Rinnai Water Heater EX22CTN Specifications
EX22CT (RHFE-559FTA2)
Type of Appliance
Rinnai Model Number
Gas Rate Input (BTU/hour)
Gas Rate Output (BTU/hour)
AFUE Rating
Minimum Gas Supply Pressure
Maximum Gas Supply Pressure
Electrical Connection
Gas Connection
Combustion System
Ignition System
Fan CFM Output
Temperature Settings
Temperature Control
Direct vent wall furnace suitable for homes, apartments, and
condominiums, residential or commercial setting; modular/mobile home
approved; forced combustion, forced convection
RHFE-559FTA2-N (Natural gas) RHFE-559FTA2-P (Propane)
Low - 8,200 Low - 8,200
High - 21,500 High - 20,700
Low - 6,560 Low - 6,560
High - 17,200 High - 16,560
81%
3.5 in (89 mm) W.C. 8 in (203 mm) W.C.
10.5 in (267 mm) W.C 13 in (330 mm) W.C.
AC 120V, 60 Hz, 56 watts
1/2 inch NPT
Stainless steel Bunsen burners
Electronic spark ignition
Low: 110.5 High: 162.7
Low (LO): minimum combustion
60° - 80° F in 2° increments
High (HI): maximum combustion
Electronic thermostat
Temperature limiting program to comply with Inside Design
Temperature limits
Humidifier Tray
Weight
Clearance from Combustibles
Noise Level
Warm Air Outlet
FEATURES
Restart capability
Timer Settings
Seven-stage modulating gas valve
Negative coefficient thermistor
Variable speed inducer motor with
pressure switch
Self diagnostic electronics
Quiet operation
Wall Thermostat connectable
Enameled tray with capacity of 2.1 pints (1000 cc)
Approximately 57 lbs (26 kg)
Side: 2 inches (50 mm), Top: 0 inches (0 mm), Front: 40 inches (1 m)
33 - 42 dB(A)
Bottom front louvers
Restarts automatically when ignition or combustion fails.
Starts and turns off the heater at 2 timer settings.
Provides precise gas flow by operating from one to seven stages.
Detects temperature change in 1/2 of a degree.
Monitors and controls combustion fan and allows the appliance to overcome
winds of up to 40 mph.
Continually monitors functions; provides auto shutdown codes; indicates
Reduces noise through use of swept blades in convection fan; quiet
expansion / contraction of parts due to temperature changes.
Ability to connect to a field supplied wall thermostat.
© 2017 Rinnai Corporation
RHFE-559FTA2 SP 8/2017
EX22CT (RHFE-559FTA2)
Safety Devices
Venting
Maximum Vent Length
Wall Thickness and
Flue Manifold Kits
(the “A” vent kit is included
with the appliance)
Flame rod detects flame failure; results in auto shutdown to prevent escape
of gas
Bi-metal switch, thermal fuse, and thermistor detect overheat condition;
results in auto shutdown
3 amp fuse protects against power surge; results in auto shutdown
Abnormal spark at time of ignition results in auto shutdown
Combustion fan purges any gas from the combustion chamber before
ignition
Convection fan continues to run after burner shutdown to cool internal parts
Child lock prevents inadvertent operation
Appliance shuts down if room reaches 104° F (40° C)
Concentric; 3 1/8 inch (80 mm) wall hole
13 feet (4 m) with a maximum of 2 bends; maximum 10 feet (3 m) vertically
Name Kit No. Fits Walls
S Vent Kit FOT-150 3 - 4 1/2 in (75 - 115 mm)
A Vent Kit FOT-151 4 1/2 - 9 1/2 in (115 - 240 mm)
B Vent Kit FOT-152 9 1/2 - 15 3/4 in (240 - 400mm)
C Vent Kit FOT-153 15 3/4 - 23 5/8 in (400 - 600 mm)
D Vent Kit FOT-154 23 5/8 - 31 1/2 in (600 - 800 mm)
Warranty
Conversion Kit
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.
DIMENSIONS
Labor: 2 years; Parts: 5 years; Heat Exchanger: 10 years
To natural gas: 204000036 To propane gas: 204000040
Rinnai Corporation • 103 International Drive • Peachtree City, GA 30269 • Toll-Free: 1-800-621-9419 • Fax: 678-829-1666 • www.rinnai.us
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