Eccotemp ET-32, ET-22, ET-14 Installation And Operating Instructions Manual

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315-A Industrial Road, Summerville, SC 29483

ECCOTEMP

ET-14 / ET-22 / ET-32

Residential Water Heaters

Installation and Operating Instruction Manual

RESIDENTIAL WATER HEATING MODELS

(NOT FOR SPACE HEATING APPLICATIONS)

OWNER’S MANUAL

READ THE GENERAL SAFETY SECTION BEGINNING ON THE NEXT PAGE AND THEN THIS
ENTIRE MANUAL BEFORE INSTALLING OR OPERATING THIS UNIT. IF YOU DON’T FOLLOW
THESE SAFETY RULES, THE UNIT MAY NOT OPERATE PROPERLY AND COULD CAUSE,
SERIOUS BODILY INJURY, PROPERTY DAMAGE AND/OR DEATH.

READ YOUR WARRANTY. WARRANTY OF YOUR UNIT WILL DEPEND ON PROPER
INSTALLATION AND OPERATION. THE WARRANTY SHALL BE VOID IF THE UNIT HAS BEEN
ALTERED IN ANY WAY WHATSOEVER. THE MANUFACTURER OF THIS HEATER WILL NOT BE
LIABLE FOR ANY DAMAGES DUE TO FAILURE TO COMPLY WITH THE INSTALLATION AND
OPERATING INSTRUCTIONS OUTLINED ON THE FOLLOWING PAGES.

THE INSTALLATION MUST CONFORM TO ALL INSTRUCTIONS IN THIS MANUAL AND TO ALL
LOCAL AND NATIONAL CODES.

IF YOU HAVE ANY QUESTIONS OR REQUIRE ANY ASSISTANCE WITH THE INSTALLATION
OR THIS UNIT, PLEASE CALL OUR CUSTOMER SERVICE DEPARTMENT AT THE NUMBERS
LISTED BELOW. PLEASE HAVE THE INFORMATION LISTED BELOW WHEN CALLING :

SERIAL #:

MODEL #:

INSTALLATION DATE:

ECCOTEMP SYSTEMS, LLC

315-A Industrial Drive

Summerville, SC 29483

866-356-1992

GENERAL SAFETY

Eccotemp residential heaters are designed to take in cold or pre-heated water
and heat it to temperatures suitable for normal domestic usage up to a maximum
of 130°F.

To obtain optimum performance and energy savings, the unit should be located as
near as possible to the point of use.

The unit is supplied with ¾” NPT plumbing connections. Do not use a torch on
any pipe connected to the heater, as serious damage will result. Use Teflon tape,
ensuring no debris enters the heater. Do not use any petroleum based pipe dope or
PVC primers or glue on the unit or any fittings connected to the unit.

Ensure that the plumbing lines are clear of installation debris before connecting
the unit.

VERIFY THAT THE HEATER HAS THE CORRECT NUMBER OF DEDICATED UNIQUE
208/240V CIRCUITS, USING CORRECTLY RATED WIRES AND CIRCUIT BREAKERS AND
THAT CIRCUIT BOARD JUMPERS ARE INSTALLED WHERE NECESSARY. FAILURE TO
GROUND THE SYSTEM MAY RESULT IN DEATH OR SERIOUS INJURY.

IMPROPER INSTALLATION, ADJUSTMENT, ALTERATION, SERVICE OR MAINTENANCE

CAN CAUSE DEATH, SERIOUS BODILY INJURY OR PROPERTY DAMAGE. REFER TO THIS
MANUAL FOR ASSISTANCE OR CONSULT QUALIFIED PERSONNEL.

HAZARD OF ELECTRICAL SHOCK! BEFORE REMOVING THE COVER OR SERVICING
THE UNIT, MAKE SURE THE ELECTRICAL SUPPLY TO THE WATER HEATER IS
DISCONNECTED. FAILURE TO DO THIS COULD RESULT IN DEATH, SERIOUS BODILY
INJURY, OR PROPERTY DAMAGE. DEPENDING ON YOUR INSTALLATION, IT MAY BE
NECESSARY TO TURN OFF MULTIPLE BREAKERS TO COMPLETELY POWER DOWN
YOUR UNIT.

WHEN INSTALLING THE UNIT IN ANY AREA WHERE LEAKS OF ANY NATURE COULD
CAUSE PROPERTY DAMAGE, A DRAIN PAN AND DRAIN LINE SUFFICIENT TO CONTAIN
THE FLOW OF WATER PROVIDED BY THE SUPPLY LINE MUST BE INSTALLED.

WHEN INSTALLING THE UNIT IN ANY AREA WHERE LEAKS OF ANY NATURE COULD
CAUSE PROPERTY DAMAGE OR ANY OTHER AREAS THAT ARE NOT READILY VISIBLE
OR ROUTINELY MONITORED INCLUDING CLOSETS, CABINETS AND ATTICS: A 150-PSI

MAXIMUM PRESSURE RELIEF VALVE WITH DRAIN LINE MUST BE INSTALLED.

WARNING!

WARNING!

WARNING!

WARNING!

TABLE OF CONTENTS

General Safety .............................................Inside Cover

Introduction to the ECCOTEMP WATER HEATER ............... 1

Features and Benefits ................................................... 2

DOs and DON’Ts ............................................................ 3

Installation Guide .........................................................4

Electrical Installation ...................................................6

Limited Warranty ........................................................ 11

Warranty Claims Procedure .........................................12

Troubleshooting Guide .................................................13

Product Specifications ................................................ 14

Parts Diagrams .......................................................... 15

Wiring Diagrams ..........................................................17

Service & Warranty Information ........... Inside Back Cover

1

INTRODUCTION

Congratulations on your purchase of the

ECCOTEMP ON-DEMAND TANKLESS WATER HEATER

You are now in a rapidly growing and highly discriminating group of individuals and businesses that:

• Prefer the freedom of managing ones own lifestyle through technologically
advanced equipment

• Have the need and desire for hot water WHEN they want it from an ENDLESS SUPPLY.

