STIEBEL ELTRON TEMPRA 12 B User Manual [en, es, fr]

OPERATION AND INSTALLATION
OPERACIÓN E INSTALACIÓN
UTILISATION ET INSTALLATION

TANKLESS ELECTRIC WATER HEATERS | CALENTADORES DE AGUA SIN TANQUE | CHAUFFE-EAU
INSTANTANÉS ÉLECTRIQUES

» TEMPRA® 12 B
» TEMPRA® 15 B

Tankless Electric Water Heater

» TEMPRA® 20 B
» TEMPRA® 24 B
» TEMPRA® 29 B
» TEMPRA® 36 B
» TEMPRA® 12 PLUS
»TEMPRA® 15 PLUS
»TEMPRA® 20 PLUS
» TEMPRA® 24 PLUS
» TEMPRA® 29 PLUS
» TEMPRA® 36 PLUS

with electronic temperature control

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Blinking: maximum power,
less than set point temp.

Steady: unit operating

Off: unit off

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The TEMPRA series is
tested and certified by WQA
against NSF/ANSI 372 for
“lead free“ compliance.

Tankless Electric Water Heater

with electronic temperature control

Power

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On: unit operating

Off: unit off

Made in Germany

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ENGLISH TABLE OF CONTENTS

1. General Information _____________________________________________2
S1 Safety Precautions _______________________________________________2

2. Table showing temperature increase above ambient water
temperature_______________________________________________________3

3. General ____________________________________________________________7

4. Mounting the unit ________________________________________________7

5. Water connections _______________________________________________8

6. Electrical connection _____________________________________________8

7. Initial settings ____________________________________________________9

8. Putting the water heater into operation _______________________9

9. Normal maintenance _____________________________________________9

10. Technical Data ____________________________________________________9

11. Troubleshooting ________________________________________________ 10

12. Spare parts _____________________________________________________ 10

13. Warranty ________________________________________________________ 11

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 800­582-8423 (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.

THIS IS THE SA FET Y 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.

S1 Safety Precautions

PLEASE READ AND FOLLOW THESE INSTRUCTIONS.

!

FAILURE TO FOLLOW THESE INSTRUCTIONS COULD
RESULT IN SERIOIUS 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.

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.

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

– 2 –

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.

2. Table showing temperature increase above ambient water temperature

Maximum temperature increase above ambient water temperaturetLegend to figures

Warm water flow rate

GPM l/min

Warm water outlet temperature

105 °F 40 °C

Cold water inlet temperature °F °C

39 59 77 95 113 131 4 15 25 35 45 55

TEMPRA 12 B / TEMPRA 12 Plus @ 208 V 9 kW 0,95 1,36 2,27 6,61 3,58 5,16 8,59 25,00
@ 220 - 240 V 12 kW 1,26 1,82 3,03 6,61 4,77 6,87 11,46 25,00

TEMPRA 15 B / TEMPRA 15 Plus @ 208 V 10,8 kW 1,14 1,63 2,72 6,61 4,30 6,19 10,31 25,00
@ 220 - 240 V 14.4 kW 1,51 2,18 3,63 6,61 5,73 8,25 13,75 25,00

TEMPRA 20 B / TEMPRA 20 Plus @ 208 V 14.4 kW 1,51 2,18 3,63 6,61 5,73 8,25 13,75 25,00
@ 220 - 240 V 19.2 kW 2,02 2,91 4,84 6,61 7,64 11,00 18,33 25,00

TEMPRA 24 B / TEMPRA 24 Plus @ 208 V 18 kW 1,89 2,72 4,54 6,61 7,16 10,31 17,18 25,00
@ 220 - 240 V 24 kW 2,52 3,63 6,05 6,61 9,55 13,75 22,91 25,00

TEMPRA 29 B / TEMPRA 29 Plus @ 208 V 21.6 kW 2,27 3,27 5,45 6,61 8,59 12,37 20,62 25,00
@ 220 - 240 V 28.8 kW 3,03 4,36 6,61 6,61 11,46 16,50 25,00 25,00

TEMPRA 36 B / TEMPRA 36 Plus @ 208 V 27 kW 2,84 4,09 6,61 6,61 10,74 15,47 25,00 25,00
@ 220 - 240 V 36 kW 3,78 5,45 6,61 6,61 14,32 20,62 25,00 25,00

