Amazon V
Part 3 - S
yst
em Design and Ins
talla
tion
167
to facilitate the connection and rotation of the flare nut, ensure firm connection between the sealing surface
to facilitate the connection and rotation of the flare nut, ensure firm connection between the sealing surface
5.3.3 Expanding copper piping ends
Notes for installers
▪ Ends of copper piping can be expanded so that another length of piping can be inserted and the joint brazed.
▪ Insert the expanding head of the pipe expander into the pipe. After completing pipe expansion, rotate the copper
pipe a few degrees to rectify the straight line mark left by the expanding head.
Caution
▪ Ensure that the expanded section of piping is smooth and even. Remove any burrs that remain after cutting.
Figure3-5.1: Expanding copper piping ends
to facilitate the connection and rotation of the flare nut, ensure firm connection between the sealing surface
to facilitate the connection and rotation of the flare nut, ensure firm connection between the sealing surface
to facilitate the connection and rotation of the flare nut, ensure firm connection between the sealing surface
5.3.4 Flared joints
Flared joints should be used where a screw thread connection is required.
Notes for installers
▪ Before flaring 1/2H(half hard) piping, anneal the end of the pipe to be flared.
▪
Remember to place the flare nut on the piping before flaring.
▪ Ensure theflared openingis not cracked, deformed or scratched, otherwise it will not form a good seal and
refrigerant leakage may occur.
▪ The diameter of the flared opening should be within the ranges specified in Table 3-5.1. Refer to Figure 3-5.2.
Table 3-5.1: Flared opening size ranges
Figure 3-5.2: Flared opening
Pipe (mm)
Flared opening diameter (A) (mm)
to facilitate the connection and rotation of the flare nut, ensure firm connection between the sealing surface
Ф
6.35
8.7 - 9.1
Ф
9.53
12.8 - 13.2
Ф
12.7
16.2 - 16.6
Ф
15.9
19.3 - 19.7
Ф
19.1
23.6 - 24.0
▪ When connecting a flared joint, apply some compressor oil to the inner and outer surfaces of the flared opening
Содержание Amazon V
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