3
Piping Diagrams
HTW
-V5WD2N8 /
HTW
-V7WD2N8
Figure 2-3.1: HTW-V5(7)W/D2N8 piping diagram
Legend
1
Compressor
2
4-Way Valve
3
Gas-liquid separator
4
Air side heat exchanger
5
Electronic expansion Valve
6
Single-way electromagnetic valve
7
Liquid Tank
8
Strainer
9
Water Side Heat Exchanger
(Plate Heat Exchange)
10
Backup heater (optional)
11
Flow switch
12
Discharge gas sensor
13
Outdoor temperature sensor
14
Evaporation sensor in heating
(Condenser sensor in cooling)
15
Refrigerant inlet (liquid pipe) temp. sensor
16
Refrigerant outlet (gas pipe) temp. sensor
17
Water outlet temp. sensor
18
Water Inlet temp. sensor
19
Air purge valve
20
Expansion vessel
21
Circulating pump
22
Manometer
23
Safety valve
24
Y-shape filter
25
High Pressure Switch
26
Low Pressure Switch
27
Pressure valve
28
Capillary
29
Suction gas sensor
28
