Eccotemp Systems LLC EAQ10024 Owner Manual

English

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WARNING: If the information in these

instructions is not followed exactly, a re or

explosion may result causing property
damage, personal injury or death.

• Do not store or use gasoline or other

ammable vapors and liquids in the
vicinity of this or any other appliances.

• WHAT TO DO IF YOU SMELL GAS

- Do not try to light any appliances.

- 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 re department.

• Installation and service must be performed
by a qualied installer, service agency or

the gas supplier.

PLEASE NOTE: i12 IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT

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PLEASE VERIFY THIS WATER
HEATER IS RIGHT FOR YOU.

Congratulations on your purchase of the i12 Gas Tankless Water Heater.

THINGS YOU SHOULD KNOW ABOUT THIS WATER HEATER

English

INCOMING WATER

TEMPERATURE

ZONE 1

ZONE 2

ZONE 3

ALASKA

MODEL

RECOMMENDED USES HOUSEHOLD SIZE

• Cabins, Apartments,
Townhomes and Tiny Homes

• Zones 2 and 3

(See map below)

37 - 47º F

52 - 62º F

67 - 77º F

showering and another washing

1-2 APPLICATIONS

Example: One person

dishes at the same time

OR+ +

showering and another washing

clothes at the same time

HAWAII

FLOW

U/M

80 75 70 65 60 55 50 45 40 35 30

TEMPERATURE RISE (IN DEGREES

Example: One person

TEMPERATURE CONTROLS

AUTOMATIC TEMPERATURE CONTROLS

The temperature is set from the front
control panel and automatically adjusts
at your sink or shower.

(See page 30 for more info)

STANDARD

APPLICATION FLOWS

1.0-2.0 GPM 1.5-2.0 GPM

4.0 – 5.0 GPM

)

1.0 – 1.5 GPM

FVI12 gpm 0.9 1.3 1.8 2.2 2.7 3.1 3.6 4.0 4.4 4.9 5.3

i12 gpm 0.7 1.0 1.4 1.7 2.1 2.4 2.8 3.1 3.4 3.8 4.1

20H gpm 1.1 1.7 2.3 2.8 3.4 4.0 4.5 5.1 5.7 6.2 6.8

20HI gpm 1.1 1.7 2.3 2.8 3.4 4.0 4.5 5.1 5.7 6.2 6.8

45H gpm 1.3 1.9 2.6 3.2 3.9 4.5 5.2 5.8 6.4 7.1 7.7

45HI gpm 1.3 1.9 2.6 3.2 3.9 4.5 5.2 5.8 6.4 7.1 7.7

EL22 gpm 1.3 1.9 2.6 3.2 3.9 4.5 5.2 5.8 6.4 7.1 7.7

EL22i gpm 1.3 1.9 2.6 3.2 3.9 4.5 5.2 5.8 6.4 7.1 7.7

Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury, or death.

Installation and service must be performed by a qualied installer, or service technician.

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Use & Care Manual

English

With Installation Instructions for the Installer

APPLICATION

Residential

INSTALLATION

Indoor

BTU’S

74,500

Tankless Water Heater

WARNING: This water heater may not be suitable

for use in manufactured (mobile) homes! Please check

local code restrictions pertaining to permanent/xed

installations in manufactured homes in your area.

The purpose of this manual is twofold: one, to provide the
installer with the basic directions and recommendations for the
proper installation and adjustment of the water heater; and two,

to the owner-operator, to explain the features, operation, safety

precautions, maintenance and troubleshooting of the water
heater. This manual also includes a parts list.

It is imperative that all persons who are expected to install,

operate or adjust this water heater read the instructions carefully
so they may understand how to perform these operations. If you
don’t understand these instructions or any terms within it, seek
professional advice.

FLOW RATE

4.0 GPM

Any questions regarding the operation, maintenance, service
or warranty of this water heater should be directed to the
seller from whom it was purchased. If additional information is
required, refer to the section on If You Need Service.

Do not destroy this manual. Please read carefully and keep in a safe place for future
reference.

Recognize this symbol as an indication of Important Safety Information!

California Proposition 65 Warning: This product contains chemicals known to the State of
California to cause cancer, birth defects or other reproductive harm.

WARNING: If the information in these instructions is not followed exactly, a re or
explosion may result causing property damage, personal injury or death.

FOR YOUR SAFETY!

Improper installation, adjustment, alteration, service
or maintenance can cause property damage,
personal injury, or death. Installation and service

must be performed by a qualied installer, service

agency or the gas supplier.

DO NOT store or use gasoline or other ammable

vapors or liquids or other combustible materials
in the vicinity of this or any other appliance. To

do so may result in an explosion or re.

PLEASE NOTE: i12 IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT

NOTICE. PLEASE VISIT WWW.ECCOTEMP.COM/SUPPORT FOR MORE INFORMATION.

WHAT TO DO IF YOU SMELL GAS

• DO NOT try to light any appliances.

• 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 re department.

• DO NOT return to your home until authorized

by the gas supplier or re department.

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Safety Information

Safety Precautions .................. 3-9

i12 Installation Instructions

Location ................................... 11-12

Typical Installation ............. 13-14

Water Connections ............. 15-16

Gas Supply ...................................... 16

Relief Valve ....................................17

Leak Testing ................................... 17

High Altitude ................................17

Venting .....................................18-23

Electrical Connection ................ 23

Pipe Insulation ............................ 24

Mounting ...................................... 25

Installation Checklist ................. 26

Operating Instructions

Start Instructions ................ 27-28

Water Temperature ................... 39

Maintenance

Housekeeping ............................ 30

Cleaning the Filter ..................... 31

Extended Shut-Down ...............31

Draining ................................. 31-32

Customer Service

Parts List.........................................33

Troubleshooting Tips

Before You Call ............................34

Error Code Guide .......................35

FOR YOUR RECORDS
Write the model and serial numbers here:

#_______________________________

#_______________________________

You can nd them on a label on the water heater

and/or packaging.

Staple sales slip or canceled check here.

Proof of the original purchase date is needed to
obtain service under the warranty.

READ THIS MANUAL

Inside you will nd many helpful hints on how to

use and maintain your water heater properly. A
little preventive care on your part can save you
time and money over the life of your water heater.

You’ll nd many answers to common problems in

the Troubleshooting Guide. If you review the chart

of Troubleshooting Tips rst, you may not need to

call for service.

READ THE SAFETY INFORMATION

Your safety and the safety of others are very
important. There are many important safety
messages in this manual and on your water

heater. Always read and obey all
safety messages. This is the safety
alert symbol. Recognize this symbol
as an indication of Important Safety
Information! This symbol alerts you
to potential hazards that can kill or hurt
you and others.

All safety messages will follow the safety alert
symbol and either the word “DANGER”,
“WARNING”, “CAUTION” or “NOTICE”.

English

These words mean:

DANGER - An imminently hazardous situation
that will result in death or serious injury.

WARNING - A potentially hazardous situation
that could result in death or serious injury
and/or damage to property.

CAUTION - A potentially hazardous situation
that may result in minor or moderate injury.

NOTICE: Attention is called to observe
a specied procedure or maintain a
specic condition.

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SAFETY PRECAUTIONS

English

Safety

READ ALL INSTRUCTIONS BEFORE USING

Be sure to read and understand the entire Use and Care Manual before attempting to install or
operate this water heater. It may save you time and money. Pay particular attention to the Safety
Instructions. Failure to follow these warnings could result in serious bodily injury or death. Should
you have problems understanding the instructions in this manual, or have any questions, STOP, and

get help from a qualied service technician, or the local gas utility.

DANGER!

INSTALL AND PROPERLY VENT THE WATER HEATER

Failure to properly install the water heater indoors as outlined in the Installation
Instructions in this manual can result in unsafe operation of the water heater. To

avoid the risk of re, explosion, or asphyxiation from carbon monoxide, never

operate this water heater unless it is installed properly and has an adequate

air supply for proper operation. Be sure to inspect the ue terminal for proper

installation at initial start-up; and at least annually thereafter. Refer to the Care

and Cleaning section of this manual for more information regarding ue terminal

inspection.

WARNING!

Gasoline, as well as other ammable materials and liquids (adhesives, solvents,
paint thinners etc.), and the vapors they produce are extremely dangerous. DO
NOT handle, use or store gasoline or other ammable or combustible materials

anywhere near or in the vicinity of a water heater or any other appliance. Be sure
to read and follow the labels on the water heater, as well as the warnings printed
in this manual. Failure to do so can result in property damage, bodily injury or
death.

Vapors from ammable
liquids will explode and catch re
causing death or severe burns.

Do not use or store ammable products

such as gasoline, solvents or adhesives
In the same room or area near the
water heater.

Keep ammable products :

1. Far away from heater

2. In approved containers

3. Tightly closed

4. Out of children ‘s reach

Installation:

Do not Install water heater where ammable products will be stored or used
unless the main burner ame Is at least 18” above the oor. This will reduce, but
not eliminate, the risk of vapors being ignited by the main burner ame.

