Sight Glasses; Screwed Joints Of Electrical Contacts In The Terminal Box; Screws Inside The Compressor - Bitzer HS.8551 Instructions De Service

Case C: Screws of property class 5.6
Case D: Screws of property class 8.8
They can be used for welding flanges as well.

10.3 Sight glasses

Also mind when mounting or replacing:
• Tighten sight glasses only with calibrated torque
spanner to indicated torque. Do not use a pneumatic
impact wrench.
• Tighten flanges of sight glasses in several steps to
indicated torque.
• Check sight glass visually in detail before and after
mounting.
• Test changed component for tightness.
Sight glasses with sealing flange
Screw size
M8
M10
Sight glasses with union nut
Size
1 3/4-12 UN
2 1/4-12 UN
AF: width across flats in mm
Screwed sight glass
Size
1 1/8-18 UNEF
10.4 Screwed joints of electrical contacts in the
terminal box
Size
M4
M5
M6
M8
M10
M12
M16
①: with thrust washer
26
14 Nm
18 Nm
AF
50 150 Nm
65 180 Nm
50 Nm
2 Nm
5 Nm
6 Nm
10 Nm
20 Nm
40 Nm ①
40 Nm ①

10.5 Screws inside the compressor

Set screws at shaft seals
Size
M5
M6
M8
Pressure relief valve
Size
3/4-14 NPTF
This valve vents from the pressure side (HP) to the
suction side (LP) inside the compressor if the HP pres-
sure exceeds the maximum allowable pressure.
3 .. 5 Nm
5 .. 9 Nm
10 Nm
15 .. 20 Nm
SB-110-3