Stiebel Eltron 239225 Installation Manual

OPERATION AND INSTALLATION OPERACIÓN E INSTALACIÓN UTILISATION ET INSTALLATION
TANKLESS ELECTRIC WATER HEATERS | CALENTADORES DE AGUA SIN TANQUE | CHAUFFE-EAU INSTANTANÉS ÉLECTRIQUES
»TEMPRA® 12 TREND »TEMPRA® 15 TREND
®
»TEMPRA
20 TREND »TEMPRA® 24 TREND »TEMPRA
®
29 TREND »TEMPRA® 36 TREND
Conforms to ANSI/UL Std. 499 Certified to CAN/CSA Std. C22.2 No.88
Conforme a ANSI/UL Std. 499 Certificación con CAN/CSA Std. C22.2 No.88
Conforme à la norme ANSI/UL Std. 499 Certifié à la norme CAN/CSA Std. C22.2 No.88
Tested and certified by WQA to NSF/ANSI372 for lead free compliance.
Probado y certificado por WQA NSF/ANSI 372 para el cumplimiento de las regulaciones sin plomo.
Testé et certifié par WQA à la NSF/ANSI 372 pour une utilisation sans plomb.
»TEMPRA® 12 PLUS »TEMPRA® 15 PLUS
®
»TEMPRA
20 PLUS »TEMPRA® 24 PLUS »TEMPRA
®
29 PLUS »TEMPRA® 36 PLUS
CONTENTS | OPERATION
OPERATION
1. General information _________________________________________2
2. Safety __________________________________________________________2
2.1 Intended use ______________________________________________________ 2
2.2 Safety precautions _______________________________________________ 3
2.3 Test symbols ______________________________________________________ 3
2.4 Licenses / certificates ___________________________________________ 3
3. Register your product _______________________________________3
4. General ________________________________________________________3
4.1 General appearance _____________________________________________ 4
5. Using the display _____________________________________________5
5.1 User input _________________________________________________________ 5
5.2 Tempra Trend display ___________________________________________ 5
5.3 Tempra Plus display _____________________________________________ 6
INSTALLATION
6. Installation configuration _________________________________ 10
6.1 Typical residential installation _______________________________10
6.2 Typical commercial installation ______________________________ 10
7. Mounting the unit __________________________________________ 10
7.1 Mounting dimensions __________________________________________10
7.2 Mounting instructions _________________________________________ 10
8. Water connections _________________________________________ 11
9. Electrical connection _______________________________________ 12
9.1 Circuit layout _____________________________________________________12
9.2 Circuit connection ______________________________________________ 13
9.3 Terminal block ___________________________________________________13
10. Commissioning the water heater _________________________ 13
11. Normal maintenance _______________________________________ 13
12. Troubleshooting ____________________________________________ 14
12.1 Tempra Plus error code reporting ___________________________ 14
12.2 Resetting the safety thermal cutout ________________________ 14
13. Technical data ______________________________________________ 15
13.1 Tempra Trend ____________________________________________________ 15
13.2 Tempra Plus ______________________________________________________ 16
13.3 Temp. increase above ambient water temp. ______________17
13.4 Dimensions _______________________________________________________ 18
13.5 Wiring diagrams ________________________________________________19
14. Spare parts _________________________________________________ 20
15. Warranty ____________________________________________________ 22
OPERATION
1. General information
Read this entire manual. Failure to follow all the guides, instruc­tions and rules could cause personal injury or property damage. Improper installation, adjustment, alteration, service and use of this unit can result in serious injury.
This unit must be installed by a licensed electrician and plumber. The installation must comply with all national, state and local plumbing and electric codes. Proper installation is the responsi­bility of the installer. Failure to comply with the installation and operating instructions or improper use voids the warranty.
Save these instructions for future reference. The installer should leave these instructions with the consumer.
If you have any questions regarding the installation, use or opera­tion of this water heater, or if you need any additional installation manuals, please call our technical service line at 800.582.8423 (USA and Canada only). If you are calling from outside the USA or Canada, please call USA 413.247.3380 and we will refer you to a qualified Stiebel Eltron service representative in your area.
This is the safety alert symbol. It is used to alert you to
!
potential personal injury hazard. Obey all safety mes­sages that follow this symbol to avoid possible injury or death.
2. Safety
Observe the following safety information and regulations. Operate the appliance only when fully installed and with all safety
equipment fitted.
2.1 Intended use
The appliance is intended for heating domestic hot water and can supply several draw-off points.
Any other use beyond that described shall be deemed inappro­priate, and may void the manufacturers warranty.
Observation of these instructions is also part of the correct use of this appliance.
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OPERATION
REGISTER YOUR PRODUCT
2.2 Safety precautions
DANGER: Injury
!
Please read and follow these instructions. Failure to follow these instructions could result in serious per­sonal injury or death.
DAMAGE TO THE APPLIANCE AND THE ENVIRONMENT:
!
The appliance must be installed by a licensed electrician and plumber. The installation must comply with all na­tional, state and local plumbing and electric codes. Service of the appliance must be performed by qualified service technicians.
DANGER: Electrocution Before proceeding with any installation, adjustment, alteration, or service of this appliance, all circuit breakers and disconnect switches servicing the appli­ance must be turned off. Never remove the appliance's cover unless the electricity servicing the appliance is turned off. Failure to do so could result in personal injury or death. The appliance must be properly grounded. Failure to electrically ground the product could result in serious personal injury or death.
DANGER: Burns Water temperatures over 125 °F (52 °C) can cause severe burns instantly or death from scalding. A hot water scalding potential exists if the thermostat on the appliance is set too high. Households with small children, disabled or elderly persons may require that the thermostat be set at 113 °F (45 °C) or lower to prevent possible injury from hot water.
