STIEBEL ELTRON Tempra 12 B User manual

26_02_02_0604
26_02_02_0605
TempraTM 12, TempraTM 15, TempraTM 20,
TempraTM 22, TempraTM 24, TempraTM 29, TempraTM 36
English
TANKLESS ELECTRIC WATER HEATERS
INSTALLATION INSTRUCTIONS FOR THE LICENSED
PLUMBER AND ELECTRICIAN
264655
English Table of contents
Table showing temperature increase above
ambient water temperature 2
General 6
Mounting the unit 6
Water connections 6
Electrical connections 7
Putting the water heater into operation 7
Normal maintenance 7
Technical Data 7
Troubleshooting 8
Spare parts 8
Warranty 9
Español Índice de materias
Aumento máximo de temperatura del agua
fría entrante 2
Características generales de la unidad 9
Colocación y montaje 10
Conexiones de agua 10
Conexión eléctrica 10
Arranque inicial 10
Mantenimiento rutinario 10
Datos técnicos 11
Identificación y resolución de problemas 11
Repuestos 11
Garantía 15
Français Sommaire
Tableau indiquant montée en température
au-dessus de la température d’eau ambiante 2
Généralités 9
Montage de l’appareil 9
Raccords d’eau 9
Connexions électriques 10
Mise en service du chauffe-eau 10
Entretien de routine 10
Caractéristiques techniques 11
Dépannage 11
Pièces de rechange 12
Garantie 16
TEMPRA 12, TEMPRA 15, TEMPRA 20, TEMPRA 24
TEMPRA 22, TEMPRA 29, TEMPRA 36

– 2 –
Maximum temperature increase above ambient water temperature
Aumento máximo de temperatura del agua fría entrante
Maximum temperature increase above ambient water temperature
English
Español
Français
inlet temperature  
temperatura de entrada
Température d‘entrée                    
flow rate
Flujo
Débit d‘eau
outlet temperature

Température de sortie
GPM
105 °F
l/min
40 °C
TEMPRA 12 208 V  0.95 1.14 1.36 1.70 2.27 3.58 4.30 5.16 6.44 8.59
240 V  1.26 1.51 1.82 2.27 3.03 4.77 5.73 6.87 8.59 11.46
TEMPRA 15 208 V  1,14 1,36 1,63 2,04 2,72 4,30 5,16 6,19 7,73 10,31
240 V  1,51 1,82 2,18 2,72 3,63 5,73 6,87 8,25 10,31 13,75
TEMPRA 20 208 V  1.51 1.82 2.18 2.72 3.63 5.73 6.87 8.25 10.31 13.75
 240 V  2.02 2.42 2.91 3.63 4.84 7.64 9.16 11.00 13.75 18.33
TEMPRA 22 208 V  1,70 2,04 2,45 3,06 4,09 6,44 7,73 9,28 11,60 15,47
 240 V  2.27 2.72 3.27 4.09 5.45 8.59 10.31 12.37 15.47 20.62
TEMPRA 24 208 V  1.89 2.27 2.72 3.41 4.54 7.16 8.59 10.31 12.89 17.18
 240 V  2.52 3.03 3.63 4.54 6.05 9.55 11.46 13.75 17.18 22.91
TEMPRA 29 208 V  2.27 2.72 3.27 4.09 5.45 8.59 10.31 12.37 15.47 20.62
240 V  3.03 3.63 4.36 5.45 7.26 11.46 13.75 16.50 20.62 27.49
TEMPRA 36 208 V  2.84 3.41 4.09 5.11 6.81 10.74 12.89 15.47 19.33 25.78
 240 V  3.78 4.54 5.45 6.81 14.32 17.18 20.62 25.78
outlet temperature

