Rinnai RU80E, REU-KB2530WD-US User Manual
RU80e (KB2530WD)
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
Condensing, Tankless, Temperature controlled, continuous flow,
gas hot water system, Energy Star Qualified
REU-KB2530WD-US
Forced combustion; outdoor only
15,200 - 152,000 BTU/h
Appliance: AC 120 Volts - 60 Hz
Temperature Controller: DC 12 Volts
Normal: 41 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: 8.0 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: 0.96 Propane: 0.96
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 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.
FLOW TABLE
© 2012 Rinnai Corporation
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
Water Flow (gpm)
2.0
1.0
0.0
0 25 50 75 100 125 150
RU80e SP 3/2012
Water flow sensor, electronic water control and by-pass control
15 - 150 PSI (50 PSI or above is recommended for maximum flow)
delta T - Temperature Rise (ºF)
RU80e (KB2530WD)
Controller
Controller Cable
Safety Devices
Clearances from Combustibles
Clearances from Non-combustibles
* 24 inches required for serviceability
Min. / Max. Gas Supply Pressure
Manifold Gas Pressure (inches W.C.)
NOx
MC-91-2 (included)
Deluxe controller: MC-100V-1US (optional)
Bathroom controller: BC-100V-1US (optional)
MCC-91-2 (optional; for hydronic and commercial applications)
Non-polarized two-core cable, minimum 22 AWG
• Flame failure - Flame Rod
• Boiling protection
• Combustion fan rpm check
• Over current - glass fuse
• Top of heater - 12 inches
• Front (Panel) - 24 inches
• Front (Exhaust) - 24 inches
• Top of heater - 2 inches
• Front (Panel) - 0 inches *
• Front (Exhaust) - 24 inches
• Remaining flame (OHS)
• Thermal fuse
• Automatic frost protection
• Back of heater - 0 inches
• Bottom of heater - 12 inches
• Sides of heater - 6 inches
• Back of heater - 0 inches
• Bottom of heater - 2 inches
• Sides of heater - 1/8 inch
Natural Gas: min 5” W.C. max 10.5” W.C.
Propane Gas: min 8” W.C. max 13.5” W.C.
Natural Gas: high fire 1.9” W.C. low fire 0.46” W.C.
Propane Gas: high fire 2.1” W.C. low fire 0.50” W.C.
Complies with South Coast Air Quality Management District 14 ng/J or
20 ppm NOx emission levels
Limited
Warranty
DIMENSIONS
0.6 (15) 2.0 (50)
Heat exchanger: 12 years* for residential, 10 years for residential and space heating, and 5 years* for
commercial; All other parts: 5 years*; Labor: 1 year;
(* 3 years if used as a circulating water heater within a circulation loop, when the water heater is in
series with a circulation system and all circulating water flows through the water heater, and where an
aquastat / thermostat, timer, or an on-demand recirculation system is not incorporated.)
Refer to the manual for complete warranty information.
WEIGHT: 70.5 lb (32 kg)
18.5 (470)
10.0 (253.8)
0.4 (10.1) 0.6 (15)
10.1 (257.5)
8.7 (222) A
C
B
D
E
DIM Inches (mm)
25.7 (654)
28.4 (721.6)
A (GAS) 1.6 (40.2)
A (COLD) 2.0 (50.2)
A (HOT) 1.6 (41.2)
A (CONDENSATE
OUTLET)
B 5.0 (127.2)
C 1.9 (47.8)
D 0.52 (13.3)
0.9 (22.4)
H
G
F
K
DIM Inches (mm)
E 2.2 (56.3)
F 2.3 (58.3)
G 5.0 (127.2)
H 2.0 (50)
I 3.0 (76)
J 7.1 (179)
K 18.3 (466)
J
I
Rinnai Corporation • 103 International Drive • Peachtree City, GA 30269 • Toll-Free: 1-800-621-9419 • Fax: 678-829-1666 • www.rinnai.us
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