Dimensions Guide

SUPER-HIGH-EFFICIENCY (CONDENSING) TANKLESS WATER HEATER
Installaon Type
Internal (Indoor) Residenal
Applicaons; Cered for installaon in
Manufactured (Mobile) Homes
Model Number RUCS75i (REU-KCM2528FFU-US)
Approved Gas Types Natural and Propane
High Altude Approved Up to 5,400 . (1,646 m)
Water Flow Control
Water Flow Sensor, Electronic Water
Control and Fixed Bypass Control
UEF: 0.90
Eciency
Rangs not cered
by AHRI
EF: 0.93
Controller
Standard: Status Monitor
Oponal: MC-91-2US,
control·r™ Wi-Fi Module
Do not install MC-100V-1US or
BC-100V-1US
Cercaons
AHRI, ANSI Z21.10.3, CSA 4.3, and
ENERGY STAR®
Warranty
• Heat Exchanger: 12 years* for residenal
• All Other Parts and Components: 5 Years*
• Reasonable Labor: 1 Year
* 3 years if used as a circulaon water heater within a circulaon
loop when the water heater is in series with a circulaon system
and all circulang water ows through the water heater, and
where an aquastat/thermostat, mer, or an on-demand
recirculaon system is not incorporated. Refer to the Tankless
Water Heater Installaon and Operaon manual for complete
warranty informaon.
Safety Devices
Flame Failure - Flame Rod, Boiling Protecon, Combuson Fan RPM
Check, Over Current - Glass Fuse, Remaining Flame (OHS), Thermal Fuse
and Automac Frost Protecon
Included with Purchase
Tankless Water Heater and Self-Tapping Screws (x2)
Addional Features
• Complies with South Coast
Air Quality Management
District 14 ng/J or 20 ppm
NOx Emission Levels
●
The RUCS75i oers concentric polypropylene (PP) or dual-pipe
PVC/CPVC/PP venng opons on the same model. The dual
venng conguraon on the top allows for maximum exibility
for installers and dealers—one concentric vent or two
PVC/CPVC/PP pipes can be used for venng.
Designed for use with:
• Ubbink Polypropylene Concentric Vent
• Twin Pipe PVC/CPVC (3 in. and 4 in. conguraons)
• Centrotherm 3 in. Polypropylene (with Centrotherm
Twin Pipe Adapter)
Concentric PP 41 . (12.5 m)
Dual Pipe PP
(Centrotherm)
41 . (12.5 m)
3 in. Twin Pipe 41 . (12.5 m)
4 in. Twin Pipe
PVC/CPVC/PP
100 . (30.5 m)
• Ultra Low NOx
• Wi-Fi Capable
• 1/2 in. (13 mm) Gas Line Compable
C
US