Specification
Rinnai Corporation • 103 International Drive • Peachtree City, GA 30269 • Toll-Free: 1-800-621-9419 • Fax: 678-364-8643 • www.rinnai.us
RUS75e (KCM2528W)
DIMENSIONS
DIM Inches (mm)
A (GAS) 1.3 (33.2)
A (COLD) 1.93 (49)
A (HOT) 1.35 (34.4)
A
(CONDENSATE
OUTLET)
0.94 (23.9)
B 3.93 (100)
C 1.91 (48.6)
DIM Inches (mm)
D 0.09 (2.2)
E 5.6 (142.3)
F 3.24 (82.4)
G 3.99 (101.4)
H 1.58 (40.1)
I 3.17 (80.4)
J 18.3 (466)
Heat exchanger: 12 years* for residential, 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.
Limited
Warranty
WEIGHT: 57.3 lb (26 kg)
MC-91-2US (optional maximum of 4 can be installed)
Do not install MC-100V-1US or BC-100V-1US
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)
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 2.97” W.C. (7.4mbar) low fire 0.89” W.C. (2.2mbar)
Propane Gas: high fire 3.49” W.C. (8.7mbar) low fire 0.96” W.C. (2.4mbar)
Complies with South Coast Air Quality Management District 14 ng/J or 20 ppm
NOx emission levels
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)
Controller (Optional)
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
D
I
H
B
C
E
F G
J
18.5
(470)
9.4
(238)
0.44
(11.1)
4.6
(117.3)
10.1 (257)
28.4 (721.4)
25.7 (653.2)
8.73 (221.8)
0.4 (10.1)
18.5 (470)
9.4 (238)
0.44 (11.1)
4.6 (117.3)
A