Stiebel Eltron 239222 Tankless Water Heater Operational Manual

Stiebel Eltron 239222 Tankless Water Heater

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 at 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 hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

Safety

Observe the following safety information and regulations. Operate the appliance only when fully installed and with all safety equipment fitted.

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 inappro-priate and may void the manufacturer’s warranty. Observation of these instructions is also part of the correct use of this appliance.

Safety Precautions

DANGER: Injury
Please read and follow these instructions. Failure to follow these instructions could result in serious per-sonal 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 appliances 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, and 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.

Test symbols
See the type label on the appliance.

Licences / certificates

• UL (U.S.A) Std. 499
• CSA (Canada) Std. C22.2 No.88
• NSF/ANSI 372

Register your product
You must register this product within 90 days of purchase on our website to activate the standard warranty. Go to our website 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)
The 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 EL-TRON USA DIRECTLY AT (800)-582-8423.

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.

General Appearance

Tempra Trend

1. Display
2. Tmax button
3. Power status LED
4. Control knob

Tempra Trend display overview

• Digit display
• Power capacity status
• Tmax indicator
• Temperature unit indicator
• Display-lock indicator

Tempra Plus

1. Display

2. Preset 1

3. Power status LED

4. Control knob

5. Menu button

6. Preset 2
   Tempra Plus display overview

7. Primary digit display

8. Power capacity status

9. Display-lock indicator

10. Error code symbol

11. Secondary digit display

12. Tmax indicator

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

Using the display

User input
The Tempra Trend and Tempra Plus feature an interactive display that allows 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.

Tempra Trend user input

User input

• Tmax button (pressing or holding this button performs different functions)
• Control knob (turn knob to change settings)

Tempra Plus user input

• Information button (pressing or holding this button performs different functions)
• Preset 1 button (pressing or holding this but-ton performs different functions)
• Preset 2 button (pressing or holding this but-ton performs different functions)
• Control knob (turn knob to change settings)

Tempra Trend display
The Tempra Trend display features a temperature and power capa-city 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.

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 fluc-tuates, 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 to the base display either after 15 seconds without user input or after a 5-second hold of the Tmax button.

Changing the setpoint temperature
The setpoint temperature can be set between 68°F (20°C) and 140°F (60°C). 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.

Parameters menu
While at the base display, holding the Tmax button for 5 seconds will advance the display to the first parameter menu.

Tmax parameter setting
The first parameter menu sets the value for Tmax. The value of Tmax acts as a high-temperature limiter. If the Tmax value is set, the setpoint of the water heater cannot be set above the Tmax value. This feature is useful in scenarios where scalding from hot water is a real possibility.

At the Tmax setting menu, the display will flash, indicating that the value can be changed by rotating the control knob. The Tmax value can be increased by turning the control knob clockwise and decreased by turning it counter- clockwise. The Tmax value can be deactivated by turning the control knob counter-clockwise, past the 68°F (20°C) setting. The display will read “Off” if Tmax is inactive. If the Tmax symbol is visible at the base display, then the Tmax function is active and is limiting the maximum allowable temperature to the preset level.

Pressing the Tmax button once while at this display will move the 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 Tmax button once while at this display will move the 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”.

If the display-lock parameter is set to “On” and the user either holds the Tmax 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. To disable the lock, hold the Tmax button for 12 seconds. The lock will then disappear from the display and all parameters can be changed again.
Pressing the Tmax button once while at the display-lock parameter setting menu will move the display back onto the Tmax parameter setting menu.

Returning to the base display
While navigating the display and on any menu other than the base display, holding the Tmax button for 5 seconds will return the display to the base display. Additionally, the display will revert to the base display after 15 seconds with no user input.

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

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).

All other menus will revert to the base display either after 15 seconds without user input or after a 5-second hold of the Information button.\

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.

• The accumulated cost savings update daily and show the estimated savings for the user compared to an install where they would have had a tank-type water heater installed.
• This savings estimate is based on the user’s 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 the section “Electricity cost parameter setting”, pg. 8.
• Pressing the Information button will advance back to the base display. The display will also revert to the base display if no user input is detected for 15 seconds.

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.

Tmax parameter setting
The first parameter menu sets the value for Tmax. The value of Tmax acts as a high-temperature limiter. If the Tmax value is set, the setpoint of the water heater cannot be set above the Tmax value. This feature is useful in scenarios where scalding from hot water is a real possibility.

