Johnson Controls DHR18CSB21S, Installation And Maintenance Manual

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28
Table 3-2-1
Unit: mm (inch)
Item
Model
A B C D E
955
(37-5/8)
396
(15-5/8)
700
(27-1/2)
560
(22)
360
(14-1/8)
DHR18CSB21S
DHR24CSB21S
980
(38-5/8)
427
(16-3/4)
790
(31-1/8)
610
(24)
395
(15-1/2)
1107
(43-5/8)
440
(17-3/8)
1100
(43-1/4)
631
(24-7/8)
400
(15-3/4)
DHR30CSB21S
DHR36CSB21S
DHR42CSB21S
958
(37-3/4)
412
(16-1/4)
1349
(53-1/8)
572
(22-1/2)
376
(14-3/4)
DHR48CSB21S
4 .
REFRIGERATION PIPING WORK
4
.1 Refrigeration Piping Work Procedures and Caution in Connecting
4
.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
to ensure
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
4
.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