Electrical Connection; Putting The Water Heater Into Operation; Normal Maintenance; Technical Data - STIEBEL ELTRON Tempra 12 Installation Instructions Manual

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 PLUM-
BING MUST BE COMPLETED BEFORE
PROCEEDING WITH ELECTRICAL
HOOK-UP. WHERE REQUIRED BY LO-
CAL, STATE OR NATIONAL ELECTRI-
CAL CODES THE CIRCUITS SHOULD
BE EQUIPPED WITH A "GROUND FAULT
INTERRUPTER".
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
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
1
supply cables protected by two seperate
double pole breakers (see
2
I
3
A TEMPRA 22, 29 or a TEMPRA 36
require three independant circuits. Use
4
three supply cables protected by three se-
5
perate double pole breakers (see
6
Please refer to the technical data table for
7
the correct wire and circuit breaker size. In
8
9

Technical Data

10
Model
11
Phase
12
Voltage 13
14
Wattage
15
Max. amp. load
16
Min. required
17
circuit breaker size
18
Required wire size
AWG COPPER 6
19
Min. water flow
20
to activate unit GPM / l/min
21
Nominal water volume GAL / l
22
23
Working pressure PSI / bar
24
Tested to pressure PSI / bar
Weight lbs. / kg
Dimensions height inch / mm
depth
width
Water connections
– Suitable for supply with water up to 107.6 °F / 42 °C
– Tankless water heaters are considered a non-continuous load
– Conductors should be sized to maintain a voltage drop of less than 3 % under load
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
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
5. Reinstall the cover with screws.
WARNING: AS WITH ANY ELEC-
TRIC APPLIANCE, FAILURE TO
ELECTRICALLY GROUND UNIT MAY RE-
SULT IN SERIOUS INJURY OR DEATH.
Putting the water heater
1
into operation
).
2
3
WARNING: OPEN HOT WATER
FAUCET FOR A FEW MINUTES
4
UNTIL WATER FLOW IS CONTINUOUS
5
AND ALL AIR IS PURGED FROM WATER
6
PIPES. THE UNIT'S COVER MUST BE
7
INSTALLED BEFORE THE CIRCUIT BREA-
).
KERS ARE TURNED ON.
8
9
1. Turn on circuit breakers to bring electrical
1
10
power to the unit.
).
2
2. Adjust the water temperature to the desi-
11
3
red level using the knob on the front cover
12
of the unit. The TEMPRA displays the tem-
4
13
5
14
6
15
7
TEMPRA 12 TEMPRA 15
16
8
17
1 1
9
18
V 208 240 208 240
10
19
kW 9 12 10.8 14.4
11
20
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
12
21
13
22
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
14
23
15
24
6 2 x 8 2 x 8
16
17
0.29 / 1.1 0.58 / 2.2
18
0.13 / 0.5 0.26 / 1.0
19
20
21
14.3 / 6.5 17.6 / 8.0
22
23
24
14 5 / / 372 14 5 / / 372
8 8
NPT
G - I
1 . The "live"
2
1
3
2
4
).
3
5
4
6
5
7
6
8
7
9
8
10
9
11
10
12
11
13
12
14
13
15
14
16
15
17
16
18
17
19
18
20
19
21
20
22
21
23
22
24
23
24
TEMPRA 20 TEMPRA 22
1 1
208 240 208 240
14.4 19.2 16.2 21.6
2 x 8 2 x 8 3 x 8 3 x 8
0.58 / 2.2 0.87 / 3.3
0.26 / 1.0 0.39 / 1.5
max. 150 / 10
300 / 20
17.6 / 8.0 24.7 / 11.2
14 / / 367
4
8
4 5 / / 116
8
14 5 / / 372 21 6 / / 552
8 8
3/4"
– 7 –
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
1
may build up at the aerator of the faucet(s) or
2
E
in the shower head. Also, the TEMPRA
has a built in filter screen 3 that should be
cleaned from time to time. In order to do
4
this, turn off the cold water supply at the iso-
5
lating valve and remove the cap
1
6
filter screen. Clean screen and put the screen
2
7
and cap back into their original position.
3
8
4
OTHER THAN THE FILTER SCREEN,
9
THE TEMPRA DOES NOT CON-
5
10
TAIN ANY PARTS SERVICEABLE BY THE
6
11
LAY PERSON. IN CASE OF MALFUNC-
7
TION PLEASE CONTACT A LICENSED
12
8
PLUMBER OR ELECTRICIAN.
13
9
14
10
15
11
16
TEMPRA 24 TEMPRA 29
12
17
1 13 1
18
14
208 240 208 240
19
15
20
18 24 21.6 28.8
16
21
17
22
18
23
19
24
20
2 x 6 2 x 6 3 x 8 3 x 8
21
0.58 / 2.2 0.87 / 3.3
22
23
0.26 / 1.0 0.39 / 1.5
24
17.6 / 8.0 24.7 / 11.2
14 5 / / 372 21 6 / / 552
8 8
1
of the
2
3
4
5
6
7
8
9
10
11
12
TEMPRA 36
13
1
14
208 15 240
16
27 36
17
18
19
20
3 x 6 3 x 6
21
22
0.87 / 3.3
23
0.39 / 1.5
24
24.7 / 11.2
21 6 / / 552
8