42
EN
Thickness of the copper pipes
In the split-system type air conditioning units with R410A refrigerant, a
three-way valve on the external unit is used, with a pin valve that has a dif-
ferent diameter from the R22 machines, in order to prevent the units from
accidentally being recharged with another type of refrigerant. In addition, to
increase resistance to pressure, for copper tubes with a nominal diameter
of 1/2” and 5/8”, the operating dimensions of the pipe connection as well
as the pipe unions on the opposite side were changed.
How to connect the pipes
- Remove the closing plugs from the piping only immediately before you-
make the connection: prevent all dirt and moisture from entering the piping.
- If a pipe is bent too many times, it becomes hard: do not bend the same-
section more than three times. Unwind the pipe without pulling on it, as
illustrated in the figure.
- The insulation around the copper pipes must be at least 6mm thick.
Connections to the internal unit
1. Shape the connection pipes well following the outline.
2. Remove the end cap from the pipes of the internal unit (check that no
impurities have been left inside).
3. Insert the pipe union and position the flange at the end of the connec-
tionpipe, following the instructions in the table.
4. Connect the pipes using two spanners, taking care not to damage the
piping. If the tightening force is insufficient, then there may well be leaks.
And if the tightening force is too much, then there may also be leaks as the
flange could be damaged. The safest method lies in tightening the connec-
tion using a fixed spanner and a dynamometric one: in this case, use the
table “tightening torque for flange connections”.
5. We recommend you leave an extra 50 cm of copper pipe for any subse-
quent work carried out in the vicinity of the cocks.
Connections to the external unit
Screw the pipe unions onto the external unit connections with the same
tightness as for the internal unit. To avoid leaks, pay particular attention to
the following points:
- Tighten the pipe unions, taking care not to damage the piping.
- If the tightening force is insufficient, then there may well be leaks. And if
the tightening force is too much, then there may also be leaks as the flan-
ge could be damaged.
- The safest method lies in tightening the connection using a dynamo-
metric spanner: in this case, use the following table.
8. PIPING AND CONNECTIONS
24
dynamometric
spanner
YES
NO
2.6 How to connect the pipes
·
Remove the closing plugs from the piping only immediately before you
make the connection: prevent all dirt and moisture from entering the
piping.
· If a pipe is bent too many times, it becomes hard: do not bend the same
section more than three times. Unwind the pipe without pulling on it, as illu-
strated in the figure.
· The insulation around the copper pipes must be at least 6 mm thick.
pipe
unions
connection piping
gas cock
liquid cock
2.8 Connections to the external unit
Screw the pipe unions onto the external unit connections with the same tight-
ness as for the internal unit.
To avoid leaks, pay particular attention to the following points:
·
Tighten the pipe unions, taking care not to damage the piping.
·
If the tightening force is insufficient, then there may well be leaks.
And if the tightening force is too much, then there may also be leaks as the
flange could be damaged.
·
The safest method lies in tightening the connection using a dynamo-
metric spanner: in this case, use the following table.
2.5 Thickness of the copper pipes
2.7 Connections to the internal unit
1. Shape the connection pipes well following the outline.
2. Remove the end cap from the pipes of the internal unit (check that no
impurities have been left inside).
3. Insert the pipe union and position the flange at the end of the connection
pipe, following the instructions in the table.
4. Connect the pipes using two spanners, taking care not to damage the
piping. If the tightening force is insufficient, then there may well be leaks.
And if the tightening force is too much, then there may also be leaks as the
flange could be damaged. The safest method lies in tightening the con-
nection using a fixed spanner and a dynamometric one: in this case, use
the table “tightening torque for flange connections”.
5. We recommend you leave an extra 50 cm of copper pipe for any subse-
quent work carried out in the vicinity of the cocks.
NOMINAL DIAMETER
EXTERNAL DIAMETER
THICKNESS
(inches)
(mm)
(mm)
1/4
6,35
0,8
3/8
9,52
0,8
1/2
12,70
0,8
5/8
15,88
1,0
In the split-system type air conditioning units with R410A refrigerant, a three-
way valve on the external unit is used, with a pin valve that has a different
diameter from the R22 machines, in order to prevent the units from acciden-
tally being recharged with another type of refrigerant.
In addition, to increase resistance to pressure, for copper tubes with a nomi-
nal diameter of 1/2” and 5/8”, the operating dimensions of the pipe connec-
tion as well as the pipe unions on the opposite side were changed.
ø
ø
mm
MEASUREMENT
CONVENTIONAL
NOMINAL
EXTERNAL
THICKNESS
“A” mm clamp-shaped
PIPE VICE
PIPE VICE for R410A
clamp-shaped
butterfly
1/4
6,35
0,8
0-0,5
1,0-1,5
1,5-2,0
3/8
9,52
0,8
0-0,5
1,0-1,5
1,5-2,0
1/2
12,70
0,8
0-0,5
1,0-1,5
2,0-2,5
5/8
15,88
1,0
0-0,5
1,0-1,5
2,0-2,5
CD
BA
43°~ 45°
45°~ 46°
24
dynamometric
spanner
YES
NO
2.6 How to connect the pipes
·
Remove the closing plugs from the piping only immediately before you
make the connection: prevent all dirt and moisture from entering the
piping.
· If a pipe is bent too many times, it becomes hard: do not bend the same
section more than three times. Unwind the pipe without pulling on it, as illu-
strated in the figure.
· The insulation around the copper pipes must be at least 6 mm thick.
pipe
unions
connection piping
gas cock
liquid cock
2.8 Connections to the external unit
Screw the pipe unions onto the external unit connections with the same tight-
ness as for the internal unit.
