Stiebel eltron Tempra 12 b User manual

™

C26_02_02_0875

Tempra®12, Tempra®15, Tempra®20, Tempra®24

Tempra®12 Plus, Tempra®15 Plus, Tempra®20 Plus,

Tempra®24 Plus, Tempra®29 Plus, Tempra®36 Plus

English

TANKLESS ELECTRIC WATER HEATERS

INSTALLATION INSTRUCTIONS FOR THE LICENSED PLUMBER AND ELECTRICIAN

Español

CALENTADORES DE AGUA SIN TANQUE

INSTRUCCIONES PARA LA INSTALACIÓN POR UN PLOMERO Y ELECTRICISTA AUTO-

RIZADO

Français

CHAUFFE-EAU INSTANTANÉS ÉLECTRIQUES

INSTRUCTIONS DE MONTAGE POUR PLOMBIERS ET ÉLECTRICIENS AGRÉÉSN

TEMPRA 12 - 24

TEMPRA 12 - 36 Plus

Français Sommaire

Tableau indiquant montée en température1

au-dessus de la température d’eau ambiante_ 18

Généralités2 ____________________________________________ 22

Montage de l‘appareil3 _______________________________ 22

Raccords d‘eau4 _______________________________________ 22

Raccordement électrique5 ___________________________ 23

Premiers réglages6 ___________________________________ 23

Mise en service du chauffe-eau7 ___________________ 23

Entretien de routine8 _________________________________ 23

Caractéristiques9 techniques _______________________ 23

Dépannage10 ____________________________________________ 24

Pièces de rechange11 __________________________________ 24

Garantie12 ________________________________________________ 28

English Table of contents

Table showing temperature increase above1

ambient water temperature _________________________2

General2 ___________________________________________________6

Mounting the unit3 ______________________________________6

Water connections4 _____________________________________6

Electrical connection5 __________________________________7

Initial settings6 ___________________________________________7

Putting the water heater into operation7 __________7

Normal maintenance8 __________________________________7

Technical Data9 __________________________________________7

Troubleshooting10 ________________________________________8

Spare parts11 ______________________________________________8

Warranty12 _______________________________________________ 28

Español Índice de materias

Aumento máximo de temperatura del1

agua fría entrante____________________________________ 10

Generalidades2 ________________________________________ 14

Montaje de la unidad3 ________________________________ 14

Conexiones de agua4 _________________________________ 14

Conexión eléctrica5 ___________________________________ 15

Ajustes iniciales6 ______________________________________ 15

Puesta en servicio del calentador de agua7 _____ 15

Mantenimiento normal8 _____________________________ 15

Datos técnicos9 _________________________________________ 15

Solución de problemas10 _____________________________ 16

Repuestos11 ______________________________________________ 16

Garantía12 _______________________________________________ 28

– 2 –

Table showing temperature increase above ambient water temperature1

Maximum temperature increase above ambient water temperature

English

Warm water ﬂow rate GPM l/min

Warm water outlet temperature

140 °F 60 °C

TEMPRA 12 / 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 / 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 / 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 / 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 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 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

Cold water inlet temperature °F °C

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

Warm water outlet temperature

113 °F 45 °C

TEMPRA 12 / 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 / 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 / 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 / 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 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 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

Cold water inlet temperature °F °C

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

Warm water outlet temperature 105 °F 40 °C

TEMPRA 12 / 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 / 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 / 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 / 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 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 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

Cold water inlet temperature °F °C

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

– 3 –– 1 –

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TEMPRA 12 - 24

C26_02_02_0875

TEMPRA 12 - 36 Plus

TEMPRA/TEMPRA 12 Plus

TEMPRA 29, 36 Plus

TEMPRA/TEMPRA 15, 20, 24 Plus

2.1

C26_02_02_0874C26_02_02_0873 C26_02_02_0873

C26_02_02_0873

English

– 4 –– 2 –

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14 15

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C26_02_02_0877

26_02_02_0876

C26_02_02_0872

C26_02_02_0878

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C26_02_02_0940

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– 5 –– 3 –

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TEMPRA 12

TEMPRA 12 Plus

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8794.02

8794.02 C26_02_02_0881

C26_02_02_0881

TEMPRA 15, 20, 24

TEMPRA 15, 20, 24 Plus

TEMPRA 29, 36 Plus

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26_02_02_0889

CKT 1 CKT 2 CKT 3 CKT 1 CKT 2 CKT 1

English

– 6 –

Legend to ﬁgures

1Temperature adjustment knob

2 Temperature scale

2.1 Temperature display

3"Power" light

4Knock-outs for wires

5 Safety thermal cut out

6 Outlet temperature sensor

7Wiring block

8Electronic control unit

9Heating 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

General2

The TEMPRA 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 TEMPRAS tankless water heater does

not store hot water. Instead, water is heated

instantaneously as it ﬂows through the unit.

The TEMPRAS 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 TEMPRAS 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 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).

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.

Recommended is a setting of

108 °F (42 °C) to 116 °F (47 °C).

The outlet temperature of the TEMPRA Plus

can be limited to 109°F (43 °C).

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 TEMPRAS, 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 info@stiebel-eltron-

usa.com or fax us at USA 413-247-3369.

The TEMPRA can be used for the following

applications.

GTypical residential installation

GTypical commercial installation

Mounting the unit3

!UNIT MUST BE INSTALLED IN A VER-

TICAL POSITION WITH THE WATER

FITTINGS POINTING DOWNWARD. DO NOT

INSTALL UNIT WHERE IT WOULD ROUTINELY

BE SPLASHED WITH WATER. ELECTRIC SHOCK

MAY RESULT.

