Cleaning, Care And Maintenance; Troubleshooting - STIEBEL ELTRON DEL 18/21/24 Plus Operation And Installation

oPErATIoN

Cleaning, care and maintenance

Saving energy
The following recommended settings will result in the lowest en-
ergy consumption:
- 38 °C for hand washbasins, showers, bath
- 55 °C for kitchen sinks
Internal anti-scalding protection (qualified contractors)
If required, the qualified contractor can set a permanent temper-
ature limit, for example in nurseries, hospitals, etc.
When supplying a shower, the appliance temperature setting
range must be adjusted by the qualified contractor to 55 °C or less.
Limiting it in this way prevents water from flowing out of the
appliance at temperatures which could cause injury.
Recommended setting for operation with a thermostatic valve
and water preheated by solar energy
f Set the temperature at the appliance to the maximum f
temperature.
6.

Troubleshooting

Problem
The appliance will not start despite the
DHW valve being fully open.
When hot water is being drawn off, cold
water flows for a short period.
The required temperature cannot be set. The high limit safety cut-out and/or internal
The flow rate is too low.
No settings can be made on the program-
ming unit.
Note
After a power failure
Programming unit displays and selected settings are re-
tained following a power failure.
If you cannot remedy the fault, contact your qualified contractor.
To facilitate and speed up your request, provide the number from
the type plate (000000-0000-000000).
www.stiebel-eltron.com
Cause
There is no power.
The aerator in the tap or the shower head is
scaled up or dirty.
The water supply has been interrupted.
The air detector detects air in the water. It
switches off the heating output briefly.
anti-scalding protection are enabled.
ECO function is enabled.
The operating lock is enabled.
Following an interruption to the water supply
Material losses
!
To ensure that the bare wire heating system is not dam-
aged following an interruption to the water supply, the
appliance must be restarted by taking the following steps.
f Disconnect the appliance from the power supply by f
removing the fuses/tripping the MCBs.
f Open the tap for one minute until the appliance and f
its upstream cold water inlet line are free of air.
f Switch the power back ON. f
5. Cleaning, care and maintenance
f Never use abrasive or corrosive cleaning agents. A damp f
cloth is sufficient for cleaning the appliance.
f Check the taps regularly. Limescale deposits at the tap out- f
lets can be removed using commercially available descaling
agents.
remedy
Check the fuses/MCBs in your fuse box/distribution board.
Clean and/or descale the aerator or shower head.
Vent the appliance and the cold water inlet line.
The appliance restarts automatically after 1 minute.
Disable temperature limiting. The internal anti-scalding protection can
only be adjusted by the qualified contractor.
Select a different ECO level or disable the ECO function.
Press and hold the ECO button for more than 10 seconds to disable the
operating lock.
DEL Plus | 27