To avoid leaks, pay particular attention to the following points:
·
Tighten the pipe unions, taking care not to damage the piping.
·
If the tightening force is insufficient, then there may well be leaks.
And if the tightening force is too much, then there may also be leaks as the
flange could be damaged.
·
The safest method lies in tightening the connection using a dynamo-
metric spanner: in this case, use the following table.
2.5 Thickness of the copper pipes
2.7 Connections to the internal unit
1. Shape the connection pipes well following the outline.
2. Remove the end cap from the pipes of the internal unit (check that no
impurities have been left inside).
3. Insert the pipe union and position the flange at the end of the connection
pipe, following the instructions in the table.
4. Connect the pipes using two spanners, taking care not to damage the
piping. If the tightening force is insufficient, then there may well be leaks.
And if the tightening force is too much, then there may also be leaks as the
flange could be damaged. The safest method lies in tightening the con-
nection using a fixed spanner and a dynamometric one: in this case, use
the table “tightening torque for flange connections”.
5. We recommend you leave an extra 50 cm of copper pipe for any subse-
quent work carried out in the vicinity of the cocks.
NOMINAL DIAMETER
EXTERNAL DIAMETER
THICKNESS
(inches)
(mm)
(mm)
1/4
6,35
0,8
3/8
9,52
0,8
1/2
12,70
0,8
5/8
15,88
1,0
In the split-system type air conditioning units with R410A refrigerant, a three-
way valve on the external unit is used, with a pin valve that has a different
diameter from the R22 machines, in order to prevent the units from acciden-
tally being recharged with another type of refrigerant.
In addition, to increase resistance to pressure, for copper tubes with a nomi-
nal diameter of 1/2” and 5/8”, the operating dimensions of the pipe connec-
tion as well as the pipe unions on the opposite side were changed.
ø
ø
mm
MEASUREMENT
CONVENTIONAL
NOMINAL
EXTERNAL
THICKNESS
“A” mm clamp-shaped
PIPE VICE
PIPE VICE for R410A
clamp-shaped
butterfly
1/4
6,35
0,8
0-0,5
1,0-1,5
1,5-2,0
3/8
9,52
0,8
0-0,5
1,0-1,5
1,5-2,0
1/2
12,70
0,8
0-0,5
1,0-1,5
2,0-2,5
5/8
15,88
1,0
0-0,5
1,0-1,5
2,0-2,5
CD
BA
43°~ 45°
45°~ 46°
24
dynamometric
spanner
YES
NO
2.6 How to connect the pipes
·
Remove the closing plugs from the piping only immediately before you
make the connection: prevent all dirt and moisture from entering the
piping.
· If a pipe is bent too many times, it becomes hard: do not bend the same
section more than three times. Unwind the pipe without pulling on it, as illu-
strated in the figure.
· The insulation around the copper pipes must be at least 6 mm thick.
pipe
unions
connection piping
gas cock
liquid cock
2.8 Connections to the external unit
Screw the pipe unions onto the external unit connections with the same tight-
ness as for the internal unit.
To avoid leaks, pay particular attention to the following points:
·
Tighten the pipe unions, taking care not to damage the piping.
·
If the tightening force is insufficient, then there may well be leaks.
And if the tightening force is too much, then there may also be leaks as the
flange could be damaged.
·
The safest method lies in tightening the connection using a dynamo-
metric spanner: in this case, use the following table.
2.5 Thickness of the copper pipes
2.7 Connections to the internal unit
1. Shape the connection pipes well following the outline.
2. Remove the end cap from the pipes of the internal unit (check that no
impurities have been left inside).
3. Insert the pipe union and position the flange at the end of the connection
pipe, following the instructions in the table.
4. Connect the pipes using two spanners, taking care not to damage the
piping. If the tightening force is insufficient, then there may well be leaks.
And if the tightening force is too much, then there may also be leaks as the
flange could be damaged. The safest method lies in tightening the con-
nection using a fixed spanner and a dynamometric one: in this case, use
the table “tightening torque for flange connections”.
5. We recommend you leave an extra 50 cm of copper pipe for any subse-
quent work carried out in the vicinity of the cocks.
NOMINAL DIAMETER
EXTERNAL DIAMETER
THICKNESS
(inches)
(mm)
(mm)
1/4
6,35
0,8
3/8
9,52
0,8
1/2
12,70
0,8
5/8
15,88
1,0
In the split-system type air conditioning units with R410A refrigerant, a three-
way valve on the external unit is used, with a pin valve that has a different
diameter from the R22 machines, in order to prevent the units from acciden-
tally being recharged with another type of refrigerant.
In addition, to increase resistance to pressure, for copper tubes with a nomi-
nal diameter of 1/2” and 5/8”, the operating dimensions of the pipe connec-
tion as well as the pipe unions on the opposite side were changed.
ø
ø
mm
MEASUREMENT
CONVENTIONAL
NOMINAL
EXTERNAL
THICKNESS
“A” mm clamp-shaped
PIPE VICE
PIPE VICE for R410A
clamp-shaped
butterfly
1/4
6,35
0,8
0-0,5
1,0-1,5
1,5-2,0
3/8
9,52
0,8
0-0,5
1,0-1,5
1,5-2,0
1/2
12,70
0,8
0-0,5
1,0-1,5
2,0-2,5
5/8
15,88
1,0
0-0,5
1,0-1,5
2,0-2,5
CD
BA
43°~ 45°
45°~ 46°
Summary of Contents for PS09 18HI
Page 70: ......
