Stiebel Eltron B1120993 User Manual

OPERATION AND INSTALLATION
OPERACIÓN E INSTALACIÓN
UTILISATION ET INSTALLATION

TANKLESS ELECTRIC WATER HEATER WITH ELECTRO-MECHANICAL FLOW SWITCH
CALENTADOR ELÉCTRICO DE AGUA SIN TANQUE CON SENSOR ELECTROMECÁNICO DE FLUJO
CHAUFFE-EAU ELECTRIQUE SANS RESERVOIR AVEC CONTACTEUR DEBITMETRIQUE
ELECTRO-MECANIQUE

» MINI™ 2
» MINI™ 2.5
» MINI
» MINI
» MINI™ 4
» MINI™ 6

™

™

3

3.5

The Mini™ series is
tested and certifi ed
by WQA against NSF/
ANSI 372 for lead free
compliance.

STIEBEL ELTRON, Inc.

17 West Street | West Hatfi eld, MA 01088
Tel. [phone] | Fax [phone]
Email [e-mail]
www.stiebel-eltron-usa.com

CONTENTS | OPERATION

1. General Information _________________________________ 3

1.1 Symbol key __________________________________________ 3

2. Safety precautions __________________________________ 4

3. Register your product _______________________________ 4

4. Temperature increase above ambient water
temperature__________________________________________ 5

5. Technical drawings __________________________________ 5

6. Overview _____________________________________________ 7

6.1 Figure legend _______________________________________ 7

6.2 General description ________________________________ 7

6.3 Important information before supplying power
to unit ________________________________________________ 8

6.4 Hot water output ___________________________________ 8

6.5 Incorrect use ________________________________________ 8

6.6 First steps to be taken in the event of
malfunction _________________________________________ 8

6.7 Maintenance and care _____________________________ 8

7. Operating and installation instructions ____________ 9

7.1 Mounting the unit __________________________________ 9

7.2 Plumbing connections _____________________________ 9

7.3 Electrical connection _______________________________ 9

8. Initial start-up ______________________________________ 10

9. Water heater hand over ____________________________ 10

10. Normal maintenance _______________________________ 10

11. Technical data ______________________________________ 11

12. Troubleshooting ____________________________________ 11

13. Spare parts _________________________________________ 12

14. Warranty ____________________________________________ 12

2 | MINI™ SERIES TANKLESS ELECTRIC WATER HEATERS WWW.STIEBEL-ELTRON-USA.COM

GENERAL INFORMATION

m

th

t

t

GENERAL INFORMATION

1. General Information

Read this entire manual. Failure to follow all the guides,
instructions and rules could cause personal injury or
property damage. Improper installation, adjustment,
alteration, service and use of this unit can result in
serious injury.

This unit must be installed by a licensed electrician and
plumber. The installation must comply with all national,
state and local plumbing and electric codes. Proper
installation is the responsibility of the installer. Failure to
comply with the installation and operating instructions
or improper use voids the warranty.

Save these instructions for future reference. Installer
should leave these instructions with the consumer.

If you have any questions regarding the installation,
use or operation of this water heater, or if you need any
additional installation manuals, please call our technical
service line at 800-582-8423 (USA and Canada only). If
you are calling from outside the USA or Canada, please
call USA 413-247-3380 and we will refer you to a qualifi ed
Stiebel Eltron service representative in your area.

1.1 Symbol key

1.1.1 Layout of safety information

1

1 Symbol (see 1.1.2 "Symbols")
2 Keyword (see 1.1.3 "Keywords")
3 Designations (see 1.1.2 "Symbols")
4 Information text

1.1.2 Symbols

Symbol Description

2

DANGER Electric shock

Before any work on the appliance,
disconnect all poles from the
power supply.

Injury

Electrocution

Burns or scalding

Other situations

!

3

ENGLISH

e

4

THIS IS THE SAFETY ALERT SYMBOL. IT IS USED

!



TO ALERT YOU TO POTENTIAL PERSONAL INJURY
HAZARD. OBEY ALL SAFETY MESSAGES THAT FOLLOW
THIS SYMBOL TO AVOID POSSIBLE INJURY OR DEATH.