• At the Tmax setting menu, the temperature value will flash, indicating that the value can be changed by rotating the control knob. The Tmax value can be increased by turning the control knob clockwise, and decreased by turning it counter-clockwise. The Tmax value can be deactivated by turning the control knob counter-clockwise, past the 68°F (20°C) setting. The display will read “Off” if Tmax is inactive.
• If the Tmax symbol is visible at the base display, then the Tmax 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.

Temperature units parameter setting
The Tempra Plus is capable of displaying temperatures in either Fahrenheit or Celsius.

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.

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. 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”.

• 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. 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.

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.

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.

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 will 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.

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 Tmax parameter setting page, labeled “P1”.

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.

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 button’s stored value.

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.

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.

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.

Tempra Plus error menu
If the Tempra Plus encounters an error, a wrench will illuminate in the bottom left of the display.

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.

INSTALLATION

Installation configuration
The Tempra can be used for the following applications.

Typical residential installation

Typical commercial installation

Mounting the unit

NOTICE
The unit must be installed in a vertical position with the water fittings pointing downward.

WARNING
Do not install a unit where it would routinely be splashed with water. Electric shock may result. CAUTION: Hot water outlet pipes leaving the 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.

Mounting dimensions

Dimensions

• A ⅜˝ (10 mm)
• B 12½˝ (318 mm)
• C 1˝ (26 mm)
• D ¾˝ (20 mm)
• E 7½˝ (190 mm)
• F 7½˝ (190 mm)
• G 3/16˝ (5 mm)

Mounting instructions
Install Tempra as close as possible to the main hot water drawoff points.

• Install Tempra in a frost-free area. If frost might occur, remove the unit before freezing temperatures set in.
• Leave a minimum of 5″ (120 mm) of clearance on all sides for servicing.

WATER CONNECTIONS

Remove the cover screw.

Open the front cover.

Mounting holes

• Mount the unit securely to the wall by putting at least three screws through mounting holes. Screws and plastic wall anchors for mounting on masonry or wood are provided.

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 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.

• All plumbing work must comply with national and applicable state and local plumbing codes.
• A pressure-reducing valve must be installed if the cold water supply pressure exceeds 150 PSI (10 bar).
• Make certain that the cold water supply line has been flushed to remove any scale and dirt.
• The Tempra unit has a built-in filter screen that should be cleaned from time to time. Clean the screen and put the screen and the washer back into their original position.

1. Filter screen
2. Washer

• 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.

• 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 use a stainless steel braided hose connector. If soldering near the unit is necessary, please direct the flame away from the housing of the unit to avoid damage.
• When all plumbing work is completed, check for leaks and take corrective action before proceeding.

ELECTRICAL CONNECTION

WARNING: Electrocution Before beginning any work on the electric installation, be sure that the 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 following state and local codes, or in the absence of such codes, following the 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.

Circuit Layout

Tempra 12 Trend / Plus

CKT 1

Tempra 12 Trend / Plus: These units can be connected to a single circuit. Use a supply cable protected by a double pole breaker.

Tempra 15, 20, 24 Trend / Plus

CKT 1 CKT 2

Tempra 15, 20, or 24 Trend / Plus : These units require two independent circuits. Use two supply cables protected by two separate double pole breakers.

COMMISSIONING THE WATER HEATER

Tempra 29, 36 Trend / Plus

Tempra 29 or 36 Trend / Plus These units require three independent circuits. Use three supply cables protected by three separate double pole breakers.

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.

• Cut the electrical connection cable to length and strip.
  

• 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 connected to slot marked with the ground symbol (See 13.5, “Wiring Diagrams”, pg. 19 ).

Terminal block
Consult the chart below for the recommended torque amounts on the terminal block screws.

Using the proper torque specifications to secure wire to the wiring block helps to avoid personal loss or property damage.

Commissioning the water heater

WARNING: Open the 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.