No more waiting, no more running out of hot water.

Early civilization relied on hot water springs to supply all the hot water needed for cleansing and for
therapeudic purposes. However, as civilization progressed, the accepted method of producing hot
water has become restrictive – the storage tank water heater. We have become conditioned to the
statement “We can’t do the laundry after the family showers”. Or in the winter months, “I have to
wait an hour for enough hot water to take my shower”

For the past 70 years little change has been made in the most common water heater delivery system,
the cumbersome inefficient storage tank heater that still delivers only a LIMITED SUPPLY OF HOT
WATER. Even the classic flow through water heaters around since the Victorian period are inherrently
inadequate for the lifestyle enjoyed by most of the Western world.

Only in the past several years has technology advanced to the point that:

• Metal parts used in demanding applications can be replaced with glass fiber reinforced,
heat stabilized nylon resin.

• Micro-control has reached a new high level of speed and proficiency

The Eccotemp uses a patented* technology that combines and implements the best of both. Only
Eccotemp has been able to develop a water heater that is inherently highly energy efficient, modular,
rust free, scale resistant, and endlessly responsive to the varying demands of flow.

The development of such a system was no small task. Your Eccotemp heater’s patented technology
represents the culmination of over 10 years and millions of dollars of intensive development and
testing. We have outlined what we think are major benefits in this manual. After reading the manual,
YOU DECIDE which is the most important to you.

Congratulations again. We know you are already beginning to enjoy the benefits of your new

ECCOTEMP CONTINUOUS WATER HEATING SYSTEM.

*U.S. Patents: #6,246,831 issued June 12, 2001;

#6,080,971 issued June 23, 2000;

#5,866,880 issued February 2, 1999;

#5,325,822 issued July, 1994;

#5,216,743 issued June, 1993.

In addition to the U.S. patents, there are many foreign patents issued and in process.

2

FEATURES & BENEFITS

Your Eccotemp is a CONTINUOUS WATER HEATING SYSTEM. Eccotemp Systems, LLC is the exclusive
distributor for the Eccotemp line of water heaters. Your new Eccotemp may be the last water heater
you will own. The ten-year limited warranty on the chamber body and electronic circuit board reflects
the quality of the unique design, materials and the construction of this unit (READ YOUR WARRANTY).
Your Eccotemp water heater will provide you with a continuous supply of hot water for all your hot
water requirements.

YOU CAN SAVE MONEY BY NOT WASTING ENERGY

Your Eccotemp saves energy by never reheating the same water over and over again. Additional
savings can be achieved by insulating the connections to your Eccotemp and any accessable hot water
pipes in your home.

REDUCTION IN SCALING AND MINERAL DEPOSITS

Over a short period of years, a conventional storage tank heater can accumulate large amounts of
mineral deposits and scale that are very difficult to remove. This buildup reduces the efficiency of
the heater and contributes to the failure of the tank. The use of glass fiber reinforced, heat stabilized
nylon resin in molding of the Eccotemp chamber body, combined with its patented electronically
controlled electrical delivery system, results in marked reduction in scaling and mineral deposits. Any
deposits that occur in your Eccotemp® are easily and completely discharged by occasional removal
of the service base plates.

REDUCTION OR ELIMINATION OF ODORS

Some water supplies are high in sulfur content. Your Eccotemp is designed to significantly reduce the
odors associated with the use of high sulfur content water in water heating applications.

ANOTHER WAY YOU SAVE

Because of the state-of-the-art design, you can expect a long service life from the heater
components. All maintenance, even major requirements, including replacement of the electronic
control board can easily be diagnosed and completed in minutes. In the unlikely event you do have a
problem, the ten year limited warranty (READ YOUR WARRANTY) assures you low cost replacement
even for major components.

CONTINUOUS NEVER ENDING HOT WATER

Take, ten, twenty, one hundred baths or showers one right after another and never run out of
hot water. As long as you need hot water, your Eccotemp heats the water AS YOU USE IT –

CONTINUOUSLY.

ENJOY IT ANYWHERE

Because of its compact, lightweight size, your Eccotemp not only saves space, but can be installed
anywhere electric service is available - even your second home, ranch, room addition, cabin, casita or
pool house.

SAFETY

Your Eccotemp provides safe operation with multiple safety features. For example: (1) The solid
state circuitry provides temperature control, (2) high temperature thermostats are used to alert
the control system and disengage the power supply if overheating occurs, (3) water level detector
circuitry minimizes the chance of chamber body and element damage when there is not adequate
water in the Eccotemp®; (4) In addition to surge suppression circuitry, the high power elements of
your unit are automatically disengaged from the main power supply when not in use, (5) built-in leak
detector and alarm on the unit can warn you in time to shut off the water supply to prevent flooding.

COMPLIANCE LISTINGS

U.L. 499 Listed US and Canada (Certain models as marked) “Electric Heating Appliances”
U.L. Certified in accordance with NSF/ANSI 372 for Lead Content of Products in Contact with Potable Water
U.L. – NSF Compliance with ANSI Standards 61 & 51
HUD, NEC

3

DOs & DON’Ts

Your Eccotemp is designed for easy maintenance. AVOID
INSTALLATION IN CONFINED SPACES. Allow at least 18 inches of

working space above and below your unit. Installing any water
heater in your attic or any other location that is not easily
monitored can result in unexpected property damage. Your
Eccotemp is so small and attractive, you should NEVER need to
install it in attics or areas difficult to monitor or service.

