1. Product Overview
The Stiebel Eltron Tempra Plus 29 kW is an advanced tankless electric water heater designed to provide continuous hot water. It features Self-Modulating Power Technology and Advanced Flow Control, ensuring a consistent temperature output even with varying hot water demands. This unit offers a compact design and does not require venting, making installation flexible.
Key Features:
- Proven reliability for consistent performance.
- No venting required, simplifying installation.
- Sleek design allows for installation in various locations.
- Energy-saving capabilities, potentially reducing the hot water portion of your electric bill by 15-20%.
- Self-Modulating Power Technology adjusts power consumption based on demand.
- Advanced Flow Control ensures stable temperature output by regulating water flow.
2. Setup and Installation
Proper installation is crucial for the safe and efficient operation of your Tempra Plus 29 kW water heater. It is highly recommended that installation be performed by a qualified electrician and plumber in accordance with all local and national codes.
Electrical Requirements:
The Tempra Plus 29 kW requires a robust electrical supply. Ensure your electrical panel can handle the following specifications:
- Voltage: 208/240 Volts
- Wattage: 21.6/28.8 kW
- Amperage: 3x35/3x40 Amps
- Minimum Required Circuit Breaker Size: 3x50 Amps
- Recommended Wire Size: 3 x 8 AWG
Plumbing Connections:
Connect the unit to your cold water supply and hot water distribution system. The cold water inlet includes a filter screen that requires periodic cleaning.
Figure 1: Comparison of Tempra and Tempra Plus models, highlighting the digital display and Advanced Flow Control of the Plus version. The Tempra Plus offers a digital display and Advanced Flow Control for enhanced temperature stability.
Figure 2: Sizing guide for Stiebel Eltron Tempra and Tempra Plus tankless water heaters. This guide illustrates the maximum flow rate from the unit and simultaneous fixtures supported based on ground water temperature and electrical service requirements. For the Tempra 29 Plus, it draws 120A and requires a minimum 200A electrical service.
Figure 3: Internal components of the Stiebel Eltron Tempra Plus water heater. Key components visible include the solid copper heating system, flow sensor, safety thermal cut-off, outlet and inlet temperature sensors, wiring block, and the Advanced Flow Control mechanism.
Installation Video:
Video 1: This video provides a general overview of the Stiebel Eltron Tempra series, including aspects relevant to the installation and benefits of tankless electric water heaters. While it references the Tempra 12, many principles apply across the Tempra range.
3. Operating Instructions
The Tempra Plus 29 kW is designed for user-friendly operation with precise temperature control.
Setting Water Temperature:
Utilize the convenient dial selector and digital temperature display on the front of the unit to set your desired output water temperature. The temperature can be adjusted between 86°F (30°C) and 125°F (52°C).
Self-Modulating Power Technology and Advanced Flow Control:
The unit automatically senses the water flow rate and temperature, calculating the exact power needed to maintain your set temperature. Advanced Flow Control further enhances this by automatically adjusting the flow of water to prevent unpleasant temperature fluctuations, ensuring a consistent hot water experience.
Figure 4: Front view of the Stiebel Eltron Tempra Plus tankless electric water heater. This image shows the unit's sleek design, digital temperature display, and the central dial for setting the desired water temperature.
4. Maintenance
Regular maintenance helps ensure the longevity and optimal performance of your water heater.
Filter Screen Cleaning:
The cold water inlet is equipped with a filter screen. It is recommended to inspect and clean this filter annually to prevent sediment buildup and maintain proper water flow. Refer to the detailed instructions in the full product manual for the cleaning procedure.
5. Troubleshooting
If you encounter any issues with your Tempra Plus 29 kW water heater, consider the following general troubleshooting steps:
- No Hot Water: Check the circuit breakers for the unit. Ensure the water supply is turned on.
- Inconsistent Temperature: Verify that the Advanced Flow Control is functioning correctly. Ensure the filter screen is clean.
- Low Water Flow: Inspect the cold water inlet filter screen for clogs.
For persistent problems, it is advisable to contact a qualified technician or Stiebel Eltron customer support.
6. Technical Specifications
| Feature | Specification |
|---|---|
| Brand | Stiebel Eltron |
| Model Number | Tempra 29 Plus |
| Special Features | Self-Modulating Power Technology, Advanced Flow Control, Proven reliability, Energy-saving up to 15-20% |
| Color | Gray |
| Wattage | 28.8 KW |
| Voltage | 220 Volts |
| Efficiency | High |
| Mounting Type | Wall |
| Item Depth | 4-5/8 inches |
| Item Weight | 10.37 pounds |
| Product Dimensions | 16.54 x 4.61 x 14.53 inches |
| Included Components | Water heater |
Figure 5: The compact size of the Tempra Plus water heater. This image shows a person holding the unit, illustrating that its dimensions are similar to a briefcase, emphasizing its space-saving design and ease of placement without requiring external venting.
7. Warranty and Support
Stiebel Eltron stands behind the quality of its products.
Warranty Information:
The Tempra Plus 29 kW comes with a 7-year warranty against leakage and a 3-year warranty on parts.
Customer Support:
For technical assistance, warranty claims, or any product-related inquiries, please visit the Stiebel Eltron Store or contact their official customer service channels.