English

Warm water outlet temperature

Cold water inlet temperature °F °C

39 59 77 95 113 131 4 15 25 35 45 55

TEMPRA 12 B / TEMPRA 12 Plus @ 208 V 9 kW 0,83 1,14 1,70 3,41 6,61 3,14 4,30 6,44 12,89 25,00
@ 220 - 240 V 12 kW 1,11 1,51 2,27 4,54 6,61 4,19 5,73 8,59 17,18 25,00

TEMPRA 15 B / TEMPRA 15 Plus @ 208 V 10,8 kW 1,00 1,36 2,04 4,09 6,61 3,77 5,16 7,73 15,47 25,00
@ 220 - 240 V 14.4 kW 1,33 1,82 2,72 5,45 6,61 5,03 6,87 10,31 20,62 25,00

TEMPRA 20 B / TEMPRA 20 Plus @ 208 V 14.4 kW 1,33 1,82 2,72 5,45 6,61 5,03 6,87 10,31 20,62 25,00
@ 220 - 240 V 19.2 kW 1,77 2,42 3,63 6,61 6,61 6,71 9,16 13,75 25,00 25,00

TEMPRA 24 B / TEMPRA 24 Plus @ 208 V 18 kW 1,66 2,27 3,41 6,61 6,61 6,29 8,59 12,89 25,00 25,00
@ 220 - 240 V 24 kW 2,21 3,03 4,54 6,61 6,61 8,38 11,46 17,18 25,00 25,00

TEMPRA 29 B / TEMPRA 29 Plus @ 208 V 21.6 kW 1,99 2,72 4,09 6,61 6,61 7,54 10,31 15,47 25,00 25,00
@ 220 - 240 V 28.8 kW 2,66 3,63 5,45 6,61 6,61 10,06 13,75 20,62 25,00 25,00

TEMPRA 36 B / TEMPRA 36 Plus @ 208 V 27 kW 2,49 3,41 5,11 6,61 6,61 9,43 12,89 19,33 25,00 25,00
@ 220 - 240 V 36 kW 3,32 4,54 6,61 6,61 6,61 12,57 17,18 25,00 25,00 25,00

Warm water outlet temperature

Cold water inlet temperature °F °C

39 59 77 95 113 131 4 15 25 35 45 55

TEMPRA 12 B / TEMPRA 12 Plus @ 208 V 9 kW 0.61 0.76 0.97 1.36 2.27 6.61 2.30 2.86 3.68 5.16 8.59 25.00
@ 220 - 240 V 12 kW 0.81 1.01 1.30 1.82 3.03 6.61 3.07 3.82 4.91 6.87 11.46 25.00

TEMPRA 15 B / TEMPRA 15 Plus @ 208 V 10,8 kW 0.73 0.91 1.17 1.63 2.72 6.61 2.76 3.44 4.42 6.19 10.31 25.00
@ 220 - 240 V 14.4 kW 0.97 1.21 1.56 2.18 3.63 6.61 3.68 4.58 5.89 8.25 13.75 25.00

TEMPRA 20 B / TEMPRA 20 Plus @ 208 V 14.4 kW 0.97 1.21 1.56 2.18 3.63 6.61 3.68 4.58 5.89 8.25 13.75 25.00
@ 220 - 240 V 19.2 kW 1.30 1.61 2.08 2.91 4.84 6.61 4.91 6.11 7.86 11.00 18.33 25.00

TEMPRA 24 B / TEMPRA 24 Plus @ 208 V 18 kW 1.22 1.51 1.95 2.72 4.54 6.61 4.60 5.73 7.36 10.31 17.18 25.00
@ 220 - 240 V 24 kW 1.62 2.02 2.59 3.63 6.05 6.61 6.14 7.64 9.82 13.75 22.91 25.00

TEMPRA 29 B / TEMPRA 29 Plus @ 208 V 21.6 kW 1.46 1.82 2.33 3.27 5.45 6.61 5.52 6.87 8.84 12.37 20.62 25.00
@ 220 - 240 V 28.8 kW 1.95 2.42 3.11 4.36 6.61 6.61 7.36 9.16 11.78 16.50 25.00 25.00

TEMPRA 36 B / TEMPRA 36 Plus @ 208 V 27 kW 1.82 2.27 2.92 4.09 6.61 6.61 6.90 8.59 11.05 15.47 25.00 25.00
@ 220 - 240 V 36 kW 2.43 3.03 3.89 5.45 6.61 6.61 9.21 11.46 14.73 20.62 25.00 25.00

113 °F 45 °C

140 °F 60 °C

– 3 –

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TEMPRA 12 - 36 B

4

Tankless Electric Water Heater

with electronic temperature control

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°F °C

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3

Blinking: maximum power,
less than set point temp.