Température de sortie 113 °F 45 °C
TEMPRA 12 208 V  0.83 0.97 1.14 1.36 1.70 3.14 3.68 4.30 5.16 6.44
240 V  1.11 1.30 1.51 1.82 2.27 4.19 4.91 5.73 6.87 8.59
TEMPRA 15 208 V  1,00 1,17 1,36 1,63 2,04 3,77 4,42 5,16 6,19 7,73
240 V  1.33 1.56 1.82 2.18 2.72 5.03 5.89 6.87 8.25 10.31
TEMPRA 20 208 V  1.33 1.56 1.82 2.18 2.72 5.03 5.89 6.87 8.25 10.31
 240 V  1.77 2.08 2.42 2.91 3.63 6.71 7.86 9.16 11.00 13.75
TEMPRA 22 208 V  1,49 1,75 2,04 2,45 3,06 5,66 6,63 7,73 9,28 11,60
 240 V  1.99 2.33 2.72 3.27 4.09 7.54 8.84 10.31 12.37 15.47
TEMPRA 24 208 V  1.66 1.95 2.27 2.72 3.41 6.29 7.36 8.59 10.31 12.89
 240 V  2.21 2.59 3.03 3.63 4.54 8.38 9.82 11.46 13.75 17.18
TEMPRA 29 208 V  1.99 2.33 2.72 3.27 4.09 7.54 8.84 10.31 12.37 15.47
240 V  2.66 3.11 3.63 4.36 5.45 10.06 11.78 13.75 16.50 20.62
TEMPRA 36 208 V  2.49 2.92 3.41 4.09 5.11 9.43 11.05 12.89 15.47 19.33
 240 V  3.32 3.89 4.54 5.45 6.81 12.57 14.73 17.18 20.62 25.78
outlet temperature

Température de sortie 125.6 °F 52 °C
TEMPRA 12 208 V  0.71 0.81 0.92 1.06 1.26 2.69 3.07 3.48 4.03 4.77
240 V  0.95 1.08 1.23 1.42 1.68 3.58 4.09 4.64 5.37 6.36
TEMPRA 15 208 V  0,85 0,97 1,10 1,28 1,51 3,22 3,68 4,18 4,83 5,73
240 V  1.14 1.30 1.47 1.70 2.02 4.30 4.91 5.57 6.44 7.64
TEMPRA 20 208 V  1.14 1.30 1.47 1.70 2.02 4.30 4.91 5.57 6.44 7.64
 240 V  1.51 1.73 1.96 2.27 2.69 5.73 6.55 7.43 8.59 10.18
TEMPRA 22 208 V  1,28 1,46 1,66 1,92 2,27 4,83 5,52 6,27 7,25 8,59
 240 V  1.70 1.95 2.21 2.55 3.03 6.44 7.36 8.36 9.67 11.46
TEMPRA 24 208 V  1.42 1.62 1.84 2.13 2.52 5.37 6.14 6.97 8.06 9.55
 240 V  1.89 2.16 2.45 2.84 3.36 7.16 8.18 9.29 10.74 12.73
TEMPRA 29 208 V  1.70 1.95 2.21 2.55 3.03 6.44 7.36 8.36 9.67 11.46
240 V  2.27 2.59 2.94 3.41 4.04 8.59 9.82 11.15 12.89 15.27
TEMPRA 36 208 V  2.13 2.43 2.76 3.19 3.78 8.06 9.21 10.45 12.08 14.32
 240 V  2.84 3.24 3.68 4.26 5.04 10.74 12.27 13.93 16.11 19.09
inlet temperature  
temperatura de entrada
Température d‘entrée          
inlet temperature  
temperatura de entrada
Température d‘entrée          

– 3 –
TEMPRA 12, TEMPRA 15, TEMPRA 20,
TEMPRA 24
TEMPRA 22, TEMPRA 29, TEMPRA 36
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26_02_02_0602 26_02_02_0603

– 4 –
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26_02_02_0606

– 5 –
G
TEMPRA 15, TEMPRA 20, TEMPRA 24
TEMPRA 22, TEMPRA 29, TEMPRA 36
>
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CKT 1 CKT 2 CKT 3
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
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TEMPRA 12
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CKT 1
CKT 1 CKT 2
CKT 1 CKT 2CKT 3
8791.02
8794.02 8792.02
8793.02
8794.02 8794.02
26_02_02_0599
26_02_02_0600
26_02_02_0608