Read and follow water heater warnings and Instructions. If owners manual is
missing, contact the retailer or manufacturer.

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Water heater has a main burner ame.
The main burner ame

1. Can come on at any time and

2. Will ignite ammable vapors.

Vapors:

1. Cannot be seen

2. Are heavier than air

3. Go a long way on the oor

4. Can be carried from other rooms to

the main burner ame by air currents.

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SAFETY PRECAUTIONS

IMPORTANT SAFETY INFORMATION READ ALL INSTRUCTIONS BEFORE USING

DANGER!

WATER TEMPERATURE SETTING

Safety and energy conservation are factors to be considered when selecting the
water temperature setting. Water temperatures above 125°F can cause severe
burns or death from scalding. The thermostat is adjusted to its lowest temperature
position when shipped from the factory. Be sure to read and follow the warnings
outlined on the label pictured below.

Time/Temperature Relationship in Scalds

Water Temperature

120°F

125°F

130°F

135°F

140°F

145°F

150°F

155°F

Table courtesy of Shriners Burn Institute

The chart shown above may be used as a guide in
determining the proper water temperature for your

home.

Time To Produce a Serious Burn

More than 5 minutes

1 1/2to 2 minutes

About 30 seconds

About 10 seconds

Less than 5 seconds

Less than 3 seconds

About 1 1/2 seconds

About 1 second

English

Safety

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 valves are
available, see manual.

Turn Water Heater

On/O

Increase

Temperature

Enable

Child-Lock

Decrease

Temperature

DANGER: Households with small children, disabled,

or elderly persons may require a 120°F. or lower
temperature setting to prevent contact with”HOT” water.

Maximum water temperature occurs while burner is on.
To nd water temperature being delivered, turn on a hot

water faucet and place a thermometer in the water stream
and read the thermometer.

The temperature of the water at the outlet of the water
heater can be regulated by setting the temperature on the
control panel. The control panel was set at 110°F before it
was shipped from the factory.

The illustration to the bottom left illustrates the control
panel and how to adjust the water temperature.

NOTICE: When this water heater is supplying general
purpose hot water requirements for use by individuals, a

thermostatically controlled mixing valve for reducing point

of use water temperature is recommended to reduce the
risk of scald injury. Contact a licensed plumber or the local
plumbing authority for further information.

NOTICE: The factory setting allows operating temperatures
between 80°F and 140°F.

NOTICE: This is an automatic temperature controlled
tankless water heater. This means that the temperature
must be set from the front LED control panel. You

can restrict the ow of the incoming water using the
built in ow restrictor in order to achieve a desired set
temperature. This tankless water heater is ow activated
and will adjust gas ames to heat water as necessary.

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English

Safety

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SAFETY PRECAUTIONS

DANGER!

NATURAL GAS AND LIQUEFIED PETROLEUM MODELS

Both LP and natural gas have an odorant added to aid in detecting a gas leak.
Some people may not physically be able to smell or recognize this odorant. If you
are unsure or unfamiliar with the smell of LP or natural gas, ask the gas supplier.

Other conditions, such as “odorant fade”, which causes the odorant to diminish in
intensity, can also hide or camouage a gas leak. Always check with commercial

leak detector or soapy water.

• Gas detectors are recommended in LP and natural gas applications and
their installation should be in accordance with the detector manufacturer’s
recommendations and/or local laws, rules, regulations or customs.

• Water heaters utilizing LP gas are dierent from natural gas models. A natural
gas water heater will not function safely on LP gas and vice versa.

• No attempt should ever be made to convert the water heater from natural gas

to LP gas. To avoid possible equipment damage, personal injury or re, do not

connect the water heater to a fuel type not in accordance with the unit data
plate; propane for propane units and natural gas for natural gas units. These

units are not certied for any other fuel type.

• LP water heaters should not be installed· below grade (for example, in a
basement) if such installation is prohibited by federal, state and/or local laws,
rules, regulations or customs.

• Propane or LP gas must be used with great caution. It is heavier than air and

will collect rst in lower areas making it hard to detect at nose level.

• Before attempting to operate the water heater, make sure to look and smell

for gas leaks. Use a soapy solution to check all gas ttings and connections.

Bubbling at a connection indicates a leak that must be corrected. When

smelling to detect a gas leak, be sure to sni near the oor also.

• It is recommended that more than one method, such as soapy solution, gas
detectors, etc., be used to detect leaks in gas applications.

Notice: If a gas leak is present or suspected:

• DO NOT attempt to nd the cause yourself.

• DO NOT try to light any appliances.

• DO NOT touch any electrical switch.

• DO NOT use any phone in your building.

• Leave the house immediately and make sure your family and pets leave

also. Leave the doors open for ventilation and contact the gas supplier, a
qualied service agency or the re department.

• Stay away from the house (or building) until the service call has been
made, the leak is corrected and a qualied agency has determined the
area to be safe.

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SAFETY PRECAUTIONS

IMPORTANT SAFETY INFORMATION READ ALL INSTRUCTIONS BEFORE USING

WARNING!

For your safety, the information in this manual must be followed to

minimize the risk of re or explosion, electric shock, or to prevent property

damage, personal injury, or loss of life.

FOR INSTALLATIONS IN THE STATE OF CALIFORNIA

California Law requires that residential water heaters must be braced, anchored or
strapped to resist falling or horizontal displacement due to earthquake motions.
For residential water heaters up to 52 gallon capacity, a brochure with generic

earthquake bracing instructions can be obtained from: Oce of the State Architect,

400 P Street, Sacramento, CA 95814 or you may call 916-445-8100 or ask a water
heater dealer.

However, applicable local codes shall govern installation. For residential water
heaters of a capacity greater than 52 gallons or tankless style, consult the local
building jurisdiction code for acceptable bracing procedures.

English

Safety

SAFETY PRECAUTIONS

Have the installer show you the location of the gas shut-o valve and how to shut
it o if necessary. Turn o the manual shut-o valve if the water heater has been
subjected to overheating, re, ood, physical damage or if the gas supply fails to
shut o.

• Read this manual entirely before installing or operating the water heater.

• Use this water heater only for its intended purpose as described in this Use
and Care Manual.

• Be sure your water heater is properly installed in accordance with local codes
and the provided installation instructions.

• Unless recommended by an Eccotemp technician, all part replacements and

servicing should be referred to a qualied technician.

SAVE THESE INSTRUCTIONS

READ AND FOLLOW THIS SAFETY INFORMATION CAREFULLY .

This water heater must be installed in accordance with these instructions, local codes, utility company
requirements, and/or in the absence of local codes, use the latest edition of the American National Standard/
National Fuel Gas Code. A copy can be purchased from either the American Gas Association, 400 North Capitol
Street Northwest, Washington, DC 20001 as ANSI standard Z223.1 or National Fire Protection Association, 1
Batterymarch Park, Quincy, MA 02269 as NFPA 54. In Canada, the latest edition of the CSA B149.1 Natural Gas
and Propane Installation, and the Canadian Electrical Code, CSA
C22.1Part1, in the absence of local codes.

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English

Installation

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Installing the i12 water heater

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Location

• Installation distances may vary by local code. It is the installer’s responsibility to verify installation
requirements.

• Make sure before installation that the gas type you will use is the same type on the data plate.

• The water heater unit should be installed by professionals. Improper installation may cause failure
or dangerous conditions such as gas leaking or explosion.

• Failure to have the water heater installed by a professional will void your warranty.

• The water heater cannot be installed in an un-vented bathroom, bedroom, basement, living room,

closet, outdoors, laundry room, stairway or an exit area. If installed in an exit area, it must be at

least 16.5 ft. or more away from the exit.

• Vent pipe should extend from the wall at least 2”. The terminal must be at least 1.64 ft. away from
obstruction and must be well vented.

• Vent pipe should slope 3° downward to avoid condensing water and protect from rain entering.

• Vent pipe should avoid direct, strong wind because the downdraft will cause malfunction.

• The water heater should be installed far from any blockage, and with plenty of enough space for
installation and maintenance. Adequate clearances for servicing must be provided.

English

Installation

• The water heater should not be installed in the same room with a gas stove.

• When determining the oor clearance, a clearance of 6 inches must be maintained between the

vent pipe and combustible material. A side wall clearance of 10 inches and a top clearance of 16
inches must be maintained.

• The vent pipe can be up to 32 ft. in length with one elbow.

• The vent pipe should be installed with a ame-retardant wall thimble. Owner must refer to vent

manufacturer’s instructions and specications. Z-Flex information can be found at www.novaex.
com, please refer to page 18 for additional links. Installation guidelines for venting provided by
NovaFlex, who is solely responsible for venting installation accuracy.

• The power socket connecting the water heater should be grounded properly with a GFCI circuit
protector.

• The water heater should not be located in an area where leakage of the heat exchanger or

connections will result in damage to the area adjacent to it or to lower oors of the structure.
When such areas cannot be avoided it is recommended that a suitable catch pan, adequately
drained, must be installed under the water heater. The pan must not restrict combustion airow.

• This unit MUST NOT be installed in a laundry room or in the same room as the washer/dryer.
Installation of the unit in a laundry room or in the vicinity of a washer/dryer will void the warranty.

