GT Essency E55R User manual

E55R
ELECTRIC WATER HEATER
Water is essential to life. And Essency brings
water to your life in amazing ways. We design
water heaters built to outlast other tanks. Water
heaters intelligent enough to give you greater
control and peace-of-mind. All while delivering
the highest performance in the industry in a
design that’s both aesthetically appealing and
ecologically attentive. Our water heaters turn
the essential into the exceptional.
Installation &
Operation Manual
THIS IS YOUR USE AND CARE MANUAL
COPYRIGHT © 2021 ESSENCY. A GT COMPANY. ALL RIGHTS RESERVED.
2, rue J. Gutemberg
85500 Les Herbiers, France
www.essencyhome.com
AFFIX LABEL HERE
N09040000A1 June 2021

32
RECOGNIZE THIS SYMBOL AS AN INDICATION OF IMPORTANT SAFETY INFORMATION
SAFETY INFORMATION 4-8
General Information 4
Important Safety Precautions 6
Transportation & Storage (At Warehouse) 8
Water Quality 8
INSTALLING THE WATER HEATER 9-19
Location and Specifics 9
1. Connecting the Battery 11
2. Connecting the Water Supply 12
3. Electrical Connection 15
4. Filling the Water Heater 17
5. Connectivity 18
OPERATING THE WATER HEATER 20-31
Safety Precaution 20
General Principle of Operation 20
Software Updates 21
User Interface 22
Setting the Water Temperature 25
Heating Modes 26
Temporary Functions 27
Parameter Setting 30
Occasional Refill of the Tank 31
Essency App 31
CARE AND CLEANING 32-34
Draining the Water Heater 32
Flushing the Water Heater 33
Cleaning of the Water Heater 34
Routine Inspection 34
TROUBLESHOOTING & SERVICE 35-43
Troubleshooting Chart 35
Service Parts 38
Service Log 39
Wiring Diagram 40
Warranty 41
Notes 42
Tips for Water Conservation 43
If You Need Help 43
TABLE OF CONTENTS
CONGRATULATIONS!
By purchasing an Essency E55R Electric Water Heater, you have
chosen the most innovative technology in domestic water heating on
the market. Once properly installed, you can relax and enjoy many
years of trouble-free service.
Thanks to their innovative design, Essency water heaters oer a much
longer life span than traditional water heaters, as well as superior
performance for optimal user comfort.
In the following pages you will find information about how to install
and how to operate your water heater, as well as useful tips on how to
reduce water consumption.
PLEASE READ THIS MANUAL CAREFULLY AND KEEP IT WITH THE WATER
HEATER FOR FUTURE REFERENCE
This manual contains all basic directions and recommendations for the installer to ensure proper installation
and adjustment of the water heater. For the owner/operator, it includes the features, operation, safety
precautions, maintenance and troubleshooting of the water heater. It also includes information on service
parts (see end of manual).
All persons who are expected to install, operate or adjust this water heater should read the instructions
carefully so they may understand how to perform these operations. We require that you contact a plumbing
professional for the installation of this water heater.
If you have any specific questions regarding the operation, maintenance, service or warranty of this water
heater please contact the seller from whom it was purchased. If additional information is required, refer to
the Service section of this manual.

54
GENERAL INFORMATION
This electric water heater’s design is certified by UL and listed in accordance with UL 174.
This water heater must be installed in accordance with local codes. In the absence of local codes, install this
water heater in accordance with the N.E.C. Reference Book (latest edition). The warranty for this water
heater is in eect only when the water heater is installed, adjusted, and operated in accordance with these
Installation and Operating Instructions. The manufacturer will not be held liable for damage resulting from
alteration and/or failure to comply with these instructions. This water heater has been designed and certified
for the purpose of heating potable water. The installation and use of this water heater for any purpose other
than the heating of potable water, may cause damage to the water heater and create a hazardous condition
and nullify the warranty. Do not use this appliance if any part has been submerged in water. The plumbing
professional responsible for the installation of this water heater should be contacted to inspect the appliance
and to replace any part of the control system, including thermostat, which has been submerged in water.
Make sure that the rating plate on the water heater is referenced for certainty that the correct voltage is
being supplied to the water heater.
IMPORTANT: Before proceeding, please inspect the water heater and its components for possible damage.
DO NOT install any damaged components. If damage is evident, please contact the supplier where the water
heater was purchased or the manufacturer listed on the rating plate for replacement parts.
FOR YOUR RECORDS
Write the model and serial numbers here:
The model and serial number can be found on the
identification label, located on top of the water heater.
Model #:
Serial #:
Staple sales receipt here.
Proof of the original purchase date is needed to
obtain service under the warranty.
READ THIS MANUAL
This manual contains useful and important
information for proper installation and operation
of your water heater, as well as information and
recommendations for maintenance to ensure that
you will obtain the best performance and life span of
your Essency water heater.
At the end of the manual you will find a
troubleshooting section with diagnostic codes,
which will allow you to solve most common problems.
Your water heater is FCC compliant.
Essency is not responsible for any changes or
modifications not expressly approved by the party
responsible for compliance. Such modifications
could void the user’s authority to operate the
equipment.
NOTE: This equipment has been tested and found
to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits
are designed to provide reasonable protection
against harmful interference in a residential
installation. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may
cause harmful interference to radio communications.
However, there is no guarantee that interference
will not occur in a particular installation. If this
equipment does cause harmful interference to radio
or television reception, which can be determined
by turning the equipment o and on, the user is
encouraged to try to correct the interference by one
or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and
the receiver.
• Connect the equipment into an outlet on a
circuit dierent from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV
technician for help.
This device must be professionally installed.
This equipment complies with FCC’s radiation
exposure limits set forth for an uncontrolled
environment under the following conditions :
This equipment should be installed and operated
such that a minimum separation distance of 20cm
is maintained between the radiator (antenna) and
user’s/nearby person’s body at all times.
This transmitter must not be co-located or operating
in conjunction with any other antenna or transmitter.
SAFETY INFORMATION
READ THE SAFETY INFORMATION
The following defined terms are used throughout
this manual to bring attention to the presence of
hazards of various risk levels or to important product
information. These words mean:
DANGER! An imminently hazardous situation which, if
not avoided, will result in death or serious injury.
WARNING! A potentially hazardous situation which,
if not avoided, could result in death or serious injury
and/or damage to property.
CAUTION! A potentially hazardous situation which,
if not avoided, may result in minor or moderate injury.
NOTICE: Attention is called to observe a specified
procedure or maintain a specific condition.