WARNING: Injury
!
Where children or persons with limited physical, sen­sory or mental capabilities are to be allowed to con­trol this appliance, ensure that this will only happen under supervision or after appropriate instructions by a person responsible for their safety. Children should be supervised to ensure that they never play with the appliance.
2.3 Test symbols
See the type label on the appliance.
2.4 Licenses / certificates
- UL (USA) Std. 499
- CSA (Canada) Std.
- NSF/ANSI 372
C22.2 No.88
3. Register your product
You must register this product within 90 days of pur­chase on our web site in order to activate the standard warranty. Go to our web site at www.stiebel-eltron-usa.com and click on register your product.
Before beginning the registration process, we suggest that you gather the necessary information which will be as follows:
Type, Example: Tempra 24 Plus (from the label that is on the unit) Number listed after “Nr.” Place of Purchase Purchase Date First & Last Name Email address Physical Address Phone Number Installation Date
If you have any questions concerning the registration process or warranty, please contact Stiebel Eltron USA directly at
800.582.8423.
4. General
The Tempra Trend 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 Tempra tankless water heater does not store hot water. Instead, water is heated instantaneously as it flows through the unit. The Tempra 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 Tempra will deliver any water temperature between 68 °F (20 °C) and 140 °F (60 °C). Set the desired temperature using the knob on the front cover. The Tempra Trend and Tempra Plus temperature adjustment knob can be set to: OFF, 68–140 °F (20–60 °C). The maximum temperature is electronically limited to 140 °F (60 °C).
For reasons of appliance efficiency and durability (scaling), the optimum temperature setting lies between 86 °F (30 °C) and 120 °F (50 °C).
The Tempra has a built-in display that allows for user customiza­tion and information feedback.
ENGLISH
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OPERATION
GENERAL
4.1 General appearance
4.1.1 Tempra Trend
1
2
3
4
1 Display
button
2 T
max
3 Power status LED 4 Control knob
Tempra Trend display overview
4.1.2 Tempra Plus
1 2 3 4
1 Display 2 Preset 1 3 Power status LED 4 Control knob 5 Menu button 6 Preset 2
Tempra Plus display overview
6
5
5
6
5 Digit display 6 Power capacity status 7 T
indicator
max
8 Temperature unit indicator 9 Display-lock indicator
9
8
7
7
8
9
10
7 Primary digit display 8 Power capacity status 9 Display-lock indicator 10 Error code symbol 11 Secondary digit display
indicator
12 T
max
13 Savings statistics indicator 14 x1000 secondary display value 15 Gallons secondary display unit 16 kWh secondary display unit 17 Liters & liters per minute secondary display unit 18 Gallons per minute secondary display unit 19 Temperature unit for secondary display 20 Temperature unit for primary display
11
12 13
20
19
18
17
16
15
14
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OPERATION
USING THE DISPLAY
5. Using the display
5.1 User input
The Tempra Trend and Tempra Plus feature an interactive display that allow for user customization to increase the level of comfort for the user.
The menu structure is designed in an intuitive, linear way to make it as navigable as possible.
5.1.1 Tempra Trend user input
User input
T
button (pressing or holding this button
max
performs different functions)
Control knob (turn knob to change settings)
5.1.2 Tempra Plus user input
5.2.1 Base display
The base display shows the current temperature setpoint in your preferred temperature unit. The bar below the temperature shows the current operating capacity. As the hot water demand fluctu­ates, the power capacity status will change to show between 0 and 10 segments. The display below shows that the water heater is operating at 40% of capacity.
All other menu displays will revert back to the base display either after a 15 second period of time without user input, or after a 5 second hold of the T
button.
max
Changing the setpoint temperature
The setpoint temperature can be set between 68 °F (20 °C) and 140 °F (60 °C).
ENGLISH
User input
Information button (pressing or holding this button performs different functions)
Preset 1 button (pressing or holding this but­ton performs different functions)
Preset 2 button (pressing or holding this but­ton performs different functions)
Control knob (turn knob to change settings)
5.2 Tempra Trend display
The Tempra Trend display features a temperature and power ca­pacity display. The display is backlit and will illuminate whenever user input is detected. The backlight will time out and deactivate if no user input has been detected for 15 seconds.
For the name of each display element on the Tempra Trend, consult section 4.1.1, “Tempra Trend”, pg. 4.
The setpoint can be increased by turning the control knob clock­wise, and decreased by turning it counter-clockwise. The water heater can be deactivated while still powered by turning the con­trol knob counter-clockwise, past the 68 °F (20 °C) setting.
5.2.2 Parameters menu
While at the base display, holding the T
button for 5 seconds
max
will advance the display to the first parameter menu.
parameter setting
T
max
The first parameter menu sets the value for T
acts as a high temperature limiter. If the T
T
max
setpoint of the water heater cannot be set above the T
. The value of
max
value is set, the
max
max
value. This feature is useful in scenarios where scalding from hot water is a real possibility.
At the T value can be changed by rotating the control knob. The T
setting menu, the display will flash, indicating that the
max
max
value can be increased by turning the control knob clockwise, and de­creased by turning it counter-clockwise. The T
value can be de-
max
activated by turning the control knob counter-clockwise, past the 68 °F (20 °C) setting. The display will read "Off" if T
If the T
symbol is visible at the base display, then the T
max
is inactive.
max
max
func­tion is active and is limiting the maximum allowable temperature to the preset level.
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OPERATION
USING THE DISPLAY
Pressing the T
button once while at this display will move the
max
display onto the temperature units parameter setting.
Temperature units parameter setting
The Tempra Trend is capable of displaying temperature in either Fahrenheit or Celsius.
