10.3.3 Filler cock
When the filler cock is installed on the return pipe, remember to turn the strainer cover upwards in order to mini-
mise the amount of air that gets into the brine system when cleaning the filter.
Figure 44. Filler cock
Symbol explanation
3 Shut-off valve
4 Shut-off valve
5 Shut-off valve
6 Strainer
7 Shut-off valve
Figure 45. Filling the brine system
Symbol explanation
1 Brine in
2 Brine out
3 Shut-off valve (part of the filler cock)
4 Shut-off valve (part of the filler cock)
5 Shut-off valve (part of the filler cock)
6 Strainer (part of the filler cock)
7 Shut-off valve (part of the filler cock)
8 Safety valve 1.5 bar
9 Bleed and expansion tank
10 Shut-off valve
11 External pump
12 External container
1. Set the heat pump operating mode to "OFF" in the control computer menu INFORMATION -> OPERAT.
2. Mix water and anti-freeze in the correct proportions in an external container (12). Note that each pack must
be well mixed.
3. Check that the freezing point of the mixture is reached using a refractometer (-15°C for DHP-H, DHP-
C andDHP-L), (-32±1°C for DHP-A, DHP-AL).
4. Fill the system with the mixture using an external pump (11) which can bleed the brine pipes. Connect the
pressure side of the pump to the filler connection at valve (5).
5. For DHP-A, DHP-AL: open the defroster shunt in the control computer menu SERVICE -> MANUAL TEST ->
SHUNT DEFR, set the value to -.
6. Close valve (4).
7. Open valves (5) and (10).
8. Connect a transparent hose (3) that opens out into the external container (12).
9. Open valve (3).
10. Start the external pump (11) and fill the brine pipes.
11. Start the brine pump manually in the control computer menu SERVICE -> MANUAL TEST -> BRINEPUMP, set
the value to 1.
12. Run the brine pump and the external pump (11) in series until fluid, clear of air, comes out of the return
hose from the valve (3).
64 – Installation instructions VMBMA1002
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