– 70 –
No.
Item
Explanation
Precaution for service
Possible failure
Corrective action (Remarks)
11
12
Installation
direction of
compressor
Tightening
torques of flare
nuts, general
bolts and nuts
•
The installation direction
of the compressor is
restricted.
•
Rain water is prevented
from entering the van,
and the refrigerating
capacity is prevented
from dropping.
In case of CR2211L-A
The installation directions
1
,
2
and
3
above are possible.
The direction
4
is impossible.
(observe the following tightening torques)
1. Standard tightening torques for flare
nuts
2. Tightening torques of general bolts
N·m (kgf·cm)
1. Compressor may be
damaged since liquid is
compressed at the start
because of liquid
accumulation.
1. Gas leaks on the
refrigerant piping system
2. General bolts and nuts
•
If overightened, the
bolt may break owing
to the excessive
elongation.
•
If insufficiently
tightened, looseness
may lead to troubles.
1. If the direction
4
in the
left is inevitably applied,
separately order the
compression on which
the discharge and suction
are reversed since it is
available for
replacement.
1. Periodically retighten the
bolt and nut, and check
that they are tightened to
the specified torques.
(Take sufficient care for
over tightening.)
Applicable
copper pipe
ø6.35
ø9.52
ø12.7
ø15.88
ø19.05
Tightening torque
N·m (kgf·cm)
9.8 ~ 19.6 (100 ~ 200)
19.6 ~ 29.4 (200 ~ 300)
29.4 ~ 39.2 (300 ~ 400)
39.2 ~ 49.0 (400 ~ 500)
49.0 ~ 58.8 (500 ~ 600)
Material
Head mark
Thread
diameter
M3
M4
M5
M6
M8
M10
M12
M14
M16
SS41C
No mark or 4
0.6 ~ 1.0
(6 ~ 10)
1.0 ~ 1.5
(10 ~ 15)
2.0 ~ 3.0
(20 ~ 30)
3.4 ~ 4.4
(35 ~ 45)
8.4 ~ 9.8
(86 ~ 100)
17.0 ~ 19.6
(173 ~ 200)
29.4 ~ 33.3
(300 ~ 340)
47.1 ~ 53.0
(480 ~ 540)
73.5 ~ 84.3
(750 ~ 860)
S45C
or 7
1.0 ~ 1.5
(10 ~ 15)
2.0 ~ 3.0
(20 ~ 30)
4.0 ~ 5.0
(40 ~ 50)
6.9 ~ 8.3
(70 ~ 85)
17.7 ~ 19.6
(180 ~ 200)
35.3 ~ 40.2
(360 ~ 410)
59.8 ~ 69.6
(610 ~ 710)
96.1 ~ 107.9
(980 ~ 1100)
156.9 ~ 176.5
(1600 ~ 1800)
SUS304
No mark
0.8 ~ 1.0
(8 ~ 10)
2.0 ~ 2.5
(20 ~ 25)
3.4 ~ 4.4
(35 ~ 45)
6.4 ~ 7.8
(65 ~ 80)
16.7 ~ 19.6
(170 ~ 200)
33.3 ~ 38.2
(340 ~ 390)
56.9 ~ 65.7
(580 ~ 670)
91.2 ~ 104.9
(930 ~ 1070)
142.2 ~ 165.7
(1450 ~ 1690)
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