The current unit will be shown and the display will be flashing to indicate that the value can be changed. Rotate the control knob to change the value between Fahrenheit and Celsius.
Pressing the T
button once while at this display will move the
max
display onto the display-lock parameter setting.
Display-lock parameter setting
The display can be locked to prevent changes to the temperature setpoint. This menu will flash, indicating that the value can be changed by rotating the control knob. While the display shows "Off", the lock is not active. The lock is active when it reads "On".
display to the base display. Additionally, the display will revert to the base display after a 15 second period with no user input.
5.3 Tempra Plus display
The Tempra Plus features a primary and secondary display area allowing for multiple parameters or information to be displayed. The Tempra Plus is capable of displaying the current flow rate of the water passing through the water heater, as well as calculating the accumulated cost savings of having a tankless water heater compared to a tank-type water heater.
For the name of each display element on the Tempra Plus, consult section 4.1.2, “Tempra Plus”, pg. 4.
5.3.1 Base display
The Tempra Plus base display displays the current setpoint tem­perature in your preferred temperature unit in the top half of the display.
The bar below the temperature shows the current fraction of total capacity that the water heater is running at. As the hot water de­mand fluctuates, the power capacity status will change to show between 0 and 10 segments. The display below shows that the water heater is operating at 30% of capacity.
The bottom half of the display shows the current flow rate through the unit in either gallons per minute (gpm) or liters per minute (l/min).
If the display-lock parameter is set to "On" and the user either holds the T
button for 5 seconds or lets the display time out for
max
15 seconds, the display-lock will become active.
With the display-lock active, a lock will appear on the base display, and no parameters can be changed. In order to disable the lock, hold the T
button for 12 seconds. The lock will then disappear
max
from the display and all parameters can be changed again. Pressing the T
ter setting menu will move the display back onto T
button once while at the display-lock parame-
max
parameter
max
setting menu.
5.2.3 Returning to the base display
While navigating the display and on any menu other than the base display, holding the T
button for 5 seconds will return the
max
All other menus will revert back to the base display either after a 15 second period of time without user input, or after a 5 second hold of the Information button.
5.3.2 Information menu
The information menu structure displays additional information for the user. The information menu is accessed by pressing the Information button while at the base display.
Accumulated cost savings display
If the Information button is pressed while the display is showing the base display, the display will advance to the accumulated cost savings display.
The accumulated cost savings display will display "I1" in the top half of the display, and the bottom half of the display will alternate between "Cur" and the accumulated savings of the water heater.
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OPERATION
USING THE DISPLAY
The accumulated cost savings updates daily, and shows the es­timated savings for the user compared to an install where they would have had a tank-type water heater installed.
Temperature units parameter setting
The Tempra Plus is capable of displaying temperature in either Fahrenheit or Celsius.
ENGLISH
This savings estimate is based on the users electricity cost. For the most accurate estimate, the electricity cost per kWh should be set in the electricity cost parameter setting menu. For infor­mation on how to do this, see section “Electricity cost parameter setting”, pg. 8.
Pressing the Information button will advance back to the base display. The display will also revert back to the base display if no user input is detected for 15 seconds.
5.3.3 Parameters menu
The parameters menu allows multiple settings on the Tempra Plus to be altered. The parameters menu can be accessed by holding the Information button for 5 seconds.
parameter setting
T
max
The first parameter menu sets the value for T
acts as a high temperature limiter. If the T
T
max
setpoint of the water heater cannot be set above the T
. The value of
max
value is set, the
max
max
value. This feature is useful in scenarios where scalding from hot water is a real possibility.
The current unit will be shown and the secondary display value will be flashing to indicate that the value can be changed. Rotate the control knob to change the value between Fahrenheit and Celsius.
Pressing the Information button once while at this menu will move the display onto the volume units parameter setting.
Volume units parameter setting
The Tempra Plus is capable of displaying volume or volume flow in either gallons per minute (gpm) or liters per minute (l/min).
The current volume unit will be displayed and the value will be flashing to indicate that it can be changed. Rotate the control knob to change the value between gallons per minute and liters per minute.
Pressing the Information button once while at this menu will ad­vance the display to the electricity cost parameter setting.
At the T
setting menu, the temperature value will flash, indicat-
max
ing that the value can be changed by rotating the control knob. The
value can be increased by turning the control knob clockwise,
T
max
and decreased by turning it counter-clockwise. The T
value can
max
be deactivated by turning the control knob counter-clockwise, past the 68 °F (20 °C) setting. The display will read "Off" if T
max
is
inactive. If the T
symbol is visible at the base display, then the T
max
max
func-
tion is active and limiting the maximum allowable temperature. Pressing the Information button once while at this menu will move
the display onto the temperature units parameter setting.
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OPERATION
USING THE DISPLAY
Electricity cost parameter setting
The Tempra Plus has a built-in feature where it calculates the energy savings of the unit when compared to the average energy use of a tank-type water heater. In order for this feature to be accurate, the cost per kWh of electricity must be programmed into the software.
The secondary display will be flashing to indicate that the value can be changed by rotating the control knob. Consult your elec­tricity bill to determine the cost of electricity per kWh.
Pressing the Information button once while at this menu will ad­vance the display to the display-lock parameter setting.
Display-lock parameter setting
The display can be locked to prevent easy alteration of the tem­perature setpoint. This menu will flash, indicating that the value can be changed by rotating the control knob. While "Off" is dis­played, the lock is not active. The lock is active when the display reads "On".
Factory setting reset parameter
The temperature setpoint, preset values, temperature, & volume units can all be reset to their factory settings.
