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130
Installation Procedure - Piping Connection
1 - Piping size
S-AC-7-OUT
S-AC-8-OUT
S-AC-11-OUT
EQ3-9K
EQ3-12K
EQ3-9+12K
Liquid pipe ∅ 6.35 × 0.65 mm
Gas pipe ∅ 9.62 × 0.65 mm
S-AC-9-OUT
S-AC-10-OUT
EQ3-18K
EQ3-24K
Liquid pipe ∅ 6.35 × 0.65 mm
Gas pipe ∅ 12.7 × 0.7 mm
A
B
A
B
A
B
B
A1
B1
A2
B2
B1
B2
A3
A1
B1
A2
B2
A
B
A
B
A
B
B
A1
B1
A2
B2
B1
B2
A3
A1
B1
A2
B2
A
B
A
B
A
B
B
A1
B1
A2
B2
B1
B2
A3
A1
B1
A2
B2
• Install the removed flare nuts to the pipes to be
connected, then flare the pipes.
• Cut pipe • Remove burs • Insert the flare nut • Flare pipe
Correct Incorrect
Forced fastening without careful centering may damage
the threads and cause a leakage of gas.
Half union
Spanner
Indoor
unit
Indoor
unit
Indoor
unit
Oil trap
Outdoor unit
Outdoor unit Outdoor unit
Torque wrench
Flare nut
Liquid side 6,35 mm (1/4 ")
Liquid/Gas side 9,52 mm (3/8 ")
Be careful that matters, such as wastes of sands, water, etc. shall not enter the pipe.
CAUTION
The standard pipe length is Cm. If it is over D m, the function of the unit will be aected. If the pipe has to be lengthened,
the refrigerant should be charged, according to E g/m. But the charge of refrigerant must be conducted by professional
air conditioner engineer. Before adding additional refrigerant, perform air purging from the retrigerant pipes and indoor
unit using a vacuum pump,then charge additional refrigerant.
• Max. Elevation : Amax
• In case the elevation A is more than 5m, oil trap shoud be installed
every 5-7m
• Max. Length: Bmax
• Min. Length: Bmin
• In case the pipe length B is more than Dm, the refrigerant should be
charged, according to E g/m.
2 - Connection of pipes
• To bend a pipe, give the roundness as large as possible not to crush the pipe and the bending radius should be 30 to 40 mm or longer.
• Connecting the pipe of gas side first makes working easier.
• The connection pipe is specialized for R32.
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