• The water heater should be installed as close as practical to the vent termination to minimize vent
length and the number of elbows required for venting.

• A gas red water heater, or any other appliance should not be installed in a space where liquids
which give o ammable vapors are to be used or stored. Such liquids include gasoline, LP gas
(butane or propane), paint or adhesives and their thinners, solvents or removers.

• The water heater should be installed far from heat sources, ammable and dangerous materials.
Because of natural air movement in a room or other enclosed space, ammable vapors can be
carried some distance from where their liquids are being used or stored. The open ame of the
water heater’s main burner can ignite these vapors causing an explosion or re which may result in
severe burns, death or property damage.

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Location

English

Installation

CONTINUED...

• Raising the water heater will reduce, BUT NOT eliminate the possibility of lighting the vapor
of any ammable liquids which may be improperly stored or accidentally spilled.

• If the water heater is installed in a garage, it should be installed so that the direct ignition
system and main burner are no less than 18 inches above the garage oor.

• Hot and cold-water lines should be insulated to conserve water and energy.

• The water heater must be located so it is not subject to physical damage, for example, by
moving vehicles, area ooding, etc.

• The water heater should be installed with the proper venting materials and termination

suitable for Category III venting. Failure to install and properly vent the water heater to the

outdoors as outlines in the Venting Section of this manual can result in unsafe operation.

Owner must refer to vent manufacturer’s instructions and specications. Z-Flex information
can be found at www.novaex.com, please refer to page 18 for additional links.

• For other than a direct vent appliance, the appliance must be located as close as practicable to
a chimney or gas vent.

• DO NOT install water heater where subject to vibrations, or on the road use.

• DO NOT install the water heater in Recreational Vehicles, Mobile Homes, Boats and other
Watercraft.

• DO NOT install the water heater near vents for heating or cooling. A minimum of 4 feet
should be maintained.

• If the clearances stated on the Instruction/Warning Label, located on the front panel of the

heater dier, install the water heater according to the clearances stated on the label.

WARNING: Combustible construction refers to adjacent walls and ceilings and should
not be confused with combustible or ammable products and materials. Combustible and/
or ammable products and materials should never be stored in the vicinity of this or any

gas appliance.

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Typical Installation

Proper operation of the water heater requires air for combustion and ventilation. Provisions
for combustion and ventilation air must comply with referenced codes and standards.

Combustion and Ventilation Air

A conned space is one having a volume of less than 50 cubic feet per

1,000 BTUH of the aggregate input of all appliances within that space.

The air must be supplied through two permanent openings of equal area.

One is to be located within 12” above the oor and the other is to be
located within 12” below the ceiling.

The minimum net free area of each opening must not be less than one
square inch per 1,000 BTUH of the total input rating of all the appliances
in the enclosure (but not less than 100 square inches), if each opening

communicates with other unconned areas inside the building.

Buildings of unusually tight construction shall have the combustion and
ventilation air supplied from outdoors, or a freely ventilated attic or crawl
space. If air is supplied from outdoors, directly or through vertical ducts,

there must be two openings located as specied above and each must

have a minimum net free area of not less than one square inch per 4,000
BTUH of the total input rating of all the appliances in the enclosure.

If horizontal ducts are used to communicate with the outdoors, each opening must have a minimum net
free area of not less than one square inch per 2,000 BTUH of the total input rating of all the appliances in the

enclosure. If ducts are used, the minimum dimensions of rectangular air ducts shall not be less than 4”.

NOTICE: If the water heater is installed in an unconned space within a building of conventional
frame, masonry or metal construction, inltration air is normally adequate for proper combustion and
ventilation air must be made.

English

Installation

NOTICE: If the duct openings which supply combustion and ventilation air are to be covered with a
protective screen or grill, the net free area (openings in the material) of the covering material must be
used in determining the size of openings. Protective screening for the openings MUST NOT be smaller
than ¼” to prevent clogging by lint or other debris.

Corrosive Atmospheres

The air in beauty shops, dry cleaning
establishments, photo processing labs, and
storage areas for liquid and powdered bleaches
or swimming pool chemicals often contain such
halogenated hydrocarbons.

An air supply containing halogenated hydrocarbons
may be safe to breathe, but when it passes through

a gas ame corrosive elements are released that will

shorten the life of any gas burning appliance.

Propellants from common spray cans or gas leaks
from A/ C and refrigeration equipment are highly

corrosive after passing through a ame.

The water heater warranty is voided when failure
of the heater is due to operation in a corrosive
atmosphere.

NOTICE: The water heater should not be installed near
any air supply containing halogenated hydrocarbons.

Inspect Shipment

Not Included

Inspect the water heater for possible damage. Check the markings
on the rating plate of the water heater to be certain the type of gas
supplied corresponds to the water heater requirements. Verify all
included parts are present (see below).

These items are not included but
are recommended and available
for purchase

at www.eccotemp.com

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Typical Installation

English

Installation

Cold Water

NOTICE: The National Fuel Gas Code (NFGC) mandates a manual gas shut- o valve: See (NFGC)
for complete instructions. Local codes or plumbing authority requirements may vary from the
instructions or diagrams provided and take precedent over these instructions.

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Water Connections

Plumbing should be carried out by a qualied plumber in accordance with local codes. Use approved plumbing

materials and tools only.

Install a Check Valve between the water heater and the water shuto valve (See illustration below).

• To conserve energy and to prevent freezing, insulate both cold and hot water
supply lines. DO NOT cover the drain valves.

Flow Restrictor

Water Inlet

Filter

Check Valve

Nipple

CAUTION: This water heater must only be used with the following water supply system conditions:

• With clean, potable water free of corrosive chemicals, sand, dirt, or other contaminates.

• With inlet water temperatures above 32°F, but not to exceed 120°F.

• Free of lime and scale deposits.

• DO NOT reverse the hot and cold water connections. The water heater will not operate.

To ensure proper operation of the water heater, the following water pressure guidelines should
be followed:

• Operation of the i12 gas tankless water heater requires a minimum water ow rate of 0.6 GPM to activate and

0.8 GPM to maintain activation.

• Additional water pressure is required for long pipe runs and outlet tting(s) water pressure drops.

• To maintain proper performance, ensure sucient water supply pressure. The Required Water Flow Rate =
Min. Operating Water Pressure (0.8 GPM) + Pipe Pressure Loss + Faucet and Shower Pressure Loss + Safety
Margin (more than 5 psi).

• To supply hot water to upper oors, additional water pressure (0.44 psi/ft) must be ensured. The measurement
should be calculated by the distance between the water inlet of the water heater (ground level) to the hot

water faucet (upper oor level).

• Well water systems should be set at a range of 50-60 psi.

• When the water is supplied from a water supply tank, the height of the tank and the diameter of the pipes
and their relation to water pressure, should be taken into consideration. Gravity water pressure is not
recommended.

• Install a shuto valve near the inlet of the water heater for service and draining
purposes. Before connecting the water supply pipe to the water heater, open the

shut-o valve ·and clean out sand, debris, air, caulking material, etc. inside the
pipe. Connect to the water inlet, then check water pressure. Close the shuto
valve and clean the water lter.

• Be sure to put the ow restrictor lever in an upright position like the diagram to
the left. You’ll adjust this as needed seasonally to achieve desired temperatures.

If a water heater is installed in a closed water supply system, such as one having
a backow preventer in the cold-water supply line, means shall be provided
to control thermal expansion. Contact the water supplier or local plumbing

inspector on how to control this situation.

English

Installation

IMPORTANT: Do not apply heat to the HOT or COLD water connections. Any heat applied to the water

supply ttings will permanently damage the internal components of the water heater.

NOTICE: If the water pressure resistance of a shower head is too high, the burner in the water heater will fail to
ignite. Keep the shower head clean from debris that could cause additional pressure drop.

Notice: If using mixing valves on the outlet, choose one which prevents cold water pressure from overcoming hot

water line pressure.

DO NOT use pipes with smaller diameters than the water supply connection of the water heater.

Be sure to connect the water inlet and the hot water outlet as shown on the water heater. If reversed, the water
heater will not function.

Installation of unions or exible copper connections are recommended on the HOT and COLD water lines, so that

the water heater may disconnect easily for servicing if necessary.

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English

Installation

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Water Connections

In regards to the HOT WATER OUTLET:

• Connections between the water heater and point(s) of use
should be as short and direct as possible.

• DO NOT use lead or non-approved plastic pipe.

• To conserve energy and minimize heat loss, insulation of hot
water piping is recommended.

NOTICE: The pressure rate of hot water may vary when more than two
faucets (appliances, xtures, etc.) are being used simultaneously.

NOTICE: The pipes MUST be completely drainable. If the hot water

faucets are located at a point higher than the water heater, place a drain

valve at the lowest point (see diagram to the left).

Gas Supply

WARNING: Do not attempt to convert this water heater for use with a dierent type of gas other
than the type shown on the rating plate. Such conversion could result in hazardous operating
conditions. Please have a professional connect the gas pipe.

