Johnson AURUM R290 M Serie Guide D'utilisation page 71

2.8 Hydraulic module
4/6 kW unit without a backup heater
3
7
1
11
8
10
12
8 -16 kW unit without a backup heater
Code Name
Automatic air purge valve
1
2 Backup heater (optional)
3 Expansion vessel
4 Refrigerant gas pipe
Temperature sensor
5
Refrigerant liquid pipe
6
7
Flow switch
Pump
8
9 Plate heat exchanger
Water outlet pipe
10
Pressure relief valve
11
12
Water inlet pipe
5.1
9
5.2
Automatically removes the remaining air from the water loop.
Provides additional heating capacities when the heating capacity of the heat pump is
insufficient due to low outdoor temperature, and protects the external water pipes
from freezing.
Balances the water system's pressure.
Four temperature sensors determine the water and refrigerant temperature at various
points in the water loop: 5.1-TW_out, and 5.2-TW_in
Detects the water flow rate to protect the compressor and water pump in the event of
insufficient water flow.
Circulates water in the water loop.
Transfers heat from the refrigerant to the water.
Prevents excessive water pressure by opening when the pressure reaches 0.3 MPa(3 bar)
and discharging water from the water loop.
14
3
7
4
9
6
4/6 kW unit with a backup heater (optional)
3
7
4
9
6
8 -16 kW unit with a backup heater (optional)
Explanation
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/
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1
2
8
12
10
1
11
2
8
10
12
V.1