Dometic 4443000399, Installation Manual

Page: 32 / 126

EN
Connecting the transport refrigeration system Frigo DC
30
9 Connecting the transport refrigeration
system
9.1 Standard tightening torques
A
Recommended tightening torques if no other tightening torque is specified:
9.2 Information about installing O-ring fittings
A
Proceed as illustrated (fig.
c
, page 8):
➤
Make sure that the O-ring ( 1 ) is sitting on the correct position on the fitting.
➤
Moisten the thread and the O-ring in the marked area ( 2 ) with the same refrig-
erant oil that is used in the refrigeration system.
➤
Fasten the related connection thread by hand.
➤
Tighten the connection with two spanners to the following tightening
torque:
NOTICE!
Do not exceed the specified tightening torque under any circumstances. This
is the only way to avoid unintentional loosening of screw connections or tear at
high loads, if the fasteners were tightened too tight.
M5
(0.80)
M6
(1.00)
M8
(1.25)
M10
(1.25)
M10
(1.50)
M12
(1.50)
M12
(1.75)
4 Nm to
6 Nm
8 Nm to
12 Nm
20 Nm to
30 Nm
40 Nm to
55 Nm
37 Nm to
52 Nm
70 Nm to
90 Nm
60 Nm to
85 Nm
5/8" 18 UNF 3/4" 16 UNF 7/8" 14 UNF 1" 14 UNS
2 Nm to 4 Nm 3 Nm to 5.5 Nm 4 Nm to 6 Nm 4 Nm to 6 Nm
NOTICE!
• Observe the specified tightening torques. A tightening torque that is too
high can damage the O-ring seat and cause leaks.
• Use two spanners when tightening or releasing a connection to prevent the
cables from twisting.
• Reusing O-rings is not permitted.
M5 (0.80) M6 (1.00) M8 (1.25)
4 Nm to 6 Nm 8 Nm to 12 Nm 20 Nm to 30 Nm
Frigo_DC-I-West.book Seite 30 Montag, 19. November 2018 12:09 12