Rinnai RU98e (REU-KB3237WD-US) Specification Sheet

Rinnai Water Heater Specification Sheet - RU98e (REU-KB3237WD-US).
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Type of Appliance 

 
Rinnai model number 

Operation / Installation 

Minimum/Maximum Gas Rate (Input) 

Electrical 

 
Electrical Consumption 

Ignition System 

Hot Water Capacity 

 
 
Temperature 

 
 
Temperature (without remote)  

Approved Gas Types 

Energy Factor (EF) 

Service Connections 

 
 
Isolation & Pressure Relief Valves Included 
 

Water Flow Control 

Minimum/Maximum Water Supply Pressure 

Condensing, Tankless, Temperature controlled, continuous flow, 
gas hot water system, Energy Star Qualified 

REU-KB3237WD-US 

Forced combustion; outdoor only 

15,200 - 199,000 BTU/h 

Appliance: 

 

 

AC 120 Volts - 60 Hz 

Temperature Controller:  

DC 12 Volts 

Normal:  63 w  Standby:  2 w  Anti-frost protection:  168 w 

Direct electronic ignition 

Minimum flow rate: 0.26 GPM 
Minimum activation flow rate: 0.4 GPM 
Maximum flow rate: 9.8 GPM 

98° - 120° F  (factory default)  Maximum temperature is selectable at 
120° F or at 140° F;  98° - 185° F available with the MCC-91-2 
controller for commercial and hydronic applications 

120° F (factory default) or 140° F 

Natural or Propane (ensure unit matches gas type) 

Natural Gas: 0.95 

 

Propane: 0.95 

Gas supply: 3/4 inch MNPT 
Cold water inlet: 3/4 inch MNPT 
Hot water outlet: 3/4 inch MNPT 

Heavy duty forged brass Webstone Isolator valves EXP E2, certified 
to NSF/ANSI 61-8 for potable water 

Water flow sensor, electronic water control and by-pass control  

15 - 150 PSI (50 PSI or above is recommended for maximum flow) 

© 2012 Rinnai Corporation 

RU98e SP                            3/2012 

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

Water Flow (gpm) 

delta T - Temperature Rise (ºF) 

RU98e (KB3237WD)  

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. 

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