Rinnai ENERGYSAVER EX08C User manual

Rinnai ENERGYSAVER® Direct Vent
Wall Furnace Installation
Fundamentals

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Rinnai ENERGYSAVER® Direct Vent Wall Furnace
Installation Fundamentals
The following course is approved for NATE
continuing education hours (CEH’s).
This course will earn the following CEH’s:
Warm Air Heating-Gas-Installer –2 hours
Warm Air Heating-Gas-Service –2 hours
If you require credit for NATE, please notify the
instructor at this time.

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Rinnai Service and Support (800-621-9419)
Rinnai America also provides the following web sites for support:
•www.rinnai.us –our main site for all product, sales, and service information. Of Note—a comprehensive documents library is
available at the sales/service link. Website registration is required for access.
Rinnai America’s phone support structure consists of the following departments:
•CRC –Consumer Response Center –Fielding general calls, consumer questions, etc.
•Available in office from 8 a.m. to 8 p.m. EST, Monday - Friday
•Parts and Warranty Department –Fielding parts orders and warranty issues
•Available in office from 8 a.m. to 5 p.m. EST, Monday –Friday
•Technical Support Department–Fielding technical issues related to the function of all
Rinnai Products
•Available in office from 8 a.m. to 8 p.m. EST, Monday –Friday AND 24/7/365 on call support for technicians who are at the
service location.
•Engineering / Applications Department –Fielding issues related to product applications
including sizing
•Available in office from 8 a.m. to 5 p.m. EST (The engineering dept does not size heating appliance applications—an industry
accepted Btu heat loss calculation must be performed by the installer)

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EX17C
EX22C
ES38 EX08C
EX11C
Product Model Numbers and Specifications
NEW
MODELS PREVIOUS MODELS CFM* MAX POWER* DECIBELS* INPUT BTU RANGE* AFUE (Efficiency)*
EX08C ES08, RHFE 201 FA 55.5-82.0 41-42 W 27-36dB 3,000-8,000 NG/LP NG-82%
LP 83%
EX11C ES11, RHFE 263 FAII 69.3-102.5 44-47 W 31-38dB 5,500-11,000 NG
5,700-11,000 LP NG-81%
LP-82%
EX17C ES17, RHFE 431 FAIII
EX17, RHFE 431 WTA 111.3-137.8 40-46 W 33-38dB 8,200-16,700 NG/LP NG-81%
LP-82%
EX22C ES22, RHFE 556 FAIII
EX22, RHFE 556 WTA 111.3-162.7 52 W 32-42dB 8,200-21,500NG 8,200-20,700 LP NG-81%
LP-82%
ES38 RHFE 1004 FA 203.4-360.6 121 W 37-47dBA 10,500-38,400 NG
10,500-36,500 LP NG-80.6%
LP-82%
Ensure the correct part number is identified for service / parts support
*Current model specifications-previous models may slightly vary
All models available in beige
EX22(C) and ES38 models are
also available in white.
WhiteBeige

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Features and Benefits
•When sized correctly, the ENERGYSAVER® Furnace can
be used as a whole house/primary heat source.
•Easy Control and Operation
•One-touch ignition
•Programmable thermostat with a temperature range between 55°F to
95°F (13°C to 35°C)
•During normal operation, the display will dim to save power
•Display available in Fahrenheit or Celsius
•Setback and Frost Protection allows a minimum temperature to be
maintained even when off or between scheduled heating events
•Adjustable maximum temperature setting
•Energy saving economy setting

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Features and Benefits
•The unit’s standby power consumption is less than 1
watt.
•Seven-stage Intelligent Modulating Gas Valve and
blower control.
•Warm air discharge at floor level.
oDirectional louvers to optimize direction of air flow.
•Ultra-quiet operation-Decibel range of 27-47 is
comparable to a normal conversation.
•Gas type is field convertible.
•Restart Functions allow automatic restart after ignition,
combustion, or power failures.
•Small 3” diameter concentric vent.