• The Manual Gas Appliance Shuto Valve must be installed at the gas
connection of the water heater at the time of installation (see diagram to the
left).

• The branch gas supply line to the water heater should be clean black steel
pipe or other approved gas piping material.

• A ground joint union or ANSI design certied semi-rigid or exible gas
appliance connector should be installed in the gas line close to the water
heater.

• The National Fuel Gas Code (NFGC) mandates a manual gas shut-o valve:
See (NFGC) for complete instructions.

• A sediment trap should be installed at the bottom of the gas line.

• The inlet gas pressure to the water heater must not exceed 10.5“ w.c.

for natural or 14” w.c. for LP gas. For purposes of input adjustment,

the minimum inlet gas pressure (with main burner on) is shown on
the water heater rating plate. If high or low gas pressures are present,
contact your gas supplier for correction

• The water heater and its indivdual shuto valve must be disconnected
from the gas supply piping system during any pressure testing of that

system at test pressures in excess of ½ psi (3.5 kPa).

• The water heater must be isolated from the gas supply piping system

by closing its individual manual shuto valve during any pressure

testing of the gas supply piping system at test pressures equal to or

less than ½ psi (3.5 kPa).

DO NOT use excessive force (over 31.5 ft lbs.) in tightening the pipe, particularly if pipe compound is used, as

the unit may be damaged.

Compound used on the threaded joints of the gas piping must be of the type resistant to the action of LP gas.
Use compound sparingly and use on male threads only.

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Relief Valve

A new pressure relief valve, complying with the Standard for relief Valves and Automatic Gas Shut-O Devices
for Hot Water Supply Systems, ANSI Z21.22, must be installed at the hot water outlet connection of the water
heater at the time of installation. Local codes shall govern the installation of relief valves. Pressure relief valves
are not included with your water heater but are available for purchase at www.eccotemp.com

For safe operation of the water heater, be sure that:

• The pressure rating of the relief valve must not exceed 150 psi, the maximum working pressure of the water
heater as marked on the rating plate.

• The BTUH rating of the relief valve must equal or exceed the BTUH input of the water heater as marked on its
rating plate.

• No valve of any type should be installed between the relief valve and the water heater.

• Discharge from the relief valve should be piped to a suitable drain to eliminate potential water damage. Piping
used should be of a type approved for the distribution of hot water.

• Hot and cold water lines should be insulated up to the water heater.

• The discharge line must be NO SMALLER than the outlet of the valve and must pitch downward to allow
complete drainage (by gravity) of the relief valve and discharge line.

• The end of the discharge line should not be threaded or concealed and should be protected from freezing. No
valve of any type, restriction or reducer coupling should be installed in discharge line.

NOTICE: The diagram below illustrates a pressure only relief valve. If local codes require a combination
temperature and pressure relief valve be installed, an extension piece may be needed.

NOTICE: Local codes govern the installation of relief valves. If local
codes require that a temperature and pressure relief valve should
be installed the manufacturer recommends a type 40XL Watts T&P
relief valve or an equivalent model be used.

English

Installation

NOTICE: Manual operation of relief valves should be performed

at least once a year. Turn o the electrical power and gas shuto

valve. Lift and release lever on the relief valve and check the
manual operation of the relief valve. You should take precaution to
avoid contact with the hot water coming out of the relief valve and
to prevent water damage.

NOTICE: If the relief valve on the system discharges periodically,

this may be due to thermal expansion in a closed water supply

system. Contact the water supplier or local plumbing inspector
on how to correct this situation. Do not plug the relief valve.

Leak Testing

WARNING:

Never use an open
ame to test for gas

leaks, as property
damage, personal
injury, or death
could result.

Pressure Testing the Gas Supply System

WARNING: Install a gas pressure regulator, in the gas supply line, which does not exceed the
maximum supply pressure. DO NOT use an industrial type gas regulator.

The water heater must be isolated from the gas piping system by closing the manual gas shut-o valve during

any pressure testing of the gas supply piping at pressures equal to or less than 1/2 psi (14’w.c.) .

The water heater and its gas connections must be leak tested at normal operating
pressures before it is placed in operation.

• Turn on the gas shut-o valve(s) to the water heater.

• Use a commercial leak detector or soapy water solution to test for

leaks at all connections and ttings. Bubbles indicate a gas leak that

must be corrected.
All connections should also be leak tested after the water heater is placed in operation.

High Altitude

The Eccotemp i12 Gas Tankless Water Heater has been tested for use at elevations up to 2000 feet. Installation

and use of the Eccotemp i12 above 2000 feet may eect overall product eciency and performance. Installation

and use of the Eccotemp i12 above 5000 feet is not recommended.

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Venting

English

Installation

DANGER: Failure

to install the vent

adapter and properly

vent the water heater

to the outdoors as
outlined in the
Venting section of
this manual will result
in unsafe operation
of the water heater
causing death, serious
injury, explosion, or

re. To avoid the risk
of re, explosion,or

asphyxiation from

carbon monoxide,

NEVER operate the
water heater unless it

is properly vented
and has adequate

air supply for proper
operation as outlined
in the Venting section
of this manual.

WARNING: Use

UL approved Category
III Stainless Steel vent

material only. No

other vent material

is permitted. Owner

must refer to vent
manufacturer’s

instructions and

specications. Z-Flex

information can

be found at www.
novaex.com, see

page 18 for additional
links.

The installation of venting must
comply with national codes, local
codes, and the vent manufacturer’s
instructions. Owner must refer to
vent manufacturer’s instructions and

specications. Z-Flex information
can be found at www.novaex.com,

please refer to page 18 for additional
links.

The water heater must be vented to
the outdoors as described in these
instructions. DO NOT connect this

water heater to an existing Vent or

Chimney: it must be vented separately
from all other appliances.

All vent components (adapters, pipe,
elbows, terminals, etc.) should be UL

1738 Certied Stainless Steel Venting

Material (e.g. AL29-4C).

The specied vent termination must

be used. The termination must be
used. The termination should be a
90° elbow type with screen. (Refer to
page 18).

Use a vent pipe with an
antidisconnection structure.
The use of a High Temperature
Silicone (500° F) may be required to
seal vent connections. To prevent

accidental gas exhaust leakage,
apply a ¼” wide bead approximately
¼” from the end and another bead

against the joint side of the stop
bead.

Follow vent manufacturer’s
installation instructions.
The unit can be vented either
horizontally or vertically.

Vent pipe runs must be adequately
supported along both horizontal and
vertical runs.

The maximum recommended

unsupported span should be no more

than ve (5) feet. Support isolation

hanging bands should be used. DO
NOT use wire. (See diagram below).

2 Degree Downward Slope.

WARNING: Refer
to pages 16-17 for
clearances to

combustible material.

If the vent piping passes through a closed space, wrap the vent pipe with inammable insulation material
that is at least 3/4” thick. DO NOT let the insulation material make contact with ammable materials. A
minimum clearance of 6” between the vent pipe and ceiling should be maintained. Follow local codes.

For maintenance and inspection purposes, the following holes are
required to be made:

• Two (2) inspection openings that allow access to venting. One
( 1) of these openings should be close to where the vent pipe
enters the ceiling. The other opening should be near the vent
termination.

• A ventilation hole with a 16 sq. in. opening should be made at
least every 10 feet.

NOTICE : Vent pipes must be completely insulated with

inammable material when installed in alcoves, closets, and garages and must not touch any ammable

material.

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Venting

Maximum Vent Length

Owner must refer to vent manufacturer’s instructions and specications. Z-Flex information can be
found at www.novaex.com, please refer to page 18 for additional links.

The system will not operate if there is excessive restriction (pressure

Number of

90° elbows

(bends)

1

2

3

One (1) 90° Elbow is

Equivalent to 5 Feet of

Straight Pipe

Maximum

Length of

Straight Pipe

32’

27’

22’

drop) in the venting system. A maximum of 32 feet of vent pipe

may be used provided there is only one 90° elbow in the system. If
additional elbows are required: two elbows can be used with 27 feet,
and three elbows can be used with 22 feet of vent pipe.

A 90° elbow is equivalent to 5 feet of straight pipe. A 45° elbow is
equivalent to 2 feet 6 inches of straight pipe.

The termination elbow does not count as an elbow when
determining total vent lengths.

The vent must be installed with a slight downward slope of ¼” per

foot of horizontal run toward the vent terminal (see diagram below).
This ensures that any condensate formed during operation of the
unit evacuated from the water heater.

A ¼” per foot upward slope is acceptable when it is not possible to

vent with a downward slope, however, a UL approved Category III
Stainless Steel condensate trap MUST be installed at the beginning
of the horizontal run (See page 20 “Typical Horizontal Termination

w ¼” per foot UPWARD Slope” or page 14, “Standard Vertical Vent
Termination” for examples).

English

Installation

Minimum Vent Length

The venting may be as short as 12”,

provided one vent termination is
installed to the outdoors through a
sidewall, one 90° elbow is included in
the installation, and the wall thimble is
installed.