– 6 –
Legend to figures
 Temperature adjustment knob
 Temperature display
 „Power“ light
 Hot water connection
 Cold water connection
 Wiring block
 Electronic control unit
 Safety thermal cut out
 Heating system
 Knock-outs for wires
 Water supply line for faucet installation
 Sink
 Cold valve (right)
 Hot valve (left)
 Screws and plastic wall anchors
General
The TEMPRA units are designed to supply hot
water for a house, apartment or certain com-
mercial applications. Unlike a conventional
storage type water heater the TEMPRA tan-
kless 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 ºF (30 ºC)
and 125 ºF (52 ºC). Please set the desired
temperature using the knob on the front
cover. The LED displays the temperature
that the unit will produce in °C. Please use
the conversion table on the unit in order to
obtain degree Fahrenheit. The maximum
temperature is electronically limited to 125 °F
(52 °C).
Recommended is a setting of
108 °F (42 °C) to 116 °F (47 °C).
           
             
             

              
          
             
             
          

          
             
           
               
             

In case the “Power” light 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, 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
[email protected] or fax us at USA
413-247-3369.
One TEMPRA can be used for the following
applications.
F
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
F
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
Mounting the unit







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
may 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C .
5. Mount unit securely to wall by putting four
screws through mounting holesD .
Screws and plastic wall anchors for moun-
ting on masonry or wood are provided.
Water connections
1. All plumbing work must comply with natio-
nal 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. An isolating valve E
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is an integral part
of the cold water inlet. This valve allows
the unit to be isolated for maintenance pur-
poses.
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 
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.
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.

– 7 –
English
26_02_02_0607
Water connections NPT 3/4“
Weight lbs. / kg 14.3 / 6.5 17.6 / 8.0 17.6 / 8.0 24.7 / 11.2 17.6 / 8.0 24.7 / 11.2 24.7 / 11.2
Dimensions height inch / mm 14 4/8 / 367
depth 4 5/8 / 116
width 14 5/8 / 372 14 5/8 / 372 14 5/8 / 372 21 6/8 / 552 14 5/8 / 372 21 6/8 / 552 21 6/8 / 552
Nominal water volume GAL / l 0.13 / 0.5 0.26 / 1.0 0.26 / 1.0 0.39 / 1.5 0.26 / 1.0 0.39 / 1.5 0.39 / 1.5
R equired wire size
AWG COPPER 6 6 2 x 8 2 x 8 2 x 8 2 x 8 3 x 8 3 x 8 2 x 6 2 x 6 3 x 8 3 x 8 3 x 6 3 x 6
Min. water flow
to activate unit
GPM / l/min 0.29 / 1.1 0.58 / 2.2 0.58 / 2.2 0.87 / 3.3 0.58 / 2.2 0.87 / 3.3 0.87 / 3.3
Tested to pressure PSI / bar 300 / 20
Technical Data
Min. required
circuit breaker size A 60 60 2 x 40 2 x 40 2 x 50 2 x 50 3 x 40 3 x 40 2 x 60 2 x 60 3 x 50 3 x 50 3 x 60 3 x 60
Electrical connection













1. All electrical work must comply with natio-
nal and applicable state and local electrical
codes.
2. The TEMPRA should be connected to pro-
perly grounded dedicated branch circuits
of proper voltage rating. Ground must be
brought to the “Ground“ at the circuit brea-
ker panel.
G A TEMPRA 12 can be conected to a
single circuit. Use a supply cable protected
by a double pole breaker (see
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).
The TEMPRA 15 to TEMPRA 36 must have
multiple power sources.
H A TEMPRA 15, 20 or a TEMPRA 24
require two independant circuits. Use two
supply cables protected by two seperate
double pole breakers (see
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).
I A TEMPRA 22, 29 or a TEMPRA 36
require three independant circuits. Use
three supply cables protected by three se-
perate double pole breakers (see
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).
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.
perature in degree Celsius. There is a con-
version table on the front cover that helps
to convert from degree Celsius to degree
Fahrenheit.
3. Turn on hot water and wait twenty seconds
until temperature has stabilized.
4. Check the water temperature with your
hand and make sure that it does not feel
too hot. Reduce if necessary.
5. 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 125 °F / 52 °C).
Hand over these instructions, to be kept
for future reference.
Normal maintenance
STIEBEL ELTRON TEMPRA tankless water he-
aters are designed for a very long service life.
Actual life expectancy will vary with water
quality and use. The unit itself does not re-
quire any regular maintenance. However, to
ensure consistent water flow, it is recommen-
ded to periodically remove scale and dirt that
may build up at the aerator of the faucet(s) or
in the shower head. E Also, the TEMPRA
has a built in filter screen
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that should be
cleaned from time to time. In order to do
this, turn off the cold water supply at the iso-
lating valve
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and remove the cap
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of the
filter screen. Clean screen and put the screen
and cap back into their original position.

