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

5

Electrical connection

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.
H
2. The 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.
9

Technical Data

Model
Phase
Voltage V
Wattage kW
Max. amp, load A
Min. required circuit brea- A
ker size
Required wire size AWG
COPPER
Max. Inlet temperature °F (°C)
Min. water flow to activate GPM (l/min) 0.26 (1.4)
unit
Nominal water volume GAL (l)
Max. working pressure PSI (bar)
Tested to pressure PSI (bar)
Weight lbs. (kg)
Dimensions
height inch (mm)
depth
width
Water connections NPT
– Tankless water heaters are considered a non-continuous load
– Conductors should be sized to maintain a voltage drop of less than 3 % under load
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 L1 and L2. The
ground wire must be connected to slot
marked with the ground symbol (see
WARNING: AS WITH ANY ELECTRIC
!
APPLIANCE, FAILURE TO ELECTRICALLY
GROUND UNIT MAY RESULT IN SERIOUS INJU-
RY OR DEATH.
6

Initial settings

F
Selection of °F or °C units
– Set jumper on the dial-printed circuit board
to °F or °C.
F
Temperature limiter
The TEMPRA PLUS output temperature can be
limited to 109 °F (43 °C) by setting the jumper to
position T
(reduced temperature)
red
7 Putting the water
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.
TEMPRA 12 TEMPRA 15
TEMPRA 12 Plus TEMPRA 15 Plus TEMPRA 20 Plus TEMPRA 24 Plus TEMPRA 29 Plus TEMPRA 36 Plus
1 1
240 240
208 208
9 12 10.8 14.4
44 50 2 x 26 2 x 30
60 60 2 x 40 2 x 40
6 6 2 x 8 2 x 8
131 (55)
0.53 (2.2)
0.13 (0.5) 0.26 (1.0)
150 (10)
300 (20)
13.2 (6.1) 15.4 (7.3)
14 1/2 (369)
4 5/8 (117)
16 5/8 (420)
3/4"
2. Turn on circuit breakers to bring electrical
15 (380)
3. Turn the temperature selector clockwise and
4. Adjust the water temperature to the desired
5. Turn on hot water and wait twenty seconds
A , H
. The "live"
6. Check the water temperature with your
I
).
7. Explain to the user how the unit works and
8
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.
PERSON. IN CASE OF MALFUNCTION PLEASE
CONTACT A LICENSED PLUMBER OR ELECTRI-
CIAN.
TEMPRA 20 TEMPRA 24
1 1
240 240
208 208
14.4 19.2 18 24
2 x 35 2 x 40 2 x 44 2 x 50
2 x 50 2 x 50 2 x 60 2 x 60
2 x 8 2 x 8 2 x 6 2 x 6
0.53 (2.2) 0.53 (2.2)
0.26 (1.0) 0.26 (1.0)
15.4 (7.3) 15.4 (7.3)
– 7 –
power to the unit.
anti-clockwise, to calibrate the set value
transducer.
level using the knob on the front cover of
the unit.
until temperature has stabilized.
hand and make sure that it does not feel
too hot. Reduce if necessary.
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 maintenance

THE TEMPRAS DO NOT CONTAIN ANY
!
PARTS SERVICEABLE BY THE LAY
1 1
240
208 208
21.6 28.8 27
3 x 35 3 x 40 3 x 44
3 x 50 3 x 50 3 x 60
3 x 8 3 x 8 3 x 6
0.79 (3.3) 0.79 (3.3)
0.39 (1.5) 0.39 (1.5)
17.6 (8.6) 17.6 (8.6)
240
36
3 x 50
3 x 60
3 x 6