NOTICE: Make sure that the seam
of the vent pipe in horizontal runs
is toward the top of the installation
(see illustration to the left)

Draining the Condensate

In certain conditions, installations in unconditioned space or having long horizontal or vertical
runs may accumulate condensate.

Condensate is known to be acidic; refer to local, state (provincial) or federal codes for proper
handling methods.

In order to prevent condensate from draining back into the water heater, we recommend a
condensate trap and drain to be installed in a horizontal vent section as close as practical to
the water heater vent connection.

Not following proper condensate procedures will void warranty.

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Venting

English

Installation

Termination Clearances

Clearance Requirements from Vent Terminations to Building Openings

*All clearance requirements are in accordance with ANSI Z21.10.3a-2017 and the National Fuel Gas Code, ANSI Z223.1

Maintain the following clearances to any

opening in any building:

• 4’ below, 4’ horizontally from, or 1’ above
any door, operable window, or gravity air
inlet into any building.

• 3’ above any forced air inlet within 10’.

Vent Clearances When

Heater is Installed Indoors

A) A minimum clearance value determined by testing in accordance with Clause 5.20, or;

B) A reference to the following footnote:

“Clearance in accordance with local installation codes and the requirements of the gas supplier.”

• A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family
dwellings and serves both dwellings.

• Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the oor.

Illustration

Notes:

1) In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code

2) In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Cod

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Venting

Ventilation Parts

Owner must refer to vent manufacturer’s instructions and specications by visiting www.novaex.
com. Installation guidelines for venting is provided by NovaFlex, who is solely responsible for venting

installation accuracy.

Z-Flex parts are available for purchase by visiting www.eccotemp.com.

Z-Flex Installation Instructions:
www.novaex.com/information_centre/zex/032-Vent%20Residential/Z-Vent%20Installation%2Guide%

20CURRENT.pdf

Z-Flex Ventilation Parts:

https://www.eccotemp.com/installation

Part Name Description SKU# Description

i12 90 Degree Elbow Stainless Steel 90° Elbow 1200031 90 Degree Elbow

Eccotemp 2.5" to 3" Vent
Adapter

Eccotemp 3" Horizontal
Vent Kit

Eccotemp 3" Vertical
Vent Kit

i12 Termination Pipe Stainless Steel Termination Pipe 1001029 i12 Termination Pipe

i12 Wall Thimble

Replacement

i12 18" Vent Extension Stainless Steel Vent Extension: 18" 12000300 i12 18" Vent Extension

Stainless Steel Adapter 2SVPA03 2.5" to 3" Adapter Paloma

Stainless Steel Horizontal Vent Kit 2ZVEWD03 3" Vent Kit Horizontal

Stainless Steel Vertical Vent Kit 2SVSRPKE03 3" Vent Kit Vertical

Stainless Steel Wall Thimble 1200034 i12 Wall Thimble

English

Installation

Part# 2SVSTB03

Outside wall

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Venting

English

Installation

Installation

Only the 2.5” vent kit provided with the i12 or approved Z-Flex
Stainless Steel venting should be used for installation.

The wall thimble requires mechanical support from the wall suf­fucuent to support any incidental loads on the system. If the wall is
not sucient enough to support the wall thimble, then appropri­ate additional framing and/or blocking is required.

Installation Procedure:

Prepare an opening for the wall thimble in the wall. The opening

must be 6-1/2 inches in diameter for a 3” vent system. The opening

should be round.

The opening must be able to accommodate the 2” vent system and

wall thimble provided. Consult manual or building codes for distance

from amable materials.

The wall thimble is designed to adapt to any wall thickness from

3-1/2” to 6” thick. If the wall is thicker than 6” the wall thimble may
be extended using a piece of 6” diameter snaplock or welded seam
galvanized pipe up to 6” long.

Select the larger diameter half of the wall thimble for the outside of
the wall.

Outside wall

• Apply a continuous bead of high quality silicone or silicone/la-

tex caulk on the inside of the outer ange. This will be the only

weather seal to keep moisture outside the building. Ensure a

sucient seal is made.

• Position this portion of the wall thimble into the prepared hole
from the outside. Secure the assembly into the prepared open­ing using fasteners as indicated by sheathing or structural mem­bers, sealing the screw heads with more caulking.

Use 4 hollow wall anchors, at least 1/8” in diameter and of appropri­ate length for the thickness of the sheathing, if sheathing is particle

board or other composite material. Use 4 #10x1-1/4” wood screws

for plywood, solid wood sheathing or members. Use suitable mason­ry anchors when passing through solid masonry walls. Reinstall the
decorative sheathing around the wall thimble. This assembly may be

painted to match the exterior decor.

• Slide the interior portion of the thimble into the inside hole. Be

certain the interior and exterior thimble halves overlap at least
1”. If insucient overlap exists, extend the interior portion with

single wall galvanized pipe.

• Secure the vent section that protrudes through the wall thimble
to the 90 degree elvbow attached to the water heater.

• The exhaust pipe should be sloped downward at an approximate
3 degree grade in order to avoid rain (or condensation entering

the heater) through the exhaust pipe.

WARNING: Use UL approved
Category III vent material
only. No other vent material is

permitted. Owner must refer to

vent manufacturer’s instructions
and specications. Z-Flex
information can be found at
www.novaex.com, refer to page

18 for additional links.

CAUTION: Follow the vent

manufacturers installation

instructions as design might vary

om manufacturer to
manufacturer.

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Venting

Continued...

WARNING: Field wiring connections and electrical grounding must comply with local codes,

or in the absence of local codes, with the latest edition of the National Electrical Code,ANSI/

NFPA 70, or in Canada, Canadian Electrical Code, CSA C22.1Part1.

Electrical Connection

POWER CORD:

English

Installation

• The electric power supply requirement for this water heater is 120 VAC/60HZ, 2 Amps.

• The water heater comes with a three (3) pin power supply cord. Use only a power outlet with a ground
terminal.

• The installation of an electric leakage breaker is recommended. (GFCI)

• Keep any excess of the power supply cord on the outside of the water heater.

WARNING: Shock hazard line voltage is present. Before servicing the water heater, turn o the
electrical power to the water heater at the main disconnect or circuit breaker. Failure to do so could
result in severe personal injury or death.

Electrical Wiring Diagram

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause
improper and dangerous operation. Verify correct operation after servicing.

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Pipe Insulation

English

Installation

Insulation blankets, available to the

general public, for external use on

gas water heaters are not
necessary. The purpose of an

WARNING: If

local codes require

external application of

insulation blanket kits
the manufacturer’s

instructions included

with the kit must be

carefully followed.

insulation blanket is to reduce the
standby heat loss encountered with
storage tank heaters. This water
heater does not store water 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

Inlet Pipe and Outlet Pipe Installation

Use pressure resistant pipe to connect the inlet and outlet
water pipes of the water heater and the local water pipe
(Make sure to place the rubber ring).Before connecting the

inlet water pipe, ush the inside of the pipe.

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.

Hot and Cold Pipe
Insulation Installation

For increased energy eciency,

use pipe insulation. Please install
the insulation, according to the
instructions above, making sure to
insulate all the way to the top. Do not
cover any drain or pressure valve(s).

NOTICE: The hot and cold pipes

should be insulated as shown help to
provide additional freeze protection

During Installation of this water heater

Do’s

• DO check inlet gas pressure to ensure that it is within the range specied on the rating plate.

• DO provide adequate air for combustion and ventilation as discussed in the Use & Care Manual and the

National Gas Code (CAN/CGA B 149 in Canada).

• DO maintain proper clearances to combustibles as specied by applicable code.

• DO ensure that the ue terminal location complies with the guidelines found in the Use & Care Manual and

National Fuel Gas Code (CAN/CGA B 149 in Canada).

Dont’s

• DON’ T block or restrict the air intake opening located on the back side of the water heater.

• DON’ T remove the front cover unless absolutely necessary. This should only be done after being examined by

a qualied service technician.

• DON’ T install this product where standing water may occur.

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Mounting

Make sure the location of the water heater allows for easy access
and operation.

In case of dry wall or concrete wall use dry wall anchors or lag bolts.

The water heater requires 120VAC/ 60Hz. Have a receptacle with
ground terminal near the water heater. The length of the power
supply cord is 5 feet.

Drill the holes as per the sizes in the gure to the left, put 2
expansion screws into the top holes, and 2 rubber screws into the

bottom holes.

Hang up the water heater unit, tighten the expansion screws, and put

2 wood thread screws into the bottom holes.

CAUTION: Reinforcement of the wall is required in case the wall is

not strong enough to hold the water heater.

Indoor units must be installed with CAT III

Sealant

3.9”

vent pipe in acc ordance with vent

supplier/ Manufacturer in accordance with

local code. Owner must refer to vent

4.8”

manufacturer’s instructions and
specications. Z-Flex information can be
found at www.novaex.com, please refer

to page 18 for additional links.

English

Installation

3.9”

2.9”

Back Installation

Side Installation

5.5”

5.5”

A. BACK INSTALLATION

1. Insert the vent pipe through the
installation holes in the wall with the terminal
sticking out.

2. Connect the elbow to the vent pipe and
water heater, moving straight backwards

until the expansion screws go into the holes

of the water heater. Screw the nuts tight
(pay attention to the direction of the elbow).

