Appendix
0020147164_09 aroTHERM Installation instructions
27
B.2
Heat pump schematic drawing (VWL 85/2 A 230 V)
PZHH
-
TI
-
TCE
TI
-
TI
-
PT
-
TI
-
TI
-
TI
-
TI
-
7
9
8
23
22
18
15
16
17
14
12
6
1
4
5
13
19
21
24
10
25
11
20
+
2
26
3
1
Flow heating circuit temperature sensor
2
Return heating circuit temperature sensor
3
High-efficiency pump with flow rate sensor
4
Expansion vessel (not for Vaillant)
5
Drain valve
6
Purging valve
7
Fan
8
Air inlet temperature sensor
9
Finned-tube heat exchanger
10
Temperature sensor for the finned-tube heat ex-
changer
11
4-port valve
12
Plate heat exchanger
13
Temperature sensor after the plate heat exchanger
14
Service valve for the high-pressure range of the
refrigerant circuit
15
High-pressure pressure switch in the refrigerant
circuit
16
High-pressure sensor in the refrigerant circuit
17
Compressor outlet temperature sensor
18
Rotary compressor
19
Filter
20
Liquid separator
21
Electronic expansion valve
22
Compressor inlet temperature sensor
23
Service valve for the low-pressure area of the refri-
gerant circuit
24
Filter
25
Gas buffer
26
Flow rate limiter (cooling mode)