WHEN INSTALLING THE ECCOTEMP IN ANY AREA WHERE LEAKS
OF ANY NATURE COULD CAUSE PROPERTY DAMAGE OR ANY
OTHER AREAS THAT ARE NOT READILY VISIBLE OR ROUTINELY
MONITORED INCLUDING CLOSETS, CABINETS, ATTICS: A 150-PSI
MAXIMUM PRESSURE RELIEF VALVE WITH DRAIN LINE AND
A DRAIN PAN AND DRAIN LINE SUFFICIENT FOR CONTAINING
THE FLOW OF WATER PROVIDED BY THE SUPPLY LINE MUST
BE INSTALLED.

WHEN LEAVING YOUR HOME FOR MORE THAN TWO DAYS, TURN
OFF THE SUPPLY WATER OR ALTERNATIVELY THE POWER TO
THE HEATER.

Your Eccotemp should require very little maintenance. In
areas of hard water, it is advisable annually, to remove its
detachable base plates and clean out any mineral deposits
from the chambers.

NEVER POUR OR SPRAY LIQUIDS DIRECTLY ON THE UNIT
THAT MIGHT ENTER THE CASE, POSSIBLY CAUSING DAMAGE
TO YOUR UNIT.

Your Eccotemp is designed for safe operation and ease of
service. Qualified service personnel must service your unit
only. BEFORE YOUR UNIT IS TO BE SERVICED, ALWAYS TURN
OFF ALL MAIN, POWER CIRCUIT BREAKERS TO THE UNIT. After
servicing, always RUN WATER through your unit before turning
the power on.

YOUR ECCOTEMP MUST BE INSTALLED AND SERVICED BY
QUALIFIED PERSONNEL. DAMAGE TO YOUR UNIT, SERIOUS
PERSONAL INJURY OR DEATH MAY OCCUR IF INSTALLED OR
HANDLED IMPROPERLY. CARE MUST ALWAYS BE USED TO AVOID
ELECTRICAL ACCIDENTS WHEN INSTALLING OR SERVICING.
NEVER USE PARTS THAT ARE NOT ORIGINAL EQUIPMENT OR
APPROVED ALTERNATE REPLACEMENT PARTS.

Protect your Eccotemp from the weather. It is an appliance, and
you must avoid installing this Eccotemp in unprotected areas
where it might be exposed to rain, excess humidity, freezing
conditions, etc.

Your Eccotemp is designed to operate ONLY when mounted
vertically. Do not attempt to mount any other way as
permanent damage to your unit will result with possible
catastrophic failure and significant water leakage.

4

INSTALLATION GUIDE

NOTE: THIS WATER HEATER MUST BE INSTALLED TO MEET THE CURRENT NATIONAL ELECTRIC CODE,
AND ANY APPLICABLE LOCAL PLUMBING, ELECTRICAL, HEATING AND AIR CONDITIONING CODES AS
WELL AS THE FOLLOWING MANUFACTURER’S REQUIREMENTS:

WARNING: YOUR ECCOTEMP MUST BE INSTALLED AND SERVICED BY QUALIFIED PERSONNEL. DAMAGE
TO YOUR UNIT, SERIOUS PERSONAL INJURY OR DEATH MAY OCCUR IF INSTALLED OR HANDLED
IMPROPERLY. CARE MUST ALWAYS BE USED TO AVOID ELECTRICAL ACCIDENTS WHEN INSTALLING
OR SERVICING. NEVER USE PARTS THAT ARE NOT ORIGINAL EQUIPMENT OR APPROVED ALTERNATE
REPLACEMENT PARTS.

GENERAL

Unpack the water heater from the shipping carton carefully. DO NOT CUT THE SHIPPING CARTON
WITH A SHARP INSTRUMENT. Stand the unit upright and remove the plastic wrap. Locate the four (4)

mounting holes in the metal back plate. Position the unit against the wall with the two inlet and outlet
fitting tubes pointed up toward the ceiling. Refer to Mounting Clearances in this section of the manual.
Make sure the unit is level and attach to the wall with inch or larger lag bolts that are at least 1 ½
inches long. If attaching to sheet-rock or paneling, anchors or molly bolts should be used to prevent
the screws from pulling through the wall. If the water heater is to be installed on a cinder block or
concrete wall, attach a ½ or ¾ inch section of plywood (20 x 20 inches square) to the wall first, then
use wood screws to attach the water heater to the plywood.

PROPERTY DAMAGE PROTECTION

WHEN INSTALLING THE Eccotemp IN ANY AREA THAT IS NOT READILY VISIBLE OR ROUTINELY
MONITORED INCLUDING CLOSETS, CABINETS, ATTICS OR ANY OTHER AREAS WHERE LEAKS OF ANY
NATURE COULD CAUSE PROPERTY DAMAGE, A 150-PSI MAXIMUM PRESSURE RELIEF VALVE WITH
DRAIN LINE AND A DRAIN PAN AND DRAIN LINE SUITABLE FOR CONTAINING THE FLOW OF WATER
PROVIDED BY THE SUPPLY LINE MUST BE INSTALLED. WHEN LEAVING YOUR HOME FOR MORE THAN
TWO DAYS, TURN OFF THE SUPPLY WATER OR ALTERNATIVELY THE POWER TO THE HEATER.

PLUMBING CONNECTIONS

ATTACHING THE WATER SUPPLY

WARNING #1: Always use two wrenches when making any attachments of the water supply. Hold

the water heater’s inlet and outlet fittings secure while attaching the cold water and hot water lines.
Never attempt to attach water lines to the heater’s fittings without using a second wrench to hold the
fittings secure. The heater’s inlet and outlet fittings are designed to turn freely.

