Cooling Loop Application Guidelines
ATTENTION:
Risk of equipment damage exists.
Do not use ferrous and plated ferrous materials for pipe-treated water to the power modules and drive. Use of ferrous materials degrades the performance of the power module chillplate.
This section is intended to provide guidelines for applying the cooling loops.
- The allowable drive coolant temperature range for frame 6L drives is 0…50 °C (32…122 °F). When using coolant at a temperature below the dew point of the surrounding air, condensation can accumulate on the drive heatsink and/or circuit boards, which can damage the drive. In this situation, install a coolant flow regulating device and tube/hose insulation. A flow regulating device modulates the coolant flow rate to a level that permits the drive heatsink temperature to rise above the dew point. Insulation for customer side tube or hose can be closed-cell foam insulation with a minimum 12.7 mm (0.50 in.) wall thickness.
- Include a flow switch in the cooling loop on the connection to the drive inlet to turn off the drive if coolant flow drops below the minimum flow required by the drive.
- Circulate coolant through the drive only when the drive is also powered. Failure to do this can result in condensation accumulating on the drive heatsink and/or circuit boards, which could damage the drive.
- Use an interlock from the cooling loop to stop the drive when the cooling loop is faulted.
- For applications requiring a closed loop coolant system, vent the system to remove air that can otherwise degrade the performance of the drive heatsink.
- Install a flow measuring device at the inlet of each complete drive.
- We recommend the following types of pipe for cooling loop connections: brass, type L copper, 300 series stainless steel.IMPORTANT: Do not use galvanized pipe.
- Provide a method in the cooling loop for draining and replacing the coolant.
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