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WWW.STIEBEL-ELTRON-USA.COM TEMPRA
®
TREND & TEMPRA
®
PLUS | 13
ENGLISH
INSTALLATION
COMMISSIONING THE WATER HEATER
9.1.3 Tempra 29, 36 Trend / Plus
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
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CKT 1
CKT 2
CKT 3
Tempra 29 or 36 Trend / Plus These units require three independent
circuits. Use three supply cables protected by three separate double
pole breakers.
9.2 Circuit connection
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.
f Cut the electrical connection cable to length and strip.
15˝ (380mm)
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The wire must be fed through the knock-outs located between
the hot and cold water connections (See 9.1, “Circuit layout”, pg.
12). The “live” wires must be connected to the slots on the
terminal block marked L1 and L2. The ground wire must be con-
nected to slot marked with the ground symbol (See 13.5, “Wiring
diagrams”, pg. 19 ).
9.3 Terminal block
Consult the chart below for the recommended torque amounts on
the terminal block screws.
Screw Size (mm) Min. Torque (N•cm) Min. Torque (lbf•in)
M6 200-250 17.7-22.1
Using the proper torque specifications to secure wire to the wiring
block helps to avoid personal loss or property damage.
10. Commissioning the water heater
!
WARNING: Open the hot water faucet for a few min-
utes 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.
f Check that the set value transducer cable is plugged into the
slot TSoll D on the main PCB. If the cable was disconnected
for any reason during installation, ensure it is reconnected to
slot TSoll D before supplying power to the water heater.
f Fill the unit up completely with water.
f Close the cover and fix it using the screw with the lock
washer.
f Turn on circuit breakers to bring electrical power to the unit.
f Adjust the water temperature to the desired level using the
knob on the front cover of the unit.
f Turn on hot water and wait twenty seconds until temperature
has stabilized.
f Check the water temperature with your hand and make sure
that it does not feel too hot. Reduce if necessary.
f Explain to the user how the unit works and familiarize them
with its use.
f Advise the user about possible hazards (hot water tempera-
ture up to 140 °F (60 °C)). Hand over these instructions, to be
kept for future reference.
11. Normal maintenance
!
NOTICE: The Tempra does not contain any parts ser-
viceable by the average user. 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. To ensure consistent water flow, it is recommend-
ed to periodically remove scale and dirt that may build up at the
aerator of the faucet(s), the filter screen in the unit, or the heating
canisters of the water heater.
Periodically check the water quality supplied to the water heater.
Water quality can have an impact on appliance longevity and may
not be covered under the manufacturer's warranty.
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