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8 EX17DT and EX22DT Installation and Operation Manual
The efficiency rating of this furnace is a product thermal efficiency rating determined under continuous operating
conditions and was determined independently of any installed system.
Rinnai products are continually being updated and improved; therefore, specifications are subject to change without prior
notice.
EX17DT EX22DT
Application
Approved for manufactured home (USA only) or mobile home or residential installation convertible
for use with natural gas and liquefied petroleum gases (propane) when provision is made for the
simple conversion from one gas to the other. Approved for commercial setting. Approved for
installation at altitudes up to 10,200 feet (3,109 m).
Natural Gas Liquid Propane Gas Natural Gas Liquid Propane Gas
Min. Supply Gas
Pressure
3.5 in. (89 mm) wc 8.0 in. (203 mm) wc 3.5 in. (89 mm) wc 8.0 in. (203 mm) wc
Max. Supply Gas
Pressure
10.5 in. (267 mm) wc 13.0 in. (330 mm) wc 10.5 in. (267 mm) wc 13.0 in. (330 mm) wc
Btu/h Input Low 8,200 High 16,700 Low 8,200 High 21,500 Low 8,200 High 20,700
General
Description
Forced Combustion, Forced Convection, Flued Gas Furnace
Operation Push Button Electronic
Gas Connection 1/2 in. (13 mm) Male NPT
Gas Control Electronic
Burners Stainless Steel Bunsen Burner
Temperature
Control
Electronic Thermostat, Low, 60-80ºF (16-26°C) in 2ºF (1°C) Increments, High
Ignition System Electronic Spark Ignition
Flue System
The flue must be terminated to atmosphere with only flue components listed with the furnace’s
certification. Warranty will be voided if non-listed components are installed.
Humidifier Tray
Capacity - 2.1 pints (1,000 cc)
Electrical
Connections
AC 120 Volts, 60 Hz, 24 watts AC 120 Volts, 60 Hz, 30 watts
Standby Power 0.7 watts
Weight
51 lbs (23 kg)
Sound Level
33-38 dB 33-42 dB
Safety Features
Overheat: The furnace will automatically shut down when exceeding a predetermined
temperature.
Flame Failure: The furnace will automatically shut down if the burner flame is extinguished.
Power Failure: The furnace will shut off the gas if it loses electrical power.
Power Surge Fuse: A glass fuse on the PC board protects against overcurrent. If the fuse
blows then all indicator lamps will be off.
Spark Detector: The furnace automatically shuts down if there is an abnormal spark at ignition.
Fusible Link: In case the overheat feature does not prevent an overheat then the fusible link
could break, shutting off the furnace.
3.2 Specifications
Table 2: Specifications
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