The chapter Operation is intended for homeowners,
heating contractors, plumbers and electricians.

The chapter Installation is intended for heating contractors,
plumbers and electricians only.

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1.1.3 Keywords

KEYWORD

DANGER The keyword DANGER indicates

information that must be observed,
otherwise serious injury or death
will result.

WARNING The keyword WARNING indicates

information that must be observed,
otherwise serious injury or death
may result.

CAUTION The keyword CAUTION indicates

information that must be observed,
otherwise relatively serious or light
injuries may result.

GENERAL INFORMATION

SAFETY PRECAUTIONS

2. Safety precautions

PLEASE READ AND FOLLOW THESE

!



INSTRUCTIONS. FAILURE TO FOLLOW THESE
INSTRUCTIONS COULD RESULT IN SERIOUS BODILY
INJURY OR DEATH.

THE UNIT MUST BE INSTALLED BY A LICENSED
ELECTRICIAN AND PLUMBER. THE INSTALLATION
MUST COMPLY WITH ALL NATIONAL, STATE AND LOCAL
PLUMBING AND ELECTRIC CODES.

SERVICE OF THE UNIT MUST BE PERFORMED BY
QUALIFIED SERVICE TECHNICIANS.

BEFORE PROCEEDING WITH ANY INSTALLATION,



ADJUSTMENT, ALTERATION, OR SERVICE OF
THIS UNIT ALL CIRCUIT BREAKERS AND DISCONNECT
SWITCHES SERVICING THE UNIT MUST BE TURNED
OFF. FAILURE TO DO SO COULD RESULT IN SERIOUS
PERSONAL INJURY OR DEATH.

DANGER: NEVER REMOVE THE UNIT'S COVER



UNLESS THE ELECTRICITY SERVICING THE UNIT
IS TURNED OFF. FAILURE TO DO SO COULD RESULT IN
PERSONAL INJURY OR DEATH.

WARNING: THE UNIT MUST BE PROPERLY



GROUNDED. FAILURE TO ELECTRICALLY
GROUND THE PRODUCT COULD RESULT IN SERIOUS
PERSONAL INJURY OR DEATH.

DANGER: WATER TEMPERATURES OVER 125°F



CAN CAUSE SEVERE BURNS INSTANTLY OR
DEATH FROM SCALDING. A HOT WATER SCALDING
POTENTIAL EXISTS IF THE THERMOSTAT ON THE
UNIT IS SET TOO HIGH. HOUSEHOLDS WITH SMALL
CHILDREN, DISABLED OR ELDERLY PERSONS MAY
REQUIRE THAT THE THERMOSTAT BE SET AT 120°F
OR LOWER TO PREVENT POSSIBLE INJURY FROM HOT
WATER.

3. Register your product

YOU MUST REGISTER THIS PRODUCT WITHIN



90 DAYS OF PURCHASE ON OUR WEB SITE IN
ORDER TO ACTIVATE THE STANDARD WARRANTY OR
TO BE ELIGIBLE FOR THE EXTENDED WARRANTY. GO
TO OUR WEB SITE AT WWW.STIEBEL-ELTRON-USA.COM
AND CLICK ON REGISTER YOUR PRODUCT.

Before beginning the registration process, we suggest
that you gather the necessary information which will
be as follows:

Type, Example: Mini 3 (from the white label that is on
the right side of the unit)

Number listed after "Nr."
Place of Purchase
Purchase Date
First & Last Name
Email address
Physical Address
Phone Number

IF YOU HAVE ANY QUESTIONS CONCERNING THE REG­ISTRATION PROCESS OR WARRANTY OPTIONS, PLEASE
CONTACT STIEBEL ELTRON USA DIRECTLY AT (800)-582-

8423.

