Manifold replacement (trained technicians only)

Use the following procedures to remove and install the manifolds.

Important

This task must be operated by trained technicians that are certified by Lenovo Service. Do not attempt to remove or install the part without proper training and qualification.
The coolant runs through the cooling system is de-ionized water. For more information about the coolant, see Water requirements.
The server can be installed in the ThinkSystem Heavy Duty Full Depth Rack Cabinets. For ThinkSystem Heavy Duty Full Depth Rack Cabinets User Guide, see ThinkSystem Heavy Duty Full Depth Rack Cabinets User Guide.
For more operation and maintenance guidelines on Coolant Distribution Unit (CDU), see Lenovo Neptune DWC RM100 in-rack Coolant Distribution Unit (CDU) Operation & Maintenance Guide.

The illustrations below present the rear views of a rack cabinet; three sets of manifolds and three sets of connection hoses. There are two labels attached to the front of the manifolds, and one label on one end of each hose.

Figure 1. Manifolds in a 42U in-row system	Figure 2. Manifolds in a 42U in-rack system	Figure 3. Manifolds in a 48U in-rack system
Figure 4. 42U in-row hose kit	Figure 5. 42U in-rack connection set	Figure 6. 48U in-rack connection set

1 Two left spools on supply manifold
2 Two right spools on return manifold

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