Riello AARIA START - Installation on Old Systems or Systems in Need of Upgrading; Refrigerating Connection

INSTALLATION
14
2.9 Installation on old systems or systems in need
of upgrading
When R AARIA START is installed on old systems or systems in
need of upgrading, it is recommended to ensure that:
— the electrical system is compliant with the applicable reg-
ulations and has been installed by qualified professionals
9
In the event of a replacement, the system must be inspected
by the designer or by another competent person, and must
be compliant with the technical requirements, as well as
the current legislations and regulations.
9
The manufacturer shall bear no responsibility for any dam-
ages caused by incorrect system installation.
2.10 Refrigerating connection
The dimensions and positions of R AARIA START cooling con-
nections are shown hereunder.
MODEL 25 - 35
1 Gas line connection
2 Service connection
3 Liquid line connection
1
2
3
MODEL 50 - 70
1 Gas line connection
2 Liquid line connection
3 Service connection
1
2
3
1
2
3
50 70
Model 25 35 50 70
Connections
Liquid line connection 1/4 Pollici
Gas line connection 3/8 1/2 Pollici
Charge connection 1/2 Pollici
Liquid line connection 6,35 mm
Gas line connection 9,52 12,7 mm
Charge connection 12,7 mm
To access the cooling connections:
— unscrew the fastening screw
— push down the connection covering panel
— remove the connection covering panel
The cooling pipes must respect the lengths and differences in
height as indicated in the following table.
A
B
A
B
Model 25 35 50 70
A 10 15 m
B 15 25 m
Maximum length with
standard charge
7 m
Additional charge 20 g/m
Use pipes with the thickness indicated in the following table:
Pipe Ø Thickness
mm inches mm
6,35 1/4 0,8
9,52 3/8 0,8
12,70 1/2 0,8
15,88 5/8 1,0
Maximum operating pressure 4.3 Mpa.
9
In case of a drop in excess of 5 m, a siphon must be installed
every 5-7 metres.
9
The given measures are the maximum permitted values.
9
Cooling connections featuring shut-off valves are preconfig-
ured for flare connections.
9
Cooling lines must be as straight as possible and any neces-
sary bends must have a radius grater than 40 mm.
9
Use clean hoses. Make sure the inside is free of dust, resi-
dues, water.
9
Avoid the entry of uncondensable gases (air) in the circuit,
otherwise, with the unit in operation, high pressures with
the risk of damages might ensue.