DC Inverter U-match Series for R410A Unitary Split Air Conditioner
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3.2.2.4 Connection Pipe of the Units
①. Connect the pipe to the unit. Please follow the instructions stated in the figures
below. Use both spanner and torque wrench.
②. When connecting the tapered screw nut, first apply chilled machine oil on its
inner and outer surface and then screw it up for 3~4 circles.
③. Confirm the tightening torque by referring to the following table (If the screw
nut is over-twisted, it may be damaged and cause leakage).
④. Check whether gas leakage occurs to the connection pipe and then apply
thermal insulation, as shown below.
⑤. Wind sponge around the joint of gas pipe and heat insulation sheath of gas
collecting pipe.
⑥. Be sure to connect gas pipe after liquid pipe is connected.
⑦. Be sure to have insulation for gas pipe. Insulation for liquid pipe is optional.
3.2.2.4.1 Solder Connection
Screw on the flare nut of the flaring connecting pipe on the outdoor unit valve.
3.2.2.4.2 Screw Connection
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