STIEBEL ELTRON DHE 21 User Manual (English)

Other manuals for STIEBEL ELTRON DHE 21

Operation And Installation Instructions40 pages

Questions and Answers:

R
Robert KiddAug 9, 2025
How to fix insufficient flow in my STIEBEL ELTRON Water Heater?
- G
  Gregory TorresAug 9, 2025
  If you're experiencing insufficient flow from your STIEBEL ELTRON Water Heater, it could be due to several reasons. First, check if the ECO mode is activated (indicated by the 8 l/min symbol); if so, press the ECO push-button to deactivate it. Also, the shower head or rose might be blocked with limescale, requiring descaling or replacement. Another possible cause is dirt in the system, which would require a service engineer to clean the filter. If the inlet temperature is above 60 °C, a user or qualified installer should limit it to below 60 °C. Finally, the air detection system might be sensing air in the water, causing the heating power to switch off; in this case, the unit should return to normal operation shortly.
M
Michael MeyerAug 19, 2025
What to do if the ERROR symbol is continuously displayed on my STIEBEL ELTRON Water Heater?
- C
  cloweAug 19, 2025
  If the STIEBEL ELTRON Water Heater shows the ERROR symbol continuously, it indicates a malfunction in the control unit or unit communication. A service engineer should check the fuse in the domestic system.
C
Cory MackAug 29, 2025
What to do if the ERROR symbol appears only when running water on my STIEBEL ELTRON Water Heater?
- M
  Matthew FosterAug 29, 2025
  If the ERROR symbol is displayed on your STIEBEL ELTRON Water Heater only when water is running, the inlet temperature might be too high. The user or a qualified installer should limit the inlet temperature to below 60 °C.

STIEBEL ELTRON DHE 21 Specifications

General

Type	Electronic instantaneous water heater
Rated output	21 kW
Protection class	IP25
Energy efficiency class	A
Temperature range	60 °C
Power supply voltage	400 V
Dimensions	105 mm