Table of Contents
Advertisement
please adjust the flow speed of nitrogen by control valve according to the diameter of copper
pipe.
(4) For the unused branch pipelines, they should be sealed with copper tube to avoid leakage of
refrigerant in the system.
4.2.3 Precautions for the Installation of Connection Pipe
(1) Please comply with the following rules during pipe connection: Connection pipe should be as
short as possible, so is the height difference between indoor and outdoor units. Keep the pipe
bends as less as possible and the bend radius as large as possible.
(2) Install the connection pipes by welding. Please strictly follow the requirements for welding
process. Rosin joints, weak joints or pin holes are not allowed.
(3) When laying the pipe, be careful not to distort it. Radius of bending parts must be over 200mm
(7-7/8in.). Please do not bend or stretch the pipes frequently, otherwise the pipes will become
hard. A pipe shall not be bent or stretched for more than 3 times at the same position.
(4) Please use moment wrench to connection the union nut of mode exchanger. See below fig.
1) Aim the flared outlet of copper pipe at the center of screwed center, and then rotate the flared
nut with hand.
2) Use torque wrech to rotate the flared nut untill you hear a clicking sound.
3) Wrap the connection pipe (not insulated) and joint with sponge and then use plastic adhesive
tape to bundle it.
4) Support the connection pipe with bracket.
5) The degree of curvature of piping can't be too small, otherwise, the pipe may be broken.
Installer should use pipe bender to bend the pipe.
6) When connecting mode exchanger and connection pipe, do not pull the big joint and small
joint of mode exchanger forcibly. Otherwise, capillary or other pipes of mode exchanger may
be broken, which will lead to leakage.
Cooling and Heating Recovery Mode Exchanger
Fig. 4.20
Fig. 4.21
16
Advertisement
Table of Contents
