Xylem IM167 R8 Aquavar CPC (Centrifugal Pump Control) - Manual (Page 39)

39
Maintenance
This section describes the procedure for separating the drive and extension modules, which is
required to provide service access to the drive module.
Safety
WARNING! Read “Safety” on the first pages of this manual before performing any
maintenance on the equipment. Ignoring the safety instructions can cause injury or
death. Note: There are parts carrying dangerous voltages near the OMIO board when the
drive is powered.
Separating the Drive and Extension Modules
The drive module is mounted on a trolley that straddles a pedestal. The following procedure
removes mechanical connections so that the drive module and trolley can roll forward for
service access.
1. Disconnect all power sources from the drive/extension modules
and wait at least 5 minutes for internal capacitors to fully
discharge.
2. Remove all front covers from the drive module.
3. Disconnect the control panel cable.
4. Remove the upper side plate from the drive module if convenient.
5. Remove screws (if any) that fasten the drive module to the wall.
6. Inside the pedestal, toward the rear are screws that attach the
drive bus bars to the pedestal bus bars. The connections are
staggered for easy access using a wrench with an extension.
Remove these screws (6).
Torque when re-assembling:
• R7: M8 (5/16 in) screws, 15…22 Nm (11…16 lb ft)
• R8: M10 (3/8 in) screws, 30…44 Nm (22…32 lb ft)
WARNING! Be careful not to drop screws inside the pedestal.
Loose metal pieces inside the unit may cause damage.
7. The following cables between the drive and the extension
module are split by a connector located at the front of the drive.
Disconnect both cables at this location.
• The power supply cable to the OMIO board.
• The power supply cable to the extensionmodule cooling fan.
8. At the OTIF board, disconnect the two fiber optic cables. Make
note of the terminal colors for use when reconnecting.
9. Carefully remove the cables disconnected in the above steps: Pull
the cables down inside the pedestal and bundle them so that they
will not get damaged or caught in the trolley when the drive mod-
ule is wheeled out.
R7 5
6
INSTALLATION
(Frames R7-R8)
R7
8
7
9