76
IMPORTANT SAFETY INSTRUCTIONS
Read all instructions before using this water heater.
WATER TEMPERATURE SETTING
DANGER!
Safety and energy conservation are important factors to be considered when selecting the water
temperature setting of your water heater. Water temperatures above 125°F, and above 120°F for households
with small children, disabled, or elderly persons, can cause severe burns or death from scalding. Be sure
to read and follow the warnings outlined on the label pictured below. This label is also located on the water
heater near the user interface.
APPROXIMATE TIME/TEMPERATURE
RELATIONSHIP IN SCALDS
Temperature Time To Produce a Serious Burn
120°F More than 5 minutes
125°F 1½ to 2 minutes
130°F About 30 seconds
135°F About 10 seconds
140°F Less than 5 seconds
145°F Less than 3 seconds
150°F About 1½ seconds
155°F About 1 second
IMPORTANT SAFETY INFORMATION
Read all instructions thoroughly before installing or operating.
WARNING!
This manual provides information on the installation, operation and maintenance of the water heater.
To reduce the risk of property damage, electric shock, serious injury or death, it is important to read the
precautions below, all labels on the water heater, and the safety messages and instructions throughout this
manual.
Be sure to read and understand the entire Installation and Operation Manual before installing or operating
this water heater, and pay particular attention to the Safety Instructions.
A licensed professional must install the water heater in accordance with the instructions in this manual. The
consumer must read the entire manual to properly operate the water heater. Should you have problems
understanding the instructions in this manual, or have any questions concerning installation or operation of
the water heater, please get help from a qualified service technician, or the local electric utility.
WARNING! Proposition 65 California: This product contains chemicals known to the state of
California to cause cancer, birth defects or other reproductive harm.
SAFETY PRECAUTIONS
It is important to know where the circuit breaker is located. Please ask the installer to show you its location
and how to shut it o if necessary. Turn o the circuit breaker if the water heater has been subjected to
overheating, fire, flood or physical damage.
• Read this manual entirely before installing or operating the water heater.
• Use this appliance only for its intended purpose as described in this Installation and Operation Manual.
• Be sure your appliance is properly installed in accordance with local codes and the provided installation
instructions.
• DO NOT attempt to repair or replace any part of your water heater unless it is specifically recommended in
this manual.
All other servicing should be referred to a qualified technician.
NOTICE: Mixing valves may be required by local
codes for reducing point of use water temperature
by mixing hot and cold water in branch water lines. If
required, a mixing valve complying with the Standard
for Temperature Actuated Mixing Valves for Hot
Water Distribution Systems, ASSE 1017 should
be installed. For more details contact a licensed
plumber or the local plumbing authority for further
information.
Water temperature over 125°F can
cause severe burns instantly or death
from scalds. Children, disabled and
elderly are at highest risk of being
scalded. See instruction manual before
setting temperature at water heater.
Feel water before bathing or showering.
Temperature limiting values are available,
please check with your installer.

98
TRANSPORTATION & STORAGE (AT WAREHOUSE)
If needed, the water heater can be transported horizontally, however do not lay nor transport the water
heater with the front side facing down (see pictogram on packaging if not removed). Do not lift or carry
using the front bottom part of the water heater. The water heater should be stored in a dry place, and at a
temperature between 32°F and 140°F.
NOTICE: Long exposure to temperatures above 140°F can cause permanent deformation of the water heater.
In case the water heater is stored without its packaging, the floor’s slope should be less than 7° to prevent the
water heater from falling over.
WATER QUALITY
Proper care for your water heater must include evaluation of local water quality conditions. The water
must be potable, free of corrosive chemicals, sand, dirt, and other contaminants. It is up to the installer
to ensure the water fed to the heater does not contain corrosive chemicals or elements that can aect
operation or damage the heat exchanger. Refer to the table below for the maximum allowable limits of
specific parameters according to the EPA in the Code of Federal Regulations. The installer is responsible for
understanding local conditions pertaining to these and other parameters and treating the water as necessary.
Replacement of the heat exchanger and other components due to damage caused by water quality is not
covered by the warranty.
MAXIMUM LEVEL
Total Hardness Up to 200 mg / L
Aluminum * Up to 0.2 mg / L
Chlorides * Up to 250 mg / L
Copper * Up to 1.0 mg / L
Dissolved Carbon Dioxide (CO2) Up to 15.0 mg / L
Iron * Up to 0.3 mg / L
Manganese * Up to 0.05 mg / L
pH * 6.5 to 8.5
TDS (Total Dissolved Solids) * Up to 500 mg / L
Zinc * Up to 5 mg / L
* Source: Part 143 National Secondary Drinking Water Regulations
WATER SUPPLY PRESSURE
Minimum Water Pressure: 50 PSI (Recommended
60-80 PSI for maximum performance)
Maximum Water Pressure: 150 PSI
When choosing the location of the water heater,
please take into consideration the following
recommendations.
(Disregarding these recommendations will void the
warranty)
LOCAL INSTALLATION REGULATIONS
This water heater must be installed in accordance with
these instructions, local codes, utility codes, utility
company requirements or, in the absence of local
codes, the latest edition of the National Electrical
Code, which can be found in some local libraries or
can be purchased from the National Fire Protection
Association (website link: https://nfpa.org/).
NOTICE: Please be aware that installation of the
water heater in attics in regions where the outside
air temperature is commonly above 105°F (and
therefore attic temperature can be greater than
140°F) could aect the life of your water heater
electronic controls.
INSTALLATIONS IN CALIFORNIA
Seismic Provisions Water heaters shall be anchored
or strapped to resist horizontal displacement due
to earthquake motion. Strapping shall be at points
within the upper one-third (1/3) and lower one-
third (1/3) of its vertical dimensions. At the lower
point, a minimum distance of four (4) inches shall
be maintained above the controls with the strapping.
Do not obstruct any access panels.
LOCATION & WATER
HEATER CLEARANCE
Locate the water heater in a clean dry area as near
as practical to the area of greatest heated water
demand. Long uninsulated hot water lines can waste
energy and water.
Place the water heater in such a manner that the
electric junction box, the overflow line cover, the
upper element cover and the lower access panel can
be removed to permit inspection and servicing such
as removal of elements or checking controls.
The water heater and water lines should be
protected from freezing temperatures.
To allow easy access for operation and maintenance,
we recommend leaving the following clearances
around the water heater: At the front and above
the water heater: 25’’. Left and right: 4''. Back: 2''
provided that the overflow line can be correctly
installed. In case of any doubt, please check your
local codes.
DO NOT install the water heater OUTDOORS. To
ensure its long life, your water heater MUST be
installed indoors.
Never switch o the water heater. If the water
heater is not going to be used for a period of time
please use the “vacation” temporary function. This
will help to avoid damage caused by freezing.
If the water heater is not going to be used for an
extended period of time, and the electric power will
be shut o, drain your water heater completely (see
page 32).
Make certain the floor underneath the water heater
is strong enough to suciently support the weight
of the water heater once it is filled with water.
CAUTION! The water heater should not be
located in an area where leakage of the tank
or connections will result in damage to the
area adjacent to it or to lower floors of the
structure. Where such areas cannot be avoided,
it is recommended that a suitable drain pan,
adequately drained, be installed under the
water heater (See illustration on following page).
INSTALLING THE WATER HEATER

