Table of Contents
Advertisement
OPERATION
Settings
Adjust set temperature 1 from 69 to
149°F / 20.5 to 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).
Frost protection
If the set temperature is set to less than
69°F/20.5°C, only frost protection re-
mains active. The water heater will not
run.
4.2.4 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
regulates 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.
The display of set temperature 2 is de-
noted with an "N".
Adjust set temperature 2 from 69 to
149°F / 20.5 to 65°C) using the plus and
minus keys.
Operation with external signal transmitter (240 V input)
The connection of the heat pump to an external signal offers the
possibility of heating water to a raised temperature set point
during periods when electric rates are favorable, for example
during times when PV power is available or low tariff utility rates
are in effect.
The external signal may be offered by a PV system or low tariff
transmission of a utility.
This set temperature 2 is activated when a phase (LF signal) is
present at terminal X0/LF (See 10.3.1, "Connection with external
signal transmitter", pg. 21). While activated, set temperature 2
replaces the standard set DHW temperature ("set temperature 1").
If set temperature 2 has been activated by the external signal
transmitter, this set temperature will then be active for at least
20 minutes. If the signal remains active after those 20 minutes
passed, the compressor will run until the LF signal ends. If not,
the selected set temperature 1 is activated again.
www.stiebel-eltron-usa.com
If the relevant set DHW temperature is accomplished, the com-
pressor switches off and remains off for a minimum idle time of
20 minutes.
The following diagram illustrates the connections by means of a
sample signal sequence of an external signal transmitter.
Example:
- DHW temperature = 131°F /55°C)
- Set temperature 1 = 124°F/ 50°C)
- Set temperature 2 = 149°F /65°C)
A
1
0
0
5
10
15
20
25
30
35
B
1
0
0
5
10
15
20
25
30
35
A LF signal
B Compressor
1 20 min. minimum runtime, set temperature 2
2 20 min. minimum compressor idle time
Note
An LF signal must be active for at least 60 seconds before
the control unit responds to it. This prevents cycling of the
compressor due to fast changing sun radiation condition.
4.3
Calling up fault codes
Based on the set temperature 2 menu,
press the menu key once to get to the
fault code menu. A fault code will appear
if a fault has occurred. If no error has
occurred, this menu is not available.
See 6.1, "Fault codes", pg. 16 .
4.4
Rapid heating key
Press the rapid heating key.
The heat pump and electric booster ele-
ment symbols appear.
4.4.1 Comfort heating
Normally, the rapid heating key is used to activate the comfort
heating function, which enables the water heater to satisfy an
unexpectedly high DHW demand without changing any of the ap-
pliance's standard settings.
When comfort heating is activated by pressing the rapid heating
key, the heat pump and the electric booster element will start
in parallel, irrespective of the selected set temperature. To save
energy, the electric booster element switches off as soon as a
temperature of 149°F/65°C has been achieved in the upper tank
section (rapid heating).
40
45
50
55
60
65
70
75
t [min]
40
45
50
55
60
65
70
75
t [min]
Accelera® 220-300 E |
1
2
13
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
