Gree GUHD18ND3FO - Refrigeration Piping Work; Refrigeration Piping Work Procedures and Caution in Connecting

U-Match Series DC Inverter Service Manual
80
Table 3-2-1
Unit: mm (inch)
Item
Model
A
B
C
D
E
GUHD18ND3FO
955
(37-5/8)
396
(15-5/8)
700
(27-1/2)
560
(22)
360
(14-1/8)
GUHD24ND3FO
980
(38-5/8)
427
(16-3/4)
790
(31-1/8)
610
(24)
395
(15-1/2)
GUHD30ND3FO
GUHD36ND3FO
1107
(43-5/8)
440
(17-3/8)
1100
(43-1/4)
631
(24-7/8)
400
(15-3/4)
GUHD42ND3FO
958
(37-3/4)
412
(16-1/4)
1349
(53-1/8)
572
(22-1/2)
376
(14-3/4)
GUHD48ND3FO
3 REFRIGERATION PIPING WORK
3.1 Refrigeration Piping Work Procedures and Caution in Connecting
3.1.1 Flare Processing
(1) Cut the connection pipe with the pipe cutter and remove the burrs.
(2) Hold the pipe downward to prevent cuttings from entering the pipe.
(3) Remove the flare nuts at the stop valve of the outdoor unit and inside the accessory bag of the
indoor unit, then insert them to the connection pipe, after that, flare the connection pipe with a
flaring tool.
(4) Check if the flare part is spread evenly and there are no cracks (see Figure 3-3-1).
d2
d1
d1
d2
90°±1°
Figure 3-3-1
3.1.2 Bending Pipes
(1) The pipes are shaped by your hands. Be careful not to collapse them.
Extend the pipe by unwinding it
√
×
Figure 3-3-2
(2) Do not bend the pipes in an angle more than 90°.
(3) When pipes are repeatedly bent or stretched, the material will harden, making it difficult to bend or