ASSEMBLY AND USER MANUAL
SOLAR BLOCK ULTRA
25
6.3.7.
Vacuum
Before loading the refrigerant fluid, it is essential to vacuum the installation. The vacuum is intended
to remove all air and moisture from the circuit.
The vacuum pump must be connected by means of pressure gauges to the suction line (rotolock valve
) and to the liquid line (access valve located after the expansion valve), in order to ensure that the
vacuum is carried out throughout the entire refrigeration circuit.
The vacuum time depends on the following factors:
•
Volume in m3/h of the vacuum pump;
•
Volume of the system piping;
On average, the minimum vacuum time to be carried out at an installation, depending on the system
installed, is shown in the table below.
Solar Block
6 ULTRA
12 ULTRA/
ULTRA PLUS
16 ULTRA/
ULTRA PLUS
32 ULTRA
Minimum vacum time (hours)
3
6
8
12
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.
After vacuuming, do not remove the hoses until the system is fully pressurized
by the refrigerant.
6.3.8.
Refrigerant load
R410a is an azeotropic mixture (fluid composed of more than one component). Because this is an
azeotropic fluid, care must be taken regarding the installation load. If we charge an installation with an
azeotropic refrigerant in the steam state, there is a risk that one of the components of the fluid will
vaporize before the others, and therefore, the installation will have a greater ratio of that component.
Therefore, the installation
must be carried out with the refrigerant in the liquid state
. Most containers
have a siphon, however it is a good idea to check it out.
To load liquid, proceed as shown in the figure below.
For proper operation of the SB ULTRA and SB ULTRA PLUS, the refrigerant loads mentioned in the
following table must be carried out.
Refrigerant charge from a
siphon bottle.
Refrigerant charge from a
non-siphon bottle.