1110
NOTICE: Auxiliary drain pan MUST conform to
local codes. Drain Pan Kits are available from the
store where the water heater was purchased, or any
water heater distributor.
CAUTION! Make certain the floor underneath
the water heater is straight and level, and does
not exceed an angle of 1.2°, or ¼ inch per foot.
INSULATION BLANKETS
Insulation blankets, available to the general public,
for external use on electric water heaters are not
necessary. The purpose of an insulation blanket
is to reduce the standby heat loss encountered
with storage tank heaters. This water heater
meets or exceeds the National Appliance Energy
Conservation Act standards with respect to
insulation and standby loss requirements making an
insulation blanket unnecessary.
The manufacturer’s warranty does not cover any
damage or defect caused by installation, attachment
or use of any type of energy saving or other
unapproved devices (other than those authorized by
the manufacturer) into, onto or in conjunction with
the water heater.
The use of unauthorized energy saving devices
may shorten the life of the water heater and may
endanger life and property.
The manufacturer disclaims any responsibility for
such loss or injury resulting from the use of such
unauthorized devices.
WARNING! If local codes require external
application of insulation blanket kits the
manufacturer’s instructions included with the
kit must be carefully followed.
CAUTION! If local codes require the
application of an external insulation blanket
to this water heater, pay careful attention to
the following so as not to restrict the proper
function and operation of the water heater:
• DO NOT cover the operating or warning labels
attached to the water heater or attempt to relocate
them on the exterior of insulation blanket.
• DO NOT apply insulation to the top of the water
heater. This could interfere with the safe operation
of the electrical junction box.
• DO NOT cover the access panel(s) to the
thermostat(s) and heating element(s).
• DO NOT cover lower access lid of the unit. It will
result in an overheating of the electronic controls.
• Inspect the insulation blanket frequently.
A. Width of water heater plus 2” min (22+2”)
B. Depth of water heater plus 2” min (26+2”)
C. Height, maximum 4”
To open drain, line should be
at least 3/4” ID and pitched
for proper drainage.
a
Floor
a < 1.2° (in any directions)
1. CONNECTING THE BATTERY
As a back-up in case of power failure, the water heater is equipped with a lithium-ion battery located behind
the lower lid of the unit. To connect this battery, before powering the unit, follow the steps as indicated on
the illustration below:
NOTICE: When reinstalling the cover, do not over-tighten the screws. The applied torque shall not exceed
1.1 lb.ft. After battery connection, the front cover is to be put back on, and left on, for the duration of the
installation.
NOTICE: The battery is intended to be used as an emergency back-up only, in case of power failure, and will
allow you to use the amount of hot water available in your tank at the time of power failure. It will not operate
the water heater elements, but only the recirculating pump at a moderate flow (corresponding to a shower
flow). Neither the touchscreen display nor the WiFi will be operational. It is not meant to be used continually.
NOTICE: The water heater's internal drain valve is closed by default from the
factory. Before proceeding with 'Step 4, Filling the Water Heater', ensure the
valve is still closed. In the closed position, the red valve handle will be facing out.
In the open position, the red handle will be facing right.
2) Remove the Lid
1) Unscrew the 4 screws
3) Connect the battery
Close
Open

1312
2. CONNECTING THE WATER SUPPLY
TYPICAL INSTALLATION
WATER SUPPLY CONNECTIONS
Refer to the illustration above for suggested typical installation. The installation of unions or flexible
connectors is recommended on the hot and cold water connections so that the water heater may be easily
disconnected. To tighten the water connectors, please use a back-up wrench. For ease of maintenance, we
strongly recommend to install service valves in inlet and outlet water circuits.
TIP: Water connections are located further to the front of the unit than many other storage water
heaters. Plan accordingly. For example, longer water flexes may be required.
FILTER
Before connecting the cold water supply to the unit, check that the filter is still well installed in the cold inlet
brass fitting.
To electric
distribution panel
Union
Union
Hot water
outlet to fixture
User
Interface
Electrical junction box
(use only copper conductors)
To cold
water supply
Upper Element
Access Panel
Overflow line
to suitable open drain
Drain Valve
(Behind the cover)
Shutoff
valve
Auxiliary drain pan,
Height 3" maximum
Shutoff
valve
OVERFLOW LINE CONNECTION
For ease of installation, the protective cap can be taken o by removing the 2 screws.
DO NOT over-tighten the connector. The applied torque shall not exceed 2 lb.ft. Make sure the overflow
line opening is at least 6’’ from the ground.
WARNING! In any case, water shall be fully drained to a suitable floor open drain. Respect the correct
slope so that no water can be trapped in the overflow line.
WARNING! Use a ¾’’ MNPT fitting compliant with ASTM D2846 or ASME B16.22 or other standard,
and ensure an inner diameter not less than ⁄’’ (0.625’’).
WARNING! The overflow line piping shall have an inner diameter not less than ¾’’.
WARNING! The protective cap is to be reinstalled after connection of the overflow line.
T/P VALVE
Unlike other tank water heaters, the water in the tank of the Essency E55R is at atmospheric pressure. Per
its construction, UL has evaluated that this water heater does not need a T/P valve. However please refer to
your local codes for specific local requirements.
EXPANSION TANK
This water heater operates at atmospheric pressure. No expansion tank is therefore required. However please
refer to your local codes for specific local requirements.
To electric
distribution panel
Union
Union
User
Interface
Electrical junction box
(use only copper conductors)
To cold
water supply
Upper Element
Access Panel
Overflow line
to suitable open drain
Shutoff
valve
TP Valve
Thermal Expension
Tank (if required)
Hot Water
outlet to fixture
Shutoff
valve