TEMPRA




 TEMPRA 12 TEMPRA 15 TEMPRA 20 TEMPRA 22 TEMPRA 24 TEMPRA 29 TEMPRA 36
Working pressure PSI / bar max. 150 / 10
Max. amp. load A 44 50 2 x 26 2 x 30 2 x 35 2 x 40 3 x 26 3 x 30 2 x 44 2 x 50 3 x 35 3 x 40 3 x 44 3 x 50
Wattage kW 9  10.8  14.4  16.2  18  21.6  27 
Voltage V 208  208  208  208  208  208  208 
Phase 1 1 1 1 1 1 1
 
 
 
4. The wire must be fed through the knock-
outs located between the hot and cold
water connectionsG - I
1
2
3
4
5
6
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
9
. The “live“
wires must be connected to the slots on
the terminal block marked L and L. The
ground wire must be connected to slot
marked with the ground symbol (see
1
2
3
4
5
6
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
9
).
5. Reinstall the cover with screws.




Putting the water heater
into operation







1. Turn on circuit breakers to bring electrical
power to the unit.
2. Adjust the water temperature to the desi-
red level using the knob on the front cover
of the unit. The TEMPRA displays the tem-

– 8 –
J









256126/1 b
256126/1 b
256126/1 b
8834.03
8833.01
  TEMPRA 12 TEMPRA 15 TEMPRA 20 TEMPRA 22 TEMPRA 24 TEMPRA 29 TEMPRA 36
1 Heating system 26 65 84 26 90 25 24 91 58 26 90 25 26 65 84 24 91 58 26 65 84
2 Electronic control device: Master 26 47 17
3 Electronic control device: Slave 26 47 18
4 Safety thermal cut out 26 65 83 17 03 05 17 03 05 17 03 05 26 65 83 17 03 05 26 65 83
5 Flow sensor 26 65 85
6 Cold water connection 26 65 86 26 65 87 26 65 87 26 65 88 26 65 87 26 65 88 26 65 88
7 Warm water connection 26 65 90 26 65 91 26 65 91 24 91 68 26 65 91 24 91 68 24 91 68
8 Temperature adjustment knob 16 35 73
Spare parts J
Troubleshooting


Symptom Possible Cause Solution
No hot water
Water not hot enough
LED displays one of the following fault codes:
91, 92, 93, 94, 95, 96, 97
– circuit breakers off
– safety thermal cut-out tripped
– not enough flow rate to activate unit
– water flow rate too high
– voltage too low
– problem with electronic control module
– turn circuit breakers on
– reset thermal cut-out
– clean filter screen at unit
– clean faucet aerator or shower head
– reduce water flow rate until light on front
cover stops blinking
– supply correct voltage to unit
– contact STIEBEL ELTRON.

CAP 264655 / 33986 / 3 / 8064 · Wi · These instructions are subject to alteration notice!
WARRANTY

 
          




  
  


STIEBEL ELTRON, INC.
17 West Street
West Hatfield, MA 01088, USA
 
 
 

GARANTIE


     






               



STIEBEL ELTRON, INC.
17 West Street
West Hatfield, MA 01088, USA
 
 
 

GARANTÍA












STIEBEL ELTRON, INC.
17 West Street
West Hatfield, MA 01088, USA
 
 
 