• Fill the unit up completely with water.
• Close the cover and fix it using the screw with the lock washer.
• Turn on circuit breakers to bring electrical power to the unit.
• Adjust the water temperature to the desired level using the knob on the front cover of the unit.
• Turn on hot water and wait twenty seconds until the temperature has stabilized.
• Check the water temperature with your hand and make sure that it does not feel too hot. Reduce if necessary.
• Explain to the user how the unit works and familiarize them 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

NOTICE: The Tempra does not contain any parts serviceable 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. Water quality can have an impact on appliance longevity and may not be covered under the manufacturer’s warranty.

Troubleshooting

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.

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.

Resetting the safety thermal cutout

DANGER: Electrocution
Do not attempt to reset the safety thermal cutout of this water heater unless the 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 has tripped, they must be reset manually.

Thermal safety cutouts

To reset the safety cutouts, follow the following procedure:

• Turn off all circuit breakers attached to the water heater
• Open the front cover of the water heater
• Identify the safety thermal cutouts on the top of the copper heating canisters. The buttons at the top are the reset buttons.
• Press down on the buttons, and 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.

TECHNICAL DATA

Tempra Trend

13. Technical Data

13.1 Tempra Trend

|
---|---
| Tempra Trend| 12| Tempra Trend| 15| Tempra Trend| 20| Tempra Trend3| 24| Tempra Trend4| 29| Tempra Trend5| 36
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

breakers1 (DP)

|

1 x 50 A

| |

2 x 30 A

| |

2 x 40 A

|

2 x 35 A

|

2 x 50 A

| |

3 x 40 A

|

3 x 35 A

|

3 x 50 A

|
Power connection| 1/N/GRD| | 2/GRD| | 2/GRD| | 2/GRD| | 3/GRD| | 3/GRD|
Min. recommended wire size (copper)2| 1 x 6/2 AWG| 2 x 10/2 AWG| 2 x 8/2 AWG| 2 x 6/2 AWG| 3 x 8/2 AWG| 3 x 6/2 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| 0.5 gpm| 0.5 gpm| 0.5 gpm| 0.77 gpm| 0.77 gpm
| (1.4 l/min)| (1.9 l/min)| (1.9 l/min)| (1.9 l/min)| (2.9 l/min)| (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| 14.52 in (369 mm)| | | | |
Width| 16.54 in (420 mm)| | | | |
Depth| 4.61 in (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 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. 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 Plus

Tempra 12 Plus| Tempra 15 Plus| Tempra 20

Plus

| Tempra 24

Plus3

| Tempra 29

Plus4

| Tempra 36

Plus5

---|---|---|---|---|---
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

breakers1 (DP)

| ****

1 x 50 A

| | ****

2 x 30 A

| | ****

2 x 40 A

| ****

2 x 35 A

| ****

2 x 50 A

| | ****

3 x 40 A

| ****

3 x 35 A

| ****

3 x 50 A

|
Power connection| 1/N/GRD| | 2/GRD| | 2/GRD| | 2/GRD| | 3/GRD| | 3/GRD|
Min. recommended wire size (copper)2| 1 x 6/2 AWG| 2 x 10/2 AWG| 2 x 8/2 AWG| 2 x 6/2 AWG| 3 x 8/2 AWG| 3 x 6/2 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| 0.5 gpm| 0.5 gpm| 0.5 gpm| 0.77 gpm| 0.77 gpm
| (1.4 l/min)| (1.9 l/min)| (1.9 l/min)| (1.9 l/min)| (2.9 l/min)| (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| 14.52 in (369 mm)| | | | |
Width| 16.54 in (420 mm)| | | | |
Depth| 4.61 in (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 must be used. Conductors should be sized to maintain a voltage drop of less than 3% under load.
3. 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 208V. Tempra 15 Plus, 20 Plus, 24Plus may be wired for unbalanced 3-phase 208V.

Temp. increase above ambient water temp.

Dimensions

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)

Wiring Diagrams

Tempra 12 Trend / Plus

Tempra 15, 20 Trend / Plus

Tempra 24 Trend / Plus

Tempra 29 Trend / Plus

Tempra 36 Trend / Plus

Spare parts

| Spare part No.|
---|---|---
1| 2| 3| | 4| 5| 6| 7
Housing| Temp. control knob| Wiring block| | Heating system| Safety thermal

