Electronic Control Box; Back View; Front View - Airwell AW-WHPMA18-H93 Manual De Instalación

9.2.2 Hydraulic system diagram
Coding
Air purge valve
1
2
Expansion vessel
3 Circulation pump
Pressure relief valve
4
5 Manometer
6 Flow switch
Refrigerant gas connection
7
8 Refrigerant liquid connection
Plate heat exchanger
9
10 Water outlet connection
11
Water inlet connection
12.1 Electrical heating tape
Electrical heating tape
12.2
/ Temperature sensors

9.3 Electronic control box

Back view

Filter board
（PCB C）
Note:The picture is for reference only, please refer to the actual product.
Assembly unit
Remaining air in the water circuit will be automatically removes
air from the water circuit.
Balances water system pressure. (Expansion vessel volume: 8L)
Circulates water in the water circuit.
Prevents excessive water pressure by opening at 3 bar and
discharging water from the water circuit.
Provides water circuit pressure readout.
Detects water flow rate to protect compressor and water pump
in the event of insufficient water flow.
Transfer heat from the refrigerant to the water.
For heating plate heat exchanger
For heating connection pipe of expansion vessel
Four temperature sensors determine the water and refrigerant
temperature at various points in the water circuit.(T2B; T2; Tw_out; Tw_in)
Inverter module
（PCB A）
2
1
6
10
12.2
T2B
7 Tw_in
9
3
11
12.1
4
Tw_out
T2
5
8
Explaination
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Front view

22
Main control
board of unit
(PCB B)
Main control
board of
hydraulic module