STIEBEL ELTRON MINI 2-1 Instruction Manual

Operation and Installation
Funcionamiento e Instalación
Mode D’emploi et Installation
Tankless Electric Water Heater with Electromechanical Flow Switch
Calentador Eléctrico de Agua Sin Tanque con Sensor Electromecánico de Flujo
Chauffe-Eau Électrique Sans Réservoir avec Contacteur Debitmetrique Électromécanique
»Mini
™2-1
»Mini
™2.5-1
»Mini
™3-1
»Mini
™3.5-1
»Mini
™4-2
»Mini
™6-2
Conforms to ANSI/UL Std. 499
Certified to CAN/CSA Std. E335-1 & E335-2-35
Conforme a ANSI/UL Std. 499
Certificación con CAN/CSA Std. E335-1 & E335-2-35
Conforme à la norme ANSI/UL Std. 499
Certifié à la norme CAN/CSA Std. E335-1 & E335-2-35
Tested and certified by WQA to NSF/ANSI372
for lead free compliance.
Probado y certificado por WQA NSF/ANSI 372 para
el cumplimiento de las regulaciones sin plomo.
Testé et certifié par WQA à la NSF/ANSI 372 pour une
utilisation sans plomb.

2 | Mini™Series Electric Tankless Water Heaters www.stiebel-eltron-usa.com
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
qualified Stiebel Eltron service representative in your area.
1. General Information __________________________________________ 2
1.1 Symbol key___________________________________________________________ 3
2. Safety precautions____________________________________________ 4
3. Register your product ________________________________________ 5
4. Temperature increase above ambient water temperature 6
5. Technical drawings ___________________________________________ 7
6. Overview _____________________________________________________10
6.1 General Description _______________________________________________10
6.2 Important information before supplying power to unit____11
6.3 Hot water output using required aerators____________________12
6.4 Incorrect use________________________________________________________12
6.5 First steps to be taken in the event of malfunction _________12
6.6 Maintenance and care ____________________________________________13
7. Installation instructions _____________________________________13
7.1 Mounting the unit _________________________________________________13
7.2 Plumbing connections ____________________________________________14
7.3 Electrical connection______________________________________________15
8. Initial start-up _______________________________________________16
9. Water heater hand over _____________________________________16
10. Normal maintenance ________________________________________16
11. Technical data________________________________________________17
12. Troubleshooting______________________________________________19
13. Spare parts ___________________________________________________20
14. Warranty _____________________________________________________21

ENGLISH
www.stiebel-eltron-usa.com Mini™Series Electric Tankless Water Heaters | 3
GENERAL INFORMATION
!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.
1.1 Symbol key
1.1.1 Layout of safety information
DANGER: Electrocution
Before any work on the appliance,
disconnect all poles from the power
supply.
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
po
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
p
we
r
13
4
2
1 Symbol (see 1.1.2 “Symbols”, below)
2 Keyword (see 1.1.3 “Keywords”, below)
3 Description (see 1.1.2 “Symbols”, below)
4Informationtext
1.1.2 Symbols
Symbol Description
Injury
Electrocution
Burns or scalding
!Other situations

4 | Mini™Series Electric Tankless Water Heaters www.stiebel-eltron-usa.com
SAFETY PRECAUTIONS
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.
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.

ENGLISH
www.stiebel-eltron-usa.com Mini™Series Electric Tankless Water Heaters | 5
REGISTER YOUR PRODUCT
DANGER: Water temperatures over 125°F (52°C) can cause severe burns instantly or death from scalding.
A hot water scalding potential exists if the output from the
unit is too high. Households with small children, disabled or
elderly persons may require that a mixing valve be installed to
deliver water temperatures of 120°F (49°C) 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 3-1 (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.

6 | Mini™Series Electric Tankless Water Heaters www.stiebel-eltron-usa.com
TEMPERATURE INCREASE ABOVE AMBIENT WATER TEMPERATURE
4. Temperature increase above ambient water temperature
Temp. rise above incoming water temp. (°F) Temp. rise above incoming water temp. (°C)
GPM l/m
Unit Heating Capacity 0.32 0.42 0.48 0.53 0.69 0.85 1.06 1.14 1.2 1.6 1.8 2.0 2.6 3.2 4.0 4.3
Mini 2-1*1.8 kW @110–120 V 39 ------- 22 - - - - - - -
Mini 2.5-1 2.4 kW @110–120 V -39 34 33 24 --- -22 19 17 13 - - -
Mini 3-1 3.0 kW @110–120 V -49 43 41 30 --- -27 24 22 17 - - -
Mini 3.5-1 3.5 kW @110–120 V -57 50 45 35 --- -31 28 25 19 - - -
Mini 4-2 3.5 kW @220–240 V -57 50 45 35 --- -31 28 25 19 - - -
Mini 6-2 5.7 kW @220–240 V -----46 37 34 -----25.5 20.4 19.0
*Mini 2-1 is internally restricted to 0.32 gpm (1.2 l/min)

ENGLISH
www.stiebel-eltron-usa.com Mini™Series Electric Tankless Water Heaters | 7
TECHNICAL DRAWINGS
5. Technical drawings
A
5/
58
” (143 mm)
3
/
16
” (4,8 mm)
1/
316 ” (30 mm)
4¾” (120 mm)
7 ½ ” (190 mm)
3¾” (95mm)
1
2
4
31 Hot water connection
2 Cold water connection
3 Filter screen
4 Mounting holes
13/16 ” (20 mm)
6½” (165 mm)
3 ¼ ” (82 mm)
3/8” O.D.
flex connector
A

8| Mini™Series Electric Tankless Water Heaters www.stiebel-eltron-usa.com
TECHNICAL DRAWINGS
B
B
B
B

ENGLISH
www.stiebel-eltron-usa.com Mini™Series Electric Tankless Water Heaters | 9
TECHNICAL DRAWINGS
C
C
C26_02_05_0010
5
6
7
89
10
5 Electrical junction box
6 Water supply line
7 Sink
8 Cold valve (right)
9 Hot valve (left)
10
Shut off valve
D
D
V >
p>
LN
LNGND
Mini™2-1/2.5-1
3-1/3.5-1
L1 L2 GNDMini™4-2/6-2

10 | Mini™Series Electric Tankless Water Heaters www.stiebel-eltron-usa.com
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 wa-
ter. Failure to comply with the installation and operating instruc-
tions 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 manu-
als, 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 413.247.3380 and we will refer you to a qualified
Stiebel Eltron service representative in your area.
6. Overview
6.1 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 flows through the
unit. The powerful heating elements are activated by a flow
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 efficiency than storage type water heaters. The
unit will continuously supply hot water as long as the faucet is
open.
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 water flow 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 email us at
[e-mail] or fax us at 413.247.3369.