OMAS Air-Fi AFT7 Installer And User Instruction Manual page 12

2.4 PREPARING THE COOLING LINES:
- The cooling lines between the two units should be in
special copper pipes for cooling installation.
- Check the internal part of the pipes and eventually
remove dirt or dampness as they can interfere with
proper operation.
- The cooling lines should be singularly insulated with
polyurethane foam with closed cells.
- Plan the route of the pipeline to reduce the length and
the number of bends as much as possible for best
performance of the system. Always use a pipe folder.
- After having cut the connection pipes, eliminate the
slight defects by maintaining the
downward.
- For a correct flange operation, use a flange tool for
pipes and eliminate the eventual defects.
- Check that the flanges do not have any defect.
- Remove the connections located on the indoor unit. A
little quantity of air will be expelled to show the good
condition of the circuit.
- Screw and tighten the pipe union with manometric key
as per the following data:
OUTSIDE DIAMETER THIGHTENING COUPLE
mm Inch
ø 6,35
¼"
ø 9,52
"
3/8
During this operation keep the connections with
another key in order to avoid possible pipes twistin
Attention:
Check the flanging with the above mentioned
images.
If the section is not correct, cut it away and
proceed with another one.
pipe opening
Kg/m
1,8
4,2
g.
ENGLISH -11-
Not correct !
Correct !
Copper
tube