Rinnai Energysaver ES38 Specification sheet

— Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in
your building.
• Immediately call your gas supplier from a neighbor’s phone.
Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
— Installation and service must be performed by a qualified
installer, service agency or the gas supplier.
WARNING: If the information in these instructions is not
followed exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
Owner’s Operation and Installation Manual for the
ES38 (RHFE-1004RFA)
Energysaver
Gas Direct Vent Wall Furnace
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
Table of Contents........... 2
Safety Information .......... 3
Operating Instructions .... 6
Care and Maintenance ... 10
Fault Codes.................... 12
Installation Instructions... 14
Parts List ........................ 31
Consumer Support ......... 42
Register your product at www.rinnairegistration.com
or call 1-866-RINNAI1 (746-6241)

2Rinnai Corporation ES38 Manual
This appliance may be installed in an aftermarket, permanently located, manufactured home
(USA only) or mobile home, where not prohibited by local codes.
This appliance is only for use with the type of gas indicated on the rating plate. This appliance
is not convertible for use with other gases, unless a certified kit is used.
Table of Contents
This appliance may be installed as an OEM installation in a manufactured home (USA only) or
mobile home and must be installed in accordance with the manufacturer’s instructions and the
Manufactured Home construction and Safety Standard, Title 24 CFR, Part 3280, in the United
States, or the Mobile Home Standard, CAN/CSA Z240 MH Series, in Canada. This appliance
is only for use with types of gas indicated on the rating plate. A conversion kit is supplied with
the appliance.
Consumer Safety Information
Safety Definitions ............................................. 3
Safety Behaviors and Practices....................... 3
Safety Features................................................ 4
Specifications
Appliance Specifications ..............................4, 5
Features ........................................................... 5
Flue Manifolds.................................................. 5
Operating Instructions
Getting to Know your New Heating Appliance 6
Control Panel ................................................... 7
Operating the Heater ..................................8, 9
Care and Maintenance................................... 10
Before Making a Service Call......................... 11
Fault Codes....................................................12
Restart Function............................................. 13
Troubleshooting ............................................. 13
Installation Instructions
General Instructions....................................... 14
Gas Connection ............................................. 15
Clearances to Combustibles.......................... 15
Flue Terminal Clearances ....................... 16, 17
Dimensions .................................................... 18
Installation Parts ........................................... 19
Drilling Flue Hole ........................................... 20
Attach Wall Brackets...................................... 20
Attach Back Spacers ..................................... 20
Flue Manifold Installation......................... 21, 22
Extension Kit Installation .......................... 23-25
Connecting the Appliance.............................. 26
Operating Instructions ................................... 27
Cut-Away Diagram......................................... 28
Wiring Diagram .............................................. 29
Ladder Diagram ............................................. 30
Parts List................................................... 31-41
Consumer Support
Warranty Information ..................................... 42
Limited Warranty...................................... 42, 43

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Rinnai Corporation ES38 Manual
WARNING
CAUTION
Safety Behavior and Practices
• Do not block the warm air discharge. Do not allow
anyone to sleep directly in front of the appliance.
• Due to high temperatures, the appliance should be
located out of traffic and away from furniture and
draperies.
• Children and adults should be alerted to the
hazards of high surface temperature and should
stay away to avoid burns or clothing ignition.
• Young children should be carefully supervised
when they are in the same room as the appliance.
• Clothing or other flammable material should not be
placed on or near the appliance.
• Any safety screen or guard removed for servicing
must be replaced prior to operating the appliance.
• Do not insert items into the louvers.
• Do not spray aerosols near the appliance while it is
operating. Most aerosols contain butane gas which
is flammable.
• Do not unplug the appliance while it is operating or
while the fans are on.
• Do not use bare hands to touch the front louvers
due to high temperatures which may cause burns.
• Keep the area around the appliance clear and free
•
from combustible materials, gasoline, and other
flammable vapors and liquids.
• Never store liquid propane containers indoors.
• Do not use this appliance if any part has been
under water. Immediately call a qualified service
technician to inspect the appliance and to replace
any part of the control system and any gas control
which has been under water.
• This appliance is equipped with a three-prong plug
for your protection against shock hazard and
should be plugged directly into a properly grounded
three-prong receptacle. Do not cut or remove the
ground prong from this plug.
• Any alteration to the appliance or its controls can
be dangerous.
• Do not operate appliance with the panels removed,
cracked or broken. Replacement of the panels
should be done by a licensed or qualified service
person.
Consumer Safety Information
Safety Definitions
This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and
others.
Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in minor or
moderate injury. It may also be used to alert against unsafe practices.
DANGER
CAUTION
WARNING
Repairs should be performed by a qualified
service technician. Consumer should not repair by
yourself.

4Rinnai Corporation ES38 Manual
)ylnoASU(emohderutcafunamroFnoitacilppA or mobile home or residential installation
convertible for use with natural gas and liquefied petroleum gases (propane /
LPG) when provision is made for the simple conversion from one gas to the
other.
For commercial setting.
For installation at altitudes up to 10,200 feet (3109 m).
General Description Forced combustion, forced convection, flued gas furnace
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Gas Connection 1/2 in NPT
Gas Control Electronic
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Temperature Control Electronic thermostat
Ignition System Electronic spark ignition
Flue System The flue must be terminated to atmosphere with only flue components listed
with the appliance’s certification. Warranty will be voided if non listed
components are installed.
Humidifier Tray Capacity - 7 pints (3000 cc)
Electrical Connection AC 120V, 60 Hz, 121 watts
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Noise Level 37-47 dB
AFUE Rating Natural Gas: 80.6% Propane: 82.0%
Specifications
Rinnai is continually updating and improving products. Therefore, specifications are subject to change without
prior notice.
The efficiency rating of this appliance is a product thermal efficiency rating determined under continuous operating
conditions and was determined independently of any installed system.
Safety Features
• Overheat: The appliance will automatically shut
down when the appliance exceeds a predetermined
temperature.
• Flame Failure: The appliance will automatically
shut down if the burner flame is extinguished.
• Power Failure: The appliance will cut 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 appliance automatically shuts
down if there is an abnormal spark at ignition.
• Fusible Link: In case the overheat feature
prevents the temperature from rising then the fusible
link will break shutting off the appliance.
Appliance Specifications

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Rinnai Corporation ES38 Manual
Features
• Restarts automatically when ignition or combustion
fails.
• Clean Heating Forced Flue Type
• Easy Operation One-Touch Ignition
• Sensible Temperature Control Feature
• Comfortable Room Temperature Control and
Display
• Warm Air Outlet at Floor Level (keeps your feet
warm)
• Function Lock
• Room Temperature Setting Memory
• Clean the Air Filter - Indicator Lamp
• Energy Saving Economy Setting
• Humidifier Tray
• Air Flow Directional Louvers
• Direct Vent Easily Installed
• Proportional Heating Variable Capacity
• Hush! Quiet Operation
• Modern Design Minimizes Floor Space
Requirements
• Fault Code Message Display
Appliance Specifications
The following flue manifold sizes are
available for different wall thicknesses:
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)
Natural Gas Propane Gas
Minimum supply gas pressure 5.0 in (127 mm) W.C. 11.0 in (280 mm) W.C.
Maximum supply gas pressure 10.5 in (267 mm) W.C. 13.0 in (330 mm) W.C.
BTU/hour input Low 10,500 High 38,400 Low 10,500 High 36,500
BTU/hour output Low 8,400 High 30,720 Low 8,400 High 29,200
Flue Manifolds