The display will be flashing to indicate that the value can be changed by rotating the control knob. When the value is set to "On", the reset must be confirmed by holding both Button 1 and Button 2 simultaneously for 5 seconds.
Pressing the Information button once will advance the display to the accumulated savings reset parameter menu.
Accumulated savings reset parameter
Much like the factory setting reset parameter, the calculated ac­cumulated savings value can be reset to zero.
If the display-lock parameter is set to "On" and the user either holds the Information button for 5 seconds or lets the display time out for 15 seconds, the display-lock will become active.
With the display-lock active, a lock will appear on the base display, and no parameters can be changed. In order to disable the lock, hold the Information button for 12 seconds. The lock will then disappear and all parameters can be changed again.
Pressing the Information button once while at the display-lock parameter setting menu will move the display onto the factory setting reset parameter menu.
The display will be flashing to indicate that the value can be changed by rotating the control knob. When the value is set to "On", the reset must be confirmed by holding both Button 1 and Button 2 simultaneously for 5 seconds.
Pressing the Information button once will advance the display to the display backlight time-out parameter.
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OPERATION
s
d
5
s
ds
s
USING THE DISPLAY
Display backlight time-out parameter
The backlight of the display can be set to be always on, or set to an automatic mode that deactivates when no user input is detected for 15 seconds.
The entire display and backlight will be flashing to indicate that the value can be changed by rotating the control knob. When the value is set to "On", the backlight will always be on. When the value is set to "Auto", it will automatically deactivate after 15 seconds of inactivity.
Pressing the Information button once while at this menu wil ad­vance the display to the backlight display brightness parameter menu.
Backlight display brightness parameter
The brightness of the display backlight can be adjusted to two different parameters. A high and low setting allows for user cus­tomization depending on the light conditions in the installation location.
Changing setpoint to preset values
While the display is at the base display, the user can press either Button 1 or Button 2 to change the setpoint to the buttons stored value.
PressPres
When the button is pressed, the setpoint value will change to whatever value was stored up to that point.
Changing the preset values
The preset values can be changed from the default setpoint values.
Hold 5
Hol
econ
seconds
To change the value of either preset 1 or preset 2, first rotate the control knob to the temperature that you want to set the preset value. Then hold the preset button for 5 seconds. The display will flash to indicate that the preset has been changed successfully.
ENGLISH
The power capacity status bar indicates the brightness setting. A full capacity bar indicates that the brightness is at the high setting. A half-full capacity bar indicates that the brightness is at the low setting.
Pressing the Information button once while at this menu will ad­vance the display back to the T "P1".
5.3.4 Temperature preset options
The Tempra Plus features two temperature preset settings to allow for quickly accessible setpoints. Button 1 and Button 2 are capable of each storing an independent setpoint value.
parameter setting page, labeled
max
5.3.5 Returning to the base display
While navigating the display and on any menu other than the base display, holding the Information button for 5 seconds will return the display to the base display. Additionally, the display will revert to the base display after a 15 second period with no user input.
5.3.6 Tempra Plus error menu
If the Tempra plus encounters an error, a wrench will illuminate in the bottom left of the display.
PressPres
While the wrench is showing, press the Information button to advance the display to the error display page. Consult section “Tempra Plus error code reporting”, pg. 14 for information on how to interpret the reported error code.
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INSTALLATION
INSTALLATION CONFIGURATION
INSTALLATION
6. Installation configuration
The Tempra can be used for the following applications.
6.1 Typical residential installation
6.2 Typical commercial installation
7.1 Mounting dimensions
A
B
C
D
EF
Dimensions
A ⅜ ( 1 0 mm)
G
7. Mounting the unit
NOTICE: Unit must be installed in a vertical position
!
with the water fittings pointing downward.
WARNING: Do not install unit where it would routinely be splashed with water. Electric shock may result.
CAUTION: Hot water outlet pipes leaving unit can be hot to the touch. Insulation must be used for hot water
pipes below 36˝ (0.9 m) due to burn risk to children.
NOTICE: This unit should not be installed in a location
!
where it may be exposed to temperatures less than 36 °F (2 °C). If the unit may be subject to freezing tem­peratures all water must be drained from the unit. Failure to comply with this instruction voids all war­ranties. The unit should be located in an area where water leakage from the unit or connections will not result in damage to the area adjacent to the unit. If such a loca­tion cannot be avoided it is recommended that a drain pan be installed under the unit.
B 12½ (318 mm) C 1 ( 26 mm) D ¾ ( 2 0 mm) E 7½ (190 mm) F 7½ (190 mm)
3
G
/
 (5 mm)
16
7.2 Mounting instructions
Install Tempra as close as possible to the main hot water draw­off points.
f Install Tempra in a frost free area. If frost might occur, re-
move unit before freezing temperatures set in.
f Leave a minimum of 5˝ (120 mm) of clearance on all sides for
servicing.
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INSTALLATION
WATER CONNECTIONS
8. Water connections
NOTICE: 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.
f All plumbing work must comply with national and applicable
state and local plumbing codes.
f A pressure reducing valve must be installed if the cold water
supply pressure exceeds 150 psi (10 bar).
ENGLISH
f Remove the cover screw.
f Open the front cover.
11
f Make certain that the cold water supply line has been flushed
to remove any scale and dirt.
f The Tempra unit has a 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.
2
1
1 Filter screen 2 Washer
f 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.
NOTICE: Tankless water heaters such as the Tempra
!
are not required to be equipped with a temperature and pressure relief valve (T&P). If the local inspector will not pass the installation without a T&P, it should be installed on the hot water outlet side of the unit.
f 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.
1
1 Mounting holes
f Mount unit securely to wall by putting at least three screws
through mounting holes. Screws and plastic wall anchors for mounting on masonry or wood are provided.