1514
3. ELECTRICAL CONNECTION
We require that you contact a plumbing professional for the electrical installation of the water heater. A
separate branch circuit with copper conductors, overcurrent protective device and suitable disconnecting
means must be provided by a qualified electrician. All wiring must conform to local codes or latest edition of
National Electrical Code ANSI/NFPA 70. The water heater is completely wired to the electrical connection
box located at the top of the water heater. An opening for 1/2” electrical fitting is provided for field wiring
connections. If more than 3 wires need to be connected, for instance for O-Peak installations, the use of a
½” to ¾” adapter is recommended.
The voltage requirements and wattage load for the water heater are specified on the rating plate located at
the top of the water heater.
For ease of installation, it is allowed to temporarily remove the ground plate.
DANGER! Make sure the ground plate is correctly put back in place and the screws are well tightened
(torque 1.5 lb.ft).
The branch circuit wiring should include either:
1. Metallic conduit or metallic sheathed cable approved for use as a grounding conductor and installed with
fittings approved for the purpose.
2. Non-metallic sheathed cable, metallic conduit or metallic sheathed cable not approved for use as a ground
conductor shall include a separate conductor for grounding. It should be attached to the ground terminals
of the water heater and the electrical distribution box.
CAUTION! The presence of water in the piping and water heater does not provide sucient
conduction for a ground. Non-metallic piping, dielectric unions, flexible connectors etc. can cause the
water heater to be electrically isolated.
Conduit Connector
Ground Screw
Wire Connections
Junction box Cover
Ground Plate
DRAIN PAN
NOTICE: We recommend the use of a drain pan, especially if the water heater is installed in the attic.
HARD WATER INSTALLATION
Based on your water conditions, the heat exchanger may need to be flushed. Contact Essency for more
information. See the Care and Cleaning section on how to proceed (see page 33).
NOTICE: DO NOT apply heat to the hot or cold water connections. If sweat connections are used, sweat
tubing to adapter before fitting adapter to the water connections on the water heater. Any heat applied to
the water supply fittings will permanently damage them or other plastic parts.
NOTICE: Make sure the overflow line is well connected and not obstructed.
NOTICE: DO NOT put any liquid other than water, without any additives, into the tank of the water heater.

1716
O-Peak
Nominal Connection
O-Peak—Electronics Separated Electronics Separated
4. FILLING THE WATER HEATER
NOTICE: Remain close to the water heater during the filling process, to avoid any potential damage due to
faulty installation or maintenance.
1. Open the shut-o valve on the cold water supply line.
2. Make sure the water heater is electrically
supplied. The unit will turn on and a white circle
will appear in the center (the (Confirm) button).
3. Press the (Confirm) button to activate the
interface. The word “Fill” will appear. The unit will
then try one short 30-second filling attempts
and will wait 30 minutes for further instructions.
If no action is performed meantime the warning
code 225 will be displayed.
4. Press the (Confirm) button to start the filling
process. The unit will start filling automatically.
The water drop icon animation will light up during
this process. Once the correct water level is
reached, the unit will automatically stop the
filling process.
5. If you need to stop the filling process, press the
(Confirm) button. The unit will automatically
stop. If the minimum water level needed for
operation has not been reached, the word “Fill”
will appear again. Restart step 5 to resume filling
the unit.
SMART
SINGLE PHASE WIRING
BRANCH CIRCUIT SIZING AND WIRE SIZE GUIDE (use copper conductors only)
Water Heater Wattage
(W)
Power Supply Voltage
(V)
Recommended Over
Current Protection*
(A)
Copper Wire Size AWG
recommended**
4500 240 25 10
*Fuse or circuit breaker amperage rating
**Branch circuit sizing and wire size based on National Electric Code (N.E.C. Table 310-16 at 167°F)
ELECTRICAL TERMINAL BOX (SHUNT CONNECTION)
• To avoid any electrical problem, please remove the shunts if they are not useful for your connection.
• Or place the shunts corresponding to your electrical connection, as shown below :
Standard 2-phase grounded
connection
T02 Terminal - Ph 1 -
208VAC/240VAC - 19A.
Phase 1 common to heating
elements and electronic
control
T05 Terminal - Ph 2 -
208VAC/240VAC - 19A.
Phase 2 to heating elements
and electronic control
Ground connection
Wire separately the heating elements,
in relation with an O-Peak program.
T02 Terminal - Ph 1 -
208VAC/240VAC - 19A. Phase 1
common to heating elements and
electronic control
T04 Terminal - Ph 2 -
208VAC/240VAC - 19A. Phase 2,
PERMANENT, to upper elements and
electronic control
T05 Terminal - Ph 2 O Peak
- 208VAC/240VAC - 19A. Phase
2, from the O-Peak meter, to lower
element only
Ground connection
Wire separately the elements
and electronic control in case
of non permanent power
supply to the water heater and
an O-Peak program.
Refer to O-Peak and Elec-
tronics Separated sections.
Wire separately the elements and
electronic control in case of non
permanent power supply to the water
heater
T01 Terminal -
Ph1'-120VAC/240VAC-50W max.
Phase 1 to electronic control
T03 Terminal -
Ph2'-120VAC/240VAC-50W max.
Phase 2 to electronic control
T02 Terminal - Ph1-
208VAC/240VAC-19A. Phase 1
common to heating elements
T05 Terminal - Ph2-
208VAC/240VAC-19A. Phase 2 to
heating elements
Ground connection

1918
INSTALLATION CHECKLIST
A. Water Heater Location
Close to area of heated water demand.
Indoors and protected from freezing temperatures.
Area free of flammable vapors.
Provisions made to protect area from water damage.
Meets requirements in location and water heater clearance section.
B. Water Supply
Water heater completely filled with water.
Air purged from water heater and piping.
Water connections tight and free of leaks.
C. Overflow
Overflow line correctly connected and protected from freezing.
D. Wiring
Power Supply voltage agrees with water heater rating plate.
Branch circuit wire and fusing or circuit breaker of proper size.
Electrical connections tight and unit properly grounded.
E. Connectivity
Update water heater's software.
5. CONNECTIVITY
Upon completion of the previous steps, it is mandatory for the installer to upgrade the software of the water
heater to the latest version. Upgrading can be done by the installer, using a mobile phone (pairing with the
water heater is not required), as follows:
1. Download and install the “MyEssency” mobile application from your preferred mobile application store.
2. Launch the mobile application and create an account.
3. Click on ‘Change my WiFi settings’ and follow the steps on the mobile application to connect the water
heater to a WiFi network.
4. Once the procedure is completed, go to the settings menu on the water heater’s user interface, (see page
30) then Upd. After confirmation, the software upgrade will be started.
5. When the software upgrade is completed successfully, the progress indication on the water heater will
be displaying ‘100’, and the WiFi connection must be turned o: SEt -> Con -> Off (see page 30 for
Parameter Settings details). In case an issue occurs during the software upgrade, ‘Err’ will be displayed and
the procedure should be repeated.