cut out

| Electronic control

device

| Flow sensor
Tempra 12 Trend| 331894| 323686| 279998| | 286360| 286369| 286375| 332567
Tempra 15 Trend| 331894| 323686| 279997| | 286361| 286369| 286845| 332567
Tempra 20 Trend| 331894| 323686| 279997| | 286362| 286369| 286845| 332567
Tempra 24 Trend| 331894| 323686| 279997| | 286364| 286369| 286376| 332567
Tempra 29 Trend| 331894| 323686| 279996| | 286373| 286369| 286378| 332567
Tempra 36 Trend| 331894| 323686| 279996| | 286374| 286369| 286379| 332567
Tempra 12 Plus| 331926| 323686| 279998| | 286360| 286369| 286375| 332567
Tempra 15 Plus| 331926| 323686| 279997| | 286361| 286369| 286845| 332567
Tempra 20 Plus| 331926| 323686| 279997| | 286362| 286369| 286845| 332567
Tempra 24 Plus| 331926| 323686| 279997| | 286364| 286369| 286376| 332567
Tempra 29 Plus| 331926| 323686| 279996| | 286373| 286369| 286378| 332567
Tempra 36 Plus| 331926| 323686| 279996| | 286374| 286369| 286379| 332567
| | | | | | | |
| Spare part No.| | | | | | |
| 8| 9| 10| 11| 12| 13| 14| 15
Plumbing con- Advanced Flow Electronic Temperature Filter screen Set point case Inlet pipe Valve section 3/4″Control temp. control sensor elbow assembly
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| —| 280622
Tempra 15 Plus| 278698| 220502| 331934| 280677| 056755| 326141| —| 280622
Tempra 20 Plus| 278698| 220502| 331934| 280677| 056755| 326141| —| 280622
Tempra 24 Plus| 278698| 220502| 331934| 280677| 056755| 326141| —| 280622
Tempra 29 Plus| 278698| 220502| 331934| 280677| 056755| 326141| —| 280622
Tempra 36 Plus| 278698| 220502| 331934| 280677| 056755| 326141| —| 280622

Warranty

Subject to the terms and conditions outlined in this limited warranty, Stiebel Eltron, Inc. (the “Manufacturer”) hereby warrants to the original purchaser (the “Owner”) that each Tankless Electric Domestic Hot Water Heater (the “Heater”) shall not (i) leak due to defects in the Manufacturer’s materials or workmanship for seven (7) years from the date of purchase or (ii) fail due to defects in the Manufacturer’s materials or workmanship for three (3) years from the date of purchase. As the Owner’s sole and exclusive remedy for breach of the above warranty, the Manufacturer shall, at the Manufacturer’s discretion, send replacement parts for local repair; retrieve the unit for factory repair, or replace the defective Heater with a replacement unit with comparable operating features. The manufacturer’s maximum liability under all circumstances shall be limited to the Owner’s purchase price for the Heater.

This limited warranty shall be the exclusive warranty made by the Manufacturer and is made instead of all other warranties, express or implied, whether written or oral, including, but not limited to warranties of merchantability and fitness for a particular purpose. Manufacturer shall not be liable for incidental, consequential, or contingent damages or expenses arising directly or indirectly from any defect in the Heater or the use of the Heater. The manufacturer shall not be liable for any water damage or other damage to the property of the Owner arising, directly or indirectly, from any defect in the Heater or the use of the Heater. The manufacturer alone is authorized to make all warranties on the Manufacturer’s behalf and no statement, warranty or guarantee made by any other party shall be binding on the Manufacturer.

Manufacturer shall not be liable for any damage whatsoever relating to or caused by:

1. any misuse or neglect of the Heater, any accident to the Heater, any alteration of the Heater, or any other unintended use;

2. acts of God and circumstances over which the Manufacturer has no control over;
   The installation, electrical connection, and first operation of this appliance should be carried out by a qualified installer.
   The company does not accept liability for the failure of any goods supplied that have not been installed and operated per the manufacturer‘s instructions.
   Environment and recycling
   Please help us to protect the environment by disposing of the packaging following the national regulations for waste processing.

