Refrigerant Piping
Connection
Page
23
Table 6.2
Permitted length
Piping
length
Total piping length
18K+18K 30/98’
L+Max
(L1, L2)
24K+24K
30K+30K
50/164’
(farthest distance from
the line pipe branch)
15/49’
L1, L2
(farthest distance from
the line pipe branch)
10/32.8’
L1-L2
Drop
height
Drop height between
indoor and outdoor unit
20/65.6’
H1
Drop height between
two indoor units
0.5/1.6’
H2
Refrigerant Piping Connection Instructions
CAUTION
•
The branching pipe must be installed
horizontally. An angle of more than 10° may
cause malfunction.
•
DO NOT
install the connecting pipe until
both indoor and outdoor units have been
installed.
•
Insulate both the gas and liquid piping to
prevent water leakage.
Step1: Cut pipes
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.
CAUTION
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.
1. Make sure that the pipe is cut at a perfect
90° angle. Refer to Fig. 6.4 for examples
of bad cuts
Oblique
Rough
Warped
90°
Fig. 6.4
Step2: Remove burrs.
Burrs can affect the air-tight seal of refrigerant
piping connection. They must be completely
removed.
1. Hold the pipe at a downward angle to
prevent burrs from falling into the pipe.
2. Using a reamer or deburring tool, remove
all burrs from the cut section of the pipe.
Pipe
Reamer
Point down
Fig. 6.5
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.
For R32/R290
refrigerantmodels, the pipe connection
points must be placed outside of room.
The connection pipes can not be reused.
Size of joint pipes for indoor or outdoor unit
Gas side
Size of main pipe(mm)
Liquid side
Φ9.52(0.37”)
Φ6.35(0.25”)
7K/9K
12K
Size of joint pipes for 410A unit
Table 6.3
CE-FQZHN-01C
Φ12.7(0.5”)
Φ15.9(0.626”)
Φ15.9(0.626”)
Φ9.52(0.375”)
18K
24K
30K/
36K
48K/
60K
CE-FQZHN-01C
CE-FQZHN-01C
Φ12.7(0.5”)
Φ6.35(0.25”)
CE-FQZHN-01C
Φ9.52(0.37”)
Φ6.35(0.25”)
Φ19(0.75”)
Φ9.52(0.375”)
CE-FQZHN-01C
Φ15.9(0.75”)
CE-FQZHN-01C
Φ19(0.75”)
Φ22(0.866”)
Φ9.52(0.375”)
or Φ12.7(0.5”)
Available
branching pipe
Model
CAUTION
Please select the connection pipe according
to the actual model.