2120
OPERATING THE WATER HEATER
SAFETY PRECAUTIONS
1. DO turn o power to water heater if it has been subject to overheating, fire, flood, physical damage.
2. DO NOT turn on water heater if cold water supply shut-o valve is closed.
3. If there is any diculty in understanding or following the Operating Instructions or the Care and Cleaning
section, it is recommended that a qualified person or serviceman perform the work.
GENERAL PRINCIPLE OF OPERATION
HOW DOES IT WORK?
Your E55R is the first water heater of its kind: it brings you all the advantages of tankless combined with a
tank: that’s how we achieve performance and durability.
Your Essency water heater works a bit dierently from other water heaters: you are not consuming the
55 gallons of water that is stored in the tank, but this “static water” is only acting as a heat source. When
you draw hot water, the domestic water is run through a heat exchanger, where the heat from the water in
the storage tank (heated at up to 160°F, depending on the selected operation mode) is instantaneously
transferred to the domestic water, to obtain water at the desired set temperature. All you have to do is to
select the temperature of the water you want to get out of the faucet (you can set from 104°F to 132°F)
and Essency does the rest!
•Essency uses two electric heating elements to heat the static water, one in the lower section of the tank,
and one in the upper section.
•The tank is only filled once, during initial installation of the unit, and the water remains in there throughout
the life of the water heater with a refilling of few gallons per year. This greatly reduces the formation of scale
inside the tank, thus increasing the life of the tank itself and key components, such as the heating elements.
•You can control your water heater directly on the unit using the user interface, or from your smartphone
with the Essency App, which can be downloaded on the Apple and Google stores.
SOFTWARE UPDATES
It is important to always keep the software of your water heater updated with the latest available version.
Software updates may be needed to address cyber security issues, fix bugs, improve existing features and/
or install new functionalities, help to reduce energy consumption, and optimize the hot water production
process.
HOW DO I MAKE SURE THAT MY SOFTWARE IS UPDATED REGULARLY?
1. Software updates are done automatically, provided that your water heater is connected to a WiFi network,
and you have downloaded the Essency App on your smartphone or tablet. Every time a software update
has taken place, you will be notified via the App.
You can also manually upgrade your water heater by following following steps:
�Open your MyEssency mobile application
�Select the water heater to upgrade
If a software upgrade is available, a blue cloud icon will be displayed. Click on this icon
and follow the instructions.
In addition, the App will allow you to control the heating modes and temporary functions, and get real time
information about the status of your water heater, including any fault messages. For more details on the App,
please refer to the section “App” (see page 31).
NOTICE: Without the App, the water heater CANNOT be connected to the WiFi.
2. In case you decide to uninstall the App, after having connected the water heater, your water heater will
remain connected to the WiFi network, and software updates will still be done automatically. However you
will not be notified of any updates. Furthermore, you will not have access to any other features of the App.
WHAT HAPPENS IF I DO NOT CONNECT MY WATER HEATER TO WIFI?
If you do not connect your water heater to a WiFi network, no software updates will happen throughout
the life of the machine, which may aect the functioning and performance of your water heater over time.
Furthermore, you will not benefit from any improvements or new functionalities that may become available
in the future. Therefore, in order to get the most out of your water heater, we strongly recommend to
connect the water heater.

2322
USER INTERFACE
FIGURE DESCRIPTION
1 Status indicator
2 Active mode
3 Temperature unit
4 Alphanumeric display
5 WiFi status
6 Fault indicator
7 Capacity indicator
B1 Boost (temporary function)
B2 Vacation (temporary function)
B3 Water Saver (temporary function)
B4 Multi Function button
B5 + Button
B6 - Button
B7 Confirm button
Fig 1. Status Indicator
The color of the banner indicates the heating mode
or the water heater status:
•Light blue: Electric version
•Red: An alarm has been detected
•White: Service menu
Fig 5. WiFi Status
•The indicator is ON when the WiFi is
connected.
•The indicator flashes when the water heater is
searching for WiFi.
Fig 6. Fault Indicator
•The indicator is ON when a fault is in progress
(see troubleshooting on page 35).
•The indicator is OFF when there is no fault in
progress.
A. Heating of the water:
As water begins heating up, segments of the water drop icon depicted below become lit in ascending order,
beginning from the top segment. The more segments that are lit, the more hot water is available. When all 4
segments are continuously lit, the maximum quantity of hot water is available.
B. Hot water quantity available:
The drop indicates the amount of hot water available for use.
The Essency E55R is equipped with two heating elements, one at the bottom of the tank and one at the top,
that operate independently. When hot water is drawn, the water heater will always start by switching on the
upper element first, so as to ensure that hot water is available as quickly as possible. When the top third of
the water in the tank has reached its desired temperature, the electronics will switch o the upper element
and switch on the lower element, until all the water in the tank is fully hot.
Fig 7. Capacity Indicator
A. The water drop icon indicates the quantity of hot water available.
- In Smart Mode: Up to 8 back-to-back showers (for 8 min showers at 2GPM and 100°F)
- In Heat+ Mode: 9 back-to-back showers
B. The animation on the drop indicates if it is heating or filling.
0% 25% 50% 75% 100%

