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9.2.8 Ambient conditions
Operation under other ambient conditions has to
be agreed with the manufacturer.
Relative humidity [%]
Temperature
[
o
F]
long-term short-term
85
41 to 104
Tab. 23 Ambient conditions
9.2.9 Clearances for heat dissipation
Min. clearance
Type
fan hood - adjacent surface
[mm]
SM30B
SM55/75B
SM100B
SM200/250B
Tab. 24 Clearances for heat dissipation
9.2.10 Tightening torques
9.2.10.1 Screws and nuts
▶ Tighten the screws by means of a torque wrench.
Th e following values apply to new screws and nuts.
Size
Property class
M 8
8.8
M 10
8.8
M 12
8.8
Tab. 25 Tightening torques for screws and nuts
9.2.10.2 Screws in cast-iron casings
▶ Tighten the screws by means of a torque wrench.
Th e following values apply to new screws in cast-
iron casings (EN-GJL-250, CuZn).
Size
Property class
M 6
8.8
M 8
8.8
M 10
8.8
M 12
8.8
M 16
8.8
Tab. 26 Tightening torques for screws in cast-iron
casings
Set-up
altitude above
sea level [FT]
100
3280
1.4"
2.2"
Tightening torque
[Nm]
25
51
89
Tightening torque
[Nm]
8.5
12
25
40
90
30
255548 Rev.1
9.2.10.3 Stainless steel screws in stainless steel
casings
▶ Tighten the screws by means of a torque wrench.
Th e following values apply to new stainless steel
screws.
Size
Property class
M 6
M 8
M 10
M 12
M 16
Tab. 27 Tightening torques for stainless steel screws in
stainless steel casings
9.2.10.4 Screw plugs
Th e following values apply to new screw plugs
(steel, brass) in cast-iron casings (EN-GJL-250,
CuZn).
Size
G 1/8 A
G 1/4 A
G 3/8 A
G 1/2 A
G 3/4 A
G 1 A
Tab. 28 Tightening torques for screw plugs
Th e following values apply to new stainless steel
screw plugs in stainless steel casings.
Size
G 1/8 A
G 1/4 A
G 3/8 A
G 1/2 A
G 3/4 A
G 1 A
Tab. 29 Tightening torques for stainless steel screw
plugs in stainless steel casings
Tightening
torque [Nm]
A2/ A4
7.3
A2 /A4
17.5
A2/ A4
35
A2/ A4
60
A2/ A4
144
Tightening torque [Nm]
9
20
40
53
93
133
Tightening torque [Nm]
13
30
60
80
140
200
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