WARNING #2: Never solder water supply lines to the water heater’s fittings. Heat from the soldering
may damage the heat exchanger.

WARNING #3: Do not use Plumber’s Putty or PVC/CPVC primer and glue on the threads of the water
heater’s inlet and outlet fittings. Some of the putty compounds on the market are very aggressive
and could potentially dissolve the threads on the heater’s fittings. PVC/CPVC primer and glue will also
dissolve the threads on the heater’s fittings. Teflon Tape is the only sealer that should be used on the
threads of the inlet and outlet fittings.

5

TEMPERATURE & PRESSURE RELIEF VALVES

Neither Eccotemp nor the national code requires a combination temperature and pressure relief valve
for this appliance, however local codes may require it. HOWEVER, WHEN INSTALLING THE ECCOTEMP

IN ANY AREA THAT IS NOT READILY VISIBLE OR ROUTINELY MONITORED INCLUDING CLOSETS,
CABINETS, ATTICS OR ANY OTHER AREAS WHERE LEAKS OF ANY NATURE COULD CAUSE PROPERTY
DAMAGE, A 150-PSI MAXIMUM PRESSURE RELIEF VALVE WITH DRAIN LINE IS REQUIRED.

• The discharge from the temperature and/or pressure relief valve should be piped
to the ground or into a drain system to prevent exposure or possible burn hazards
to humans or other plant or animal life. Follow local codes. Water discharged from
the relief valve could cause severe burns instantly, scalds, or death.

• The temperature and/or pressure relief valve must be manually operated once a
year to check for correct operation.

• The temperature and/or pressure relief valve should be added to the hot water
outlet line according to the manufacturer’s instructions. DO NOT place any other
type valve or shut off device between the relief valve and the water heater.

• Do not plug the temperature and/or pressure relief valve and do not install any
reducing fittings or other restrictions in the relief line. The relief line should allow
for complete drainage of the valve and the line.

• If a temperature and/or pressure relief valve 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.

DRAIN PAN

The Eccotemp heater must be located in an area where water leakage of the unit or connections will
not result in damage to the area adjacent to the appliance or to lower floors of the structure. When
such locations cannot be avoided, it is required that a suitable drain pan, adequately drained, be
installed under the appliance. A splash cover must be included to protect the area of attachment to
the wall. The pan must be large enough to protect the area below the heater and must be piped to a
suitable drain with the complete drain pan/splash cover/pipe/drain combination sufficient to contain
the full flow of the supply line in the event of a leak and sufficient to prevent any property damage.

NOTE: THIS WATER HEATER MUST BE INSTALLED TO MEET THE CURRENT NATIONAL ELECTRICAL
CODE, AND ANY APPLICABLE LOCAL PLUMBING, ELECTRICAL, OR HEATING AND AIR CONDITIONING
CODES AS WELL AS THE INCLUDED MANUFACTURER’S REQUIREMENTS.

Plumbing connections with T&P Plumbing connections without T&P

6

ELECTRICAL INSTALLATION GUIDE

CONNECTION TO POWER SUPPLY

WARNING: YOUR ECCOTEMP MUST BE INSTALLED AND SERVICED BY QUALIFIED PERSONNEL. DAMAGE
TO YOUR UNIT, SERIOUS PERSONAL INJURY OR DEATH MAY OCCUR IF INSTALLED OR HANDLED
IMPROPERLY. CARE MUST ALWAYS BE USED TO AVOID ELECTRICAL ACCIDENTS WHEN INSTALLING
OR SERVICING. NEVER USE PARTS THAT ARE NOT ORIGINAL EQUIPMENT OR APPROVED ALTERNATE
REPLACEMENT PARTS.

NOTE: THIS WATER HEATER MUST BE INSTALLED TO MEET THE CURRENT NATIONAL ELECTRIC CODE,
AND ANY APPLICABLE LOCAL PLUMBING, ELECTRICAL, HEATING AND AIR CONDITIONING CODES.

Install wiring (see wiring diagram) from the unit to the Main Power Circuit Breaker Panel. Connect the
wiring to the unit as shown on the wiring diagram attached to the inside of the unit’s cover.

MOST MODELS REQUIRE MULTIPLE POWER SOURCES.
WHEN WIRED DIRECTLY TO THE BREAKER BOX,
THEY REQUIRE MORE THAN ONE DOUBLE POLE
CIRCUIT BREAKER.

RISK OF ELECTRICAL SHOCK. HEATING ELEMENT IS
NOT GROUNDED. ALL UNITS CAN HAVE MULTIPLE
POWER SUPPLIES. DISCONNECT ALL POWER
SUPPLIES BEFORE SERVICING.

IF USING STRANDED WIRE, MAKE SURE THAT
ALL STRANDS ARE IN SECURELY PLACED IN
THE TERMINAL BLOCK. A LOOSE STRAND IN
CONTACT WITH THE CIRCUIT BOARD CAN IMPAIR
PERFORMANCE OR DAMAGE THE BOARD.

HEATER SUPPLY SIDE CONNECTION

FOR TWO CHAMBER MODELS INSTALLED WITH A
SINGLE BREAKER AND WITH JUMPERS INSTALLED
ON THE CIRCUIT BOARD, ONE PAIR OF WIRES SHOULD
BE ATTACHED WITHIN THE UNIT AT POWER CIRCUIT 1
(CKT 1)-ONE WIRE TO L1 AND ONE WIRE TO L2. FOR
TWO CHAMBER MODELS INSTALLED WITH A TWO
BREAKERS AND WITH JUMPERS REMOVED (OR FOUR
CHAMBER MODELS WITH JUMPERS INSTALLED), A
SECOND PAIR OF WIRES MUST ALSO BE ATTACHED
AT POWER CIRCUIT 2 (CKT2)- ONE TO Ll AND ONE
TO L2.

