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

4

Water connections

NOT ICE: EXCESSIVE HEAT FROM
!
SOLDERING ON COPPER PIPES NEAR
THE TEMPRA MAY CAUSE DAMAGE.
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.
NOTICE: HARD WATER OR WATER
!
WITH A HIGH MINERAL COUNT MAY
DAMAGE THE UNIT. DAMAGE TO THE UNIT
CAUSED BY SCALE OR A HIGH MINERAL
COUNT IS NOT COVERED UNDER THE
WARRANTY.
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.
D
4. Also, the TEMPRA unit has a built in filter
1
screen that should be cleaned from time
to time. Clean screen and put the screen
2
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. The cold water connection to the unit must
be disconnected periodically in order to
access and clean the filter screen. It is
required to use water connections that are
easily detachable such as braided steel flex
connectors.
7. 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 inspector will not pass the
installation without a P&T, it should be instal-
led on the hot water outlet side of
the unit.
8. The TEMPRA on the hot side is designed for
connection to copper tubing, PEX tubing or
a braided stainless steel hose with a 3/4"
NPT female tapered thread.
The plumbing on the cold water inlet
side needs to be such that it can easily be
removed to allow access to the inlet filter
screen. The easiest way to achieve this is to
us a stainless steel braided hose connector.
If soldering near the unit is necessary,
please direct the flame away from the
housing of the unit in order to avoid
damage.
9. When all plumbing work is completed,
check for leaks and take corrective action
before proceeding.
5

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 PLUMBING MUST
BE COMPLETED BEFORE PROCEEDING WITH
ELECTRICAL HOOK-UP. WHERE REQUIRED BY
LOCAL, STATE OR NATIONAL ELECTRICAL CODES
THE CIRCUITS SHOULD BE EQUIPPED WITH A
"GROUND FAULT INTERRUPTER".
THE UNIT MUST BE PROPERLY GROUNDED
IN ACCORDANCE WITH STATE AND LOCAL
CODES, OR IN ABSENCE OF SUCH CODES, IN
ACCORDANCE WITH NATIONAL ELECTRIC CODE
OR THE CANADIAN ELECTRIC CODE. FAILURE TO
ELECTRICALLY GROUND THE PRODUCT COULD
RESULT IN SERIOUS PERSONAL INJURY OR DEATH.
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 12 B/Plus: These units can be
connected to a single circuit. Use a supply
cable protected by a double pole breaker (see
2
).
The TEMPRAS 15 to 36 must have multiple
power sources.
TEMPRA 15, 20 or 24 B/Plus: These units
require two independant circuits. Use two
supply cables protected by two separate
2
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 2 ).
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)
4. The wire must be fed through the knock-
outs located between the hot and cold
A , H
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
– 8 –
6

Initial settings

F 1
Selection of °F or °C units
– Set jumper on the dial-printed circuit board
to °F or °C.
2
F
Temperature limiter
The TEMPRA PLUS output temperature can be
limited to 109 °F (43 °C) by setting the jumper to
position T
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 PURGED
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.
8

Normal maintenance

NOTICE: THE TEMPRAS DO NOT CONTAIN
!
ANY PARTS SERVICEABLE BY THE LAY
PERSON. 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. The unit itself does not require any regular
maintenance. However, to ensure consistent
water flow, it is recommended to periodically
1
. The "live"
remove scale and dirt that may build up at the
aerator of the faucet(s), the filter screen in the
unit, or in the shower head.
I
).
(reduced temperature)
red