Refrigerant Piping - Acson international C Serie Installationshandbuch

Allowable Piping Length
When the pipe length becomes too long, both the capacity and reliability drop. As a result, compressor reliability will be
affected. Always choose the shortest path and follow the recommendation as tabulated below:
Indoor
Outdoor
Max. allowable length, m
Max. allowable elevation, m
Liquid pipe size, mm/(in)
Gas pipe size, mm/(in)
Additional charge of refrigerant, g/m
(for piping length above 7.5m)
Indoor
Outdoor
Max. allowable length, m
Max. allowable elevation, m
Liquid pipe size, mm/(in)
Gas pipe size, mm/(in)
Additional charge of refrigerant, g/m
(for piping length above 30m)
Piping Works And Flaring Technique
• Do not use contaminated or damaged copper tubing. If any
piping, evaporator or condenser had been exposed or had
been opened for 15 seconds or more, the system must be
vacuumed. Generally, do not remove plastic, rubber plugs
and brass nuts from the valves, fi ttings, tubings and coils
until it is ready for connection.
• If any brazing work is required, ensure that the nitrogen
gas is passed through piping and joints while the brazing
work is being done. This will eliminate soot formation on
the inside walls of the copper tubings.
• Cut the pipe stage by stage, advancing the blade of pipe
cutter slowly. Extra force and deep cut will cause more
distortion of pipe and therefore extra burr. See Fig. A
• Remove burrs from cut edges of pipes with a remover as
shown in Fig. B. This will avoid unevenness on the fl are
faces which will cause gas leak. Hold the pipe on top
position and burr remover at lower position to prevent metal
chips from entering the pipe.
Fig. A
Cutting Copper Tube
1/4t
Copper Tube

REFRIGERANT PIPING

5CCY10C/CR 5CCY15C/CR 5CCY20C/CR 5CCY25C/CR 5CCY28CR
5SLY10D/DR 5SLY15D/DR 5SLY20C/CR 5SLY25C/CR
15 15
10 10
6.35 6.35
(1/4") (1/4")
9.52 12.70
(3/8") (1/2")
20 20
5CCY38CR
5SLY40FR
75
30
9.52
(3/8")
15.88
(5/8")
50
• Insert the fl are nuts mounted on the connection parts of both
indoor and outdoor unit, into the copper pipes.
• The exact length of pipe protruding from the face of the
swaging block is determined by the fl aring tool. See Fig. C
• Fix the pipe fi rmly on the swaging block. Match the centers
of both the fl are die and the fl aring punch, and tighten fl aring
punch fully.
Piping Connection To The Units
• Align the center of the piping and suffi ciently tighten the
fl are nut with fi ngers. See Fig. D
• Finally, tighten the fl are nut with torque wrench until the
wrench clicks.
• When tightening the fl are nut with the torque wrench,
ensure that the direction for tightening follows the arrow
on the wrench.
• The refrigerant pipe connection are insulated by closed cell
polyurethane.
Ø Tube, D
Inch
1/4"
3/8"
1/2" 12.70
5/8" 15.88
3/4" 19.05
1-12
30
10
6.35
(1/4") (1/4")
12.70 15.88
(1/2") (5/8")
20
5CCY50CR
5SLY50FR
75
30
9.52
(3/8")
15.88
(5/8")
50
A (mm)
Imperial
mm
(Wing-nut Type)
6.35 1.3
9.52 1.6
1.9
2.2
2.5
5SLY28CR
30 50
10 30
6.35 9.52
(3/8")
15.88
(5/8")
20 50
5CCY60CR
5SLY60FR
75
30
9.52
(3/8")
15.88
(5/8")
50
Rigid
(Clutch Type)
0.7
1.0
1.3
1.7
2.0