Rinnai Water Heater RU80E User Guide

RU80e (KB2530WD)  
Condensing, Tankless, Temperature controlled, continuous flow,  
gas hot water system, Energy Star Qualified  
Type of Appliance  
REU-KB2530WD-US  
Rinnai model number  
Operation / Installation  
Minimum/Maximum Gas Rate (Input)  
Electrical  
Forced combustion; outdoor only  
15,200 - 152,000 BTU/h  
Appliance:  
AC 120 Volts - 60 Hz  
DC 12 Volts  
Temperature Controller:  
Normal: 41 w Standby: 2 w Anti-frost protection: 168 w  
Direct electronic ignition  
Electrical Consumption  
Ignition System  
Minimum flow rate: 0.26 GPM  
Minimum activation flow rate: 0.4 GPM  
Maximum flow rate: 8.0 GPM  
Hot Water Capacity  
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  
Temperature  
120° F (factory default) or 140° F  
Temperature (without remote)  
Approved Gas Types  
Energy Factor (EF)  
Natural or Propane (ensure unit matches gas type)  
Natural Gas: 0.96  
Propane: 0.96  
Gas supply: 3/4 inch MNPT  
Service Connections  
Cold water inlet: 3/4 inch MNPT  
Hot water outlet: 3/4 inch MNPT  
Isolation & Pressure Relief Valves Included 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)  
Water Flow Control  
Minimum/Maximum Water Supply Pressure  
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.  
10.0  
9.0  
8.0  
7.0  
6.0  
5.0  
4.0  
3.0  
2.0  
1.0  
0.0  
0
25  
50  
75  
100  
125  
150  
delta T - Temperature Rise (ºF)  
RU80e SP  
3/2012  
© 2012 Rinnai Corporation  
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