Stop planning your evenings and mornings around your water heater. Now, you can set your own schedule, all thanks to the RU98eN. It delivers up to 9.8 gallons of hot water per minute while saving energy and money.
Features
• ENERGY STAR Qualified
• Propane and natural gas models available
• Compatible with a full range of Rinnai digital controllers
• Enhanced scale detection lessens the possibility of serious, long-term damage
• Temperature lock function prevents unauthorized or accidental changes to water temperature
• Complies with South Coast Air Quality Management District 14 ng/J or 20 ppm NOx emission levels
• Built-in Rinnai Circ-Logic recirculation system cycles the external pump at pre-set temperatures and intervals to maximize comfort and efficiency
Warranty
 |
Item |
Years of Coverage (from purchase date)
|
Residential use
|
Residential and space heating
|
Commercial use
|
| Heat exchanger |
12 |
10 |
5 |
| All other parts |
5 |
5 |
5 |
| Reasonable labor* |
1 or 5 |
1or 5 |
1 or 2 |
| * Extended labor warranty avaiable the unit is registered with Rinnai within 30 days of purchase. |
Click here for more information about the warranty.
Temperature rise (or delta T) in ºF at various flow rates
Feature Table
|
Model*
|
Capacity |
Input BTUs
in thousands
|
Hot Water Capacity
in gallons per minute
(GPM)
|
Energy
Factor
|
Energy Use
|
Temperature Settings
|
|
Normal,
Standby,
Anti-Frost
|
Min
|
Max
|
Activation |
Min |
Max |
Indoor
model |
Outdoor
model
|
Residential
|
Commercial**
|
| Value Series - Value and comfort for small to medium homes |
V53eN
V53eP |
  |
19
(N)
20.2
(P) |
120 |
0.6 |
0.6 |
5.3 |
0.82
|
55 Watts,
2 Watts,
184 Watts |
33 Watts,
2 Watts,
74 watts |
120°F - 140°F |
Residential only |
V65iN
V65iP
V65eN
V65eP |
|
10.3 |
150 |
0.4 |
0.26 |
6.6 |
0.82 |
76 Watts,
2 Watts,
120 Watts |
57 Watts,
2 Watts,
104 Watts |
98°F - 140°F |
98°F - 160°F
(indoor)
98°F - 185°F
(outdoor) |
V75iN
V75iP
V75eN
V75eP |
|
10.3 |
180 |
0.4 |
0.26 |
7.5 |
0.82 |
76 Watts,
2 Watts,
120 Watts |
57 Watts,
2 Watts,
104 Watts |
98°F - 140°F |
98°F - 160°F |
| Luxury Series - High output for larger homes |
RL75iN
RL75iP
RL75eN
RL75eP |
|
10.3 |
180 |
0.4 |
0.26 |
7.5 |
0.82 |
76 Watts,
2 Watts,
104 Watts |
57 Watts,
2 Watts,
104 Watts |
98°F - 140°F |
98°F - 160°F |
RL94iN
RL94iP
RL94eN
RL94eP |
|
10.3 |
199 |
0.4 |
0.26 |
9.8 |
0.82 |
97 Watts,
2 Watts,
184 Watts |
65 Watts,
2 Watts,
104 Watts |
98°F - 140°F |
98°F - 185°F |
Ultra Series - Ultimate efficiency, largest capacity
|
RU80iN
RU80iP
RU80eN
RU80eP |
|
15.2 |
152 |
0.4 |
0.26 |
h8 |
0.96 |
42 Watts,
2 Watts,
146 Watts |
41 Watts,
2 Watts,
168 Watts |
98°F - 140°F |
98°F - 185°F |
RU98iN
RU98iP
RU98eN
RU98eP |
|
15.2 |
199 |
0.4 |
0.26 |
9.8 |
0.95 |
64 Watts,
2 Watts,
146 Watts |
63 Watts,
2 Watts,
168 Watts |
98°F - 140°F |
98°F - 185°F |
* e = Exterior/Outdoor; i = Interior/Indoor; N = Natural Gas; P = Liquid Propane
** Commercial controller must be purchased separately
Technical Specifications:
→Type of Appliance: Condensing, Tankless, Temperature controlled, continuous flow, gas hot water system, Energy Star Qualified
→Rinnai model number: REU-KB3237WD-US
→Operation / Installation: Forced combustion; outdoor only
→Minimum/Maximum Gas Rate (Input): 15,200 / 199,000 BTU/h
→Electrical: Appliance: AC 120 Volts - 60 Hz
Temperature Controller: DC 12 Volts
→Electrical Consumption: Normal: 63 watts. Standby: 2 watts. Anti-frost protection: 168 watts.
→Ignition System: Direct electronic ignition
→Hot Water Capacity: Minimum flow rate: 0.26 GPM, Minimum activation flow rate: 0.4 GPM, Maximum flow rate: 9.8 GPM
→Temperature: 98° - 120° F (factory default) Maximum temperature is selectable at 120° F or at 140° F; 98° - 185° F available with the MCC-91-2 controller for commercial and hydronic applications
→Temperature (without remote): 120° F (factory default) or 140° F
→Approved Gas Types: Natural or Propane (ensure unit matches gas type)
→Energy Factor (EF): 0.95 Propane: 0.95
→Service Connections Natural Gas: Gas supply: 3/4 inch MNPT. Cold water inlet: 3/4 inch MNPT. Hot water outlet: 3/4 inch MNPT.
→Isolation & Pressure Relief Valves Included: Heavy duty forged brass Webstone Isolator valves EXP E2, certified
to NSF/ANSI 61-8 for potable water
→Water Flow Control: Water flow sensor, electronic water control and by-pass control
→Minimum/Maximum Water Supply Pressure : 15 - 150 PSI (50 PSI or above is recommended for maximum flow)
→Controller: 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)
→Controller Cable: Non-polarized two-core cable, minimum 22 AWG
→Safety Devices: •Flame failure - Flame Rod •Boiling protection •Combustion fan rpm check •Over current - glass fuse •Remaining flame (OHS) •Thermal fuse, •Automatic frost protection,
→Clearances from Combustibles: •Top of heater - 12 inches, •Front (Panel) - 24 inches, •Front (Exhaust) - 24 inches, •Back of heater - 0 inches, •Bottom of heater - 12 inches, •Sides of heater - 6 inches,
→Clearances from Non-combustibles: •Top of heater - 2 inches
* 24 inches require for serviceability •Front (Panel) - 0 inches *, •Front (Exhaust) - 24 inches, •Back of heater - 0 inches, •Bottom of heater - 2 inches, •Sides of heater - 1/8 inch
→Min. / Max. Gas Supply Pressure: Natural Gas: min 5” W.C. max 10.5” W.C., Propane Gas: min 8” W.C. max 13.5” W.C.
→Manifold Gas Pressure (inches W.C.): Natural Gas: high fire 3.0” W.C. low fire 0.46” W.C., Propane Gas: high fire 3.5” W.C. low fire 0.50” W.C.
→Front cover material: Powder coated galvanized steel
Dimensions
Measurement in inches (millimeters)
Documents
• Installation and Operation Manual
• Detailed Specifications: RU98e
• Hot Water Design Manual
Frequently Asked Question
Q1: Can this heater be used with 1/2" pipe?
A1: The normal connection for both gas and water supply is 3/4" MNPT. For gas, you can use other pipe sizes as long as you maintain between 8 and 13.5" of water column. For water, you can use other pipe sizes; but since that will affect your flow rate, your output water temperature will be different from the calculations shown with 3/4" MNPT.
Installation Help and Recommendations
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