Steady: unit operating

Off: unit off

4 5/8 (117)

TEMPRA 12 - 36 Plus

(369)

2

/

1

14

Tankless Electric Water Heater

with electronic temperature control

3

Power

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On: unit operating

Off: unit off

2.1

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1

(17,5)

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11

B

6

9

Made in Germany

8 5/8 (220)2 9/16 (65)

5

16

/8 (420)4 (102)

26_02_02_0875

TEMPRA 29, 36 B

5

TEMPRA 29, 36 Plus

TEMPRA 15, 20, 24 B

TEMPRA 15, 20, 24 Plus

26_02_02_0874

7

8

10

TEMPRA 12 B / TEMPRA 12 Plus

11

– 4 –

12

26_02_02_0873

26_02_02_0873 26_02_02_0873

13

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English

1

2

26_02_02_0876

26_02_02_0877

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1

F

2

2

3

26_02_02_0872

1514

1

26_02_02_0940

1

2

16

17

1514

16

17

26_02_02_0878

– 5 –

H

TEMPRA 29, 36 B
TEMPRA 29, 36 Plus

1

TEMPRA 15, 20, 24 B
TEMPRA 15, 20, 24 Plus

TEMPRA 12 B
TEMPRA 12 Plus

2

TEMPRA 36 B

I

TEMPRA 36 Plus

642

531

CKT 1

642

531

26_02_02_0881

CKT 3 CKT 1 CKT 2 CKT 1

CKT 2

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

OFF

OFF

OFF

OFF

26_02_02_0568

26_02_02_0881

ON

ON

ON

ON

26_02_02_0568

TEMPRA 29 B
TEMPRA 29 Plus

642

531

6
11/1 2
5
4
9/10
3
2
7/8
1
13

CKT 1

14 15

CKT 2

1

CKT 3

4

42

51

42

51

6

2

5

3

42

51

6
11/1 2
5
4
9/10
3
2
7/8
1
13

CKT 1

14 15

CKT 2

1

CKT 3

4

26_02_02_0881

ON

OFF

ON

OFF

26_02_02_0568

2

5

TEMPRA 24 B
TEMPRA 24 Plus

642

531

642

531

TEMPRA 15/20 B
TEMPRA 15/20 Plus

42

CKT 1

CKT 2

6
11/1 2
5
4
9/10
3
2
7/8
1

14 15 14 15 14 15

13

4

6

2

1

5

3

51

42

51

6
11/1 2
5
4
9/10
3
2
7/8
1
13

CKT 1

CKT 2

4

1

5

TEMPRA 12 B
TEMPRA 12 Plus

642

531

2

– 6 –

6
11/1 2
5
4
9/10
3
2
7/8
1
13

CKT 1

4

6

2

1

3

5

85_02_02_0001

THIS MANUAL MUST BE READ CAREFULLY BEFORE ATTEMPTING TO INSTALL THE TEMPRA 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 413-247-3380 AND WE WILL REFER YOU TO A QUALIFIED STIEBEL ELTRON SERVICE REPRESENTATIVE
IN YOUR AREA.

English

Legend to figures

1 Temperature adjustment knob
2 Temperature scale

2.1 Temperature display
3 "Power" light
4 Knock-outs for wires
5 Safety thermal cut out
6 Outlet temperature sensor
7 Wiring block
8 Electronic control unit
9 Heating system
10 Flow sensor
11 Motor-operated valve
12 Cold water connection
13 Hot water connection
14 Hot valve (left)
15 Cold valve (right)
16 Sink
17 Water supply line for faucet/tap installation

3. General

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.

