CONDENSING BOILERS - E SERIES
Simply Smart Engineering
AN ECONOMICAL SOLUTION FOR HEATING
AND HOT WATER
The E Series–Combi
The compact, wall-mounted design can be easily
installed as a retrofit application to replace traditional,
less efficient boilers, or provide simple, space-saving
solutions in a new construction project. These boilers
offer an on-board energy management system that
provides more consistent, comfortable heat, all while
saving energy.
PRODUCT FEATURES
Wide Range of Options
• E Series includes 3 combi models (50 MBH,
75 MBH and 110 MBH) sized to meet specific
load demand
• Natural Gas and Propane models available
Engineered Performance
• Awarded the ENERGY STAR® Most Efficient Mark
in 2016 – up 95.5% AFUE
• Self-cleaning Stainless Steel heat exchanger
with counter flow design increases condensing
operations even during full load
Included Accessories
• Factory assembled low-loss header
(E75C/E110C) with:
– Isolation Valves
– Drain Valves
– Unions
– Pressure and Temperature Gauge
– ASME approved Pressure Relief Valve
– Insulation Cover
• Integrated Expansion Tank for convenience
(E75C/E110C)
• 3/5" Concentric Adapter
• 3" PP to PVC Two-Pipe Adapters
• Outdoor Reset Sensor
E Series Condensing Boilers
3
EASE OF INSTALLATION AND SERVICEABILITY.
2
• Plug-and-play wiring with color-coded terminal strip and connectors
• On-board, 6-button control with intuitive display of boiler temperature, pressure and other sequence of operation information, making servicing
and commissioning easier
• Quarter-turn locking pins allow easy access to condensate collector and
burner cassette, tool-less igniter/electrode inspection and/or replacement; 2-year, 4,000-hour visual inspection and 4-year, 8,000-hour service interval
1
4
5
6
• Easy access from front, left and right sides to all serviceable components
7
• Installation flexibility allows venting up to a total of 100 feet (concentric
or two-pipe)
8
• Common components and sensors across all Rinnai boilers reduce
spare parts and complexity
E SERIES CONDENSING BOILERS
COMBI MODELS
Models
E50C
E75C
Dimensions - w, h, d
Inches (mm)
Weight* (lbs/kg)
Fuel Type
E110C
19.7 x 25.6 x 15.6 (500 x 650 x 395)
85 lbs (39 kg)
92 lbs (42 kg)
NG
(field convertible)
110 lbs (50 kg)
NG or LP (field convertible)
Max. Heating Capacity (MBH)
48 (14 kW)
72 (21 kW)
106 (31 kW)
Min. Input (MBH)
13.6 (4 kW)
13.6-NG / 37-LP
(4 kW-NG /
11 kW-LP)
26-NG / 59-LP
(8 kW-NG /
17 kW-LP)
Max. Input (MBH-DHW)
85 (25 kW)
85 (25 kW)
130 (38 kW)
Max. Input (MBH-Heating)
50 (15 kW)
75 (22 kW)
110 (32 kW)
3.7:1
5.5:1
4.2:1
Turn Down Ratio (NG)
DHW Activation Rate
GPM (LPM)
0.5 GPM (2 LPM)
Max. DHW ΔT @ 75° F (41° C)
2.1 GPM (8.0 LPM)
2.1 GPM (8.0 LPM)
3.2 GPM (12.2 LPM)
Max. DHW ΔT @ 60° F (33° C)**
2.6 GPM (9.9 LPM)
2.6 GPM (9.9 LPM)
4.0 GPM (15.2 LPM)
Max. DHW ΔT @ 45° F (25° C)**
3.5 GPM (13.3 LPM)
3.5 GPM (13.3 LPM)
5.4 GPM (20.5 LPM)
95.6%
95.5%
95.5%
AFUE Rating
Circulating Pump
3-Speed
Approved Venting Material
Warranty†
Polyproplyene, Stainless Steel, PVC, CPVC, Concentric
Standard Warranty (some restrictions apply): Residential: 12-year heat exchanger, 2-year parts,
1-year labor. Commercial: 5-year heat exchanger, 2-year parts, 1-year labor.
Certifications
ENERGY STAR®, CSA, NB, ASME H, SCAQMD, Low Lead
† For complete information and details regarding Rinnai’s warranty, visit rinnai.us.
* Dry weight
** With mixing valve
Rinnai America Corporation • 103 International Drive, Peachtree City, GA 30269
Phone: 678-829-1700 • rinnai.us
©2016 Rinnai America Corporation. Rinnai is continually updating and improving products; therefore, specifications are subject to change
without prior notice. Local, state, provincial, federal and national fuel gas codes must be adhered to prior to and upon installation.
➊Gas valve
➋Fan
➌Exhaust/Intake
➍Stainless Steel
Heat Exchanger
➎DHW Plate Heat
Exchanger
➏Boiler Pump
➐Three-Way Motorized
Valve Allows Boiler
to Switch Between
Heating and DHW
➑Expansion Tank