Appendix
0020147164_07 aroTHERM Installation instructions
31
A.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 sensor
4
Expansion vessel (not for Vaillant)
5
Drain valve
6
Purging valve
7
Fan
8
Air inlet temperature sensor
9
Ribbed pipe heat exchanger
10
Temperature sensor of the ribbed pipe heat ex-
changer
11
4-way valve
12
Plate heat exchanger
13
Temperature sensor after the plate heat exchanger
14
Service valve for the high-pressure range of the
coolant circuit
15
High-pressure pressure switch in the coolant circuit
16
High-pressure sensor in the coolant circuit
17
Compressor outlet temperature sensor
18
Rotary piston compressor
19
Filter
20
Liquid separator
21
Electronic expansion valve
22
Compressor inlet temperature sensor
23
Service valve for the low-pressure range of the
coolant circuit
24
Filter
25
Gas buffer
26
Flow rate limiter (cooling mode)
