Temperature Limit (Child-Proofing); Inlet Temperature Information; Following An Interruption To The Water Supply; Cleaning, Care And Maintenance - STIEBEL ELTRON DEL 21 SL electronic LCD Operation And Installation

OPERATION

Cleaning, care and maintenance

1 Set temperature setting range 30 - 60 °C (without end-stop)
35 °C to 43 °C in 0.5 °C increments, other temperature ranges
in 1 °C increments
2 Call up preferred temperatures
3 Set the temperature limit
Memory keys M1 and M2 can each be assigned a preferred tem-
perature.
f Select a preferred temperature. f
f Press one of the M keys for 3 seconds to save the preferred f
temperature . The temperature is confirmed with 1x flashing.
Note
!
If the outlet temperature is not sufficiently high when the
draw-off valve is fully open and the temperature selector
is set to maximum, then more water is flowing through
the appliance than can be heated by the heating system
(working at maximum output).
f Reduce the water volume at the draw-off valve until f
the required temperature delivery is achieved.
4.2

Temperature limit (child-proofing)

M1
The temperature limit can be individually set between 30 °C and
60 °C.
Enabling the temperature limit (child-proofing)
f Press and hold the Tmax key for > 6 seconds. The set value f
display flashes and the current temperature limit is shown.
f The value for the temperature limit can be changed while f
the display is flashing. If no key is pressed for 10 seconds,
the display stops flashing and the value is stored. The display
then shows the set value and the Tmax symbol.
Disabling the temperature limit (child-proofing)
f Press and hold the Tmax key for > 6 seconds. f
f The Tmax symbol on the display is no longer shown. f
4.3

Inlet temperature information

If the inlet temperature is higher than the preferred temperature,
e.g. if water has been preheated by solar energy, the display alter-
nates between showing "hot" and the measured inlet temperature.
The LED scalding risk indicator also flashes.
26 | DEL SL electronic LCD
M2
Tmax
Recommended setting for operation with a thermostatic valve
and water preheated by solar energy
f Set the temperature at the appliance to the max. f
temperature.
4.4

Following an interruption to the water supply

Material losses
!
Following an interruption of the water supply the appli-
ance must be recommissioned by carrying out the follow-
ing steps, in order to prevent the destruction of the bare
v
wire heating system.
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 mains power back ON again. 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/valves regularly. Limescale deposits at the f
spouts can be removed using commercially available descal-
ing agents.
6.

Troubleshooting

Fault Cause
The appliance will There is no voltage in the
not start despite the appliance.
DHW valve being
fully open.
The aerator in the tap or
the shower head is scaled
up or contaminated.
The water supply has been
interrupted.
Cold water flows The air sensor detects air
briefly while hot in the water and the ap-
water is being pliance's heating output is
drawn. briefly switched off.
The temperature at The child-proofing Tmax is
the appliance cannot enabled.
be set to > 43 °C.
The anti-scalding protec-
tion in the appliance is
enabled.
If you cannot remedy the fault, notify your qualified contractor.
To facilitate and speed up your enquiry, please provide the serial
number from the type plate (000000-0000-000000):
Remedy
Check the fuses/MCBs in
your fuse box.
Clean and/or descale the
aerator or shower head.
Vent the appliance and the
cold water inlet line (see
chapter "Settings / Follow-
ing an interruption to the
water supply").
The appliance restarts au-
tomatically after 1 minute.
Disable the child-proofing
(see chapter "Appliance
description")
Your qualified contractor
can disable the anti-scald-
ing protection for you.
DEL ... SL
No.: 000000-0000-000000
www.stiebel-eltron.com