Rinnai Water Heater RU98eN Specifications
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
RU98e (KB3237WD)
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
Condensing, Tankless, Temperature controlled, continuous flow,
gas hot water system, Energy Star Qualified
REU-KB3237WD-US
Forced combustion; outdoor only; Certified for installation in
Manufactured (Mobile) Homes
15,200 - 199,000 BTU/h (4.5-58.3 kWh)
Appliance: AC 120 Volts - 60 Hz
Temperature Controller: DC 12 Volts
Normal: 71 w Standby: 2 w Anti-frost protection: 168 w
Max with pump: 8A Max without pump: 4A Fuse: 10A
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)
98° - 120° F (37°- 49°C) (factory default) Maximum temperature is
selectable at 120° F (49°C) or at 140° F (60°C); 98° - 185° F
(37°- 49°C) available with the MCC-91-2 controller for commercial
and hydronic applications
120° F (49°C) (factory default) or 140° F (60°C)
Natural or Propane (ensure unit matches gas type)
Uniform Energy Factor (UEF)
Service Connections
Isolation & Pressure Relief Valves Included
Water Flow Control
Minimum/Maximum Water Supply Pressure
0.92
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
50 - 150 PSI (345-1035 KPa) ( recommended 60 - 80 PSI (414 - 552
KPa) for optimal performance)
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.
(37.9)
FLOW TABLE
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
(34.1)
(30.3)
(26.5)
(22.7)
(19.0)
(15.1)
(11.4)
(7.6)
Water Flow gpm (l/min)
(3.8)
1.0
0.0
25 (13.9) 50 (27.8) 75 (41.6) 100 (55.6) 125 (69.4) 150 (83.3)
delta T - Temperature Rise ºF (ºC)
© 2017 Rinnai Corporation
RU98e-SP(03) 5/2017
C US
Low Lead Content
NSF/ANSI 372
SANITATION
RU98e (KB3237WD)
External Recirculation Pump Control Built in Rinnai Circ-Logic™ : Recirculation program cycles external pump
Controller
Controller Cable
Safety Devices
Clearances from Combustibles
Clearances from Non-combustibles
* 24 inches (610mm) required for service
Min. / Max. Gas Supply Pressure
Manifold Gas Pressure (inches W.C.)
NOx
MC-91-2US (included)
Deluxe controller: MC-100V-1US (optional)
Bathroom controller: BC-100V-1US (optional)
MCC-91-2US (optional; for hydronic and commercial applications)
MC195T-US (optional; for use with Re-Circ Logic)
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 (305mm)
Front (Panel) - 24 inches (610mm)
Front (Exhaust) - 24 inches (610mm)
Top of heater - 2 inches (51mm)
Front (Panel) - 0 inches *
Front (Exhaust) - 24 inches (610mm)
Remaining flame (OHS)
Thermal fuse
Automatic frost protection
Back of heater - 0 inches
Bottom of heater - 12 inches (305mm)
Sides of heater - 6 inches (152mm)
Back of heater - 0 inches
Bottom of heater - 2 inches (51mm)
Sides of heater - 1/8 inch (3.2mm)
Natural Gas: min 4” W.C. (2.5mbar) max 10.5” W.C. (26.1mbar)
Propane Gas: min 8” W.C. (20mbar) max 13.5” W.C. (33.6mbar)
Natural Gas: high fire 3.0” W.C. (7.5mbar) low fire 0.41” W.C. (1.0mbar)
Propane Gas: high fire 3.5” W.C. (8.7mbar) low fire 0.46” W.C. (1.2mbar)
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: 61 lb (28 kg)
18.5 (470)
10.0 (253.8)
0.4 (10.1) 0.6 (15)
10.1 (257.5)
8.7 (222)
C
B
D
E
DIM Inches (mm)
25.7 (654)
28.4 (721.6)
A
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: 678-364-8643 • www.rinnai.us
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