Limited liability warranty:

Stiebel Eltron, Inc. is not liable for damages to the unit,
damage to personal property, bodily injury, or loss of life
due to the following conditions:

- Non-observance of these instructions

- Incorrect use (heating any other liquid than water)

- Installation of the appliance by unqualifi ed personnel

- Unauthorized modifi cations

-Technical modifi cations

- Use of unauthorized spare parts

THE THREE YEAR WARRANTY COVERS ALL PARTS
BUT DOES NOT COVER DAMAGE TO THE UNIT DUE TO
HARD WATER (FOR THE COMPLETE WARRANTY SEE
"Warranty", SECTION 14 PG. 12). IF YOU KNOW OR
SUSPECT THAT THE WATER IN YOUR AREA IS HARD
(HAS A HIGH MINERAL CONTENT), IT IS NECESSARY
TO INSTALL A WATER SOFTENING DEVICE TO AVOID
DAMAGE TO THE Mini UNIT.

4 | MINI™ SERIES TANKLESS ELECTRIC WATER HEATERS WWW.STIEBEL-ELTRON-USA.COM

GENERAL INFORMATION

TEMPERATURE INCREASE ABOVE AMBIENT WATER TEMPERATURE

4. Temperature increase above ambient water temperature

[ °F ]

Type kW GPM

0.32 0.42 0.48 0.5 0.69 0.85 1.06 1.14

Mini 2* 1.8 38 – – – – – – –

Mini 2.5

2.4 – 39 34 33 24 – – –

Mini 3

3.0 – 49 43 41 30 – – –

Mini 3.5

3.5 – 57 50 45 35 – – –

Mini 4

3.5 – 57 50 45 35 – – –

Mini 6

5.7 – – – – – 46 37 34

Min. water fl ow to activate unit.

[ °C ]

Type kW l/min

1.2 1.6 1.8 2.0 2.6 3.2 4.0 4.3

Mini 2* 1.8 22 – – – – – – –
Mini 2.5

2.4 – 22 19 17 13 – – –

Mini 3

3.0 – 27 24 22 17 – – –

Mini 3.5

3.5 – 31 28 25 19 – – –

Mini 4

3.5 – 31 28 25 19 – – –

Mini 6

5.7 – – – – – 26 20 19

Min. water fl ow to activate unit.

* Note: Mini 2 is internally restricted to 0.32 gpm (1.2 l/min)

ENGLISH

5. Technical drawings

A

mm)

” (143

8

5

5/

1

¾

” (120 mm)

4

7 ½ ” (190 mm) 3 ¼ ” (82 mm)

4

” (4,8 mm)

6

3

16 ” (30 mm)

1/

1

/

3

3 ¾ ” (95 mm)

2

3

mm)

6 ½ ” (165

3/8“ O.D.
flex connector

13

/16 ” (20 mm)

C26_02_05_0009

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GENERAL INFORMATION

TECHNICAL DRAWINGS

CB

D

9

5

10

8

7

6

C26_02_05_0010

™

4/6

V >

p >

L N

L N GRD Mini™ 2/3/2.5/3.5
L L GRD Mini

6 | MINI™ SERIES TANKLESS ELECTRIC WATER HEATERS WWW.STIEBEL-ELTRON-USA.COM

OPERATION

OVERVIEW

THIS MANUAL MUST BE READ CAREFULLY BEFORE ATTEMPTING TO INSTALL THE Mini WATER HEATER. IF
YOU DO NOT FOLLOW THE SAFETY RULES OR THE INSTRUCTIONS OUTLINED IN THIS MANUAL, THE UNIT MAY
NOT OPERATE PROPERLY AND IT COULD CAUSE PROPERTY DAMAGE, SERIOUS BODILY INJURY AND/OR DEATH.

Stiebel Eltron, INC. WILL NOT BE LIABLE FOR ANY DAMAGES BECAUSE OF FAILURE TO COMPLY WITH THE
INSTALLATION AND OPERATING INSTRUCTIONS OUTLINED IN THIS MANUAL OR BECAUSE OF IMPROPER USE.
IMPROPER USE INCLUDES THE USE OF THIS APPLIANCE TO HEAT ANY LIQUID OTHER THAN WATER. FAILURE TO
COMPLY WITH THE INSTALLATION AND OPERATING INSTRUCTIONS OR IMPROPER USE VOIDS WARRANTY. NEVER
REMOVE THE UNIT’S COVER UNLESS THE ELECTRICITY IS TURNED OFF.

