General; Mounting The Unit; Water Connections - STIEBEL ELTRON Tempra 12 Installation Instructions Manual

THIS MANUAL MUST BE READ CAREFULLY BEFORE ATTEMPTING TO INSTALL THE TEMPRA WATER HEATER.
IF YOU DO NOT FOLLOW THE SAFETY RULES OR THE INSTRUCTIONS OUTLINED IN THIS MANUAL, THE UNIT
MAY NOT OPERATE PROPERLY AND IT COULD CAUSE PROPERTY DAMAGE, SERIOUS BODILY INJURY AND/
OR DEATH.
STIEBEL ELTRON, INC. WILL NOT BE LIABLE FOR ANY DAMAGES BECAUSE OF FAILURE TO COMPLY WITH THE
INSTALLATION AND OPERATING INSTRUCTIONS OUTLINED IN THIS MANUAL OR BECAUSE OF IMPROPER USE.
IMPROPER USE INCLUDES THE USE OF THIS APPLIANCE TO HEAT ANY LIQUID OTHER THAN WATER. FAILURE
TO COMPLY WITH THE INSTALLATION AND OPERATING INSTRUCTIONS OR IMPROPER USE VOIDS WARRANTY.
NEVER REMOVE THE UNIT'S COVER UNLESS THE ELECTRICITY IS TURNED OFF.
IF YOU HAVE ANY QUESTIONS REGARDING THE INSTALLATION OR OPERATION OF THIS WATER HEATER, OR
IF YOU NEED ANY ADDITIONAL INSTALLATION MANUALS, PLEASE CALL OUR TECHNICAL SERVICE LINE ON
800-582-8423 (USA AND CANADA ONLY). IF YOU ARE CALLING FROM OUTSIDE THE U.S. OR CANADA, PLEASE
CALL USA 413-247-3380 AND WE WILL REFER YOU TO A QUALIFIED STIEBEL ELTRON SERVICE REPRESENTATIVE
IN YOUR AREA.
Legend to figures
1
Temperature adjustment knob
2 Temperature scale
2.1 Temperature display
3 "Power" light
4 Knock-outs for wires
5 Safety thermal cut out
6 Outlet temperature sensor
7 Wiring block
8 Electronic control unit
9 Heating system
10 Flow sensor
11 Motor-operated valve
12 Cold water connection
13 Hot water connection
14 Hot valve (left)
15 Cold valve (right)
16 Sink
17 Water supply line for faucet/tap
installation
2

General

The TEMPRA and TEMPRA Plus units are
designed to supply hot water for a house,
apartment or certain commercial applications.
Unlike a conventional storage type water heater
the TEMPRAS tankless water heater does
not store hot water. Instead, water is heated
instantaneously as it flows through the unit.
The TEMPRAS 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 TEMPRAS will deliver any
water temperature between 86 °F (30 °C)
and 140 °F (60 °C). Please set the desired
temperature using the knob on the front cover.
The TEMPRA PLUS Temperature adjustment
knob can be set to: OFF, 86...140 °F (30...60 °C).
The TEMPRA has a °F and a °C scale. The output
temperature of the TEMPRA Plus is shown
in the digital display in °F or °C units. (°F or
°C units can be selected during installation,
factory setting: °F). The maximum temperature
is electronically limited to 140 °F (60 °C).
Recommended is a setting of
108 °F (42 °C) to 116 °F (47 °C).
The outlet temperature of the TEMPRA Plus
can be limited to 109 °F (43 °C).
In case the "Power" LED 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 TEMPRAS, 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 info@stiebel-eltron-
usa.com or fax us at USA 413-247-3369.
The TEMPRA can be used for the following
applications.
G
Typical residential installation
G
Typical commercial installation
3

Mounting the unit

UNIT MUST BE INSTALLED IN A VER-
!
TICAL POSITION WITH THE WATER
FITTINGS POINTING DOWNWARD. DO NOT
INSTALL UNIT WHERE IT WOULD ROUTINELY
BE SPLASHED WITH WATER. ELECTRIC SHOCK
MAY RESULT.
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
might 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 screw with chopper disc
C
and open the cover .
5. Mount unit securely to wall by putting at
least three screws through mounting holes
-
E
.
Screws and plastic wall anchors for
mounting on masonry or wood are
provided.
– 6 –
4

Water connections

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 TEMPRAS has built in filter
screen that should be cleaned from time
to time. Clean screen and put the screen
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.
NOTE: 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.
!
NOTE: EXCESSIVE HEAT FROM SOLDERING ON
!
COPPER PIPES NEAR THE TEMPRA MAY CAUSE
DAMAGE.
6. 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 in-
stalled 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.