ABB ACS880-87LC-4000A/4021A-7, Hardware Manual

Page: 132 / 144

132 Cooling and heating
Mechanical installation

Connecting the internal cooling circuit to a customer cooling unit
The converter delivery does not include the liquid cooling unit that is to be connected to
the converter cabinet.
Connecting the liquid pipes
Note: It is recommended to use closing valves in the pipe connections of the cooling
circuit.
1. Ensure that there is sufficient space and free access to make proper cooling pipe
connections between the liquid cooling unit and the converter. It is not allowed to use
inflexible and fixed cooling pipe connections between two separate units (eg, liquid
cooling unit and the converter connection). Always use a flexible connector that can
reduce possible stress caused by eg, vibration.
2. Check visually that the converter liquid pipes are not damaged (threads and flange
joint not damaged).
3. Connect the external cooling circuit directly to the coupling pipes on the side of the
converter. Lay liquid piping with extreme care. Secure the pipes properly mechanically
and check for leaks. See chapter
Technical data for the pipe materials.
4. Position the liquid pipe ends against each other.
5. Centre the connector onto the pipe ends.
6. Tighten the
•
threaded connector carefully and ensure that it is slid on the pipe ends. The use of
appropriate sealant is recommended.
•
flange bolts to a minimum torque of 70 N·m (52 lbf·ft).
7. Make sure that the liquid pipes are securely connected.