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Note: 1、The standard pipe length is 5m,When the length(L) of the connecting pipe is less than or
equals 7m,there is no need to add refrigerant. If the connecting pipe is longer than 7m,it is
required to add refrigerant,in the above table,the amounts of refrigerant to be added for the
models are listed for each additional meter of pipe length.
2、The pipe wall thickness shall be 0.5-1.0mm and the pipe wall shall be able to withstand the
pressure of 6.0MPa.
3、The longer the connecting pipe,the lower the cooling effect and the heating effect.
Flare nut
☆ When connect the pipe to the unit or backout it from the unit, please do use both spanner and
torque wrench. as shown in fig.3.
☆ When connect, smear both inside and outside of the flare nut with freeze motor oil, screw it by
hand and then tighten it with spanner.
☆ Refer to form 1 to check if the wrench had been tightened (too tight would mangle the nut and
lead leakage).
Diameter（Inch）
☆ Examine the connection pipe to see if it had gas leakage, then take the treatment of heat insulation,
as shown in the fig.3.
Smear freeze motoroil
here
Torque wrench
Spanner
Wiring interface
Form 1: The tightening torque needed for tightening nut
Surface thickness（mm）
φ1/4''
φ3/8''
φ1/2''
φ5/8''
φ3/4''
Median sponge (attachment)
(entwine the wiring interface
with seal mat)
Thread fasten(x4)
Gas collection tube
Liquid inlet tube
Fig.3
≥0.5
≥0.71
≥1
≥1
≥1
43
Heat preservation
sheath of liquid inlet
tube (attachment) (for
liquid tube)
Heat preservation
sheath of gas collection
tube (attachment)(for
gas tube)
Tightening torque (N.m)
15-30 (N·m)
30-40 (N·m)
45-50 (N·m)
60-65 (N·m)
70-75 (N·m)
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