2524
GETTING STARTED | SCREENSAVER AND HOMEPAGE
Home Screen Inactive State
Home Screen Active State
SMART
Press the (Confirm)
button to activate the
screen
SETTING THE WATER TEMPERATURE
To set the temperature, use the + and – buttons on
the user interface until the desired temperature is
shown, and press the “confirm” button.
1. To set the temperature, press and hold the (-) or (+)
button.
2. Press the (-) button to decrease the temperature
OR press the (+) button to increase the
temperature.
3. Press the (Confirm) button to validate the
temperature.
WATER TEMPERATURE SET POINT
Safety and energy conservation are factors to be
considered when selecting the water temperature
setting of the water heater’s thermostats. The lower
the temperature setting, the greater the savings in
energy and operating costs.
Water temperatures above 125°F can cause severe
burns or death from scalding. Be sure to read and
follow the warnings outlined in this manual and on the
label on the water heater.
The electronic control allows the water temperature
to be set from 104°F to 132°F. Please note that this
is the temperature of the water delivered at your
faucets, but not the temperature of the static water
stored inside the tank (this temperature is defined by
the Mode you chose to operate in).
Refer to the chart as a guide in determining the proper
water temperature for your home.
APPROXIMATE TIME/TEMPERATURE
RELATIONSHIP IN SCALDS
Temperature Time To Produce a Serious Burn
120°F More than 5 minutes
125°F 1½ to 2 minutes
130°F About 30 seconds
135°F About 10 seconds
140°F Less than 5 seconds
145°F Less than 3 seconds
150°F About 1½ seconds
155°F About 1 second
Table courtesy of Shriners Burn Institute
DANGER! Water temperatures over 125° F can cause severe burns or scalding. Households with small
children, disabled, or elderly persons may require a 120°F or lower temperature setting to prevent contact
with HOT water.
NOTICE: in case of very hard water, setting the temperature at more 125°F can increase the risk of scale
build-up.
1
2
SMART
3

2726
BOOST
The boost temporary function will heat up the tank
to its maximum temperature and will keep it hot
until the function is deselected.
1. Press the (Boost) button to activate the boost
temporary function.
2. Press the (+) button to increase the number of
hours wanted in boost mode OR press the (-)
button to reduce the number of hours wanted in
boost mode.
3. Press the (Confirm) button to validate the
number of hours and to launch the boost mode
OR press the (Boost) button to exit the boost
menu without confirming the number of hours
and to launch the boost temporary function.
4. The (Boost) button will blink to indicate that the
boost function is active.
The default time is set to 3 hours and can be
increased up to 48 hours. The boost temporary
function is deactivated by changing the time to
OFF. To do so, press the (-) button until OFF is
displayed. Then press the (Confirm) button.
1
3
2
TEMPORARY FUNCTIONS
The water heater features a number of temporary functions, which allow you to temporarily override the
active heating mode for a selected period of time. At the end of the selected period of time, the water heater
will return automatically to the initial setting.
A temporary function can be interrupted at any time before the end of the selected period by selecting
OFF. To do so, select the appropriate temporary function (Boost / Vacation / Water Saver) and press the (-)
button until OFF is displayed. Then press the (Confirm) button.
HEATING MODES
SMART
This is the default mode in which the water heater
operates. In Smart mode the electronic control
system will automatically manage the 2 heating
elements, according to the quantity of hot water
used, so as to optimize delivery and consume
the least amount of energy. In Smart mode the
set temperature of the upper element is 152 °F,
whereas the lower element will heat between 113 °F
and 152°F.
Smart is the recommended mode for families of 4 or
5 with average water use, and will allow for a FHR of
up to 80 gallons.
HEAT +
The Heat+ mode optimizes performance over
energy savings, allowing the water heater to produce
larger quantities of hot water. In Heat+ mode, both
heating elements are heated at 158°F. This mode
allows the water heater to deliver, in the same
conditions as the FHR test, 100 gallons of hot
water.
CUSTOM (Available in future update)
The Custom mode allows you to program a typical
weekly cycle of use: you can select the Smart mode
or Heat+ mode for a certain period of time by one
hour increments, depending on your hot water
requirements.
NOTICE: Never switch o the water heater. If the
water heater is not going to be used for a period of
time please use the vacation temporary function
(see page 28).
TO SELECT A HEATING MODE:
1. Quickly tap on the (Multi Function) button.
2. Press (+) or (-) to navigate between the 3 modes
(Smart / Heat+ / Custom). The selected mode
will blink.
3. Press the (Confirm) button to confirm the
selected mode.
4. Once the heating mode is selected, the
homepage will appear following your choice.
1
2
3
HEAT+ CUSTOM SMART 4

2928
SMART
VACATION
The vacation function aims to keep the tank at low
temperature to save energy while preventing water
from freezing. In this mode, only the low heating
element is used to keep the tank at a minimum fixed
temperature. Vacation mode can be programmed
by the user for a fixed duration in days or for an
infinite period of time.
1. Press the (Vacation) button to activate the
vacation temporary function.
2. Press the (+) button to increase the number of
the days wanted in vacation temporary function
OR press the (-) button to reduce the number of
the days wanted in vacation temporary function.
3. Press the (Confirm) button to validate the day
number and to launch the vacation temporary
function OR press the (Vacation) button to
exit the vacation menu without confirming the
number of days.
4. The (Vacation) button will blink to indicate that
the vacation function is active.
1
3
2
Drawing hot water from any faucet while in vacation temporary function, will automatically turn it o, even
before the end of the set period, and the water heater will return to its initial setting. To avoid the unwanted
deactivation of the vacation mode, make sure the set cycles of your appliances have already been performed,
such as a dishwasher load.
To ensure that hot water is available when you get back home, make sure to program the end 3 hours before
your return. The default time is set to 7 days, and can be incremented to 99 days or infinite (INF). The
vacation temporary function is deactivated by changing the time to OFF. To do so, press the (-) button until
(OFF) is displayed. Then press the (Confirm) button.
SMART
WATER SAVER
This function is intended to limit the time spent
in the shower by an overly indulgent user. It was
specifically designed for parents of teenagers, to
act like a remote control to turn o the hot water
if they're spending too much time in the shower. It
is not only a matter of peace at home, but also of
water conservation, hence its name.
Activating the water saver temporary function will
gradually reduce the hot water temperature for 1
minute until reaching cold water. By default, the hot
water will return only 5 minutes later, but can also
be manually set between 1 and 30 minutes using the
(+) or (–) buttons while in the function.
1. Press the (Water Saver) button to activate the
water saver temporary function.
2. Press the (+) button to increase the number
of minutes without hot water OR press the
(-) button to decrease the number of minutes
without hot water.
3. Press the (Confirm) button to validate the
number of minutes and to launch the water saver
temporary function OR press the (Water Saver)
button to exit the menu without confirming the
number of minutes of hot water.
4. The (Water Saver) button will blink to indicate
that the water saver function is active.
Please note that there will be no hot water in the
house during the time selected, unless you cancel
the function at any time by setting it to OFF.
1
3
2

