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OPERATION
Settings and displays
6 | DEL Plus AU www.stiebel-eltron.com
4.5 Temperature limit Tmax (user)
The temperature limit allows you as a user to restrict the adjusta-
ble set temperature at the appliance to a maximum value.
Your qualified contractor can set an additional temperature limit
for anti-scalding protection. This temperature then dictates the
upper limit of the setting range for the temperature limit function.
4.5.1 Enabling the temperature limit
f Press and hold buttons "1" and "2" for longer than 5seconds,
until "Tmax" and the temperature display flash.
f Select a temperature limit.
10seconds after completing the setting, the menu item will dis-
appear automatically.
If the high limit safety cut-out is enabled, "Tmax" is continuously
displayed.
Check that the upper temperature limit has been correctly applied.
4.5.2 Disabling the temperature limit
f Disable the high limit safety cut-out by pressing and holding
buttons "1" and "2" for longer than 5seconds.
4.6 Allocating temperature memory buttons
Memory buttons "1" and "2" can each be assigned a required
temperature.
f Select the required temperature.
f To store the required temperature, press and hold button "1"
or "2" for longer than 3seconds. The selected temperature
flashes once to confirm.
4.7 Settings menu
Menu Description
Temperature display Select °C or °F
Operating lock Select ON or OFF. Symbol displayed
Fault code display Displays E1...E3 if there is a fault on the appli-
ance. Call qualified contractor.
f To call up the menu, press and hold the ECO button for
longer than 5seconds.
f To select, turn the temperature selector.
f Press the ECO button once more.
f To quit the menu, press and hold the ECO button for longer
than 5seconds.
The menu switches off automatically if no operation has been
performed for 30seconds.
Note
To call up the menu when the operating lock is enabled,
press and hold the ECO button for longer than 10seconds.
4.8 Selecting ECO level
ECO level Display Flow rate limitation
Level 1 8l/min (factory setting)
Level 2 7l/min
Level 3 6l/min
OFF No symbol No flow rate limit
f Briefly press the ECO button. Rolling selection, "Level1 - 3/
OFF".
4.9 Inlet temperature information
If the appliance is operated with preheated water and the inlet
temperature exceeds the selected temperature, the word "hot"
and the inlet temperature are displayed alternately, and the "hot"
LED flashes.
4.10 Recommended settings
Your instantaneous water heater offers maximum precision and
maximum convenience in DHW provision. Should you nonetheless
be operating the appliance with a thermostatic valve, we recom-
mend that you:
f Set the temperature at the instantaneous water heater to the
maximum temperature. Then set the required set tempera-
ture on the thermostatic valve.
Saving energy
The following recommended settings will result in the lowest en-
ergy consumption:
- 38°C for hand washbasins, showers, bath
- 50°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.
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 instantaneous water heater to the
maximum temperature.
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
removing the fuses/tripping the MCBs.
f Open the tap for one minute until the appliance and
its upstream cold water inlet line are free of air.
f Switch the power back ON.
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