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7.2 - Hydraulic connections
The hydraulic module options are only compatible with closed heat transfer fluid loops.
The use of the hydraulic kit on open loop systems is prohibited.
Schematic diagram of the water circuit without the hydraulic module
17
16
23
16
Key
Components of the unit and hydraulic module
1
Screen filter (particle size of 1.2 mm)
2
Expansion tank (option)
3
Relief valve
4
Circulating pump (single or dual)
5
Air bleed
6
Water drain tap
7
Pressure sensor
Note: Provides pressure information for the pump inlet (see Control manual)
8
Temperature probe
Note: Provides temperature information for the water exchanger outlet (see Control manual)
9
Temperature probe
Note: Provides temperature information for the water exchanger inlet (see Control manual)
10
Pressure sensor
Note: Provides pressure information for the water exchanger outlet (see Control manual)
11
Check valve (if dual pump)
12
Plate heat exchanger
13
Heater or heat trace cable for frost protection (Option)
14
Water type heat exchanger flow rate sensor
15
Buffer Tank Module (Option)
30
19
16
23
25
19
22
16
Schematic diagram of the water circuit with the hydraulic module
21
18
20
19
19
24
19
22
21
18
21
18
20
19
14
T
21
8
2
13
Option
1
13
P
7
6
3
5
15
Option
13
25 25
13
6
23
System components
16
Pocket
17
Air bleed
18
Flexible connection
19
Shut-off valve
20
800 µm screen filter (Option - mandatory in the case of a unit without hydraulic module)
21
Pressure gauge
22
Water flow control valve
Note: not required if hydraulic module with variable speed pump
23
Charge valve
24
Bypass valve for frost protection (if shut-off valves are closed (item 19) during winter)
25
Buffer tank (if required)
----
Hydraulic module (unit with hydraulic module option)
Notes:
-
The system must be protected against frost.
-
The unit's hydraulic module and the water heat exchanger may be protected (factory-fitted
option) against freezing using electric heaters and heat trace cables (13)
-
The pressure sensors are assembled on connections without Schrader. Depressurise and drain the
system before any work.
12
13
T
9
13
6
5
12
13
T
11
9
4
P
T
8
10
6
13
13
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