The TEMPRA B and TEMPRA Plus units are designed to supply hot water
for a house, apartment or certain commercial applications. Unlike a
conventional storage type water heater the TEMPRA tankless water heater
does not store hot water. Instead, water is heated instantaneously as it
flows through the unit. The TEMPRA offers greater energy efficiency than
storage type water heaters due to the absence of stand-by losses and
reduced hot water pipe runs.

The input of heat into the water is controlled electronically. The TEMPRA
will deliver any water temperature between 86 °F (30 °C) and 140 °F (60 °C).
Please set the desired temperature using the knob on the front cover. The
TEMPRA Plus Temperature adjustment knob can be set to: OFF, 86...140 °F
(30...60 °C).

The TEMPRA B has a °F and a °C scale. The output temperature of the
TEMPRA Plus is shown in the digital display in °F or °C units. (°F or °C units
can be selected during installation, factory setting: °F). The maximum
temperature is electronically limited to 140 °F (60 °C).

For reasons of appliance efficiency and durability (scaling), the
optimum temperature setting lies between 86 °F (30 °C) and
120 °F (50 °C).

The outlet temperature of the TEMPRA Plus can be limited (see "Initial
settings").

TEMPRA B units:

In case the "Power” LED is flashing while the unit operates, the water
flow rate exceeds the heating capacity of the unit. Reduce the hot water
flow rate in order to let the unit achieve the set point temperature.

In case you have questions regarding the way you plan to use the TEMPRA
unit, 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 USA 413-247-3369.

The TEMPRA can be used for the following applications.

G

1 Typical residential installation

G

2 Typical commercial installation

4. Mounting the unit

NOTICE: UNIT MUST BE INSTALLED IN A VERTICAL

!

POSITION WITH THE WATER FITTINGS POINTING
DOWNWARD.

WARNING: DO NOT INSTALL UNIT WHERE IT WOULD
ROUTINELY BE SPLASHED WITH WATER. ELECTRIC SHOCK
MAY RESULT.

CAUTION: HOT WATER OUTLET PIPES LEAVING UNIT CAN
BE HOT TO THE TOUCH. INSULATION MUST BE USED FOR
HOT WATER PIPES BELOW 36" DUE TO BURN RISK TO
CHILDREN.

– 7 –

NOTICE: THIS UNIT SHOULD NOT BE INSTALLED IN A

!

LOCATION WHERE IT MAY BE EXPOSED TO FREEZING
TEMPERATURES (LESS THAN 36 °F). IF THE UNIT MAY
BE SUBJECT TO FREEZING TEMPERATURES ALL WATER
MUST BE DRAINED FROM THE UNIT. FAILURE TO COMPLY
WITH THIS INSTRUCTION VOIDS ALL WARRANTIES.

THE UNIT SHOULD BE LOCATED IN AN AREA WHERE
WATER LEAKAGE FROM THE UNIT OR CONNECTIONS
WILL NOT RESULT IN DAMAGE TO THE AREA ADJACENT
TO THE UNIT. IF SUCH A LOCATION CANNOT BE AVOIDED
IT IT RECOMMENDED THAT A DRAIN PAN BE INSTALLED
UNDER THE UNIT.

7. The TEMPRA on the hot side is designed for connection to copper
tubing, PEX tubing or a braided stainless steel hose with a
3/4" NPT female tapered thread.
The plumbing on the cold water inlet side needs to be such that
it can easily be removed to allow access to the inlet filter screen.
The easiest way to achieve this is to us a stainless steel
braided hose connector.
If soldering near the unit is necessary, please direct the flame
away from the housing of the unit in order to avoid damage.

8. When all plumbing work is completed, check for leaks and take
corrective action before proceeding.

1. Install TEMPRA as close as possible to the main hot water draw­off points.

2. Install TEMPRA in a frost free area. If frost might occur, remove
unit before freezing temperatures set in.

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

4. Remove the cover screw with chopper disc and open the cover

C

.

5. Mount unit securely to wall by putting at least three screws

E

through mounting holes
Screws and plastic wall anchors for mounting on masonry or
wood are provided.

1 - 3.

5. Water connections

NOTICE: EXCESSIVE HEAT FROM SOLDERING ON COPPER

!

PIPES NEAR THE TEMPRA MAY CAUSE DAMAGE.