FOR FOUR CHAMBER MODELS WITH JUMPERS
REMOVED, A THIRD AND FOURTH PAIR OF WIRES
ARE REQUIRED FOR POWER CIRCUITS 3 AND 4
(CKT 3 & CKT 4).

JUMPERS ARE FACTORY INSTALLED ON SMALLER
KW MODELS AND ARE INCLUDED IN THE BOX FOR
OPTIONAL INSTALLATION ON LARGER KW MODELS.
CONSULT THE WIRING DIAGRAM OR ECCOTEMP
CUSTOMER SERVICE FOR ADDITIONAL INFORMATION.

WARNING!

WHERE REQUIRED BY CODE USE A
DISCONNECT SWITCH ADJACENT TO
THE WATER HEATER. WHEN MAKING
THIS TYPE OF INSTALLATION, BE SURE
THE MAIN FEEDER WI

RES USED ARE

PROPERLY SIZED.

7

ECCOTEMP MOUNTING CLEARANCES

1

Top Clearance: For removal of heating elements and to provide room for plumbing

connections, a minimum of 12 inches is required.

2

Side Clearance: Allow an overall minimum horizontal space for the heater of 24
inches for removal of protective cover screws and access to electrical wires
entering the heater from the side.

3

Mounting Height: For safety, ease of installation and service, the suggested height
above the floor is 42 to 48 inches, (minimum 10 inches). Do not install electrical
disconnect or sub-panels below heater as this may interfere with access to the
clean out plates located under the heater.

4

Front Clearance: In the absence of a door or removal access panel in front of the
heater, allow 32 to 36 inch clearance in front of the heater for protective cover
removal and ease of service.

8

START-UP FUNCTIONAL CHECKS

PRE-POWER CHECK

• After all electrical connections have been made; every effort should

be made to verify a safe installation. Again check to be sure all
connections in the unit disconnect and/or circuit breaker panel are
secure. Check to be sure that an adequate ground has been properly
connected. Check to be sure that adequate size breakers have been
installed properly. Remember that breakers that are too large are
more dangerous than breakers that are too small.

• RUN WATER THROUGH THE UNIT UNTIL ALL AIR IS PURGED.

POWER CHECK

• Check only after the Pre-Power Check has been completed and the

unit filled with water. Turn on the Main Power Circuit Breakers. Verify
that the water heater’s GREEN POWER-ON “FLASHING” indicator light
is illuminated.

USE EXTREME CAUTION WHEN CHECKING VOLTAGE TO THE UNIT.

• Check the voltage available to each active power circuit. Eccotemp

models rated 5KW to 28KW are designed to operate from a 208V to
240V power supply. Connect a voltmeter at power circuit 1 (CKT 1)
between L1 and L2. (For models with multiple power circuits utilized,
continue to check voltage at each additional power circuit.)

OPERATIONAL CHECKS

• Turn water on MEDIUM-LOW utilizing any sink allowing water to run

for a couple of minutes to ensure that all air is purged from the unit.
You will hear a “click” as the relays on the circuit board engage. It is
normal to hear a “hissing” or “crackling” noise from the heat exchanger
after the unit is started. With the unit’s cover removed, verify with an
ammeter that there is ELECTRICAL CURRENT through each heating
element circuit. DISREGARD THE WATER TEMPERATURE WHILE DOING
THIS TEST.

• TURN OFF FAUCETS after completing Operational Check.

• Thermostat settings are factory preset to approximately 120°F and are

adjustable with the potentiometer on the board.

A QUALIFIED AND LICENSED CONTRACTOR MUST

PERFORM THIS INSTALLATION.

Refer to your local electrical and plumbing codes for additional information

9

After the initial start-up, following the Pre-Power and Operational Checks described
in the Electrical Installation section of this manual, it may be necessary to make
adjustments to the system to insure that the water heater is functional and providing
hot water.

BEEPS & FLASHING LIGHTS – WHAT DO THEY MEAN?

It is normal at start-up or any time the water heater is powered-on for the control
board to beep and the LED to flash red and then green. Normal status of the heater
is for the control to flash all green repeatedly. The initial 2 to 4 red flashes and
beeps after power-on are normal, but should not continue.

ECCOTEMP PROVIDES ON-BOARD SELF-DIAGNOSTICS

However, in the event that the LED light continues to flash a red sequence after
power-on, then there may be a need for further investigation. The heater’s control
provides self diagnostics by emitting a red flashing code. The code definitions and
possible solutions can be found in the Troubleshooting section of the Eccotemp
Service Manual.

Some of the most common problems discovered during installation and initial start­up are as follows:

• Circuit breakers are not turned-on (especially, heaters with
multiple circuits)

• Incoming power wires to the water heater are out-of-phase
(heaters with multiple circuits)

• Water supply valve not turned-on, no water in the heater chamber

• Water supply lines are reversed; hot and cold reversed

• Water supply connection(s) are leaking

• T&P Relief Valve (where required by local code) is leaking or
stuck open

THE ECCOTEMP HEATER ALERTS THE USER OF WATER LEAKS!