B. SIDE INSTALLATION:

1. Aim the holes in the water heater onto

3.9”

the expansion screws, hang it up and screw

the nuts tightly.

4.8”

2. Put the vent pipe through the holes in the
wall, and connect the elbow with the water
heater and vent pipe.

C. VERTICAL INSTALLATION

Please refer to local installation professional
or venting manufacturer:

The installation hole in the wall needs to

be sealed by re-retardant material or wall

thimble, making sure the water heater is tight

and will not come o.

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English

Installation

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Installation Checklist

A. Water Heater Location

Installed indoors.
Close to area of mostly used outlet.
Protected from freezing temperatures.
Proper clearance from combustible surfaces observed.

Sucient fresh air supply for proper operation of water heater.
Air supply free of corrosive elements and ammable vapors.

Provisions made to protect area from water damage.

Sucient room to service heater.

Combustible materials, such as clothing, cleaning materials, rags,
etc. clear of the heater and vent piping.
Water heater is properly attached to the wall.

B. Water Supply

Water supply has sucient pressure.

Air purged from water heater and piping.
Water connections tight and free of leaks

Water lter is clean and in place.

Materials used are as instructed in this manual.
Water pipes are insulated.

C. Gas Supply

Gas type matches rating plate.

Gas supply pressure is sucient for the water heater.
Gas line equipped with shut-o valve, union and sediment trap.

Approved pipe joint compound used.
Commercial leak detector or soap and water solution used to check all

connections and ttings for possible gas leak.

Gas Company inspected installation (if required).

D. Relief Valve

Pressure Relief Valve properly installed and discharge line run
to open drain
Discharge line protected from freezing.

E . Electrical Wiring

Voltage matches rating plate.
Water heater is properly grounded .
Wiring meets all local codes.
GFCI Protection where required.

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Start Instructions

Before operating this water heater, be sure to read and follow the instructions on the label pictured below
and all other labels on the water heater, as well as the warnings printed in this manual. Failure to do so
can result in unsafe operation of the water heater resulting in property damage, personal injury, or death.
Should you have any problems reading or following the instructions in this manual. STOP, and get help from

a qualied person.

FOR YOUR SAFETY BEFORE USING THE WATER HEATER

WARNING: If you do not follow these instructions exactly, a re or

explosion may result causing property damage, personal injury or loss of life.

A. This water heater does not have a pilot. It is equipped with an ignition device which automatically

lights the burner. Do not try to light the burner by hand.

B. BEFORE OPERATING smell all around the water heater area for gas. Be sure to smell next to the

oor because some gas is heavier than air and will settle on the oor. Test all connections with

a commercial leak detector or soapy water.

WHAT TO DO IF YOU SMELL GAS

• DO NOT try to light any appliance • DO NOT touch any electric 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 or re department. • DO

NOT return to your home until authorized by the gas supplier or re department.

C. Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not

push in or turn by hand, don’t try to repair it, call a qualied service technician. Force or

attempted repair may result in a re or explosion.

D. DO NOT use this water heater if any part has been under water. Immediately call a qualied

service technician to inspect the water heater and to replace any part of the control system and any

gas control which has been under water.

OPERATING INSTRUCTIONS

English

Operating

1. STOP! Read the safety information above on this label.

2. Turn o all electric power to the water heater.

3. Set the thermostat to lowest setting.

4. DO NOT attempt to light the burner by hand.

5. Turn the Gas Shut-o Valve located on the outside of the

unit clockwise to the “OFF” position.

6. Wait ve (5) minutes to clear out any gas. If you smell gas, STOP! Follow “B” in the safety

information above on this label. If you don’t smell gas, go to the next step.

7. Turn the Gas Shuto Valve located on outside of the unit counterclockwise to the “ON” position.

8. Turn on all electric power to the water heater.

9. Set thermostat to desired setting.

10. If the water heater will not operate, follow the instructions “To Turn O Gas To water

heater” and call your service technician or gas supplier.

TO TURN OFF GAS TO WATER HEATER

1. Turn o all electric power to the water heater if service is to be performed.

2. Turn the Gas Shut-o Valve located on the outside of the unit clockwise to the “OFF” position.

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Start Instructions

English

Operating

Continued...

Turning on the Water Heater

1. Make sure the gas type you will use is same as the type on the data plate.

2. Turn on the main gas valve, plug in the power cord (be sure the socket is well grounded), and

press the “ON/OFF”button on the control panel. Set temperature to 120° F.

3. Turn on the faucet, and the fan will begin working. You will hear the ignition sound after a few
seconds. The burner will ignite, and hot water will come out. If the burner is not ignited
successfully, the ignition sound will last a few seconds. If the burner still fails to ignite, turn

o the faucet and wait for 10-20 seconds, and repeat the above procedures.

For rst use and/or if the water heater has not been used for a considerable period of time, the

repeat of the above procedures may be required, due to accumulated air inside the gas pipe.

Safety Precautions

If there is any diculty in understanding or following the Operating Instructions or the Care and
Cleaning section, it is recommended that a qualied person or serviceman perform the work.

• DO turn o manual gas shut-o valve if
water heater has been subjected to over

heating, re, ood, physical damage or if
the gas supply fails to shut o.

• DO NOT turn on water heater unless water
and gas supplies are fully opened.

• DO NOT turn on water heater if cold water

supply shut-o valve is closed.

• DO NOT install in a laundry room.

• DO NOT allow combustible materials such
as newspaper, rags or mops to accumulate
near water heater.

• DO NOT store or use gasoline or other

ammable vapors and liquids, such as

adhesives or paint thinner, in vicinity
of this or any other appliance. If such

ammables must be used, open doors

and windows for ventilation, and all gas
burning appliances in the vicinity should

be shut o including their pilot lights, to

avoid vapors lighting.

NOTICE: Flammable vapors can be drawn
by air currents from surrounding areas to

the water heater

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Water Temperature

DANGER: There is a hot water
scald potential if the temperature
is set too high. Households with

small children, disabled, or elderly
persons may require a 120°F or

lower temperature setting to

prevent contact with HOT water.

Water Temperature

120°F

125°F

130°F

135°F

140°F

145°F

150°F

155°F

Table courtesy of Shriners Burn Institute

Time To Produce a Serious Burn

More than 5 minutes

1 1/2to 2 minutes

About 30 seconds

About 10 seconds

Less than 5 seconds

Less than 3 seconds

About 1 1/2 seconds

About 1 second

Output temperature of water is regulated by setting the
temperature on the front of the unit.
Safety factors should be considered when selecting the
water temperature.

Water temperature above 120°F can cause severe burns
or death from scalding. The thermostat is adjusted to
its lowest temperature position when shipped from the
factory.

Be sure to read and follow the warnings outlined in this
manual and on the label located on the water heater.

Mixing valves are available for reducing point of use
water temperature by mixing hot and cold water in

branch water lines.

Procedures for adjusting the thermostat for energy

ecient operation at the minimum water temperature

setting consistent with the consumer’s needs.

Contact a licensed plumber or the local plumbing
authority for further information.

English

Operating

Setting the Temperature:

The Eccotemp i12-LP/NG models are AUTOMATIC
TEMPERATURE CONTROLLED tankless water

heaters. You will need to set your maximum

temperature on the i12 Gas Tankless Water
Heater and then adjust your sink or shower water
temperature at the source.

The i12 is a ow activated unit and should maintain

at least 0.6 GPM to activate and 0.6 GPM to
maintain ativation.

Turn Water Heater

On/O

Enable

Child-Lock

Increase

Temperature

Decrease

Temperature

Automatic vs. Manual Temperature Control

The i12 is an automatic temperature controlled tankless water heater. Below explains the dierences between an automatic

and manual temperature controlled tankless water heater. For additional questions please visit support.eccotemp.com.

• Automatic Temperature Control: The unit will self-adjust
temperature according to what is being requested of
at the output water source (sink or shower). It also will
regulate the temperature automatically according to
how many applications are being used at the same time.

• Manual Temperature Control: You must adjust the
temperature manually each time you use the unit. The
temperature must be adjusted according to the amount
of applications being used at the same time due to the

uctuation of pressure.

NOTICE: If inlet water temperature is high, and set

temperature is low, the actual temperature might be higher
than the set temperature, and viceversa..

WARNING: Should overheating occur or the gas supply fail to shut o, turn o the manual

gas control valve to the water heater.

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Housekeeping

English

Maintenance

DANGER: Before

manually operating

the relief valve, make

certain no one will

be exposed to the

danger of the hot

water released by the
valve. The water may
be hot enough to

create a scald hazard.

The water should be

released into a

suitable drain to
prevent injury or

property damage.

DANGER: Hotter
water increases the
potential for Hot
Water Scalds.

DANGER: Failure
to perform the
recommended

Routine Preventative

Maintenance can
harm the proper
operation of this
water heater, which

can cause carbon

monoxide dangers,

excessive hot water

temperatures and
other potentially
hazardous conditions.