1. Install TEMPRA as close as possible to the

main hot water draw-off 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 through mounting holes

E- .

Screws and plastic wall anchors for

mounting on masonry or wood are

provided.

Water connections4

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.

4. D Also, the TEMPRAS has built in ﬁlter

screen that should be cleaned from time

to time. Clean screen and put the screen

and the washer back into their original

position.

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. 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 inspectorwill not pass the

installation without a P&T, it should be in-

stalled on the hot water outlet side of

the unit.

7. The TEMPRA is designed for connection

to copper tubing, PEX tubing or a braided

stainless steel hose with a 3/4" NPT female

tapered thread. 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.

NOTE: 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.

NOTE: EXCESSIVE HEAT FROM SOLDERING ON

COPPER PIPES NEAR THE TEMPRA MAY CAUSE

DAMAGE.

– 7 –

English

Technical Data9

Model TEMPRA 12 TEMPRA 15 TEMPRA 20 TEMPRA 24

TEMPRA 12 Plus TEMPRA 15 Plus TEMPRA 20 Plus TEMPRA 24 Plus TEMPRA 29 Plus TEMPRA 36 Plus

Phase 1 1 1 1 1 1

Voltage V208 240 208 240 208 240 208 240 208 240 208 240

Wattage kW 912 10.8 14.4 14.4 19.2 18 24 21.6 28.8 27 36

Max. amp, load A44 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 brea-

ker size

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

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

Max. Inlet temperature °F (°C) 131 (55)

Min. water flow to activate

unit

GPM (l/min) 0.26 (1.4) 0.53 (2.2) 0.53 (2.2) 0.53 (2.2) 0.79 (3.3) 0.79 (3.3)

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)

Max. working pressure PSI (bar) 150 (10)

Tested to pressure PSI (bar) 300 (20)

Weight lbs. (kg) 13.2 (6.1) 15.4 (7.3) 15.4 (7.3) 15.4 (7.3) 17.6 (8.6) 17.6 (8.6)

Dimensions

height

depth

width

inch (mm)

14 1/2 (369)

4 5/8 (117)

16 5/8 (420)

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

Electrical connection5

!WARNING: BEFORE BEGINNING ANY

WORK ON THE ELECTRIC INSTALLA-

TION, BE SURE THAT MAIN BREAKER PANEL

SWITCHES ARE "OFF" TO AVOID ANY DANGER

OF ELECTRIC SHOCK. ALL MOUNTING AND

PLUMBING MUST BE COMPLETED BEFORE PRO-

CEEDING WITH ELECTRICAL HOOK-UP. WHERE

REQUIRED BY LOCAL, STATE OR NATIONAL

ELECTRICAL CODES THE CIRCUITS SHOULD BE

EQUIPPED WITH A "GROUND FAULT INTER-

RUPTER".

1. All electrical work must comply with national

and applicable state and local electrical codes.

2. HThe TEMPRA should be connected to

properly grounded dedicated branch circuits

of proper voltage rating. Ground must

be brought to the "Ground" at the circuit

breaker panel.

TEMPRA/TEMPRA 12 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/TEMPRA 15, 20 or 24 Plus: These

units require two independant circuits. Use

two supply cables protected by two separate

double pole breakers (see



TEMPRA 29 or 36 Plus These 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.

15 (380)

26_02_02_0893

4. The wire must be fed through the knock-

outs located between the hot and cold

water connections A , H



. The "live"

wires must 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 I ).

!WARNING: AS WITH ANY ELECTRIC

APPLIANCE, FAILURE TO ELECTRICALLY

GROUND UNIT MAY RESULT IN SERIOUS INJU-

RY OR DEATH.

Initial settings6



Selection of °F or °C units

– Set jumper on the dial-printed circuit board

to °F or °C.



Temperature limiter

The TEMPRA PLUS output temperature can be

limited to 109°F (43°C) by setting the jumper to

position Tred (reduced temperature)

Putting the water7 heater into operation

!WARNING: OPEN HOT WATER FAUCET

FOR A FEW MINUTES UNTIL WATER

FLOW IS CONTINUOUS AND ALL AIR IS PUR-

GED 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.

Normal maintenance8

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) or in the shower head.

!THE TEMPRAS DO NOT CONTAIN ANY

PARTS SERVICEABLE BY THE LAY

PERSON. IN CASE OF MALFUNCTION PLEASE

CONTACT A LICENSED PLUMBER OR ELECTRI-

CIAN.

– 8 –

Spare parts11

Model No. Spare part

1234567

Safety thermal

cut out

Flow sensor Electronic control

unit

Housing Electronic setpoint

selector

Motor-operated

valve

Heating system

TEMPRA 12 286369 286461 286366 286356 286359 --- 286360

TEMPRA 15 286369 286461 286365 286356 286359 --- 286361

TEMPRA 20 286369 286461 286844 286356 286359 --- 286362

TEMPRA 24 286369 286461 286367 286356 286359 --- 286364

TEMPRA 12 Plus 286369 286461 286375 286370 286372 220502 286360

TEMPRA 15 Plus 286369 286461 286377 286370 286372 220502 286361

TEMPRA 20 Plus 286369 286461 286845 286370 286372 220502 286362

TEMPRA 24 Plus 286369 286461 286376 286370 286372 220502 286364

TEMPRA 29 Plus 286369 286461 286378 286370 286372 220502 286373

TEMPRA 36 Plus 286369 286461 286379 286370 286372 220502 286374

Troubleshooting10

Symptom Possible cause Solution

No hot water

– 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

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

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.

26_02_02_0977

– 9 –

English

– 10 –

Flujo de agua caliente GPM l/min

Temperatura del agua caliente