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f 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.
f When all plumbing work is completed, check for leaks and
take corrective action before proceeding.
INSTALLATION
ELECTRICAL CONNECTION
9. Electrical connection
WARNING: Electrocution
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.
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.
9.1 Circuit layout
9.1.1 Tempra 12 Trend / Plus
9.1.2 Tempra 15, 20, 24 Trend / Plus
CKT 1
CKT 2
CKT 1
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
Tempra 15, 20 or 24 Trend / Plus: These units require two independent circuits. Use two supply cables protected by two separate double pole breakers.
ON
ON
ON
ON
26_02_02_0568
26_02_02_0568
Tempra 12 Trend / Plus: These units can be connected to a single circuit. Use a supply cable protected by a double pole breaker.
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INSTALLATION
COMMISSIONING THE WATER HEATER
9.1.3 Tempra 29, 36 Trend / Plus
CKT 1
CKT 2
CKT 3
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
26_02_02_0881
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.
ENGLISH
OFF
OFF
OFF
OFF
OFF
OFF
Tempra 29 or 36 Trend / Plus These units require three independent circuits. Use three supply cables protected by three separate double pole breakers.
ON
ON
ON
ON
ON
ON
26_02_02_0568
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)
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 recommend­ed 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.
26_02_02_0893
Water quality can have an impact on appliance longevity and may
The wire must be fed through the knock-outs located between
not be covered under the manufacturer's warranty.
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 con­nected to slot marked with the ground symbol (See 13.5, “Wiring diagrams”, pg. 19 ).
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INSTALLATION
TROUBLESHOOTING
12. Troubleshooting
Symptom Possible cause Solution
No hot water
Not enough hot water/restricted hot water flow Water not hot enough
If you are not able to resolve a problem please contact us toll free at
800.582.8423 before removing the unit from the wall. Stiebel Eltron is happy to provide technical assistance. In most instances, we can resolve the problem over the phone.
circuit breakers off turn circuit breakers on not enough flow rate to acti­vate unit
flow sensor clogged/not spinning
water heater not plumbed correctly
filter screen clogged clean filter screen at unit scale built up on heating elements water flow rate too high
voltage too low supply correct voltage to unit safety thermal cutout has tripped
clean filter screen at unit clean faucet aerator or shower head remove flow sensor and blow through it to make sure wheel is spinning ensure cold water entering on right side and hot outlet exiting on left side
descale the heating elements using a descaling solution reduce water flow rate until power light on front cover stops blinking
turn off power supply, reset safety thermal cutout
12.2 Resetting the safety thermal cutout
DANGER: Electrocution
Do not attempt to reset the safety thermal cutout of this water heater unless power to the unit has been completely shut off at the circuit breakers.
The safety thermal cutout on the Tempra is designed to cut off electrical power to the heating elements if water of a too high temperature is encountered. When one of these safety cutouts have tripped, they must be reset manually.
1
12.1 Tempra Plus error code reporting
The Tempra Plus features the capability to self-diagnose and re­port operational issues that it encounters. For information on how the error will be shown on the Tempra Plus display see the section “Tempra Plus error menu”, pg. 9.
Error Cause Solution
2 inlet temperature sensor failure contact Stiebel Eltron techni-
cal support.
3
outlet temperature sensor failure
ensure the outlet temperature sensor cable is connected to the main control board contact Stiebel Eltron techni­cal support
1 Thermal safety cutouts To reset the safety cutouts, follow the following procedure:
f Turn off all circuit breakers attached to the water heater f Open the front cover of the water heater f Identify the safety thermal cutouts on the top of the cop-
per heating canisters. The buttons at the top are the reset buttons.
f Press down on the buttons, take note of whether they click
when pressed or not.
A heating canister that needs to be repeatedly reset may have a technical issue that should be addressed by Stiebel Eltron tech­nical support.
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INSTALLATION
TECHNICAL DATA
13. Technical data
13.1 Tempra Trend
Tempra 12
Tre nd
Part number 239213 239214 239215 239216 239217 239218 Electrical details Phase single 50/60 Hz single6 50/60 Hz single6 50/60 Hz single6 50/60 Hz single6 50/60 Hz single6 50/60 Hz Voltage 240 V 208 V 240 V 208 V 240 V 208 V 240 V 208 V 240 V 208 V 240 V 208 V Wattage 12 kW 9 kW 14.4 kW 10.8 kW 19.2 kW 14.4 kW 24 kW 18 kW 28.8 kW 21.6 kW 36 kW 27 kW Max. amp. load 1 x 50 A 1 x 44 A 2 x 30 A 2 x 26 A 2 x 40 A 2 x 35 A 2 x 50 A 2 x 44 A 3 x 40 A 3 x 35 A 3 x 50 A 3 x 44 A Number & min. recommended size of circuit
1
breakers
(DP)
1 x 50
A
Power connection 1/GRD 2/GRD 2/GRD 2/GRD 3/GRD 3/GRD Min. recommended wire size (copper)
2
1 x 8/2 AWG 2 x 10/2 AWG 2 x 8/2 AWG 2 x 8/2 AWG 3 x 8/2 AWG 3 x 8/2 AWG Connections Water connection 3/4˝ NPT Max. cold water temperature 108 °F (42 °C) Hydraulic data Rated capacity 0.13 gal (0.5 l) 0.26 gal (1.0 l) 0.26 gal (1.0 l) 0.26 gal (1.0 l) 0.39 gal (1.5 l) 0.39 gal (1.5 l) Values Min. water flow to activate unit 0.37 gpm
(1.4
l/min)
Max. permissible inlet temperature 131 °F (55 °C) Application limits Min. permissible pressure 30 psi (0.2 MPa) Max. permissible pressure 150 psi (1.0 MPa) Test pressure 300 psi (2.0 MPa) Versions Cap and back panel sheet steel Color alpine white Dimensions Height 14 ½˝ (369 mm) Width 16 5/8˝ (420 mm) Depth 4 5/8˝ (117 mm) Weights Weight 13.5 lbs (6.1 kg) 16.1 lbs (7.3 kg) 16.1 lbs (7.3 kg) 16.1 lbs (7.3 kg) 19 lbs (8.6 kg) 19 lbs (8.6 kg)
1
This is our recommendation for overcurrent protection sized at 100% of load. Check local codes for compliance if necessary.
