Rinnai RUCS75iP Specification

RUCS75iP
Rinnai
Brand
Rinnai
Model
RUCS75iP
Type
Specification

This manual is also suitable for

Rinnai RUCS75iP is a top-of-the-line tankless water heater, providing endless hot water for your home. With an impressive flow rate of up to 7.5 GPM, it can easily handle multiple showers, dishwashers, and washing machines simultaneously. The unit is also Energy Star qualified, helping you save on utility bills. Equipped with advanced safety features like flame failure protection and over current protection, you can have peace of mind knowing your home is safe.

Rinnai RUCS75iP is a top-of-the-line tankless water heater, providing endless hot water for your home. With an impressive flow rate of up to 7.5 GPM, it can easily handle multiple showers, dishwashers, and washing machines simultaneously. The unit is also Energy Star qualified, helping you save on utility bills. Equipped with advanced safety features like flame failure protection and over current protection, you can have peace of mind knowing your home is safe.

Type of Appliance
Rinnai model number
Operation / Installation
Minimum/Maximum Gas Rate (Input)
Electrical
Electrical Consumption
Amperage
Ignition System
Hot Water Capacity
Temperature (with remote)
Temperature (without remote)
Approved Gas Types
Uniform Energy Factor (UEF)
Service Connections
Water Flow Control
Minimum/Maximum Water Supply Pressure
High Altitude Capability
Condensing, Tankless, Temperature controlled, continuous flow,
gas hot water system, Energy Star Qualified
REU-KCM2528FFU-US
Forced combustion; indoor only; Certified for installation in
Manufactured (Mobile) Homes
10,300 - 160,000 BTU/h
Appliance: AC 120 Volts - 60 Hz
Temperature Controller: DC 12 Volts
Normal: 89 w Standby: 1.3 w Anti-frost protection: 167 w
Max: 2.3A 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: 7.5 GPM (28.4 l/min)
120° - 140° F (49°- 60°C)
120° F (49°C), 125° F (49°C), 135° F (57°C), or 140° F (60°C)
Natural or Propane (ensure unit matches gas type)
0.90
Gas supply: 3/4 inch (19mm) MNPT
Cold water inlet: 3/4 inch (19mm) MNPT
Hot water outlet: 3/4 inch (19mm) MNPT
Water flow sensor, electronic water control and fixed by-pass
50 - 150 PSI (345-1035 KPa) ( recommended 60 - 80 PSI (414 - 552
KPa) for optimal performance)
Up to 5,400 ft (1646 m) elevation above sea level
FLOW TABLE
RUCS75i (KCM2528FFU)
Water Flow gpm (l/min)
delta T - Temperature Rise ºF (ºC)
© 2017 Rinnai Corporation
RUCS75i-SP-2 5/2017
SANITATION
C US
Low Lead Content
NSF/ANSI 372
25 (13.9) 50 (27.8) 75 (41.6) 100 (55.6) 125 (69.4) 150 (83.3)
(37.9)
10.0
(34.1)
(26.5)
(30.3)
(19.0)
(22.7)
(15.1)
0.0
9.0
8.0
(7.6)
2.0
(3.8)
1.0
6.0
7.0
4.0
5.0
(11.4)
3.0
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.
Rinnai Corporation • 103 International Drive • Peachtree City, GA 30269 • Toll-Free: 1-800-621-9419 • Fax: 678-364-8643 • www.rinnai.us
RUCS75i (KCM2528FFU)
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 - 6 inches (152mm)
Front of heater - 6 inches *(152mm)
Sides of heater - 2 inches (51mm)
Top of heater - 2 inches (51mm)
Front of heater - 6 inches *(152mm)
Sides of heater - 1/2 inches (13mm)
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 3.37” W.C. (8.4mbar) low fire 1.00” W.C. (2.5mbar)
Propane Gas: high fire 3.75” W.C. (9.3mbar) low fire 1.08” W.C. (2.7mbar)
Complies with South Coast Air Quality Management District 14 ng/J or 20 ppm
NOx emission levels
Direct Vent system designed for use with Ubbink Polypropylene Concentric
Vent, Twin Pipe PVC/CPVC (3” and 4” configurations), or Centrotherm 3”
Polypropylene (with Centrotherm Twin Pipe Adapter) See installation and operation
manual for details regarding installation and allowed vent lengths.
Remaining flame (OHS)
Thermal fuse
Automatic frost protection
Back of heater - 0 inches
Bottom of heater - 12 inches (305mm)
From vent pipe - 0 inches
Back of heater - 0 inches
Bottom of heater - 12 inches (305mm)
From vent pipe - 0 inches
Controller (Optional)
Controller Cable
Safety Devices
Clearances from Combustibles
* 24 inches (610mm) required for service
Clearances from Non-combustibles
* 24 inches (610mm) required for service
Min. / Max. Gas Supply Pressure
Manifold Gas Pressure (inches W.C.)
NOx
Venting
D
I
H
B
C
E
F G
J
ø 5.5 (140.2)
31.1 (789.6)
2 (50.6)
1.2 (30.7)
5.9 (150)
10.1 (257)
28.5 (723)
25.7 (653.2)
8.73 (221.8)
A
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Rinnai RUCS75iP Specification

RUCS75iP
Rinnai
Brand
Rinnai
Model
RUCS75iP
Type
Specification
This manual is also suitable for

Rinnai RUCS75iP is a top-of-the-line tankless water heater, providing endless hot water for your home. With an impressive flow rate of up to 7.5 GPM, it can easily handle multiple showers, dishwashers, and washing machines simultaneously. The unit is also Energy Star qualified, helping you save on utility bills. Equipped with advanced safety features like flame failure protection and over current protection, you can have peace of mind knowing your home is safe.

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