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2520FFUC SP-1 

C53i (2520FFUC)    

Type of Appliance 

Rinnai model number 

Operation 

Exhaust system  

Minimum/Maximum Gas Rate (Input) 

Electrical 

 
Electrical Consumption 

 
 
Ignition System 

Hot Water Capacity 

Temperature 

Temperature (without remote)  

Approved Gas Types 

Installation 

Energy Factor 

Thermal Efficiency 

Service Connections 

 
 
Water Flow Control 

Minimum/Maximum Water Supply Pressure 

Temperature controlled, continuous flow, gas hot water system 

REU-V2520FFUC-US 

With or without remote controls, mounted in kitchen, bathroom, etc. 

Direct vent, forced combustion 

15,000 - 180,000 BTU/h (Natural Gas or Propane) 

Appliance: 

 

 

AC 120 Volts - 60 Hz 

Remote Control: 

 

DC 12 Volts 

Normal 

   75 

watts 

Standby   5.5 

watts 

Anti-frost protection 

 

100 watts 

Direct electronic ignition 

0.6 to 5.3 GPM (50° F rise) 

0.6 to 5.3 GPM (35° F rise) 

120° - 185° F  

140° F (factory default) 

Natural or Propane (ensure unit matches gas type) 

Indoor only 

Natural Gas: 0.81 

 

Propane: 0.81 

Natural Gas: 84% 

 

Propane: 84% 

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

Water flow sensor, electronic water control device, no bypass 

20 - 150 PSI (50 PSI or above is recommended for maximum flow) 

2520FFUC SP-1                           12/2006 

FLOW TABLE 

Water Flow Capacity Curves 

(For 1 to 5 units manifolded in parallel) 

© 2005 Rinnai Corporation 

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