2
Copper conductors with a temperature rating of 75 °C or greater must be used. Conductors should be sized to maintain a voltage drop of less than 3% under load.
3
Requires a 150 A main service.
4
Requires a 200 A main service.
5
Requires a 300 A main service.
6
29 Trend & 36 Trend may be wired for balanced 3-phase 208 V. 15 Trend, 20 Trend, 24 Trend may be wired for unbalanced 3-phase 208 V.
Tempra 15 Tre nd
2 x 30
A
0.5 gpm (1.9
l/min)
Tempra 20 Tre nd
2 x 40
2 x 35
A
0.5 gpm (1.9
l/min)
Tempra 24 Tre nd
2 x 50
A
0.5 gpm (1.9
A
l/min)
3
Tre nd
3 x 40
4
3 x 35
A
0.77 gpm (2.9
l/min)
Tempra 29
Tempra 36 Tre nd
3 x 50
A
0.77 gpm (2.9
5
A
l/min)
ENGLISH
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INSTALLATION
TECHNICAL DATA
13.2 Tempra Plus
Tempra 12 Plus Tempra 15 Plus Tempra 20
Plus
Tempra 24
3
Plus
Tempra 29
4
Plus
Tempra 36
5
Plus
Part number 239219 239220 239221 239222 239223 239225 Electrical details Phase single 50/60 Hz single6 50/60 Hz single6 50/60 Hz single6 50/60 Hz single6 50/60 Hz single6 50/60 Hz Voltage 240 V 208 V 240 V 208 V 240 V 208 V 240 V 208 V 240 V 208 V 240 V 208 V Wattage 12 kW 9 kW 14.4 kW 10.8 kW 19.2 kW 14.4 kW 24 kW 18 kW 28.8 kW 21.6 kW 36 kW 27 kW Max. amp. load 1 x 50 A 1 x 44 A 2 x 30 A 2 x 26 A 2 x 40 A 2 x 35 A 2 x 50 A 2 x 44 A 3 x 40 A 3 x 35 A 3 x 50 A 3 x 44 A Number & min. recommended size of circuit
1
breakers
(DP)
1 x 50
A
2 x 30
A
2 x 40
2 x 35
A
2 x 50
A
A
3 x 40
3 x 35
A
3 x 50
A
A
Power connection 1/GRD 2/GRD 2/GRD 2/GRD 3/GRD 3/GRD Min. recommended wire size (copper)
2
1 x 8/2 AWG 2 x 10/2 AWG 2 x 8/2 AWG 2 x 8/2 AWG 3 x 8/2 AWG 3 x 8/2 AWG Connections Water connection 3/4˝ NPT Max. cold water temperature 108 °F (42 °C) Hydraulic data Rated capacity 0.13 gal (0.5 l) 0.26 gal (1.0 l) 0.26 gal (1.0 l) 0.26 gal (1.0 l) 0.39 gal (1.5 l) 0.39 gal (1.5 l) Values Min. water flow to activate unit 0.37 gpm
(1.4
l/min)
0.5 gpm (1.9
l/min)
0.5 gpm (1.9
l/min)
0.5 gpm (1.9
l/min)
0.77 gpm (2.9
l/min)
0.77 gpm (2.9
l/min)
Max. permissible inlet temperature 131 °F (55 °C) Application limits Min. permissible pressure 30 psi (0.2 MPa) Max. permissible pressure 150 psi (1.0 MPa) Test pressure 300 psi (2.0 MPa) Versions Cap and back panel sheet steel Color alpine white Dimensions Height 14 ½˝ (369 mm) Width 16 5/8˝ (420 mm) Depth 4 5/8˝ (117 mm) Weights Weight 13.5 lbs (6.1 kg) 16.1 lbs (7.3 kg) 16.1 lbs (7.3 kg) 16.1 lbs (7.3 kg) 19 lbs (8.6 kg) 19 lbs (8.6 kg)
1
This is our recommendation for overcurrent protection sized at 100% of load. Check local codes for compliance if necessary.
2
Copper conductors with a temperature rating of 75 °C or greater must be used. Conductors should be sized to maintain a voltage drop of less than 3% under load.
3
Requires a 150 A main service.
4
Requires a 200 A main service.
5
Requires a 300 A main service.
6
Tempra 29 Plus & 36 Plus may be wired for balanced 3-phase 208 V. Tempra 15 Plus, 20 Plus, 24 Plus may be wired for unbalanced 3-phase 208 V.
