressure Relief Valves Included
Water Flow Control
Minimum/Maximum Water Supply Pressure
Commercial Condensing Tankless Water Heater,
Commercial Energy Star
REU-KBD3237FFUDC-US
Forced combustion; indoor only;
15,200 - 199,000 BTU/h (4.5-58.3 kWh)
Appliance: AC 120 Volts - 60 Hz
Temperature Controller: DC 12 Volts
Normal: 75 w Standby: 2 w Anti-frost protection: 146 w
Max: 4A
Direct electronic ignition
Minimum flow rate: 0.26 GPM (1 l/min)
Minimum activation flow rate: 0.4 GPM (1.5 l/min)
Maximum flow rate: 9.8 GPM (37.1 l/min)
Factory Default Range - 98°-120° F (37°- 49°C)
Optional Range - 98° - 185° F (37°- 85°C)
120° F 49°C) (factory default) or 140° F (60°C)
Natural or Propane (ensure unit matches gas type)
Natural Gas: 96% Propane: 96%
Gas supply: 3/4 inch (19mm) MNPT
Cold water inlet: 3/4 inch (19mm) MNPT
Hot water outlet: 3/4 inch (19mm) MNPT
Isolation Valves are certified to NSF/ANSI 61 for potable water
Water flow sensor, electronic water control and by-pass control
20 - 150 PSI (138-1035 KPa) ( recommended 60 - 80 PSI (414 - 552
KPa) for optimal performance)
C199i (KBD3237FFUDC)
Rinnai is continually updating and improving products; therefore, specifications are subject to change without prior
notice. Local, state, provincial and federal codes must be adhered to prior to installation.
FLOW TABLE
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
0 25 50 75 100 125 150
kA3237
Water Flow gpm (l/min)
delta T - Temperature Rise ºF (ºC)
(37.9)
10.0
(34.1)
(11.4)
(7.6)
(3.8)
(26.5)
(30.3)
(19.0)
(22.7)
(15.1)
0.0
9.0
8.0
2.0
1.0
6.0
7.0
4.0
5.0
3.0
25 (13.9) 50 (27.8) 75 (41.6) 100 (55.6) 125 (69.4) 150 (83.3)
© 2015 Rinnai Corporation
C199i-SP 6/2015
SANITATION
C US
Low Lead Content
NSF/ANSI 372