THE COLD WATER CONNECTION TO THE UNIT MUST BE
DISCONNECTED PERIODICALLY IN ORDER TO CLEAN
THE FILTER SCREEN. IT IS REQUIRED TO USE WATER
CONNECTIONS THAT ARE EASILY DETACHABLE SUCH AS
BRAIDED STEEL FLEX CONNECTORS.

NOTICE: HARD WATER OR WATER WITH A HIGH MINERAL

!

COUNT MAY DAMAGE THE UNIT. DAMAGE TO THE UNIT
CAUSED BY SCALE OR A HIGH MINERAL COUNT IS NOT
COVERED UNDER THE WARRANTY.

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 flushed
to remove any scale and dirt.

D

Also, the TEMPRA unit has a built in filter screen 1 that

4.

should be cleaned from time to time. Clean screen and put the

2

screen and the washer

5. The cold water connection (inlet) is on the right side of the
unit, and the hot water connection (outlet) is on the left side
of the unit.

6.

NOTICE: TANKLESS WATER HEATERS SUCH AS THE

!

TEMPRA ARE NOT REQUIRED TO BE EQUIPPED WITH
A PRESSURE AND TEMPERATURE RELIEF VALVE
(P&T). IF THE LOCAL INSPECTOR WILL NOT PASS
THE INSTALLATION WITHOUT A P&T, IT SHOULD BE
INSTALLED ON THE HOT WATER OUTLET SIDE OF THE
UNIT.

back into their original position.

6. Electrical connection

WARNING: BEFORE BEGINNING ANY WORK ON THE

!

ELECTRIC INSTALLATION, BE SURE THAT MAIN BREAKER
PANEL SWITCHES ARE "OFF" TO AVOID ANY DANGER OF
ELECTRIC SHOCK. ALL MOUNTING AND PLUMBING MUST
BE COMPLETED BEFORE PROCEEDING WITH ELECTRICAL
HOOK-UP. WHERE REQUIRED BY LOCAL, STATE OR
NATIONAL ELECTRICAL CODES THE CIRCUITS SHOULD
BE EQUIPPED WITH A "GROUND FAULT INTERRUPTER".

THE UNIT MUST BE PROPERLY GROUNDED IN ACCORDANCE
WITH STATE AND LOCAL CODES, OR IN ABSENCE OF SUCH
CODES, IN ACCORDANCE WITH NATIONAL ELECTRIC
CODE OR THE CANADIAN ELECTRIC CODE. FAILURE TO
ELECTRICALLY GROUND THE PRODUCT COULD RESULT IN
SERIOUS PERSONAL INJURY OR DEATH.

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

H

The TEMPRA should be connected to properly grounded

2.

dedicated branch circuits of proper voltage rating. Ground must
be brought to the "Ground" at the circuit breaker panel.

TEMPRA 12 B/Plus: These units can be connected to a single circuit.
Use a supply cable protected by a double pole breaker (see
The TEMPRAS 15 to 36 must have multiple power sources.

TEMPRA 15, 20 or 24 B/Plus: These units require two independant
circuits. Use two supply cables protected by two separate double

).

2

I

) .

2

).

15 (380)

A

H

,

1. The "live" wires must

pole breakers (see

TEM PR A 29 o r 3 6 B/ Pl us T hese units require three independant circuits.
Use three supply cables protected by three separate double pole
breakers (see

Please refer to the technical data table for the correct wire and circuit
breaker size. In all cases, make sure that the unit is properly grounded.

3. Cut the electrical connection cable to length and strip.

4. The wire must be fed through the knock-outs located between the
hot and cold water connections
be connected to the slots on the terminal block marked L1 and L2.
The ground wire must be connected to slot marked with the ground
symbol (see

).

2

26_02_02_0893

– 8 –

7. Initial settings

Check whether the set value transducer cable is plugged into the

A1 (TEMPRA B) or T

slot T

Soll

F

1 Selection of °F or °C units

D (TEMPRA Plus) on the main PCB.

Soll

- Set jumper on the dial-printed circuit board to °F or °C.

F

2 Activate anti-scalding protection function

-

On the TEMPRA Plus, an anti-scalding protection function can be
activated by two different methods.

1. Limit the outlet temperature to the fixed temperature of 109°F
(43 °C).

- Insert the coding plug into position Tred (reduced temperature).

