ABB PSTX370 Service Manual page 72

4. Remove brackets
1
Loosen (2x)
angle bracket from cooling tower.
2
Loosen (2x)
bolted bar from cooling tower.
3
Loosen screw that attach phase rail to cooling
tower (1x)
5. Remove screw-nuts and tension bars from
cooling tower
1
Loosen and remove (2x)
Screw-nut and the two spring washers from
cooling tower.
4
2
Remove the tension bar and the two torque
washers from cooling tower.
3
Remove the distance bar from cooling tower.
6. Remove heatsinks and SCR from cooling
tower
1
Remove the upper heatsink and upper SCR unit
by lifting them upwards from mounting screws.
2
Remove the middle heatsink and lower SCR
unit by lifting them upwards from mounting screws.
Do not remove the isolation plastic pipes from
mounting screws. Dispose of expended SCR.
WARNING
• SCR:s and heatsinks must be
handled with care to avoid scratches and other
marks.
• Do not scratch the contact surfaces with the
guide pins.
• Do not touch the contact surfaces.
• Do not lift the SCR by the wire.
• Ensure there is no damage to the welding flange
or to the contact surface.
7. Preparation of heatsink and SCR
• Clean all polished contact surfaces carefully with
Ethanol.
• Use well moistened lint-free paper.
• Avoid contact with surface.
• Lubricate directly after polishing/cleaning, within
5 minutes. The contact surfaces must be dry
before lubrication.
• Apply a couple of drops of silicone oil on the
cleaned contact surfaces, avoid getting oil in the
guide hole. Smooth the oil lightly over the whole
surface using lint-free paper. Then wipe off the
surface in order to get a very thin layer of oil.
• Avoid contact with the surfaces after lubrication.
Use the service kit in the spare part catalog
1SFC001013C0201.
Service PSTX470...570 | Service Manual |
72
Torx 30 M6x25 and remove the
Torx 30 M6x16 and remove the
Torx 30 M6x16.
Hexagon M10
1SFC13105M0201
4
1
3
5
1
6
1
2
7
1
Tx 30
M6 x 16
M6 x 25
2
4.7.1_4
Hexagon nut
M10
2
3
4.7.1_5
4.7.1_6
2
4.7.1_7