Installation Instructions

Appendix
42 Installation instructions aroTHERM 0020147164_04
D.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 exchanger
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)