2. Select a specific outlet temperature

- Switch the appliance 'live'.

/ T

- Open the casing so that coding plug T

becomes accessible.

max

red

- Set the temperature selector to "OFF". The coding plug must be

set to T

- Set coding plug to T

(standard delivery).

max

; the setting mode will be activated and

red

the flashing display shows the current temperature limit.

- Within the next 30 seconds, you can select the required
temperature (display continues to flash). The setting mode will
terminate after 30 seconds; the programming unit will display
"OFF" again.

8. Putting the water heater into
operation

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 COVER
MUST BE INSTALLED BEFORE THE CIRCUIT BREAKERS ARE
TURNED ON.

1. Close the cover and fix it using the screw with chopper disc.

2. Turn on circuit breakers to bring electrical power to the unit.

3. Turn the temperature selector clockwise and anti-clockwise, to
calibrate the set value transducer.

4. Adjust the water temperature to the desired level using the knob
on the front cover of the unit.

5. Turn on hot water and wait twenty seconds until temperature
has stabilized.

6. Check the water temperature with your hand and make sure
that it does not feel too hot. Reduce if necessary.

7. Explain to the user how the unit works and familiarise him
or her with its use.
Advise the user about possible hazards (hot water temperature
up to 140 °F / 60 °C). Hand over these instructions, to be kept
for future reference.

9. Normal maintenance

NOTICE: THE TEMPRAS DO NOT CONTAIN ANY PARTS

!

SERVICEABLE BY THE LAY PERSON. IN CASE OF
MALFUNCTION PLEASE CONTACT A LICENSED PLUMBER
OR ELECTRICIAN.

STIEBEL ELTRON TEMPRA tankless water 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 flow, it is
recommended to periodically remove scale and dirt that may build
up at the aerator of the faucet(s), the filter screen in the unit, or
in the shower head.

English

10. Technical Data

Model `BTVŨĜŝ `BTVŨĜÑ `BTVŨŝƃ `BTVŨŝÔ `BTVŨŝĎ `BTVŨŗō
Mat. no. ŝŝŗÔŝƃ ŝŝŗÔŝĜ ŝŝŗÔŝŝ ŝŝŗÔŝÔ ŝŗŝÄÄÑ ŝŗŝÄÄō

Model `BTVŨĜŝŨTùşń `BTVŨĜÑŨTùşń `BTVŨŝƃŨTùşń `BTVŨŝÔŨTùşń `BTVŨŝĎŨTùşń `BTVŨŗōŨTùşń
Mat. no. ŝŝÔĜĎō ŝŝÔĜĎŌ ŝŝÔĜĎÄ ŝŝÔĜĎĎ ŝŝŗÔŝÑ ŝŝŗÔŝō

Phase 1 1 1 1 1 1
Voltage V 208 240 208 240 208 240 208 240 208 240 208 240
Wattage kW 9 12 10.8 14.4 14.4 19.2 18 24 21.6 28.8 27 36

Max. amp, load A 44 50 2 x 26 2 x 30 2 x 35 2 x 40 2 x 44 2 x 50 3 x 35 3 x 40 3 x 44 3 x 50
Min. required circuit
breaker size
Required wire size AWG COPPER 6 6 2 x 8 2 x 8 2 x 8 2 x 8 2 x 6 2 x 6 3 x 8 3 x 8 3 x 6 3 x 6

Inlet temperature, max. °F (°C) 131 (55)
Water flow to activate unit tGPM (tl/min) 0.37 (1.4) 0.50 (1.9) 0.50 (1.9) 0.50 (1.9) 0.77 (2.9) 0.77 (2.9)
Nominal water volume GAL (l) 0.13 (0.5) 0.26 (1.0) 0.26 (1.0) 0.26 (1.0) 0.39 (1.5) 0.39 (1.5)

Working pressure, max. PSI (bar) 145 (10)
Tested to pressure PSI (bar) 290 (20)
Weight lbs. (kg) 13.5 (6.1) 16.1 (7.3) 16.1 (7.3) 16.1 (7.3) 19.0 (8.6) 19.0 (8.6)
Dimensions
height
depth
width
Water connections NPT 3/4"