IF YOU HAVE ANY QUESTIONS REGARDING THE INSTALLATION OR OPERATION OF THIS WATER HEATER, OR IF YOU
NEED ANY ADDITIONAL INSTALLATION MANUALS, PLEASE CALL OUR TECHNICAL SERVICE LINE ON 800-582-8423
(USA AND CANADA ONLY). IF YOU ARE CALLING FROM OUTSIDE THE U.S. OR CANADA, PLEASE CALL USA 413­247-3380 AND WE WILL REFER YOU TO A QUALIFIED Stiebel Eltron SERVICE REPRESENTATIVE IN YOUR AREA.

6. Overview

ENGLISH

6.1 Figure legend

1 Hot water connection
2 Cold water connection with fi lter screen
3 Filter screen
4 Mounting holes
5

Electrical junction box
6 Water supply line for faucet installation
7 Sink
8 Cold valve (right)
9 Hot valve (left)
10

Shut off valve
11

Reset button from safety pressure cut out

6.2 General Description

The Mini tankless water heater differs from
conventional storage type water heaters in several
ways. It does not store hot water. Instead, water is
heated instantaneously as it fl ows through the unit.
The powerful heating elements are activated by a
fl ow switch as water is drawn from a hot water faucet
connected to the Mini. Due to the absence of stand-by
losses, the Mini offers greater energy effi ciency than
storage type water heaters. The unit will continuously
supply hot water as long as the faucet is open

water fl ow rate through the unit. In order for the Mini
to operate properly, it must be carefully matched to the
application.
In case you have questions regarding the way you plan
to use the Mini, please call our technical service line at
800-582-8423 (USA and Canada). For service outside the
U.S. and Canada, please call us at USA 413-247-3380.
You can also e-mail us at [e-mail]
or fax us at 413-247-3369.

The Mini can be used for hand washing type
applications in the U.S. and Canada:

– Restroom sinks in commercial/industrial facilities
and homes
– Kitchen areas in commercial /industrial facilities
and homes
– Cabins
– Special uses in photo developing shops,
laboratories etc.

The Mini can also be used for whole apartments and
homes in warm climate zones such as the Caribbean
region, Central America and Mexico due to the higher
ambient water temperatures.

The temperature of the hot water delivered by the
Mini depends on the wattage of the heating element,
the temperature of the incoming cold water, and the

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OPERATION

OVERVIEW

6.3 Important information before supplying
power to unit

Air in the cold water pipe will destroy the bare-



wire heating system of the Mini. If the water
supply to the Mini has been interrupted, for example
due to the risk of frost or work on the water pipe, the
following steps must be carried out before the unit is
used again.

» 1. Turn off circuit breaker.
» 2. Open a hot water tap downstream of the unit for as

long as is necessary for the unit and the cold water
pipe to be free of air.

» 3. Turn on circuit breaker.

All information in these Instructions for Use and
Installation must be followed carefully. They provide
important information with regard to safety,
operation, installation, and maintenance of the
device.

6.4 Hot water output

Model Wattage Typical hot water

output

Mini 2* 1.8 kW 0.32 GPM
Mini 2.5 2.4 kW 0.50 GPM
Mini 3 3.0 kW 0.50 GPM

6.5 Incorrect use

The following are not permitted and will void the factory
warranty:

- Installation of the appliance where it is at risk
from frost

- Installation in rooms where the appliance is at risk
from explosions as a result of dust, gases or vapors

- Ignoring safety clearances and safety zones

- Incorrect power connection

- Operation of the appliance without water fl owing
through the unit, or with air in the lines (see "Initial
startup", section 8, pg. 10)

- Operation of the unit with the cover off

- Heating liquids other than potable water

6.6 First steps to be taken in the event of
malfunction

WARNING: ALWAYS SHUT OFF POWER AND



WATER TO THE UNIT PRIOR TO REMOVING THE
FILTER SCREEN. FAILURE TO DO SO MAY CAUSE SERIOUS
BODILY INJURY OR DEATH.

» Check the circuit breaker
» Check the fi lter screen for scale blockage or dirt

accumulation. See also ”Troubleshooting” section 10
pg. 11.

