ASSEMBLY AND USER MANUAL
Combi [6 | 12 | 16] & Combi 12 HT
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Once the vacuum process has been completed, the taps of the vacuum pump are closed. The vacuum manometer
must always have the same display after stopping the pump, thereby ensuring that the installation maintains the
vacuum is ready start.
5.3.8.
Refrigerant R-407C (except Combi 12 HT)
The R-407C is a zeotropic mix (fluid comprising more than one component) made up of R32 (23%), R125 (25%)
and R134a (52%). It is chemically stable, is endowed with good thermodynamic properties and is a refrigerant with
a low environmental impact and very low toxicity.
As it is a zeotropic fluid, it is necessary to take care as regards the loading of the installation. If we load an installation
with a zeotropic refrigerant in vapour state, we run the risk that one of the components of the fluid will vaporize
before the others and hence the installation will have a greater proportion of this component.
This is why the installation must be loaded with the refrigerant in liquid state. The majority of R407c recipients have
a siphon, though it is worth checking. To load in liquid form you must proceed in the manner shown in the figure
below.
5.3.9.
Fluid Charge
The amount of fluid in each system essentially depends on two factors, the type of Combi System and the distance
between the Combi Block and the panels. So each system as the following pre-charge:
Combi
6
12 / 12 HT
16
Minimum load (kg)
1,6
2,0
2,5
The two hermetic valves (liquid and aspiration) are closed, so, before charging the system is necessary to open
the valves. The direction to open the valves is showned in the picture below.
Refrigerant Gas Loading from
Canister with Siphon
Refrigerant Gas Loading from
Canister without a Siphon
CLOSE
OPEN
