DH21100M - Chauffe-eau instantané et chaudière SIEMENS - Free user manual and instructions
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| Product Type | Instantaneous Water Heater and Boiler |
| Brand | Siemens |
| Model | DH21100M |
| Power Rating | 21 kW |
| Power Supply | 400 V / 3-phase |
| Dimensions (H x W x D) | 470 x 230 x 130 mm |
| Weight | 5.5 kg |
| Water Connection | G 1/2 inch |
| Minimum Flow Rate | 2.5 L/min |
| Maximum Flow Rate | 10 L/min (at ΔT 35°C) |
| Temperature Range | 30°C to 60°C |
| Energy Efficiency Class | A |
| Safety Features | Overheat protection, dry-run protection, safety cut-out |
| Control Type | Electronic with LED display |
| Installation | Wall-mounted, indoor use only |
| Maintenance | Annual descaling required; filter cleaning |
| Spare Parts Availability | Heating element, flow sensor, control board |
| Repairability Index | 7.5 / 10 |
Frequently Asked Questions - DH21100M SIEMENS
How do I install the Siemens DH21100M instant water heater?
Installation must be performed by a qualified professional. Ensure the device is mounted vertically on a sturdy wall. Connect the water supply (inlet and outlet) using G 1/2 fittings. Connect the power supply (400V 3-phase) through a dedicated circuit breaker. Follow the detailed instructions in the user manual.
What is the recommended flow rate for optimal performance?
The optimal flow rate is between 2.5 L/min and 10 L/min. Lower flow may cause the heater to cycle on/off, higher flow will reduce the temperature rise. Adjust the flow using the valve at the outlet.
How do I adjust the water temperature?
Use the electronic controls on the front panel. Press the arrow buttons to set the desired temperature between 30°C and 60°C. The LED display shows the set temperature. The device will automatically regulate power to maintain it.
Why is the water not getting hot enough?
Check if the flow rate is too high. Reduce the flow at the tap. Also verify that the power supply is adequate (400V 3-phase) and that the circuit breaker is not tripped. The inlet water temperature may be very cold in winter. The maximum temperature rise is 35°C at 10 L/min.
How often should I descale the water heater?
Descaling should be performed annually, or more frequently in hard water areas. Use a descaling solution approved for copper and stainless steel. Follow the procedure in the maintenance section of the manual.
What does the error code E1 mean?
Error code E1 typically indicates a problem with the flow sensor. The device is not detecting sufficient water flow. Check that the inlet filter is clean and the water supply is open. If the error persists, the flow sensor may need replacement.
Can I use the DH21100M with a solar water heating system?
Yes, it can be used as a booster for pre-heated water from solar panels. The device will heat the water to the set temperature if the solar preheat is insufficient. Ensure the inlet water temperature does not exceed 60°C.
Is the device suitable for multiple outlets simultaneously?
The DH21100M can supply one outlet at a time effectively. If used for multiple outlets (e.g., shower and kitchen), the flow rate split will reduce temperature rise. For simultaneous use, consider a larger model or reduce flow.
Where can I download the user manual?
The user manual is available for free download on notice-facile.com in PDF format. Search for Siemens DH21100M. You can also request a translated version by email.
What spare parts are available and how to order?
Common spare parts include the heating element, flow sensor, control board, and temperature sensor. Order from Siemens authorized dealers or online spare parts stores. Use the model number DH21100M for compatibility.
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