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INSTALLATION
TECHNICAL DATA
13.3 Temp. increase above ambient water temp.
Hot water flow rate [ GPM ] Hot water flow rate [ l/m ]
Hot water outlet temperature 105 °F Hot water outlet temperature 40 °C
Cold water inlet temp. 39 °F 59 °F 77 °F 95 °F 113 °F 131 °F 4 °C 15 °C 25 °C 35 °C 45 °C 55 °C
Tempra 12 Trend / 12 Plus
Tempra 15 Trend / 15 Plus 10.8 kW @ 208 V 1.14 1.63 2.72 6.61 - - 4.30 6.19 10.31 25.00 - -
Tempra 20 Trend / 20 Plus 14.4 kW @ 208 V 1.51 2.18 3.63 6.61 - - 5.73 8.25 13.75 25.00 - -
Tempra 24 Trend / 24 Plus
Tempra 29 Trend / 29 Plus 21.6 kW @ 208 V 2.27 3.27 5.45 6.61 - - 8.59 12.37 20.62 25.00 - -
Tempra 36 Trend / 36 Plus
Tempra 12 Trend / 12 Plus
Tempra 15 Trend / 15 Plus 10.8 kW @ 208 V 1.00 1.36 2.04 4.09 6.61 - 3.77 5.16 7.7 3 15.47 25.00 -
Tempra 20 Trend / 20 Plus 14.4 kW @ 208 V 1.33 1.82 2.72 5.45 6.61 - 5.03 6.87 10.31 20.62 25.00 -
Tempra 24 Trend / 24 Plus
Tempra 29 Trend / 29 Plus 21.6 kW @ 208 V 1.99 2.72 4.09 6.61 6.61 - 7.5 4 10.31 15.47 25.00 25.00 -
Tempra 36 Trend / 36 Plus
9 kW @ 208 V 0.95 1.36 2.27 6.61 - - 3.58 5.16 8.59 25.00 - -
12 kW @ 220–240 V 1.26 1.82 3.03 6.61 - - 4.77 6.87 11.46 25.00 - -
14.4 kW @ 220–240 V 1.51 2.18 3.63 6.61 - - 5.73 8.25 13.75 25.00 - -
19.2 kW @ 220–240 V 2.02 2.91 4.84 6.61 - - 7.6 4 11.00 18.33 25.00 - ­18 kW @ 208 V 1.89 2.72 4.54 6.61 - - 7.16 10.31 17.18 25.00 - -
24 kW @ 220–240 V 2.52 3.63 6.05 6.61 - - 9.55 13.75 22.91 25.00 - -
28.8 kW @ 220–240 V 3.03 4.36 6.61 6.61 - - 11.46 16.50 25.00 25.00 - ­27 kW @ 208 V 2.84 4.09 6.61 6.61 - - 10.74 15.47 25.00 25.00 - -
36 kW @ 220–240 V 3.78 5.45 6.61 6.61 - - 14.32 20.62 25.00 25.00 - -
Hot water flow rate [ GPM ] Hot water flow rate [ l/m ]
Hot water outlet temperature 113 °F Hot water outlet temperature 45 °C
Cold water inlet temp. 39 °F 59 °F 77 °F 95 °F 113 °F 131 °F 4 °C 15 °C 25 °C 35 °C 45 °C 55 °C
9 kW @ 208 V 0.83 1.14 1.70 3.41 6.61 - 3.14 4.30 6.44 12.89 25.00 -
12 kW @ 220–240 V 1.11 1.51 2.27 4.54 6.61 - 4.19 5.73 8.59 17.18 25.00 -
14.4 kW @ 220–240 V 1.33 1.82 2.72 5.45 6.61 - 5.03 6.87 10.31 20.62 25.00 -
19.2 kW @ 220–240 V 1.77 2.45 3.63 6.61 6.61 - 6.71 9.16 13.75 25.00 25.00 ­18 kW @ 208 V 1.66 2.27 3.41 6.61 6.61 - 6.29 8.59 12.89 25.00 25.00 -
24 kW @ 220–240 V 2.21 3.03 4.54 6.61 6.61 - 8.38 11.46 17.18 25.00 25.00 -
28.8 kW @ 220–240 V 2.66 3.63 5.45 6.61 6.61 - 10.06 13.75 20.62 25.00 25.00 ­27 kW @ 208 V 2.49 3.41 5.11 6.61 6.61 - 9.43 12.89 19.33 25.00 25.00 -
36 kW @ 220–240 V 3.32 4.54 6.61 6.61 6.61 - 12.57 17.18 25.00 25.00 25.00 -
ENGLISH
Hot water flow rate [ GPM ] Hot water flow rate [ l/m ]
Hot water outlet temperature 140 °F Hot water outlet temperature 60 °C
Cold water inlet temp. 39 °F 59 °F 77 °F 95 °F 113 °F 131 °F 4 °C 15 °C 25 °C 35 °C 45 °C 55 °C
Tempra 12 Trend / 12 Plus
Tempra 15 Trend / 15 Plus 10.8 kW @ 208 V 0.73 0.91 1.17 1.63 2.72 6.61 2.76 3.44 4.42 6.19 10.31 25.00
Tempra 20 Trend / 20 Plus 14.4 kW @ 208 V 0.97 1.21 1.56 2.18 3.63 6.61 3.68 4.58 5.89 8.25 13.75 25.00
Tempra 24 Trend / 24 Plus
Tempra 29 Trend / 29 Plus 21.6 kW @ 208 V 1.46 1.82 2.33 3.27 5.45 6.61 5.52 6.87 8.84 12.37 20.62 25.00
Tempra 36 Trend / 36 Plus
9 kW @ 208 V 0.61 0.76 0.97 1.36 2.27 6.61 2.30 2.86 3.68 5.16 8.59 25.00
12 kW @ 220–240 V 0.81 1.01 1.30 1.82 3.03 6.61 3.07 3.82 4.91 6.87 11.46 25.00
14.4 kW @ 220–240 V 0.97 1.21 1.56 2.18 3.63 6.61 3.68 4.58 5.89 8.25 13.75 25.00
19.2 kW @ 220–240 V 1.30 1.61 2.08 2.91 4.84 6.61 4.91 6.11 7.8 6 11.00 18.33 25.00 18 kW @ 208 V 1.22 1.51 1.95 2.72 4.54 6.61 4.60 5.73 7.36 10.31 17.18 25.00
24 kW @ 220–240 V 1.62 2.02 2.59 3.63 6.05 6.61 6.14 7.64 9.82 13.75 22.91 25.00