6.7 Maintenance and care

Mini 3.5 3.5 kW 0.66 GPM
Mini 4 3.5 kW 0.66 GPM
Mini 6 5.7 kW 1.00 GPM

*Note: Mini 2 is internally restricted to 0.32 GPM

8 | MINI™ SERIES TANKLESS ELECTRIC WATER HEATERS WWW.STIEBEL-ELTRON-USA.COM

OUT BY A QUALIFIED INSTALLER.

THE FILTER SCREEN. FAILURE TO DO SO MAY CAUSE
SERIOUS BODILY INJURY OR DEATH.

Regularly clean and descale the fi lter screen located in
the cold water inlet connection and if necessary replace.
Always shut off power and water to the unit prior to
removing the fi lter screen.

A damp cloth is suffi cient for cleaning of the unit's housing.
Do not use any abrasive or corrosive cleaning agents.

MAINTENANCE WORK, SUCH AS CHECKING

!



ELECTRICAL SAFETY, MAY ONLY BE CARRIED

WARNING: ALWAYS SHUT OFF POWER AND



WATER TO THE UNIT PRIOR TO REMOVING

INSTALLATION

OPERATING AND INSTALLATION INSTRUCTIONS

7. Operating and installation
instructions

KEEP THESE INSTRUCTIONS CAREFULLY AND



PASS THEM ON TO YOUR SUCCESSOR IN THE
EVENT OF A CHANGE IN OWNERSHIP, IN THE EVENT
OF MAINTENANCE AND POSSIBLE REPAIR WORK THEY
SHOULD BE PASSED TO THE QUALIFIED INSTALLER FOR
HIS OR HER REFERENCE.

7.1 Mounting the unit

UNIT MUST BE INSTALLED WITH THE PLUMBING

!



CONNECTIONS POINTING DOWNWARD OR
UPWARD ONLY.

WARNING: DO NOT INSTALL UNIT WHERE IT



WOULD ROUTINELY BE SPLASHED WITH WATER.

ELECTRIC SHOCK OR DEATH MAY RESULT.

» 1. Install Mini as close as possible to the hot water

draw-off point, for example, directly underneath the
sink or next to the shower stall.

» 2. Install Mini in a frost free area. If frost may occur,

remove unit before freezing temperatures set in.

» 3. Leave a minimum of 5" of clearance on all sides

for servicing.

» 4. Remove plastic cover by removing screws located

on the left and right sides of the unit

» 5. Remove plastic backplate by pulling on the tab

with a screwdriver

» 6. Mount backplate securely to wall by putting two

screws through mounting holes

» 7. Snap unit back onto mounting plate
» 8. Reinstall cover with screws on left and right side

of unit

.

B

.

B

A B

.

B

.

.

B

» 1. All plumbing work must comply with national and

applicable state and local
plumbing codes.

» 2. A pressure reducing valve must be installed if the

cold water supply pressure exceeds 150 PSI (10 bar).

» 3. Make certain that the cold water supply line has

been fl ushed to remove any scale and dirt.

» 4. Install isolating valve in cold water line as shown

in illustration
for maintenance purposes.

» 5. Cold water connection (inlet) is on the right side of

the unit, hot water connection (outlet) is on the left
side of unit.

» 6. Tankless water heaters such as the Mini are

not required to be equipped with a Pressure and
Temperature Relief Valve (except in Massachusetts).
If the local inspector will not pass the installation
without a P+T valve, it should be installed on the hot
water outlet side of unit.

» 7. The Mini is designed for connection to a braided

stainless steel hose with a 3/8“ OD Tube Outlet.

» 8. When all plumbing work is completed, check for

leaks and take corrective action before proceeding.

. This allows the unit to be isolated

C

7.3 Electrical connection

WARNING: BEFORE BEGINNING ANY WORK ON



THE ELECTRIC INSTALLATION, BE SURE THAT
THE MAIN CIRCUIT BREAKER PANEL SWITCH IS "OFF"
TO AVOID ANY DANGER OF ELECTRIC SHOCK. FAILURE
TO DO SO MAY RESULT IN SERIOUS INJURY OR DEATH.
ALL MOUNTING AND PLUMBING MUST BE COMPLETED
BEFORE PROCEEDING WITH ELECTRICAL HOOK-UP.
WHERE REQUIRED BY LOCAL, STATE OR NATIONAL
ELECTRICAL CODES, THE CIRCUIT SHOULD BE EQUIPPED
WITH A GROUND FAULT INTERRUPTER.