Diagnostic codes are designed to tell the installer or user if there is a problem and
what the problem might be. Also, the water heater has a built in alarm that will
sound if there is water leaking onto the water heater, possibly from a leaky water
line connection or from a leaky T&P Relief Valve. Check equipment connected nearby
the water heater for the possibility of leaks and spraying onto the water heater. It is
important to turn off all of the circuit breakers and water supply to the water heater
whenever a leak is detected to prevent possible damage to the control board. After
the leak is discovered and repaired, it is important to dry any moisture or water
accumulation on the water heater. This can be done with a standard household hair
dryer or dry towel. Any attempts to dry the water heater should be done with all the
power off to the water heater.

10

SYSTEM MATCH – FAUCETS AND HEATER

When a Eccotemp water heater is selected for the home or building, the faucets should also be
selected to match the flow rating and temperature rise specifications of the heater. The Eccotemp
water heater specifications can be found in the Product Description and Specifications section of the
Product Guide. Sometimes, this is overlooked and the user discovers that the faucets in the home are
a higher flow rate than the design of the Eccotemp model(s) selected.

SOLUTIONS FOR HIGH FLOW APPLICATIONS

Another oversight may be the lifestyle of the user. For instance, if the user wants to take two
showers at the same time or run the washing machine and the bathtub at the same time, then the
flow rate demands of the water heater are increased, sometimes beyond the capability of the
Eccotemp heater. Multiple Eccotemp heaters are used for higher flow applications, such as for
multiple task lifestyles, whirl pool and Jacuzzi tubs and body spa showers as well. Refer to Product
Applications and Diagrams section of the Product Guide for recommended multiple Eccotemp heater
arrangements. Note, it is important to evaluate the electrical capacity of the home or building when
selecting multiple Eccotemp heaters for a high flow application. Refer to the Electrical Service
Requirements and Sample Load Calculations section in the Product Guide.

Typical Flow-Use Rates in Gallons per Minute (GPM)

TEMPERATURE ADJUSTMENT

After the water heater has been installed and the operational checks are completed, the output of the
hot water can be measured and adjusted if necessary. The temperature adjusting knob can be found
on the left side of the control board. The factory setting is usually between 118 and 122 degrees F.
The knob will usually be in the 2 to 3 o’clock position. Turning the knob to the left decreases the
temperature and turning it to the right increases the temperature.

Note: it is important to understand the effects of increasing the temperature above the factory
setting as follows:

• A higher temperature setting could cause the water heater to use more power, thus
energy savings are reduced.

• A higher temperature setting could increase the potential for scaling and sediment
build-up.

• The water heater may not achieve a higher temperature setting, if the flow rate is
greater than its designed temperature rise capacity. Check to insure that the proper
size model has been chosen for the application.

Fixture

Type

Lavatory Bathtub Shower

Kitchen

Sink

Pantry

Sink

Laundry

Sink

Dishwasher

Flow

Rates

0.5-1.5 2.0-4.0 1.5-3.0 1.0-1.5 1.5-2.5 2.5-3.0 1.0-3.0

11

LIMITED WARRANTY

Eccotemp Systems, LLC, hereinafter Eccotemp, warrants the Chamber Body of its ET Series residential water
heaters against defects in materials and workmanship for three (3) years. The Chamber Body as referred to
herein shall mean the plastic body of the heat exchanger only, and does not include component parts attached
to it. Eccotemp warrants the electronic Circuit Board for a period of 18 months. Eccotemp warrants all other
component parts to be free of defects in materials and workmanship for a period of one year. This warranty
begins on the date of original retail purchase or, in the absence of proof of purchase, from the date indicated by
the serial number affixed to the water heater.

Eccotemp reserves the right to use reconditioned or remanufactured parts and units when repair or replacement
becomes necessary. During the first year of this warranty, Eccotemp will reimburse up to 1 hour of reasonable
labor expenses to a maximum of $95.00 to repair any defects in material or workmanship under the terms of
this warranty. All costs for shipping and handling are NOT included in this warranty including the cost of return.
When advance shipping is requested, full payment for replacement parts and shipping is required. Upon return,
review and inspection of the returned parts for warranty coverage, the purchase price of the parts deemed to be
covered by warranty, will be refunded to the customer. An RMA number is required for all returns to Eccotemp.

Circuit Board or Chamber Body replacements to the original purchaser, made after the initial warranty expires
and not later than ten years will be replaced by Eccotemp, subject to replacement charges not to exceed 25%
of the current manufacturer’s suggested retail price of the unit model for which it was originally installed, or a
currently sold comparable unit. Shipping charges are not included.

EXCLUSIONS AND LIMITATIONS OF THESE LIMITED WARRANTIES

THE LIMITED WARRANTIES PROVIDED HEREIN ARE IN LIEU OF ANY AND ALL WARRANTIES, EXPRESSED OR
IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND THE FITNESS FOR
A PARTICULAR PURPOSE; PROVIDED, HOWEVER, THAT IMPLIED WARRANTIES ARE NOT DISCLAIMED DURING THE
ONE YEAR PERIOD FROM THE DATE OF ORIGINAL RETAIL PURCHASE.

ECCOTEMP SHALL HAVE NO LIABILITY HEREUNDER EITHER DIRECT OR CONTINGENT, FOR INCIDENTAL OR
CONSEQUENTIAL DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL
OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU.