28.8 kW @ 220–240 V 1.95 2.42 3.11 4.36 6.61 6.61 7. 36 9.16 11.78 16.50 25.00 25.00 27 kW @ 208 V 1.82 2.27 2.92 4.09 6.61 6.61 6.90 8.59 11.05 15.47 25.00 25.00
36 kW @ 220–240 V 2.43 3.03 3.89 5.45 6.61 6.61 9.21 11.46 14.73 20.62 25.00 25.00
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INSTALLATION
TECHNICAL DATA
13.4 Dimensions
Tempra Trend / Tempra Plus
B
A
Tempra Trend Tempra Plus
Dimensions
A 14½ (369 mm) B 4½ (114 mm) C ¾ (18 mm) D 811/16 (220 mm) E 16½ (422 mm)
C
D
E
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INSTALLATION
TECHNICAL DATA
13.5 Wiring diagrams
13.5.1 Tempra 12 Trend / Plus
642
531
13.5.2 Tempra 15, 20 Trend / Plus
6
11/12
5
4
9/10
3
2
7/8
1
13
CKT 1
1
14 15
13.5.3 Tempra 24 Trend / Plus
ENGLISH
642
531
4
6
2
3
5
13.5.4 Tempra 29 Trend / Plus
D0000039679
642
531
6
11/12
5
4
9/10
3
2
7/8
1
13
CKT 1
14 15
CKT 2
1
4
6
2
3
5
D0000039677
42
51
42
51
6
11/12
5
4
9/10
3
2
7/8
1
13
CKT 1
14 15
CKT 2
1
42
51
4
42
51
42
51
6
11/12
5
4
9/10
3
2
7/8
1
13
CKT 1
14 15
CKT 2
1
CKT 3
4
2
5
D0000039676
2
13.5.5 Tempra 36 Trend / Plus
5
D0000039678
642
531
642
531
642
531
6
11/12
5
4
9/10
3
2
7/8
1
13
CKT 1
14 15
CKT 2
1
CKT 3
4
6
2
3
5
D0000039675
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INSTALLATION
SPARE PARTS
14. Spare parts
Spare par t No.
Tempra 12 Trend 331894 323686 279998 286360 286369 286375 286461 Tempra 15 Trend 331894 323686 279997 286361 286369 286845 286461 Tempra 20 Trend 331894 323686 279997 286362 286369 286845 286461 Tempra 24 Trend 331894 323686 279997 286364 286369 286376 286461 Tempra 29 Trend 331894 323686 279996 286373 286369 286378 286461 Tempra 36 Trend 331894 323686 279996 286374 286369 286379 286461 Tempra 12 Plus 331926 323686 279998 286360 286369 286375 286461 Tempra 15 Plus 331926 323686 279997 286361 286369 286845 286461 Tempra 20 Plus 331926 323686 279997 286362 286369 286845 286461 Tempra 24 Plus 331926 323686 279997 286364 286369 286376 286461 Tempra 29 Plus 331926 323686 279996 286373 286369 286378 286461 Tempra 36 Plus 331926 323686 279996 286374 286369 286379 286461
Tempra 12 Trend 278698 --- 331933 280677 056755 326141 278695 Tempra 15 Trend 278698 --- 331933 280677 056755 326141 278695 Tempra 20 Trend 278698 --- 331933 280677 056755 326141 278695 Tempra 24 Trend 278698 --- 331933 280677 056755 326141 278695 Tempra 29 Trend 278698 --- 331933 280677 056755 326141 278695 Tempra 36 Trend 278698 --- 331933 280677 056755 326141 278695 Tempra 12 Plus 278698 220502 331934 280677 056755 326141 --­Tempra 15 Plus 278698 220502 331934 280677 056755 326141 --­Tempra 20 Plus 278698 220502 331934 280677 056755 326141 --­Tempra 24 Plus 278698 220502 331934 280677 056755 326141 --­Tempra 29 Plus 278698 220502 331934 280677 056755 326141 --­Tempra 36 Plus 278698 220502 331934 280677 056755 326141 ---
1 2 3 4 5 6 7
Housing
Spare par t No.
8 9 10 11 12 13 14
Plumbing connec­tion 3/4˝
Temp. control knob Wiring block Heating system Safety thermal
cutout
Advanced Flow Control
Electronic temp. control
Temperature sensor
Filter screen Set point case Inlet pipe elbow
Electronic control device
Flow sensor
Spare par t No.
15 16
Valve assembly LCD Display
Tempra 12 Trend --- 331933 Tempra 15 Trend --- 331933 Tempra 20 Trend --- 331933 Tempra 24 Trend --- 331933 Tempra 29 Trend --- 331933 Tempra 36 Trend --- 331933 Tempra 12 Plus 280622 331934 Tempra 15 Plus 280622 331934 Tempra 20 Plus 280622 331934 Tempra 24 Plus 280622 331934 Tempra 29 Plus 280622 331934 Tempra 36 Plus 280622 331934
20 | TEMPRA® TREND & TEMPRA® PLUS WWW.STIEBEL-ELTRON-USA.COM
INSTALLATION
a
d
SPARE PARTS
5
11
7
4
Tempra
Plus
15
8
8
12
16
9
6
3
Tempra Trend
14
13
Tempra Plus
10
10
Tempra
pr
Trend
n
ENGLISH
1
i
2
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