ENGLISH

7.2 Plumbing connections

NOTE: IF SOLDERING NEAR THE UNIT IS
NECESSARY, PLEASE DIRECT THE FLAME AWAY



FROM THE HOUSING OF THE UNIT IN ORDER TO AVOID
DAMAGE. EXCESSIVE HEAT FROM SOLDERING ON COP
PER PIPES NEAR THE MINI MAY CAUSE DAMAGE.

ALL PLUMBING WORK MUST COMPLY WITH NATION­AL AND APPLICABLE STATE AND LOCAL PLUMBING
CODES.

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WARNING: AS WITH ANY ELECTRIC APPLIANCE,
FAILURE TO ELECTRICALLY GROUND UNIT MAY
RESULT IN SERIOUS INJURY OR DEATH.

CAUTION: INSTALLING A MINI 2, MINI 2.5, MINI
3, OR MINI 3.5 ON A 208 V OR 220 - 240 V CIRCUIT
WILL DESTROY THE HEATING ELEMENT. THIS IS
CONSIDERED IMPROPER INSTALLATION AND WILL
VOID YOUR FACTORY WARRANTY.

INSTALLATION

electronic

°C

INITIAL START-UP

7.3 Electrical connection (cont.)

Voltage

Mini 2: 115 - 125 V
Mini 2.5: 115 - 125 V
Mini 3: 115 - 125 V
Mini 3.5: 115 - 125 V
Mini 4: 208, 220 - 240 V
Mini 6: 208, 220 - 240 V

1. All electrical work must comply with national and
applicable state and local electrical codes.

2. The Mini should be connected to a properly grounded
dedicated branch circuit of proper voltage rating. In
installa tions with several Mini units, each unit requires
an independent circuit. Please refer to the technical data
table for the correct wire and circuit breaker size.

3. The open ends of the "pigtail" must be feed into an
electrical junction box. Then feed wires through strain
relief clamp and tighten clamp down on wire.

4. Reinstall plastic cover.

8. Initial start-up

WARNING: OPEN HOT WATER FAUCET FOR A FEW

!



MINUTES UNTIL WATER FLOW IS CONTINUOUS
AND ALL AIR IS PURGED FROM WATER PIPES. THE
UNIT’S PLASTIC COVER MUST BE INSTALLED BEFORE
THE CIRCUIT BREAKER IS TURNED ON.

9. Water heater hand over

Explain the functions of the unit to the user and familiarize
him or her with its use.

Important instructions:

» Draw the user’s attention to possible hazards

(scalding).

» Hand over these instructions for future reference.
» In order to obtain a proper temperature at a single

spout mixer-type faucet, restrict cold water fl ow to
faucet by partially closing the cold water shut-off
valve under the sink until cold water and hot water
fl ow rates are approximately the same.

10. Normal maintenance

CAUTION: OTHER THAN THE FILTER SCREEN, THE

!



Mini DOES NOT CONTAIN ANY PARTS SERVICEABLE
BY THE LAY PERSON. IN CASE OF MALFUNCTION PLEASE
CONTACT A LICENSED PLUMBER OR ELECTRICIAN.

Stiebel Eltron Mini tankless heaters are designed for a
very long service life. Actual life expectancy will vary with
water quality and use. The unit itself does not require any
regular maintenance. However, to ensure consistent water
fl ow, it is recommended to periodically remove scale and
dirt that may build up at the aerator of the faucet or in the
shower head. Also, the Mini has a built in fi lter screen that
should be cleaned from time to time. In order to do this,
turn off the cold water supply at the isolating valve. Clean
screen and put the screen back into its original position.