3130
OCCASIONAL REFILL OF THE TANK
1. MANUALLY REFILL YOUR WATER
HEATER AFTER MAINTENANCE
During the life of the water heater there may be
occasions where the tank has to be refilled manually,
such as after draining the tank in order to perform
maintenance on the static water circuit, or change a
heating element or the heat exchanger.
For the filling procedure, please refer to section 4
of the installation guidelines (filling the water heater)
and follow the procedure.
2. AUTOMATIC REFILL OF YOUR
WATER HEATER AND LEAK
DETECTION
Due to water expansion and condensation, your
water heater will lose tiny quantities of water each
day, through the overflow drain. Per month, it is
estimated to lose less than a quarter of a gallon—
which is how much a traditional electric tank water
heater loses per day.
Your water heater will compensate for this lost
volume by automatically refilling to reach the
desired water level. It will activate an electrovalve
approximately once every 3 months, during which
you will hear water running inside the tank for a few
seconds.
Your water heater will also detect if it's refilling too
frequently, which would indicate that there is a
leak on the static water circuit or the tank and will
therefore alert you. See Troubleshooting section.
ESSENCY APP
Thanks to the MyEssency App, it is possible to
control one or several Essency water heaters from
your smart phone.
The App can be downloaded at www.essencyhome.
com or from the Apple and Google stores.
Once installed, please follow the instructions.
Should you encounter any problem during the
connection procedure through the App, please
reboot the electronics by using the Reboot function
described in the Parameter Settings section (see
page 30). Then start the procedure again.
The App oers you a variety of functionalities such as:
•Status monitoring: active heating mode,
temperature settings
•Get information on available quantity of hot water
•Change active Heating Mode
•Activate a Temporary Function (Boost/Vacation/
Water saver)
•Get consumption statistics
•Alarm information
•Access to online help and many more features…
NOTICE: For safety purpose, changing the
temperature set point from the App is not allowed.
PARAMETER SETTINGS
To explore the useful menus, make a long tap on the (Multi Function) button (B4) for 2 seconds (1).
You can navigate through the menus described below by using (+) and (-) button, validate with the (Confirm)
button, and go back with short tap on the (Multi Function) button.
•Settings (shown as SEt)
úConnection (shown as Con)
On (shown as on)
O (shown as oFF)
Pairing (PAir)
úUnit (shown as Unit)
Temperature (shown as tENp)
Flow (shown as FLoV)
úReboot (shown as rbt)
úSoftware Version (shown as Soft)
úSoftware Update (shown as UPd)
úOptions (shown as Opt)
Disable the battery (shown as bAtt)
•History (shown as Hist)
•Service (shown as SrV)
úInfo (shown as Info)
See below
úMaintenance (shown as NAint)
See below
úTest (shown as tESt)
Self-test (shown as St)
•Options (shown as OpT)
úDisable the battery (shown as bAtt)
In the service menu, you will be able to check the status and act on the sensors and actuators of your water
heater. These options allow you to perform a self-diagnostic of your water heater for troubleshooting
if needed. The "Test" section is meant for the software to evaluate some functionalities (the "Self-test"
function controls the state of the relays).
The functions and sensors available are the following:
1
SMART
t1: Domestic Cold Water Temperature (DCWT)
t2: Domestic Hot Water Temperature (DHWT1)
t3: Domestic Hot Water Temperature (DHWT2)
t4: Static Hot Water Temperature (SHWT)
t5: Static Hot Water Temperature Lower (SHWTL)
t6: Static Hot Water Temperature Upper (SHWTU)
t7: Battery temperature
F1: Water Flow (Tenth of Gallons per Minute)
F2: Water volume since the last start-up (Hundreds of Gallons)
1. The status of the heating element is either ON or OFF (shown respectively as on or oFF)
2. The status of the level sensors is either Low or High (shown respectively as Lo or Hi)
3. The status of the valve is either Open or Closed (shown respectively as OPn or Clo)
HEl: Lower Heating Element1
HEU : Upper Heating Element1
P1: Pump Command (%)
LSL: Lower Level Sensor2
LSU: Upper Level Sensor2
u1: Status of the filling valve3
Atv: Status of the pump valve3
rSt: Erase the alarm history

3332
6. Pour 4 gallons (15 liters) of undiluted virgin, food
grade, white vinegar into pail.
7. Place the end of the hose to the pump inlet (H1)
into the cleaning solution.
8. Open V3 and V4.
9. Operate the pump and allow the vinegar to
circulate through the water heater for at least 1
hour at a rate of 4 gallons per minute (15 liters per
minute).
10. Turn o the pump.
11. Rinse the vinegar from the water heater as
follows:
a. Remove the free end of H3 from the pail and
place it in sink or outside to drain.
b. Close V4 and open V2. Do not open V1.
c. Allow water to flow through the water heater
for 10 minutes.
d. Close V2. When unit has finished draining,
remove the inlet filter at the cold water line
and clean out any residue. Place the filter
back into its place and open V2.
e. Close V3 and open V1.
12. Disconnect all hoses
13. Dry the potential wet surface then restore
electrical power to the water heater.
FLUSHING THE WATER HEATER
Based on your water conditions, the heat exchanger may need to be flushed. Contact Essency for more
information. Save time and money by installing service valves in outlet and inlet water circuits of the water
heater.
HOW TO PROCEED:
1. Disconnect electrical power to the water heater.
2. Disconnect the battery (see page 11).
3. Place towels around hot water outlet and cold
water inlet to avoid water on your water heater.
4. Close the shuto valves on both the hot water
and cold water lines (V1 and V2).
5. Connect pump outlet hose (H2) to the cold
water line at service valve (V4).Connect drain
hose (H3) to the hot water line at service valve
(V3) and place the free end of H3 into the
solution.
CARE AND CLEANING
DRAINING THE WATER HEATER
To perform certain acts of maintenance or repair, it
may be necessary to drain the tank.
In order to drain the water contained inside the tank,
fix a garden hose to the drain valve on the water
heater and direct the stream of water to a drain.
Once the water supply valve of the water heater
is closed, you can open the drain valve. The water
heater's internal drain valve is closed by default from
the factory. In the closed position, the red valve
handle will be facing out. In the open position, the
red handle will be facing right.
2) Remove the Lid
3) Connect the drain line
1) Unscrew the
4 screws
4) Open the drain valve
In order to drain the water contained inside the heat exchanger, remove the heat exchanger by removing
the four clips and disconnect heat exchanger from the water heater. Empty the contents of the device in a
sink. When reassembling the heat exchanger, check that the o-rings and other parts near the exchanger are
in good condition. When reinstalling the cover, do not over-tighten the screws. The applied torque shall not
exceed 1.1 lb.ft.
CAUTION! Shut o power to the water heater before draining your unit.
DANGER! Before manually operating the drain valve, make certain no one will be exposed to the hot
water released by the valve. The water drained from the tank may be hot enough to present a scald
hazard and should be directed to a suitable drain to prevent injury or damage.
1. Remove the 4 clips
2. Remove the heat exchanger
2
1
1