This warranty gives you specific legal rights, and you may have other rights THAT vary from state to state.
These warranties shall be void and have no effect:

• If the Eccotemp heater is not used for its intended application;

• If the design or structure of the Eccotemp heater is modified or altered in any way;

• If appliances or equipment not approved by Eccotemp are attached to the water heater;

• If the water heater is not property installed in compliance with the latest issue of (1) the
National Electric Code, (2) the applicable plumbing codes, (3) all local ordinances and
regulations pertinent to similar water heaters, and (4) the manufacturer’s recommendations
and guidelines contained in this and other documents included with the water heater;

• If the Eccotemp water heater is not operated within the factory calibrated temperature limits;

• If leaks in the tank or defects in other parts arise as the result of improper use, improper
installation, negligence in operation, failures resulting from accident, or from inability of the
Eccotemp water heater or any parts to function because of improperly made replacements and
repairs, or damage by fire, floods, lightning, or any other act of God;

• If the plumbing design allows reverse flow through the Eccotemp heater;

• If the Eccotemp heater element or elements fail due to air entrapment;

• If the Eccotemp heater or connecting water lines are allowed to freeze;

• If the serial number label has been altered or removed;

• If the Eccotemp heater is installed in any area where it is not routinely monitored for proper
operation or leakage of the tank or connections would result in property damage of any kind,
or where such a location is unavoidable, a suitable drain pan was not installed under the water
heater along with a 150 PSI maximum pressure relief valve;

• If the Eccotemp heater or any of its components warranted herein are used other than as a part
of the complete and integrated system as sold to the original purchaser;

• If leaks in the tank or defects in other parts arise as a result of (1) being operated with deionized
water, (2) as a result of sizing that does not comply with the manufacturer’s published sizing
recommendations, (3) use with preheated water in excess of 140°F without the use of an
approved tempering valve, or (4) operation above 100 PSI.

Replacements and/or repairs furnished under warranty carry only the unexpired portion of the original warranty
or 90 days whichever is longer.

The terms of this warranty may not be varied by any person whether or not purporting to represent or act on
behalf of Eccotemp.

12

WARRANTY CLAIMS PROCEDURE

RETURN MATERIAL AUTHORIZATION (RMA) – Upon verifying that a unit or part is covered under

warranty, service personnel must complete a “Return Material Authorization” with the following
nformation:

1. Model and SERIAL NUMBER 5. Date of original installation

2. Name of owner 6. Customer’s replacement parts

3. Service address 7. Shipping address

4. Defective part 8. Payment information for Shipping

Replacement unit/parts(s) will be shipped when the unit/part(s) have been received, inspected and
verified to be under warranty. Or if the customer desires, the unit/parts will be advance shipped
with prepayment immediately. If the unit/part(s) are advance shipped Eccotemp will reimburse the
customer for the cost of the unit/part(s) upon receipt inspection and verification that a defective
unit/part is covered by a warranty. SHIPPING COSTS FOR PARTS OR UNITS RETURNED TO THE
MANUFACTURER ARE TO BE PREPAID BY CLAIMANT AND SUCH SHIPPING COSTS ARE NOT COVERED IN
THE WARRANTY. Return the completed “Return Merchandise Authorization” to Eccotemp Systems, LLC
clearly identifying the unit or part(s) and nature of defect. Any return shipment must have the RMA
number clearly marked on the package or it may be refused.

If service personnel have repaired the unit to operable condition with their own inventory, Eccotemp
Systems, LLC, upon receipt of defective parts, will replace or issue credit for those parts verified to
be under warranty.

Owner must promptly notify the installing contractor/dealer to obtain service under warranty.
Prepare to give the nature of the problem, the model and serial number of the heater, and the date
of original purchase. If for any reason the installing contractor/dealer cannot be located or fails
to provide satisfactory warranty service, the Owner should contact Eccotemp Systems, LLC by
telephone or mail.

Eccotemp Systems, LLC

315-A Industrial Road

Summerville, SC 29483

866-356-1992

[e-mail]

REFER TO YOUR MANUFACTURER’S LIMITED WARRANTY

FOR COMPLETE DETAILS

This product was manufactured under quality control guidelines established by the manufacturer.
Certification Approvals received by this product after extensive testing were received with the
component parts chosen and installed by the manufacturer.

FAILURE TO USE EQUIPMENT, COMPONENT PARTS APPROVED BY THE MANUFACTURER VOIDS ALL
WARRANTIES. FAILURE TO USE MANUFACTURER’S APPROVED COMPONENT PARTS MAY RESULT IN
BODILY INJURY INCLUDING DEATH AND/OR DAMAGE TO PROPERTY.

13

TROUBLESHOOTING GUIDE

SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION

Unit “Clicks” periodically when
no hot water is being used

Cold water use causes reverse
flow through heater.

Unit has been in standby for
an extended period with no hot
water use.

Install check valve on outlet

NORMAL OPERATION. Unit will
activate as needed to maintain
a reference temperature to
ensure a quick start-up on the
next use.

Hot water supply is warm but
does not get HOT!

FLOW is too high.*

ONE OF THE MAIN POWER
BREAKERS may be tripped.

BAD Element or Sensor.

Reduce flow.

Check power panel. Reset
breaker if tripped.

Call local service contractor.**

Hot water supply is COLD! FLOW is too high.*

HIGH TEMPERATURE LIMIT
SWITCH may be tripped.

ONE OF THE MAIN POWER
BREAKERS may be tripped.

BAD Heating Element or
Temperature Sensor.

CIRCUIT BOARD failure.

Reduce flow.

Verify if Limit Switch is tripped.
Reset if tripped.

Check power panel. Reset
breaker if tripped.

Call local service contractor.**

Call local service contractor.**

Hot water temperature
fluctuates.

FLOW is too high.*

ONE OF THE MAIN POWER
BREAKERS may be tripped.

BAD Heating Element.

BAD Temperature Sensor.

Reduce flow.

Check power panel. Reset
breaker if tripped.

Call local service contractor.**

Call local service contractor.**

* Do not attempt to fill a large bathtub at full faucet flow. Tub faucets are designed to dump hot
water from a storage tank heater to maximize the useful quantity available. Your Eccotemp will take
longer to fill a tub, especially in the cooler months of the year but you will have continuous hot water
for as long as you wish to bathe for as many baths as you desire.