Properly maintained, your water heater
will provide years of dependable
trouble-free service. It is recommended
that a periodic inspection of the burner,

relief valve, water lter and venting

system should be made by service

personnel qualied in gas appliance

repair.

It is suggested that a routine preventive
maintenance program be established
and followed by the user.

At least once a year, lift and release the
lever handle on the pressure relief valve,
located in the hot outlet piping of the
water heater, to make certain the valve
operates freely. Allow several gallons to

ush through the discharge line to an

open drain.

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.

Inspect the area around the water
heater to ensure a safe operating
environment. Keep water heater
area clear and free from combustible
materials, gasoline, and other

ammable vapors and liquids. Ensure

the unit has not been damaged. If
damage or denting is present, contact
a service personnel to verify proper
operation.

Check for any abnormal sounds during
normal operation of the water heater.

All piping should be checked for gas
and/or water leaks. Refer to page 14
of this manual for instructions on leak
testing.

The air intake and cold water supply

lters should be cleaned monthly. Refer
to the “Housekeeping” section for

further information.

DO NOT operate the water heater if
you feel something is wrong with the
unit.

DO NOT allow children to operate or
otherwise handle the unit.

NOTICE: If the pressure relief valve on the hot water heater discharges periodically, this may be
due to a problem in the water system. Contact the water supplier or your plumbing contractor
on how to correct this. DO NOT plug the relief valve outlet.

NOTICE: After inspection, maintenance, and/ or cleaning, ensure proper operation by turning on

a hot water faucet.

Before performing any Housekeeping tasks to this water heater, be sure to turn the unit o and disconnect

the power supply.

Vacuum around the water heater for dust, dirt and lint on a regular basis. Clean the water heater and
remote control by using a damp soft cloth with a few drops of mild detergent and gently wiping the
surfaces of the unit. Wipe any remaining moisture with a dry soft cloth.

To ensure sucient ventilation and combustion air supply, proper clearances must be maintained. The
water lters should be cleaned on a monthly basis. Combustion system is fan-assisted

CLEANING THE WATER HEATER:

• Make sure the unit is OFF and the electrical power supply has been disconnected.

• DO NOT scrub the appliance with a brush.

• Use only mild soapy water, other cleaners may damage the surface of the water heater.

• DO NOT remove any label including the rating plate while cleaning or servicing.

DANGER: Shock Hazard. Make sure the electrical power to the water heater is o to avoid potential

serious injury or damage to components.

DANGER: Combustible materials, such as clothing, cleaning materials, or ammable liquids, etc.,
must not be placed against or next to the water heater.

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Cleaning the Water Filter

HOW TO CLEAN THE WATER FILTER:

1. Make sure the unit is OFF and the electrical power supply

2. has been disconnected.

3. Turn the water supply OFF to the heater.

4. Disconnect the water source from the water inlet.

5. Use a screw driver and gently remove the lter from inside the water inlet.

6. To remove severe dust, use a soft brush and wash with running water.

7. Return the lter to the water heater inlet pipe and reconnect your water
supply.

8. Turn the electrical power supply and cold water supply ON to the water
heater.

Extended Shut-Down

If the water heater is to remain idle for an extended period of time, the power and water to the appliance
should be turned o.

The water heater and piping should be drained if they might be subjected to freezing temperatures.

After a long shut-down period, the water heater’s operation and controls should be checked by qualied

service personnel.

English

Maintenance

Draining your Water Heater

When the temperature falls below 32°F, water in your plumbing system or water heater can turn to ice and

then expand causing damage to the water heater. This damage is not covered under your manufacturer’s

warranty. If these conditions are anticipated, please drain the water heater as follows to help but not
guarantee from freezing. Below are instructions for draining water out of the water heater.

1. Close the gas shut-o valve(s).

2. Close the water shut-o valve.

3. Turn the on/o switch to the OFF position and disconnect breaker at least 10 seconds after step #1.

4. Open drain valve.

5. Open all hot water faucets. Before proceeding to the next step, make sure that COLD water is coming out of

all hot water faucets.

6. To put the water heater back into operation after draining, follow the steps below.

7. Reinstall the water lter. Close the hot water outlet drain valve.

8. Open the water shut-o valve and close again after making sure that water comes out from hot water faucets.

(This step is to remove air from the water lines).

9. Reconnect the breaker and turn the on/o switch to the ON position, fully open the gas shut-o valve and the

water shut-o valve.

NOTICE: The water heater may not operate unless the above procedure is followed correctly.

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Draining your Water Heater

English

Maintenance

CONTINUED...

WARNING:
Failure to follow these
instructions while
draining the water
heater can cause
serious damage to
the water heater as
well as personal injury
including scalding.

6 Month Cleaning Routine

To prevent water scale, lime or rust deposit buildup and ensure your Eccotemp tankless

water heater is running as eciently as possible it is highly recommended that you

clean your Eccotemp tankless water heater every 6 months. To do this we recommend

that you use our Eccotemp EZ-Flush System Descaler Kit. For more information and to

purchase please visit us at www.eccotemp.com or call 1-866-356-1992.

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Parts List

To purchase replacement parts for your i12 Gas Tankless Water Heater please contact Technical
Support [e-mail] or 1-866-356-1992.

Contact Eccotemp to place orders for any parts.

All parts orders should include:

• The model and serial number of the water heater from the

WARNING: For your safety,

DO NOT attempt to disassemble

this unit for any reason

rating plate.

• Specify type of gas (natural or LP) as marked on the rating
plate.

• Part description (as noted below) and number of parts desired.

English

Maintenance

CAUTION: For your safety, DO NOT attempt repair of electrical wiring, gas piping, burners,
or other safety devices. Refer repairs to qualied service personnel.

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Before you call

English

Troubleshooting

Problem

Not enough or

no hot water

Save time and money! Review the charts on the following pages rst and you may not

need to call for service. This water heater incorporates a variety of shut o devices that

prevents the operation of the water heater down if undesirable combustion conditions

occur. Such as the presence of a blockage of the combustion air vent insucient gas

or pressure which can impact the safe operation of the water heater. Please contact a

Qualied Service Technician if this occurs.

Possible Cause

Water shuto valve is not
fully opened.

The ow restrictor may be
open too much.

Hot water faucet is not
fully opened

Water piping is frozen Allow piping to thaw.

No electricity or water
supply is cut o.

Unit is not “ON”.

Check shuto valve and open fully.

Adjust the ow restrictor in the (-) direction to
reduce the amount of water ow.

Open hot water faucet completely.
(The main burner goes o when incoming water
volume is inadequate.

Check that proper power is being supplied
and/or water supply is adequate.

Turn the unit “ON” by the button on the remote
control.

What To Do

Water not

hot enough.

Water too hot

The temperature may
be set too low

Mixing Valve malfunction
(if applicable).

Error code displayed on
remote control panel

The temperature may be
set too low.

The ow restrictor may be
open too much.

The gas valve is not fully
opened.

The temperature is set
too high

The ow restrictor may be
closed too much.

Water shuto valve is
not fully opened.

Small amount of water
has been heated.

Increase the temperature setting.

Check and replace if necessary.

See instructions for Error Code and if required,
contact a dealer for service.

Increase the temperature setting.

Adjust the ow restrictor in the (-) direction to
reduce the amount of water ow.

Check and open the gas valve fully.

Decrease the temperature setting.

Adjust the ow restrictor in the (+) direction to
increase the amount of water ow.

Check shuto valve and open fully.

Allow more water to ow by adjusting the ow
restrictor in the (+) direction.

Water lter is clogged Clean the lter with a tooth brush.

Fan continues

to rotate after

hot water faucet

This function is to
purge unburned gas
10-15 seconds.

Normal operation. There is no need to call for
service. Check for error code.

is closed.

PLEASE NOTE: i12 IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT

34

Phone: [phone] | Email: [e-mail] | Address: 315 - A Industrial RD Summerville, SC 29483

NOTICE. PLEASE VISIT WWW.ECCOTEMP.COM/SUPPORT FOR MORE INFORMATION.

Support: Eccotemp.com/help-desk Shop Online: Eccotemp.com/products Store Locator: Eccotemp.com/locator

Error Code Guide

When an error code is displayed:

• Close the hot water faucet.

• Wait for 5 minutes before turning the unit
on again.

• Open the hot water faucet.

NOTICE: If an error code other than those listed

below is displayed, immediately turn o the hot

water faucet, take note of the error code, turn

o the switch on the remote control and call the
customer assistance number.

Error

Code

E0

E1

Error Description Possible Cause What To Do

Hot water sensor
failure

Ignition system failure

Junction port loose,
Short circuit

The gas valve is not opened
or fully opened, Water
shut-o valve is not open,
Junction port loose

If the error code remains shown:

• Close the hot water faucet.

• Take the proper action shown below and
attempt operation of the water heater
again.

If the error code is still shown:

• Turn o the hot water faucet.

• Take note of the error code displayed and
call the customer service assistance number

in the “If You Need Service” section.

