Parker AC890 Product Manual page 94

Refer to Figure 5-2, page 5-11, for typical brake unit installation.
1. Remove the brake unit cover.
2. Remove the earth bonding bracket from the heatsink.
3. Loosen heatsink clamps.
4. Remove the heatsink/IGBT assembly and carefully place it on a clear flat surface - take care not to
damage the heatsink fins.
5. If retro-fitting the brake unit to an existing exhaust duct then: Remove the exhaust duct aperture cover
and screws. Transfer heatsink clamps and screws from shipping brake duct to existing drive duct.
6. Remove the drive's top front cover (plastic) via 2 off ¼ turn fasteners at top of drive.
7. Remove drive top cover which is attached via 4 off M5 screws on the side and 2 off M5 screws on the
top. Care should be taken to prevent the cover from falling into the drive and damaging the internal
components. If fitting a new exhaust duct assembly, fit the duct assembly in to the top panel and secure to
drive with 4 off M5 screws. Secure to the mounting panel with M8 fixings.
8. Install brake unit IGBT/heatsink assembly within exhaust duct and tighten clamps. Take care not to
damage components on the open PCB with handtools.
9. Connect brake unit control cable to the 14 way bulkhead connector at the top of the drive.
10. Secure the brake connecting plate(s) to the phase joining tabs of the drive top phase (M3/U) and the
phase joining tabs on the brake unit with M5 screws provided. Tighten to 4Nm (3ft/lbs).
11. Fit earth bonding bracket to heatsink and duct connection/earthing screws (M5) to exhaust duct. Tighten
to 4 Nm (3 ft-lb). NOTE - This connection must not be omitted as it is required for safety reasons.
12. Replace drive top cover, exercise care to not damage brake connection plates with the top cover as
this will compromise the electrical insulation. Tighten 4 off M5 screws on side of drive and 2 off M5
screws on top of cover to 2.5 Nm (1.84 ft-lb).
13. Replace drive front top cover with 2 off ¼ turn fasteners.
14. Fit brake unit cover with M6 captive washer nuts.
890SD (Standalone) Drive: Frame G, H & J
Associated Equipment
5-8
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