** Check listings in your area for local Heating & Plumbing or Appliance Repair companies for labor
estimates. Check for Warranty coverage on labor charges. For further assistance, call Eccotemp at
866-356-1992, Eastern Time, during regular business hours for available parts, diagnostics and repair
information or email [e-mail].

14

PRODUCT SPECIFICATIONS

PHYSICAL DESCRIPTION

Model &

Number

Height Width Depth

Pipe Size

(NPT)

Approx.

Shipping

Weight

Two

Chamber

15 ¾” 10 ¼” 6 ¼” ¾” 17 lbs.

Four

Chamber

15 ¾” 15 ¾” 6 ¼” ¾” 23 lbs.

RATINGS - ELECTRICAL

Model &
Number

Kilowatts

(KW)

Voltage

(VAC)

Maximum

Amperes

(AMPS)

Number of Circuit Breakers,

Type & Amp Rating

Without Jumpers With Jumpers

ET-14 14 240 58 (2) 2-pole, 30A

1

(1) 2-pole, 60A

ET-16 16 240 67 (2) 2-pole, 40A (1) 2-pole, 70A

1

ET-18 18 240 75 (2) 2-pole, 40A

1

(1) 2-pole, 75A

ET-22 22 240 91 (4) 2-pole, 25A

1

(2) 2-pole, 50A

ET-28 28 240 116 (4) 2-pole, 30A (2) 2-pole, 60A

1

ET-32 32 240 134 (4) 2-pole, 40A (2) 2-pole, 70A

1

1

Optional wiring method shown in italics – VERIFY CORRECT JUMPER INSTALLATION on control board
when using a single breaker for two Chamber Models or 2 breakers for Four Chamber models. Be
sure to REMOVE JUMPERS when using two breakers for two chamber models or 4 breakers for four
chamber models. Jumpers are included with heater when not factory installed for use with optional
wiring methods

15

FOUR CHAMBER MODELS

INTERNAL WORKINGS AND PARTS IDENTIFICATION

LEGEND

1. Heating Element #1

2. Heating Element #2

3. Heating Element #3

4. Heating Element #4

5. Inlet Water Tube, ¾” NPT

6. Water-Level Detect Screw

7. Water-Level Detect Screw

8. Outlet Water Tube, ¾” NPT

9. Disable, Demand Control

10. Transformer

11. Heating Element Relays (8 ea.)

12. LED Light Indicator

13. Audible Speaker

14. Output Temperature Control

15. Microprocessor Control Chip

LEGEND

16. Blue Button; Manual Audible Activation

17. Terminal Spades for Leak Detect Wires

18. Triacs (4 each)

19. Triac Mounting Blocks to Heat Sink (4 ea.)

20. Copper Heat Sink Tube

L1 – Power Connection Lugs (208 – 240 VAC)
L2 – Power Connection Lugs (208 – 240 VAC)

Limit: Over Temperature Limit Switches (2)

TH-IN: Inlet Temperature Sensor
TH-1: Chamber Temperature Sensor #1
TH-2: Chamber Temperature Sensor #2
TH-3: Chamber Temperature Sensor #3
TH-4: Chamber Temperature Sensor #4

16

TWO CHAMBER MODELS

INTERNAL WORKINGS AND PARTS IDENTIFICATION

LEGEND

1. Heating Element #1

2. Heating Element #2

3. Inlet Water Tube, ¾” NPT

4. Water-Level Detect Screw

5. Outlet Water Tube, ¾” NPT

6. Disable, Demand Control

7. Heating Element Relays (4)

8. Transformer

9. LED Light Indicator

10. Audible Speaker

11. Output Temperature Control

12. Microprocessor Control Chip

13. Blue Button; Manual Audible Activation

LEGEND

14. Triacs (2)

15. Triac Mounting Blocks to Heat Sink (2)

16. Copper Heat Sink Tube

L1 – Power Connection Lugs (208 – 240 VAC)
L2 – Power Connection Lugs (208 – 240 VAC)

Limit: Over Temperature Limit Switch

TH-IN: Inlet Temperature Sensor
TH-1: Chamber Temperature Sensor #1
TH-2: Chamber Temperature Sensor #2

17

WIRING DIAGRAMS

TWO CHAMBER - SINGLE CIRCUIT

18

WIRING DIAGRAMS

TWO CHAMBER - DUAL CIRCUITS

19

WIRING DIAGRAMS

FOUR CHAMBER - DUAL CIRCUITS

20

WIRING DIAGRAMS

FOUR CHAMBER - FOUR CIRCUITS

21

SERVICE & WARRANTY RECORD

Purchased from:

Date of Purchase: Serial #:

Name: Model #:

Address: Phone:

NOTES AND SERVICE:

Your Eccotemp can be serviced by most major brand authorized
appliance repair or heating and plumbing centers in your area. If your
preferred service center does not already have service information,
Eccotemp Systems, LLC, will, upon request and with no charge,
promptly fax the information to the service center. For information
regarding service companies in your immediate area you may contact
your original installer or Eccotemp Systems, LLC.

ECCOTEMP SYSTEMS, LLC

315-A Industrial Road, Summerville, SC 29483

Toll Free

866-356-1992

www.Eccotemp.com

22

Product Support

Eccotemp.com/help-desk

Shop Online

Eccotemp.com/products

Store Locator

Eccotemp.com/locator

866-356-1992 [e-mail]

315-A Industrial Road, Summerville, SC 29483

ECCOTEMP

ET-14 / ET-22 / ET-32

Residential Water Heaters

Installation and Operating Instruction Manual