Primary circuit drain valve locations:
• 1 on underside of filter housing (if fitted)
• 1 on supply tail pipe (top or bottom exit)
• 1 on return tail pipe (top of bottom exit)
Secondary circuit drain valve locations:
• 1 in base of each pump
• 1 at base of each filter inlet
• 1 in supply tail pipe (bottom exist only)
• 1 in return tail pipe (top of bottom exit)
• 1 in return manifold pipe (if fitted) to heat exchanger
7 Secondary Filter Service (if Fitted) Proprietary and Confidential ©2025 Vertiv Group Corp. 75
Vertiv™ CoolChip CDU 600 Operation and Maintenance Guide
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