HTW ADMIRA FST3-140ADM Manuel De L'utilisateur Et D'installation page 69

CAUTION
Oil traps
If oil flows back into the outdoor unit's
compressor, this might cause liquid
compression or deterioration of oil return.
Oil traps in the rising gas piping can prevent
this.
An oil trap should be installed every 6m(20ft)
of vertical suction line riser.
Indoor unit/
Outdoor unit
Connection Instructions –
Refrigerant Piping
Step 1: Cut pipes
When preparing refrigerant pipes, take extra
care to cut and flare them properly. This will
ensure efficient operation and minimize the
need for future maintenance.
1. Measure the distance between the indoor
and outdoor units.
2. Using a pipe cutter, cut the pipe a little longer
than the measured distance.
3.
Indoor unit/
Outdoor unit
Step 2: Remove burrs
Burrs can affect the air-tight seal of refrigerant
piping connection. They must be completely
removed.
1.
2.
6m/20ft
Step 3: Flare pipe ends
Proper flaring is essential to achieve an airtight
seal.
1.
2.
3.
4. Remove PVC tape from ends of pipe when
28
Make sure that the pipe is cut at a perfect 90°
angle.
90°
Oblique Rough Warped
DO NOT DEFORM PIPE
WHILE CUTTING
Be extra careful not to damage, dent, or
deform the pipe while cutting. This will
drastically reduce the heating efficiency
of the unit.
Hold the pipe at a downward angle to prevent
burrs from falling into the pipe.
Using a reamer or deburring tool, remove all
burrs from the cut section of the pipe.
Pipe
Point down
After removing burrs from cut pipe, seal
the ends with PVC tape to prevent foreign
materials from entering the pipe.
Sheath the pipe with insulating material.
Place flare nuts on both ends of pipe. Make
sure they are facing in the right direction,
because you can't put them on or change
their direction after flaring.
Flare nut
Copper pipe
ready to perform flaring work.
Reamer