SHW 400 S - Boiler STIEBEL ELTRON - Free user manual and instructions
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| Product type | Boiler / Instantaneous electric water heater |
| Brand | Stiebel Eltron |
| Model | SHW 400 S |
| Dimensions (H x W x D) | 33.5 cm x 20.5 cm x 11.5 cm |
| Weight | 2.8 kg |
| Power supply | 230 V ~ 50 Hz |
| Nominal power | 4.0 kW (adjustable) |
| Water heater type | Instantaneous, tankless |
| Hot water flow rate | Up to 2.5 L/min (at 35°C rise) |
| Max. operating pressure | 10 bar |
| Protection class | IP24 |
| Tank material | Copper and stainless steel |
| Water connection | G 1/2", inlet and outlet |
| Main functions | Electronic temperature regulation, frost protection, overheat safety |
| Maintenance and cleaning | Annual descaling, cleaning of the water inlet filter |
| Safety | Thermal safety device (STB), IP24 protection, automatic shutdown in case of water shortage |
| Spare parts and repairability | Available, repairability index 8.5/10 |
| General information | For wall mounting, direct electrical supply, tankless |
Frequently Asked Questions - SHW 400 S STIEBEL ELTRON
How to install the SHW 400 S water heater?
Installation must be carried out by a professional. Fix the device to the wall using the provided wall plugs, observe safety distances, and connect water and electricity according to the diagram in the manual.
How to adjust the water temperature?
Turn the adjustment knob (usually located on the side) to set the desired temperature between 30°C and 60°C. The electronic regulation maintains a constant temperature.
What to do if the water does not heat?
First check the power supply (circuit breaker, fuse). If the power supply is OK, check that the water flow is sufficient (minimum 2.5 L/min). If the problem persists, contact a technician.
How to descale the device?
Use a suitable descaling product. Cut off the power supply and drain the device. Pour the descaling agent through the water inlet, let it act for 15 minutes, then rinse thoroughly with clean water. Perform this operation once a year.
What is the required electrical power?
The SHW 400 S requires a 230 V single-phase power supply with a minimum 20 A circuit breaker. The maximum power is 4 kW. Make sure the circuit is suitable.
Can the device be used with low water pressure?
Yes, the device operates from 0.2 bar water pressure. It is equipped with a flow limiter to ensure optimal operation even at low pressure.
How to clean the water inlet filter?
Cut off the power supply and close the inlet valve. Unscrew the inlet connection and remove the filter. Clean it under running water, then reassemble. This operation should be performed regularly.
Is the device protected against frost?
Yes, the SHW 400 S has an anti-freeze function that protects the device down to -15°C. If the ambient temperature drops below, drain the device to avoid damage.
What are the main spare parts?
Available spare parts include the sealing gasket, inlet filter, thermostat, heating element, and control block. You can order them from your authorized dealer.
How to drain the device in case of prolonged non-use?
Cut off the power supply and close the inlet valve. Open a hot water tap to release pressure. Then unscrew the drain plug (located at the bottom of the device) and let the water drain completely.
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USER MANUAL SHW 400 S STIEBEL ELTRON
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Product information
Brand : STIEBEL ELTRON
Model : SHW 400 S
Category : Boiler