18
INStALLAtION
•
Model 25 - 50
1
Gas line connection
2
Liquid line connection
3
Service connection
•
Model 35
1
Liquid line connection
2
Gas line connection
3
Service connection
1
2
3
1
2
3
Model
25
35
50
Refrigerant connections
Liquid line connection
Inches
1/4”
Gas line connection
Inches
3/8”
1/2”
Charge connection
Inches
1/2”
Liquid line connection
mm
6,35
Gas line connection
mm
9,52
12,7
Charge connection
mm
12,7
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
A
m
10
15
b
m
15
25
Maximum length with
standard charge
m
7
Additional charge
g/m
20
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 preconfi-
gured 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.
9
Use copper pipes for cooling systems.
9
Use connecting pipes and tools appropriate for the system's
refrigerant.
0
It is forbidden to use second-hand cooling lines since their
flare connection seal is not guaranteed.
0
It is forbidden to use pre-charged cooling lines.
0
It is forbidden to carry out welding operations with refrige-
rant inside the cooling circuit. If necessary, the refrigerant
must be recovered and the circuit must be cleaned with ni-
trogen without oxygen.
Connections
—
position the connecting pipes
OK
OK
OK
9
Plug the pipe ends in order to prevent water or debris from
flowing in.
9
before threading the lines through the hole in the wall, clo-
se the lines ends.