– Tankless water heaters are considered a non-continuous load – Conductors should be sized to maintain a voltage drop of less than 3 % under load

A 60 60 2 x 40 2 x 40 2 x 50 2 x 50 2 x 60 2 x 60 3 x 50 3 x 50 3 x 60 3 x 60

inch (mm)

14 1/2 (369)
4 5/8 (117)
16 5/8 (420)

– 9 –

11. Troubleshooting

Symptom TĒńńêù¼|şń¼ ZĒùşŒ êĒĉ

No hot water

Not enough hot water – filter screen clogged – clean filter screen at unit

– circuit breakers off
– safety thermal cut-out tripped
– not enough flow rate to activate unit

– turn circuit breakers on
– reset safety thermal cut-out
– clean filter screen at unit
– clean faucet aerator or shower head

Water not hot enough

– water flow rate too high

– voltage too low

– reduce water flow rate until power light on front
cover stops blinking
– supply correct voltage to unit

If you are not able to resolve a problem please contact us toll free at 800-582-8423 before removing the unit from the wall.
STIEBEL ELTRON is happy to provide technical assistance. In most instances, we can resolve the problem over the phone.

12. Spare parts

Model Spare part No.

J

TEMPRA 12 B 286356 254307 279998 286360 286369 286366 286461
TEMPRA 15 B 286356 254307 279997 286361 286369 286844 286461
TEMPRA 20 B 286356 254307 279997 286362 286369 286844 286461
TEMPRA 24 B 286356 254307 279997 286364 286369 286367 286461
TEMPRA 29 B 286356 254307 279996 286373 286369 296888 286461
TEMPRA 36 B 286356 254307 279996 286374 286369 296889 286461
TEMPRA 12 Plus 286370 254307 279998 286360 286369 286375 286461
TEMPRA 15 Plus 286370 254307 279997 286361 286369 286845 286461
TEMPRA 20 Plus 286370 254307 279997 286362 286369 286845 286461
TEMPRA 24 Plus 286370 254307 279997 286364 286369 286376 286461
TEMPRA 29 Plus 286370 254307 279996 286373 286369 286378 286461
TEMPRA 36 Plus 286370 254307 279996 286374 286369 286379 286461

Model Spare part No.

J

TEMPRA 12 B 278698 --- 286359 --- 280677 056755 280730
TEMPRA 15 B 278698 --- 286359 --- 280677 056755 280730
TEMPRA 20 B 278698 --- 286359 --- 280677 056755 280730
TEMPRA 24 B 278698 --- 286359 --- 280677 056755 280730
TEMPRA 29 B 278698 --- 286359 --- 280677 056755 280730
TEMPRA 36 B 278698 --- 286359 --- 280677 056755 280730
TEMPRA 12 Plus 278698 220502 286372 283455 280677 056755 280730
TEMPRA 15 Plus 278698 220502 286372 283455 280677 056755 280730
TEMPRA 20 Plus 278698 220502 286372 283455 280677 056755 280730
TEMPRA 24 Plus 278698 220502 286372 283455 280677 056755 280730
TEMPRA 29 Plus 278698 220502 286372 283455 280677 056755 280730
TEMPRA 36 Plus 278698 220502 286372 283455 280677 056755 280730

1 2 3 4 5 6 7
Housing

8 9 10 11 12 13 14
Plumbing
connection 3/4"

Temp. control
knob

Advanced Flow
Control

Wiring block Heating system Safety thermal

cut out

Electronic temp.
control

Jumpers Temperature

sensor

Electronic control
device

Filter screen Set point case

Flow sensor

Model Spare part No.

J

TEMPRA 12 B 278695 --- 254312
TEMPRA 15 B 278695 --- 254312
TEMPRA 20 B 278695 --- 254312
TEMPRA 24 B 278695 --- 254312
TEMPRA 29 B 278695 --- 254312
TEMPRA 36 B 278695 --- 254312
TEMPRA 12 Plus --- 280622 254312
TEMPRA 15 Plus --- 280622 254312
TEMPRA 20 Plus --- 280622 254312
TEMPRA 24 Plus --- 280622 254312
TEMPRA 29 Plus --- 280622 254312
TEMPRA 36 Plus --- 280622 254312

15 16 17
Inlet pipe elbow Valve assembly Axis connection

plug

– 10 –