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Safety Features
•Self Diagnostic Circuitry-Should the ENERGYSAVER®detect an
unsafe operating condition, the unit will shut down and a fault
code will display indicating the specific issue.
oIf the code is due to an ignition or combustion failure, the unit
will attempt to relight automatically.
•Function/Child Lock
•Cool to the touch Cabinets.
•Restricted air filter indication lamp and audible reminder-Current
model ENERGYSAVERS will flash a reminder lamp and emit an
audible beep if it detects operational conditions indicative of a
restricted air filter.
•Sealed Heat Exchanger-flame and combustion is sealed
from the heating area.

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Safety Features
•Overheat protection- Multiple temperature sensors monitor the
appliance’s temperature. Shut down occurs if an unsafe
operational temperature is detected.
•Combustion and convection fan validation-should either of these
fans fail to maintain the proper speed (likely due to a restriction),
the PCB will not allow the unit to operate.
•Electronic ignition-no standing pilot.
•Power failure protection-Should the ENERGYSAVER lose power,
the gas supply will automatically close. Upon resumption of
power, the unit will automatically attempt to restart.
•ENERGYSAVERS are equipped with an inline glass fuse and surge
protection to protect from over-current or power surge.

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To ensure the ENERGYSAVER operates as designed, an industry standard Btu heat loss
calculation must be performed on the area to be heated.
•This calculation considers all factors that contribute to heat loss such as:
•Area and volume of the space to be heated
•Geographical location and climate where the furnace will be located
•Structural characteristics of the building such as number of windows, exterior doors,
construction material, etc
ENERGYSAVER®Sizing
• The Air Conditioning Contractors’ Association (ACCA) has an
industry standard Btu calculation in their “Manual J” publication.
•A qualified and licensed installer should be familiar with this type
of calculation.
•Visit http://www.acca.org/ for more information.
•Rinnai also offers a basic DV sizing calculator at
http://www.rinnai.us/heat_selector_2007.swf
•NOTE: Incorrectly sized applications can lead to the ENERGYSAVER short-
cycling or failing to bring the area to the desired set point temperature.

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The ENERGYSAVER has the ability to heat an entire structure from a central room. Here’s how:
•2nd law of thermodynamics –Heat seeks cold
•Once the main room approaches
the set point temperature, the
heat begins to move to other
rooms—seeking cold.
•The variable gas valve and
blower control modulate to
ensure heat reaches the
remainder of the structure
without overheating the main
area.
•Cold air is detected quickly
by the thermistor—mounted
two inches above the floor
and able to detect changes
as small as 6/10th’s of a
degree (Fahrenheit).
•These features aid in
reducing stratification in the
atmosphere (different layers
of room temperature).
1
2 3
(Click here to watch animation)
ENERGYSAVER®—Whole House Furnaces
Key concepts

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•Variable speed technology –Modulating gas and air based on the heat loss at that moment
74°
72°
70°
68°
66°
74°
72°
70°
68°
66°
On / Off Single Stage Heating Appliance Continuous-Run Modulating Technology
Gas
Usage
Gas
Usage
Gas
Usage Continuous gas usage but at much lower levels
•With on/off single stage operation, gas usage
can be high due to alternating periods between
maximum flame and no flame at all
• The Energysaver’s modulating technology has the
ability to replace only the heat escaping the
structure by continuously operating at heating levels
based on the demand at that moment
•This results in different layers of temperatures
throughout the structure leading to a less than
comfortable living environment
•This leads to lower gas usage and higher levels
of comfort.
ENERGYSAVER®—Whole House Furnaces
Key concepts

