Barco ULC-30A, Service Manual

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8. Primary pump unit
7. Use the wizard to open the bypass valve.
8. Follow the wizard’s instructions to drain the chiller. See "Draining the coolant circuit", page 26.
9. Disconnect the primary pump wiring. See "Disconnecting the primary pump wiring", page 38.
10.Remove the primary pump unit. See "Removing the primary pump unit", page 40.
11.Install the new pump. See "Installing the primary pump unit", page 43.
12.Connect the primary pump wiring. See "Connecting the primary pump wiring", page 45.
13.Follow the wizard’s instructions to fi ll the chiller coolant circuit. See "Filling the coolant circuit", page 28.
14.Use the wizard to close the bypass valve.
15.Install the Fan unit. See "Installation of the fan unit", page 22.
16.Finish the replacement process by fi nishing the wizard, disconnecting the PC cable, installing the covers and connecting the
chiller back to the projector, other chiller(s) and the power net.
8.2 Disconnecting the primary pump wiring
Necessary tools
• Phillips screwdriver PH2
• Nut spanner 7 mm
This procedure assumes that power has been switched off. Unless otherwise stated, power must be off prior
to start with this procedure. To switch off power, see procedure "Switching off power and locking the switch",
page 15.
How to disconnect the primary pump wiring?
1. If not yet removed, remove the left cover. See procedure "Removing a cover", page 17.
2. Unplug the primary pump unit cable connector.
Image 8-2
Unplugging the primary pump unit cable connector
3. Remove the pump motor connection box cover. Use the Phillips screwdriver PH2 to remove the 4 screws (reference 1 image 8-3).
38 R5906015 ULC-30A 01/02/2018