Q: What are the different ECO modes of the SHZ 150 LCD and how do they work?

The Stiebel Eltron SHZ 150 LCD water heater offers three distinct ECO modes to adapt energy consumption to your needs. All modes automatically limit the set temperature to 60 °C and are accessible via the device's menu. ECO Comfort (default mode) - This mode ensures maximum hot water production while saving energy. If you set a temperature higher than 60 °C, the device automatically reduces it to 60 °C one week after commissioning or one week after a setting above 65 °C. The ECO symbol is displayed steadily on the LCD screen, without blinking. ECO Plus (enhanced savings mode) - Available only in single power mode. The heating element only activates when you have consumed about 40% of the tank volume , significantly reducing unnecessary heating cycles. The ECO symbol blinks on the screen. If you change the set temperature, the device automatically switches to ECO Comfort mode. ECO Dynamic (maximum efficiency) - Available only in single power mode. This mode analyzes your consumption habits for 7 days to optimize heating cycles according to your actual needs. After this learning period, the device allows withdrawal of up to 60% of the tank volume before automatically restarting heating. The ECO symbol blinks during the entire learning period and then during heating phases. This mode is optimal if you consume similar amounts of hot water at the same times each day. Common points for all ECO modes: The set temperature is always capped at 60 °C, all modes are adjusted via the menu, and the professional mode automatically disables all ECO functions. If the set temperature is changed in ECO Plus or ECO Dynamic mode, the device switches to ECO Comfort mode. All three modes operate only in single power mode.

Q: What does the flashing ECO symbol on the display in ECO3 (ECO Dynamic) mode of the SHZ 150 LCD mean?

The flashing ECO symbol on the display of your SHZ 150 LCD is a completely normal behavior when you activate the ECODynamic (ECO3) mode. This flashing simply indicates that the dynamic energy-saving mode is activated and that the device is functioning correctly. The SHZ 150 LCD has three distinct ECO modes, each with a different display: ECOComfort (fixed symbol), ECOPlus (flashing symbol), and ECODynamic (flashing symbol). In ECODynamic mode, the device immediately enters a learning phase and sets the target temperature to 60°C . For 7 full days , the device analyzes your consumption habits: the times you draw hot water and the quantities you use. During this learning phase, the water heater operates in ECOComfort mode while recording your data. The ECO symbol continues to flash, which is normal. After this week of analysis, the device automatically optimizes its operation based on your consumption profile. It allows you to draw up to 60% of the tank's capacity (90 liters for the SHZ 150) before restarting the heating. If you consume more than expected, the device detects the decrease and reheats the entire tank to 60°C to ensure your comfort. If your schedules or consumption quantities change over time, the device gradually adapts and automatically updates its optimization program. No action is required on your part: the ECODynamic mode manages the learning and continuous adaptation by itself. The flashing ECO symbol remains visible as long as you stay in ECO3 mode and serves as a simple visual indication of the active state of the mode.

Question 1

How to switch the boiler to summer mode (cooling)?

Accepted Answer

The summer mode (cooling) of the HSBC 300 L cool is activated via the WPM manager (Heat Pump Manager), which is the main controller of your heat pump. Unlike heating, cooling first requires the installation of an optional temperature probe and a configuration in the WPM.

Essential prerequisites:

You must have an optional surface cooling temperature probe (accessory to be ordered separately). Without this probe, the cooling mode cannot function.
The probe must already be installed on your system and connected to the T(KUE) terminal of the XD04 terminal of the device.
The system cools the rooms to a regulated temperature between 7 °C and 12 °C, according to your settings.

Activating the cooling mode:

Access the WPM manager (touch interface, control screen, or dedicated app depending on your installation).
Look for the “Cooling mode,” “Summer mode,” or “Cooling mode” function in the settings.
Toggle this mode to the active state (usually a switch or an “ON” option).
Check that the WPM correctly detects the T(KUE) probe; it should appear as “connected” or “active.”

If the cooling mode does not appear or is not available: Refer to the installation and usage manual of the WPM manager (provided separately with your controller). It contains the detailed settings specific to your WPM model. If the optional probe is not yet installed, contact your STIEBEL ELTRON installer to have it added and configured.

Question 2

What are the different ECO modes of the SHZ 150 LCD and how do they work?

Accepted Answer

The Stiebel Eltron SHZ 150 LCD water heater offers three distinct ECO modes to adapt energy consumption to your needs. All modes automatically limit the set temperature to 60 °C and are accessible via the device's menu.

ECO Comfort (default mode) - This mode ensures maximum hot water production while saving energy. If you set a temperature higher than 60 °C, the device automatically reduces it to 60 °C one week after commissioning or one week after a setting above 65 °C. The ECO symbol is displayed steadily on the LCD screen, without blinking.

ECO Plus (enhanced savings mode) - Available only in single power mode. The heating element only activates when you have consumed about 40% of the tank volume, significantly reducing unnecessary heating cycles. The ECO symbol blinks on the screen. If you change the set temperature, the device automatically switches to ECO Comfort mode.

ECO Dynamic (maximum efficiency) - Available only in single power mode. This mode analyzes your consumption habits for 7 days to optimize heating cycles according to your actual needs. After this learning period, the device allows withdrawal of up to 60% of the tank volume before automatically restarting heating. The ECO symbol blinks during the entire learning period and then during heating phases. This mode is optimal if you consume similar amounts of hot water at the same times each day.

Common points for all ECO modes: The set temperature is always capped at 60 °C, all modes are adjusted via the menu, and the professional mode automatically disables all ECO functions. If the set temperature is changed in ECO Plus or ECO Dynamic mode, the device switches to ECO Comfort mode. All three modes operate only in single power mode.

Question 3

What does the flashing ECO symbol on the display in ECO3 (ECO Dynamic) mode of the SHZ 150 LCD mean?

Accepted Answer

The flashing ECO symbol on the display of your SHZ 150 LCD is a completely normal behavior when you activate the ECODynamic (ECO3) mode. This flashing simply indicates that the dynamic energy-saving mode is activated and that the device is functioning correctly.

The SHZ 150 LCD has three distinct ECO modes, each with a different display: ECOComfort (fixed symbol), ECOPlus (flashing symbol), and ECODynamic (flashing symbol). In ECODynamic mode, the device immediately enters a learning phase and sets the target temperature to 60°C.

For 7 full days, the device analyzes your consumption habits: the times you draw hot water and the quantities you use. During this learning phase, the water heater operates in ECOComfort mode while recording your data. The ECO symbol continues to flash, which is normal.

After this week of analysis, the device automatically optimizes its operation based on your consumption profile. It allows you to draw up to 60% of the tank's capacity (90 liters for the SHZ 150) before restarting the heating. If you consume more than expected, the device detects the decrease and reheats the entire tank to 60°C to ensure your comfort.

If your schedules or consumption quantities change over time, the device gradually adapts and automatically updates its optimization program. No action is required on your part: the ECODynamic mode manages the learning and continuous adaptation by itself. The flashing ECO symbol remains visible as long as you stay in ECO3 mode and serves as a simple visual indication of the active state of the mode.

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