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1. Combustion fan purges heat chamber, PCB
verifies fan rotation
2. Ignition spark begins
3. When sensing electrode detects spark, gas
valve assembly opens
4. Ignition occurs and heat exchanger warms
5. Spark stops as flame rod & PCB verify flame
6. When heat exchanger is warm enough,
convection room blower circulates warm air
into the structure.
7. When filled, the humidifier tray ensures the
air is not too dry (if needed)
8. Thermistor & PCB determine gas and fan
settings
9. When temperature set point is
reached, if needed, gas valves close &
combustion fan stops. Convection fan
continues to run to cool down unit.
10.When temperature drops, process starts over
ENERGYSAVER®Direct Vent Furnaces
Operation Sequence
Spark and sensing
electrodes
PCB
Humidifier Tray
Heat Exchanger
Combustion
Fan
Thermistor
POV SV1 & 2
Convection Fan
Flame Rod
Concentric Termination

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Control Panel Review (C-Series models)
Child
Safety
Lock
Temperature Control and Display-
Display will enter a power saving dimmer mode
during normal operation
Restricted
Filter
Indicator
Operation Lamp
Green = standby
Solid red = when flame is present
Flashing red = fault code is present
Economy
Feature Setback
Feature
Timer and Clock
Setup
Override
Temporarily bypasses timers
EX08C, 11C, 17C,
22C MODELS
Temperature Control and Display
Room temp lamp stays on
Room temp displays only when adjusted
ES38 MODELS
Production after
7/2011
Economy Feature
Timer 1 and 2
Note: While off, pressing Timer
1 and 2 together will change the
display from F°to C°
Function Lock -
Pressing both arrows will engage

1. Child Safety Lock
2. Economy Feature
3. Timer 1 and 2
Note: While off, pressing Timer 1 and
2 together will change the display
from Fahrenheit to Celsius
4. Override
Temporarily bypasses timers
5. Temperature Control and Display-
Display will enter a power saving dimmer mode
during normal operation
6. Timer and Clock Setup
7. Setback Feature
8. Restricted Filter Indicator
This lamp is on the front panel of the ES38
9. Operation Lamp
Green = standby
Solid red = when flame is present
Flashing red = fault code is present
This lamp is on the front panel of the ES38
10. On/Off Button 14
Control Panel Review (C-Series models)
ES38 MODELS (Production after 7/2011)
1. Temperature Control and Display-
Display will enter a power saving dimmer mode
during normal operation
2. Restricted Filter Indicator
3. Operation Lamp
Green = standby
Solid red = when flame is present
Flashing red = fault code is present
These lamps are on the front panel of the ES38
4. Child Safety Lock
5. Economy Feature
6. Timer 1 and 2
Note: While off, pressing Timer 1 and 2 together will
change the display from F°to C°
7. Override
Temporarily bypasses timers
8. Timer and Clock Setup
9. On/Off Button
10. Setback Feature
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EX08C, 11C, 17C, 22C MODELS
1 2 3 6
4 7 8 10
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1. Temperature Control and Display-
Display will enter a power saving dimmer mode
during normal operation
2. Restricted Filter Indicator
3. Operation Lamp
Green = standby
Solid red = when flame is present
Flashing red = fault code is present
These lamps are on the front panel of the ES38
4. Child Safety Lock
5. Economy Feature
6. Timer 1 and 2
Note: While off, pressing Timer 1 and 2 together will
change the display from F°to C°
7. Override
Temporarily bypasses timers
8. Timer and Clock Setup
9. On/Off Button
10. Setback Feature
Description Key
The following pages
will cover each topic in
detail
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1
2
3
6
4
7
10
9

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Control Panel Review (all other current models)
Fahrenheit
L (approx. 55)
60
62
64
66
68
70
72
74
76
78
80 H (approx. 95)
Celsius L (approx. 13) 16
17
18
19
20
21
22
23
24
25
26 H (approx. 35)
Temperature Control and Display
Room temp lamp stays on
Room temp displays only when adjusted
ES38 MODELS
Production before 7/2011
Economy Feature
Function Lock -
Pressing both arrows will engage
The below table shows the
temperature range of all models