3. installation of the Heater other than as directed by the Manufacturer and other than per applicable building codes;

4. failure to maintain the Heater or to operate the Heater following the Manufacturer’s specifi cations;

5. operation of the Heater under fl fluctuating water pressure or in the event the Heater is supplied with non-potable water, for any duration;

6. improper installation and/or improper materials used by any installer and not relating to defects in parts or workmanship of Manufacturer;

7. moving the Heater from its original place of installation;

8. exposure to freezing conditions;

9. water quality issues such as corrosive water, hard water, and water contaminated with pollutants or additives;

Should the owner wish to return the Heater to the manufacturer for repair or replacement under this warranty, the Owner must first secure written authorization from the Manufacturer. The owner shall demonstrate proof of purchase, including a purchase date, and shall be responsible for all removal and transportation costs. If the Owner cannot demonstrate a purchase date this warranty shall be limited to the period beginning from the date of manufacture stamped on the Heater. The manufacturer reserves the right to deny warranty coverage upon the Manufacturer’s examination of the Heater. This warranty is restricted to the Owner and cannot be assigned.

Some States and Provinces do not allow the exclusion or limitation of certain warranties. In such cases, the limitations set forth herein may not apply to the Owner. In such cases, this warranty shall be limited to the shortest period and lowest damage amounts allowed by law. This warranty gives you specifi c legal rights and you may also have other rights which vary from State to State or Province to Province.

The owner shall be responsible for all labor and other charges incurred in the removal or repair of the Heater in the fi eld. Please also note that the Heater must be installed in such a manner that if any leak does occur, the fl ow of water from any leak will not damage the area in which it is installed.

This Warranty is valid for the U.S.A. & Canada only. Warranties may vary by country. Please consult your local Stiebel Eltron Representative for the Warranty for your country.

Frequently Asked Questions

How does the Stiebel Eltron 239222 Tankless Water Heater work?

The Stiebel Eltron 239222 Tankless Water Heater works by heating water on- demand as it passes through a heat exchanger, providing hot water whenever you need it without the need for a storage tank.

What is the maximum water flow rate for this model (239222)?

he maximum water flow rate for the Stiebel Eltron 239222 varies depending on the incoming water temperature and the desired output temperature, so it is recommended to refer to the unit's technical specifications for precise details.

What is the energy source for the Stiebel Eltron 239222 Tankless Water Heater?

The Stiebel Eltron 239222 Tankless Water Heater is typically powered by electricity.

Is this unit suitable for residential or commercial use?

The Stiebel Eltron 239222 is primarily designed for residential use.

What are the dimensions and weight of the Stiebel Eltron 239222 Tankless Water Heater?

The dimensions and weight can be found in the product's user manual or on the Stiebel Eltron website.

Can the temperature be adjusted on this model, and if so, how?

Yes, you can adjust the temperature on the Stiebel Eltron 239222 Tankless Water Heater using its controls or settings interface. Consult the user manual for specific instructions.

Does the Stiebel Eltron 239222 come with a warranty, and what does it cover?

The warranty terms and coverage may vary, so it's important to check the manufacturer's warranty information provided with the unit or on their official website.

What is the recommended maintenance schedule for this tankless water heater?

Maintenance recommendations can be found in the user manual, which typically includes information on cleaning filters, descaling, and regular checks.

Is professional installation required for the Stiebel Eltron 239222?

While some homeowners may choose to install it themselves if they have plumbing and electrical skills, professional installation is recommended to ensure proper setup and safety.

Can this unit be used in colder climates with freezing temperatures?

The suitability for freezing temperatures may depend on specific installation conditions and local climate. Consult the manufacturer or a professional installer for guidance in such situations.

What safety features does the Stiebel Eltron 239222 Tankless Water Heater include?

Safety features typically include overheat protection, flame failure detection, and pressure relief valves. Consult the product manual for a comprehensive list of safety features.

How long does it take to get hot water when using this tankless water heater?

The time it takes to get hot water depends on various factors, including the unit's capacity, flow rate, and the distance from the heater to the point of use. Generally, it provides hot water on demand.

Are replacement parts readily available for the Stiebel Eltron 239222?

Replacement parts are typically available through authorized service providers or dealers. Contact the manufacturer for information on where to source replacement parts.

Is there a recommended water quality or hardness level for optimal performance of this unit?

Water quality and hardness can impact the performance and lifespan of any water heater. Consult the user manual for recommendations on water quality and consider using water softeners if necessary.

Video  Tempra 24 Plus Video

Download this Manual PDFStiebel Eltron 239222 Tankless Water Heater Operational Manual 

Reference Link

Stiebel Eltron 239222 Tankless Water Heater Operational Manual- Device.report

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