Rinnai RUC90i Specification

RUC90i (KBD2934FFUD)

Type of Appliance

Rinnai model number

Operation / Installation

Minimum/Maximum Gas Rate (Input)

Electrical

Electrical Consumption

Amperage

Ignition System

Hot Water Capacity

Temperature

Temperature (without remote)

Approved Gas Types

Condensing, Tankless, Temperature controlled, continuous flow, gas hot water system, Energy Star Qualified

REU-KBD2934FFUD-US

Forced combustion; indoor only; Certified for installation in Manufactured (Mobile) Homes

15,200 - 180,000 BTU/h (4.5-52.8 kW)

Appliance: AC 120 Volts - 60 Hz Temperature Controller: DC 12 Volts

Normal: 75 w Standby: 2 w Anti-frost protection: 146 w

Max with pump: 8A Max without pump: 4A 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: 9.0 GPM (29 l/min)

98° - 120° F (37°- 49°C) (factory default) Maximum temperature is selectable at 120° F (49°C) or at 140° F (60°C); 98° - 185° F (37°- 49°C) available with the MCC-91-2 controller for commercial and hydronic applications

120° F (49°C) (factory default) or 140° F (60°C)

Natural or Propane (ensure unit matches gas type)

Energy Factor (EF)

Service Connections

Isolation & Pressure Relief Valves Included

Water Flow Control

Minimum/Maximum Water Supply Pressure

Natural Gas: 0.96 Propane: 0.96

Gas supply: 3/4 inch (19mm) MNPT Cold water inlet: 3/4 inch (19mm) MNPT Hot water outlet: 3/4 inch (19mm) MNPT

Heavy duty forged brass Webstone Isolator valves EXP E2, certified to NSF/ANSI 61-8 for potable water

Water flow sensor, electronic water control and by-pass control

50 - 150 PSI (345-1035 KPa) (60 - 80 PSI (414 - 552 KPa) or above is recommended for maximum flow)

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.

FLOW TABLE

Water Flow gpm (l/min)

10.0

9.0

8.0

7.0

6.0

5.0

4.0

3.0

2.0

1.0

(37.9)

(34.1)

(30.3)

(26.5)

(22.7)

(19.0)

(15.1)

(11.4)

(7.6)

(3.8)

0.0

25 (13.9) 50 (27.8) 75 (41.6) 100 (55.6) 125 (69.4) 150 (83.3) 0

delta T - Temperature Rise ºF (ºC)

RUC90i-SP 9/2014

RUC90i (KBD2934FFUD)

External Recirculation Pump Control

Controller

Controller Cable

Safety Devices

Clearances from Combustibles

* 24 inches (609.6mm) required for service

Clearances from Non-combustibles

* 24 inches (609.6mm) required for service

Min. / Max. Gas Supply Pressure

Manifold Gas Pressure (inches W.C.)

NOx

Venting

Built in Rinnai Circ-Logic™ : Recirculation program cycles external pump

MC-91-2US (included) MC-195T-US Deluxe controller: MC-100V-1US (optional) Bathroom controller: BC-100V-1US (optional) MCC-91-2US (optional; for hydronic and commercial applications)

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 (152.4mm)  Front of heater - 6 inches *(152.4mm)  Sides of heater - 2 inches (50.8mm)

 Top of heater - 2 inches (50.8mm)  Front of heater - 6 inches *(152.4mm)  Sides of heater - 1/2 inches (12.7mm)

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 2.5” W.C. (6.2mbar) low fire 0.42” W.C. (1.1mbar) Propane Gas: high fire 2.9” W.C. (7.2mbar) low fire 0.47” W.C. (1.2mbar)

Complies with South Coast Air Quality Management District 14 ng/J or 20 ppm NOx emission levels g 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 (304.8mm)  From vent pipe - 0 inches

Limited Warranty

DIMENSIONS

1.2 (31.2)

20.6 (523.3)

31.2 (791.3)

2.9 (74.6)

Rinnai Corporation • 103 International Drive • Peachtree City, GA 30269 • Toll-Free: 1-800-621-9419 • Fax: 678-364-8643 • www.rinnai.us

Heat exchanger: 12 years* for residential, 10 years for residential and space heating, and 5 years* for commercial; 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.

WEIGHT: 61.7 lb (28 kg)

ø 5.5 (140.2)

5.9 (150)

2.8 (70.1)

2.02 (51.3)

10.1 (257.7)

8.7 (222)

25.7 (654)

28.5 (723.3)

A (CONDENSATE

DIM Inches (mm)

A (GAS) 1.6 (40.2)

A (COLD) 2.0 (50.2)

A (HOT) 1.6 (41.2)

OUTLET)

B 5.0 (127.2)

C 1.9 (47.8)

D 0.52 (13.3)

0.9 (22.4)

DIM Inches (mm)

E 2.2 (56.3)

F 2.3 (58.3)

G 5.0 (127.2)

H 2.0 (50)

I 3.0 (76)

J 7.1 (179)

K 18.3 (466)