1

on

2

on

10 | MINI™ SERIES TANKLESS ELECTRIC WATER HEATERS WWW.STIEBEL-ELTRON-USA.COM

26_02_02_0436

INSTALLATION

TECHNICAL DATA

11. Technical data

Model Mini

2*

Mini 2.5 Mini 3Mini

3.5 Mini 4Mini

6

Item number 231045 232098 220816 232099 222039 220817
Phase 1 1 1 1 1 1
Voltage V 115 - 125 115 - 125 115 - 125 115 - 125 208 240 208 240
Wattage kW 1.8 2.4 3.0 3.5 2.9 3.5 4.7 5.7
Max. amp, load A 16 21 25 31 13.8 15.2 22.4 24.7
Min. required
circuit breaker size

A 20 30 30 40 20 20 30 30
Required wire size AWG COPPER 12 10 10 10 12 12 10 10
Min. water flow to
activate unit

≥ GPM

(

≥ l/min)

0.21

(0.8)

0.40

(1.5)

0.40

(1.5)

0.40

(1.5)

0.40

(1.5)

0.77

(2.9)
Recommended
inlet temp. range

°F (°C) 41-77 (5-25)
Nominal water
volume

GAL (l) 0.026 (0.1)
Working pressure,
max.

PSI (bar) 150 (10)
Tested to pressure PSI (bar) 300 (20)
Weight lbs. (kg) 3.44 (1.56)

ENGLISH

Dimensions

1

Height
Depth
Width

inch (mm)
inch (mm)
inch (mm)

6

7

3

/

1

/

(165)

2

1

/

(82)

4

(190)

2

Water connections for 3/8“ O.D. flex connector
Heating System Nichrome bare-wire

* Note: Mini 2 is internally restricted to 0.32 GPM

-Tankless water heaters are considered a non-continuous load

-Conductors should be sized to maintain a voltage drop of less than 3 % under load

-For use with cold water supply only

12. Troubleshooting

E

Symptom Possible cause Solution

No hot water
despite fully
opened hot
water faucet.

No electrical power. Check the circuit breaker and

check voltage at the wiring block.

The activation fl ow rate needed to
turn on the heating element has not
been reached.

Safety cut out tripped – turn circuit breakers off

Clean fi lter screen.

– open Hot Valve to release pres-

sure from the unit
– reset saftey pressure cut out
– turn circuit breakers on

E

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WARRANTY | ENVIRONMENT AND RECYCLING

13. Spare parts

No. Model

Spare part

1 Front cover 271010
2 Rear housing 271011
3 Filter screen 272884
4 Plumbing connection 272777
5 O-rings 083043

Mini 2
Mini 2.5
Mini 3
Mini 3.5
Mini 4
Mini 6

1

2

4

3

14. Warranty

Residential & commercial warranty: Stiebel Eltron, Inc. warrants to the original owner that the Mini tankless electric
water heater will be free from defects in workmanship and materials for a period of three (3) years from the date of
purchase, and free from leak age for a period of seven (7) years from the date of purchase. Should the part(s) prove to
be defective under normal use during this period, Stiebel Eltron, Inc. will be responsible for replacement of the defective
part(s) only. Stiebel Eltron, Inc. is not responsible for labor charges to remove and/or replace the defective part(s), or
any incidential or consequential expenses.
Should the owner wish to return the tankless electric water heater for repair, the owner must fi rst secure written
authorization from Stiebel Eltron, Inc. The owner shall be required to show proof of purchase date, and to pay all trans­portation costs to return the defective part(s) or tankless electric water heater for repair or replacement. Warranty is
void if water heater has been installed or used improperly or if design has been altered in any way.

The installation, electrical connection and first operati-

!

on of this appliance should be carried out by a qualified

installer.

The company does not accept liability for failure of any

!

goods supplied which have not been installed and ope-

rated in accordance with the manufacturer‘s instructions.

Environment and recycling

Please help us to protect the environment by disposing of the
packaging in accordance with the national regulations for waste
processing.

12 | MINI™ SERIES TANKLESS ELECTRIC WATER HEATERS WWW.STIEBEL-ELTRON-USA.COM

STIEBEL ELTRON, INC.

17 West Street
West Hatfi eld, MA 01088, USA

PHONE: [phone] or 413-247-3380
FAX: [phone]
E-Mail [e-mail]
www.stiebel-eltron-usa.com

270578-36287-8650