3534
TROUBLESHOOTING CHART
Before calling for service, you can find below some troubleshooting tips. To go further, our website can help
you to find the root cause of most problems which could be encountered. Most of the time you won’t need
any mechanical dismounting action to find where the problem comes from.
If the status indicator is red, an alarm has been detected. This alarm is still active if the fault indicator in ON.
To display this alarm, perform a short push on the confirm button once the homepage is displayed, this alarm
number allows you to self-diagnostic your water heater on the dedicated section of our website.
Once the alarm is not active anymore you can acknowledge it by making a long push on the confirm button.
WARNING CODE EXPLANATION WHAT TO DO
101 Water outlet
temperature too high.
•The water heater adapts its behavior
through the years to adjust its temperature,
if this warning appears too regularly see our
website for more information.
102 Inside temperature of the
water heater above 185°F.
•A failure occurs regarding the activation of
the heating elements, see our website for
more information.
103-OH
Water outlet temperature
reached too high a
temperature too fast. If this
code is set, the water heater
won’t deliver hot water before
your manual confirmation.
•Perform a long push on the central button
to quit the secured active heating mode.
The water heater adapts its behavior
through the years to adjust its temperature,
if this warning appears too regularly see our
website for more information.
211 to 216 Temperature sensor error .
•Perform a reset of your water heater
through the touch screen control.
•If the error remains, a temperature sensor
of your water heater needs to be replaced;
refer to website for the exact component.
TROUBLESHOOTING & SERVICE
CAUTION! For your
safety, do not attempt
to repair thermostat(s),
heating elements, or
electrical wiring. Refer
such repairs to a qualified
service technician.
ROUTINE INSPECTION
When installed properly and operated in normal
standard conditions, your water heater does not
require any periodic maintenance.
However, like any electric appliance, we recommend
that you inspect your unit periodically for
malfunctions or defects.
WE RECOMMEND:
•Open the drain valve once a year to make sure it
is moving freely (be careful with the hot water going
out).
•Check the cold water inlet filter. If clogged, remove
and clean it then put it back in place.
•Check the absence of water drops on the plate
heat exchanger.
•Check that the overflow line is not clogged.
Please contact your contractor if you detect any
abnormal condition.
CONDENSATION
Condensation can form on the tank when it is first
filled with water. Condensation might also occur
with a heavy water draw and very cold inlet water
temperature.
This condition is not unusual, and will disappear
after the water becomes heated. If, however, the
condensation continues, examine the piping and
fittings for possible leaks.
WATER HAMMER
Rapid closing of faucets or solenoid valves in
automatic water using appliances can cause a
banging noise heard in a water pipe. Strategically
located risers in the water pipe system or water
hammer arresting devices can be used to minimize
the problem.
CLEANING THE WATER HEATER
In order to clean the outside surfaces of the water heater, use a damp soft/microfiber cloth. Do not use any
aggressive chemicals/cleaning products/tool. Avoid any direct water projection to the water heater (garden
hose). Do not spray water on the active parts of the water heater.
Inlet filter to clean

3736
PROBLEM
WITHOUT
WARNING CODE
POSSIBLE CAUSES WHAT TO DO
Water is too hot The temperature set is too high.
•Decrease the temperature setpoint (See the
temperature regulation of the water heater
section of this manual).
Setpoint can’t be
changed Somebody is using hot water. •The setpoint cannot be changed if someone is using the hot water, to avoid scald hazards.
Water leaks
CAUTION!
Cut the water and
electricity supply in
this situation to avoid
any hazard. Leaking
water may be hot.
Leakage from threaded
connection.
•The gaskets used don’t need a high torque to
keep the sealing; tighten the connection a
bit more to stop the leak.
•If the leak remains or comes from
somewhere else contact your local plumber.
CAUTION! For your safety DO NOT attempt repair of electrical wiring, temperature sensor, electronic
control, heating elements or other safety devices. Refer repairs to qualified service personnel.
WARNING! The static water in the tank may be hot, therefore any intervention on the static water
circuit can cause burns.
WARNING! After every maintenance intervention, perform a water drawing of approx 2 gallons to
evacuate potentiallly too hot water, and thus avoid the risk of burns.
NOTICE: when reinstalling any parts or covers, do not over-tighten the fixation screws. For more
information on the applicable torque, please refer to the maintenance section of our website at www.
essencyhome.com. If you are not sure of your understanding regarding the instructions provided in our
website or any terms within them, please contact a qualified service professional.
224 to 235 Component fault.
•Perform a reset of your water heater
through the user interface.
•If the error remains, a component of your
water heater may need to be replaced, see
website for the exact one.
PROBLEM
WITHOUT
WARNING CODE
POSSIBLE CAUSES WHAT TO DO
Not enough
or no hot water
Electric supply may be o.
•Make sure your water heater is electrically
connected and the circuit breaker is not
pulled.
•Contact the local electric utility if your
house is not electrically supplied.
•Contact your plumber to check the electric
connection of your water heater.
Water usage may exceed the
capacity to deliver the water at
the desired temperature.
•Make sure no faucet is inadvertently open.
Water usage may have exceeded
the capacity of the water heater.
•Wait for the water heater to recover after
an abnormal high demand.
•Switch to a more adapted mode if it
happens regularly (See the dierent modes
available).
The temperature set point may
be set too low.
•See the temperature regulation of the
water heater section of this manual.
The heat exchanger is scaled.
•In case of very hard water, the heat
exchanger of your water heater may need to
be descaled.
•If none of the previous causes is responsible for this problem, see our website
for more information.

3938
SERVICE LOG
Please record any replacement of components below to allow proper tracking of the water heater status.
DATE PART NUMBER OBSERVATION
SERVICE PARTS
Service parts may be ordered through your plumber or local distributor.
When ordering repair parts always give the following information:
1. Model, Serial, and Product Numbers
2. Item Number
3. Parts Description
The procedure to order service parts can be found on our website at www.essencyhome.com