Instructions / Assembly

OPERATION
Settings
14 | Accelera® 220-300 E www.stiebel-eltron-usa.com
5.2 Settings
Menu
In standard display mode, the display shows the current amount
of mixed water.
Note
15seconds after every adjustment, the appliance auto-
matically switches back to the standard display and saves
the set value.
With the menu key, all information and
setting options are called up in sequence.
The relevant symbol appears with each
setting.
 "Mixed water volume" display
 "Actual temperature" display
 Set temperature 1
 Set temperature 2 (External signal transmitter)
 Changing units
 Charging level
 Fault code
 E fault code
5.2.1 Amount of mixed water display (standard display) 
The currently available amount of mixed
water at 104 °F (40 °C) when mixed with
59 °F (15 °C) cold water is shown.
If there is no usable hot water in the tank,
the display shows “--”.
DHW demand for Amount of mixed water at 104 °F (40 °C)
Bath 32–40 gal (120–150 l)
Shower 9–13 gal (30–50 l)
Hand washing ½–1½ gal (2–5 l)
The amount of mixed water that can be achieved depends on the
set point temperature.
5.2.2 Actual temperature display

In the mixed water menu, press the
menu key once to get to the actual tem-
perature menu.
The current actual temperature in
the upper section of the DHW tank is
shown. This largely corresponds to the
outlet temperature.
5.2.3 Set temperature1

Note
For reasons of legionella prevention, never set the DHW
temperature lower than 124 °F (50 °C).
Set temperature 1 is the default DHW temperature the appliance
heats to. Set temperature 1 is set to 131 °F (55 °C) at the factory.
Set temperature 1 is active if no external signal transmitter is
connected and active (See 5.2.5, “Set temperature2”, pg. 14)
In the actual temperature menu, press
the menu key once to get to the menu
for set temperature1.
The set temperature1 symbol appears.
Adjust set temperature1 from 69–149 °F
(20.5–65 °C) using the plus and minus
keys.
Note
Another way to adjust set temperature1 is to press the
plus or minus key when in standard display (amount of
mixed water).
5.2.4 Freeze protection
If the water temperature in the tank is below 59 °F (15 °C), the
heat pump and the electric element activate as a freeze protec-
tion measure. This mode deactivates once the water temperature
reaches 65 °F (18.3 °C).
If the set temperature is set to less than
69 °F (20.5 °C), only freeze protection re-
mains active. The water heater will not
run.
1
5.2.5 Set temperature2 
Note
For reasons of legionella prevention, never set the DHW
temperature lower than 124 °F (50 °C).
Set temperature2 is the DHW temperature to which the appliance
heats if an external signal transmitter is connected and active.
In the set temperature1 menu, press
the menu key once to get to the menu
for set temperature2.
The set temperature2 symbol appears.
Adjust set temperature2, from 69–
149 °F (20.5–65 °C) using the plus and
minus keys.