Call for Service

Check and open gas fully,
Check and open water valve,
Call for Service

English

Troubleshooting

There is ame when
no

E2

water coming in

Over-heating

E3

protection

Cold water

E4

temperature sensor

Pressure Switch

E5

Over-heating

E6

solenoid valve

E7

vent pipe block vent pipe is blocked clean the pipe

E8

Electric circuit problem Call for Service

Dry Combustion, Problem of
over heating controller

problem with sensor,
problem with sensor’s plug
or socket, none of the above

Motor problem, Voltage of
power supply is too low

Gas pressure is too high,
Water shuto valve is not
fully opened, The
temperature is set too low

open circuit of the valve,
short circuit of the valve,
none of the above

Call for Service

replace the sensor, x it,
replace the computer board

Call for Service

Check shut-o valve and
open fully, Increase
temperature setting

connect the valve, replace the
valve, replace the computer
board

CAUTION: For your safety DO NOT attempt repair of gas piping, remote control,

burners, vent connectors or other safety devices. Refer repairs to qualied service

personnel.

CAUTION: Make certain power to water heater is “OFF” before removing protective
cover FOR ANY REASON.

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring

errors can cause improper and dangerous operation. VERIFY PROPER OPERATION
AFTER SERVICING.

PLEASE NOTE: i12 IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT

NOTICE. PLEASE VISIT WWW.ECCOTEMP.COM/SUPPORT FOR MORE INFORMATION.

Phone: [phone] | Email: [e-mail] | Address: 315 - A Industrial RD Summerville, SC 29483

35

English

Support: Eccotemp.com/help-desk Shop Online: Eccotemp.com/products Store Locator: Eccotemp.com/locator

Eccotemp Systems ,LLC
Limited Warranty Information

Model(s) i12-LP and i12-NG

Eccotemp hereby warrants this product to be free of material defects in materials and workmanship when installed

and operated according to Eccotemp’s installation and operating instructions. This Limited Warranty extends to the

original purchaser and subsequent owners, but only while the product remains as the site of the original installation.

This Limited Warranty terminates if moved or reinstalled at a new location. There are no warranties, express or

implied made or given other than contained in this Limited Warranty. No agent, employee or representative of
Eccotemp has any authority to bind Eccotemp to any representation or warranty concerning the Product not
contained in this Limited Warranty. Eccotemp reserves the right and authority to change, modify or alter this
warranty at any given time.

Except as expressly set forth herein, THERE ARE NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,

INCLUDING, WITHOUT LIMITATION, AS TO MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
WITH RESPECT TO ANY GOODS SOLD HEREUNDER. BUYER’S EXCLUSIVE REMEDY IS LIMITED TO REPAIR OR
REPLACEMENT OF THE GOODS SOLD, AT ECCOTEMP’S DISCRETION. ECCOTEMP SHALL NOT BE LIABLE FOR
INCIDENTAL OR CONSEQUENTIAL DAMAGES.

Limited Warranty Period

This Warranty is extended by Eccotemp Systems to the Owner. This warranty takes eect on the date of installation
of the Product or 30 days after the date of purchase, whichever occurs rst, and is eective until the specied

anniversary of such date as follows:

1) Limited Two-Year replacement (years 1 through 2) of defective parts other than the heat exchanger- Labor not

included.

2) Limited additional Two-Year replacement (years 1 through 2) on the heat exchanger when the Product is used in a

single-family dwelling – Labor not included.

3) Limited additional Two-Year replacement (years 1 through 2) on the heat exchanger when the Product is used for

commercial capacity, if it is used in other than a single family dwelling, or if the Product is supplied with pre-heated
or circulated water – labor not included.

Item Period of Coverage

Heat Exchanger 2 years

All other parts 2 years

Coverage’s are void if the unit is used in a hot water circulation loop, in series with a circulation system or where an
on-demand recirculation system is not incorporated.

Owner is responsible for all other costs incidental to repair such as labor, shipping, delivery and permits. Proof of
purchase required. Products repaired will be covered under this Limited Warranty for the remainder of term of the
original purchase.

Shipping Related Costs:

Within the rst 30 days of purchase, Eccotemp will cover all ground shipping costs for warranty related issues,
excluding AK, HI, Canada, and any location outside of the continental US. After the rst 30 days of purchase,
Eccotemp will cover all ground non expedited shipping costs to the customer for warranty related issues, excluding
AK, HI, Canada, and any location outside of the continental US. After the rst 30 days of purchase, the customer is

responsible for all shipping to Eccotemp, regardless of reason or circumstance. The method for warranty related
shipping will be Ground equivalent with the provider of Eccotemp’s choosing.

AK, HI, Canada, and any location outside of the continental US, will be responsible for all shipping costs, regardless
of reason or circumstance.

All shipments of any type of product coming to Eccotemp for any reason must have an RGA for any repairs to be
made. Please contact Eccotemp to obtain an RGA number prior to shipping anything to Eccotemp. Failure to do
so could result in loss of product. Eccotemp will not be responsible for replacement due to loss or damage if these
steps are not properly followed.

PLEASE NOTE: i12 IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT

36

Phone: [phone] | Email: [e-mail] | Address: 315 - A Industrial RD Summerville, SC 29483

NOTICE. PLEASE VISIT WWW.ECCOTEMP.COM/SUPPORT FOR MORE INFORMATION.

Support: Eccotemp.com/help-desk Shop Online: Eccotemp.com/products Store Locator: Eccotemp.com/locator

Exclusions

Please refer to the Installation Manual and Use & Care Manual supplied with your new Eccotemp Systems product.
This Limited Warranty becomes null and void if any of the following are determined to be a contributing factor by
Eccotemp to the failure of the product:

1. Abuse, misuse, alteration, neglect or misapplication.

2. mproper, dangerous, destructive maintenance procedures or inadequate maintenance.

3. Damages caused by services performed by servicers other than Eccotemp Systems.

4. Installation in a corrosive or otherwise destructive environment.

5. Damage as a result of freezing within the unit or surrounding piping.

6. Scale buildup.

7. Incorrect gas or water pressure.

8. Acts of force Majeure.

9. Damage as a result of use with non-portable, untreated or poorly treated well water, or water with high PH

levels or hardness levels in excess of 12 grains per gallon (200mg/L).

10. Incorrect sizing for the application.

11. Products with original serial numbers that have been removed or altered and cannot be readily determined.

12. Acts of God including, but not limited to; re, ood, or nature disaster.

English

This Product is not to be used as a pool or spa heater.

In the event of an Eccotemp Systems recognized defect, malfunction, or failure to conform to this Warranty and
based upon Eccotemp approval of warranty claim, Eccotemp Systems, at its sole and absolute discretion, will settle
the warrant claim of such defect, malfunction, or failure to conform to this Warranty. In order to make a claim under
this Warranty, The Owner must notify Eccotemp of the failure of the Product to conform to this Warranty.

Under this Warranty, Eccotemp Systems will only provide replacement parts as described in the “Limited Warranty

Period”. The Owner will be responsible for any cost incurred including labor costs for servicing the unit, shipping,

delivery, and handling of the replacement part, cost for permits or materials necessary for the repair, or incidental

costs resulting from damage external to the unit resulting from the failure.

NOTWITHSTANDING ANYTHING IN THIS WARRANTY TO THE CONTRARY, EXCEPT FOR ECCOTEMP SYSTEMS’
AFFIRMATIVE OBLIGATIONS EXPRESSLY SET FORTH IN THIS WARRANTY, ECCOTEMP SYSTEMS DISCLAIMS ANY
AND ALL WARRANTIES, EITHER EXRESS OR IMPLIED, REGARDING THE PRODUCT AND ITS FUNCTIONALITY,
PERFORMANCE, MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE OR INTELLECTUAL PROPERTY RIGHTS.
ECCOTEMP SYSTEMS DISCLAIMS ALL OTHER OBLIGATIONS OR LIABILITIES ON ITS PART AND NEITHER ASSUMES
NOR AUTHORIZES ANY OTHER PERSON TO ASSUME FOR ECCOTEMP SYSTEMS AN OTHER LIABILITIES IN
CONNECTION WITH THE PERFORMANCE OF THE PRODUCT. THIS WARRANTY ONLY COVERS REPLACEMENT
PARTS AND DOES NOT COVER COST OF LABOR OR SERVICES UNDER ANY CIRCUMSTANCES.

This warranty only applies to the 50 states of the U.S.A and Territories of Canada. Eccotemp Systems shall not be
liable for any claim or demand against Eccotemp Systems by any other part for damages of any kind, including,
but not limited to incidental and consequential damages, arising out of the subject matter of this Agreement.

Some States do not allow exclusion or limitation of incidental or consequential damages, so the above limitation
or exclusion may not apply to you. This warranty gives you specic legal rights. You may also have other rights that

vary from State to State.

PLEASE NOTE: i12 IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT

NOTICE. PLEASE VISIT WWW.ECCOTEMP.COM/SUPPORT FOR MORE INFORMATION.

Phone: [phone] | Email: [e-mail] | Address: 315 - A Industrial RD Summerville, SC 29483

37