iNSTAllATiON
installation
20
| SHP-A 220-300 Plus
www.stiebel-eltron.com
10.4.3 Connection options: Operation with external signal
transmitter
!
Material losses
See "Permissible voltage range for external signal trans-
mitters" in the "Specification/data table" chapter.
Note
The appliance has a second, higher set temperature
which is selected at the factory. This is activated in the
event of an external switching signal. Set temperature 2
is higher ranking than the standard set temperature while
there is an external switching signal.
An external signal transmitter for switching a separate set DHW
temperature (set temperature 2) can be connected to terminal
X3/1-2. In the delivered condition, terminal X3/1-2 is not assigned.
If this terminal is connected at the voltage stated in the specifica-
tion (see “Permissible voltage range, external signal transmitter”)
(L to X3/1, N to X3/2), the appliance enables set temperature 2.
Following one-off activation (signal present for at least 1 minute),
set temperature 2 applies for at least 20 minutes. Set tempera-
ture 2 is ranked higher than set temperature 1. When the relevant
DHW set temperature has been reached, the compressor 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 from an external signal transmitter.
Example:
- Water temperature = 55 °C
- Set temperature 1 = 50 °C
- Set temperature 2 = 65 °C
A
1
0
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
t [min]
B
1
1
0
2
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
t [min]
D
00000
346
13
A External signal
B Compressor
1 20 min. minimum runtime, set temperature 2
2 20 min. minimum compressor idle time
f
f
Remove the appliance cover (see chapter “Cleaning and
maintenance / Removing the appliance cover”).
D
00000
56
08
3
1
2
1 Strain relief
2 Terminal X3
f
f
Prepare the electric cables in such a way that each cable ter-
minates with a wire ferrule.
f
f
Push the cables through one of the cable entries in the appli-
ance casing.
f
f
Route leads through the strain relief.
f
f
Connect the cables to X3.
Example 1 : Power supply utility signal with its own phase
X0
2
L
L
N
N
PE
PE
L
N
PE
GNYE
BU
BN
1
1
2
X3
2
3
3
1
1
2
L1 / L2 / L3
N
EVU
D
00000
59
15
4
EVU Power supply utility
BN Brown
BU Blue
GNYE Green/yellow
Example 2 : Photovoltaic signal via on-site relay and phase
routed outside the appliance
Note
The relay in the inverter must meet the following re-
quirements:
- Potential-free relay (240 V AC / 24 V DC, 1 A) with
N/O contact
- Adherence to safety regulations and standards for
safety extra low voltage
- The switching output must be programmed so that
the relay closes or opens if certain limits are exceed-
ed or undershot (inverter output level).
If necessary, check with the inverter manufacturer wheth-
er the product meets the stated criteria.
X0
2
L
L
N
N
PE
PE
L
N
PE
GNYE
BU
BN
1
1
2
1
X3
2
3
3
1
1
2
D
00000
59
15
5
1
Inverter (floating contact)
BN Brown
BU Blue
GNYE Green/yellow