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After 30 minutes of maintaining
70°F, the unit will maintain 68°F
Economy Mode is designed to save gas usage over time.
•The Economy Function is based on the theory that the human body cannot detect small
temperature changes over an extended period of time.
•30 minutes after the set point temperature is achieved, the unit will reduce the temperature
by 2°F. After 30 additional minutes, the unit will reduce the temperature an additional 2°F.
•The maximum temperature reduction will not exceed 4°F.
•This reduction will not occur if the unit is undersized and cannot maintain the initial set point.
Economy Function
Initial Set point is 70°F
After 30 minutes of maintaining 68°F, the unit will
maintain 66°F. No further reduction will occur
30 60 90 0
Minutes of Operation at Set Point
Operation Temperature
66°F
68°F
70°F
72°F

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C-Series ENERGYSAVERS® have two primary methods of operation:
•Exclusively as a thermostatically controlled furnace
•When left to operate on a continuous-run basis using feedback from its
thermostat, the ENERGYSAVER will achieve an optimum balance between
comfort and efficiency.
•As a programmable furnace with two separate timers and a setback function
•The timers allow two separate heating events to be set
•Timer 1 and Timer 2 (individually or both as needed) can then be engaged to
allow the unit to turn on and off for those events
•The ENERGYSAVER is designed to attempt to have the area at the set point
temperature when the timer event begins—meaning it could turn on several
minutes earlier to achieve set point temperature
•To set the clock and timers, see the installation manual
Clock, Timer, and Setback Functions
(C-Series)

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•If needed, the Override button can be selected to temporarily turn on or
off the timers to allow manual operation.
• If the unit is operating during a Timer’s event, pressing Override will turn
the unit off until the next Timer’s event.
•If the unit is off between Timer events, pressing Override will turn it on. It
will continue to run until the end of the next Timer’s event and return to
Timer operation.
•If Override is turned off, the unit will return to Timer operation.
Clock, Timer, and Setback Functions
(C-Series)

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•Daily schedule:
•Occupants wake at 5am
•Home is empty from 9am until 4pm
•Occupants are asleep from 11pm until 5am
12am 2am 4am 2pm12noon8am6am 4pm 8pm 10pm6pm
10am 12am
Timer 1
70°F temp is
maintained
•Operation temperature is set to 70°F
•Timer 1 is set from 5am to 9am
•Timer 2 is set from 4pm to 11pm
•Setback is set to 66°F
Timer 2
70°F temp is maintained
Between timer events, the Setback
temperature of 66°F is maintained
Between timer events,
the Setback temp of
66°F is maintained
Setback allows a minimum temperature to be pre-set and maintained between timer events
or while the unit is turned off.
• This feature’s primary function is to slightly reduce the temperature (and gas usage) during
extended periods of nonuse or inactivity—such as sleeping or when the home is empty.
•NOTE: When this feature is used as a setback function for energy savings, it is not advisable to reduce
setback more than 4-6°F from the regular set point. This could cause the ENERGYSAVER®to use
more gas to return to the set point and cancel any savings achieved.
•This feature can also be used as frost protection during longer periods of vacancy (such as
in a second home). For this use the setback temperature can be set as low as 38°F.
•Even when off, if the setback feature is engaged, the setback temperature will be maintained.
•If power is lost and setback is ON, it will be ON at the resumption of power.
The following example shows how, when used together, the timer and setback functions can
maximize comfort and efficiency:
Clock, Timer, and Setback Functions
(C-Series)

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All ES, EX, and C-Series models will attempt restart after a
power failure or flame failure to ensure heating is not
interrupted for extended periods of time.
•If there is a power failure while the appliance is operating,
the unit will attempt to restart automatically when the power
is restored.
•The timers will retain their settings after a power outage.
•After an outage, the clock will retain the time at that
moment until power resumes. Therefore, a short power
outage (a few minutes) will have virtually no effect on timer
operations whereas a longer outage will require the clock to
be reset. Dashes will initially display to indicate an outage
occurred.
Restart Features