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3 System overview
8 Installation instructions aroTHERM 0020147164_04
3 Fan
4 Compressor
5 Electronic expansion valve
6 Plate heat exchanger
3.3.3 Application limits
Operation of the pump outside the application limits results in
the heat pump being switched off by the internal control and
safety devices.
3.3.3.1 Application limits in heating mode (VWL
55/2 A 230 V)
60
50
70
40
30
20
10
0
-20 -10 0 10 20 30 40 50
[-15;22]
[-15;45]
[46;22]
[46;58]
[35;60]
[28;60]
[2;60]
[-10;55]
1
2
[28;22]
[35;22]
A
B
1 Heating mode application
limits
2 Hot water generation
application limits
A Water temperature
B Air temperature
3.3.3.2 Application limits in heating mode (VWL
85/2 A 230 V, VWL 115/2 A 230 V, VWL 155/2
A 230 V)
60
50
70
40
30
20
10
0
-20 -10 0 10 20 30 40 50
[-20;22]
[-20;43]
[46;22]
[46;58]
[35;63]
[28;63]
[2;63]
[-10;55]
1
2
[28;22]
[35;22]
A
B
1 Heating mode application
limits
2 Hot water generation
application limits
A Water temperature
B Air temperature
3.4 System diagram (VWL 55/2 A 230 V)
e
1 3 12161719
24
1521
14
11
4
23
20
2
22
5 13 8 9
6
7
10
A
B
18
1 Fan
2 Air inlet temperature
sensor
3 Ribbed pipe heat ex-
changer
4 Temperature sensor of
the ribbed pipe heat ex-
changer
5 4-way valve
6 Return heating circuit
temperature sensor
7 High-efficiency pump with
flow sensor
8 Purging valve
9 Flow heating circuit tem-
perature sensor
10 Drain valve
11 Plate heat exchanger
12 Temperature sensor after
the plate heat exchanger
13 Service valve for the high-
pressure range of the
coolant circuit
14 High-pressure pressure
switch in the coolant cir-
cuit
15 High-pressure sensor in
the coolant circuit
16 Compressor outlet temper-
ature sensor
17 Rotary piston compressor
18 Filter
19 Liquid separator
20 Electronic expansion valve
21 Compressor inlet temper-
ature sensor
22 Service valve for the low-
pressure range of the
coolant circuit
23 Filter
24 Fluid collector
A Heating return
B Heating flow
3.5 System diagram (VWL 85/2 A 230 V, VWL
115/2 A 230 V, VWL 155/2 A 230 V)
e
1 3 12161719
25
23
1521
14
11
4
24
20
2
22
5 13 8 9
6
7
10
A
B
18
1 Fan 2 Air inlet temperature
sensor
8


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