CLIVET CRISTALLO MM2-Y 27M Handbuch Für Installation Seite 59

Notions on refrigerant piping connection
6 NOTIONS ON REFRIGERANT PIPING CONNECTION
The length of the refrigerant pipes affects performance and energy efficiency of the unit. The nominal efficiency is tested
on units whose pipes are 5 meters long.
For tropical areas, the maximum length of the coolant pipe must not exceed 10 metres. Refer to the following table for
specifications on maximum pipe length and height difference
Max equivalent length
Max. height difference Outdoor unit / Indoor unit
6.1 Refrigerant piping connections
6.1.1 Cut the pipes
When preparing the coolant pipes, take great care to
cut and flare them correctly. This will ensure efficient
operation and reduce the need for further maintenance.
For units with R32 refrigerant, the pipe connection
points must be outside the room.
1 Measure the distance between the indoor and
outdoor unit.
2 Using a pipe cutter, cut the pipe to a measurement
slightly longer than the measured distance.
3 Check that the pipe is cut at an exact 90° angle. Refer
to the examples of incorrect cutting contained in "Fig.
14".
Oblique
90°
m
CAUTION
Do not damage, tighten or deform the pipe
during cutting. This would greatly reduce the
heating efficiency of the unit.
m
m
Irregular Corrugated
Fig. 14
27M 35M
25 25
±10 ±10
6.1.2 Eliminate smudges
Deburring can make the refrigerant piping connection
seal less effective. For this reason, they must be
eliminated completely.
1 Keep the pipe tilted downwards to prevent debris
residue from falling into the pipe.
2 Using a reamer or similar tool, remove all burrs from
the cut section of the pipe.
Tilt downward
m
CAUTION
Do not damage, tighten or deform the pipe
during cutting. This would greatly reduce the
heating efficiency of the unit.
53M 70M
30 50
±20 ±25
Pipe
Reamer
Fig. 15
25