Model 7965-94Y water cooling manifold (Feature codes ER22 and ER23)

Learn about the water cooling manifold that is available for model 7965-94Y racks with feature code (FC) ER22 or ER23 installed.

Overview

The 7965-94Y water cooling manifold provides water supply and water return for 1 - 20 servers that are mounted in a 7965-94Y 42U slim rack. The manifold is mounted on the right side of the rack (when viewed from the rear of the rack) and extends for 40U. Power distribution unit (PDU) pockets on the right (when viewed from the rear) are not accessible and cannot be populated in the water-cooled configuration. The manifold does not interfere with the placement of servers or other I/O drawers. Quick connect fittings are located every 2U on the manifold for water supply and return that provides 20 pairs of fittings.

Note: This solution is only available for use with IBM® water-cooled servers.

Configurations

FC ER22 can be used to order the manifold with water input and output at the top of the rack. Since the hose exits through the top of the rack, the top 2U must be left vacant. All 2U drawers must be populated into the rack on odd EIA increments.

Figure 1. Rack and manifold with supply and return hoses exiting through the top of the rack

FC ER23 can be used to order the manifold with water input and output at the bottom of the rack. Since the hose exits through bottom of the rack, some space must be left open on the bottom. When 1U of bottom space is left open, all 2U drawers must be populated into the rack on even EIA increments. When 2U of bottom space is left open, all 2U drawers must be populated at odd EIA increments.

Figure 2. Rack and manifold with supply and return hoses exiting through the bottom of the rack

Top hose exit locations

The following graphics show the location of the hose exiting from the top of the 7965-94Y rack.

Figure 3. Top hose exit locations

Figure 4. Top hose exit locations (when viewed from the top)

Note: Approximately 0.91 m (3 ft.) of hose is available after the hose exits the top of the rack.

Bottom hose exit locations

The following graphics show the floor cutout locations and dimensions that are required for water hoses that are routed out through the bottom of the rack and under the floor. Power cables can also use this cutout.

Figure 5. Bottom hose exit locations

Figure 6. Bottom hose exit locations (when viewed from the bottom)

Bottom hose exit locations (when view from the bottom)

Note: Approximately 0.91 m (3 ft.) of hose is available after the hose exits the bottom of the rack.

Specifications

Table 1. Manifold specifications
Manifold characteristics	Properties
Manifold weight - dry	13.6 kg (30 lbs.)
Manifold weight - with water	17.5 kg (38.6 lbs.)
Manifold volume	6 L (1.6 gal)
Note: For more information about rack weight, see Model 7953-94X and 7965-94Y rack.

The rear door heat exchanger can be used with this rack. For more information about rear door heat exchangers, see Model 1164-95X rear door heat exchanger specifications.

Hoses

The servers are connected to the manifold through quick-connects. The manifold has one cold water inlet that leads to the rack and one warm water outlet. Hoses are supplied by IBM. Hoses can be cut to length, but first must be cleaned so that no particles are inside the hose before installation. Some slack must be kept in the hose for easier installation. For more information about recommended clamping tools and specifications, see Oetiker.

Figure 7. Hose kit

Table 2. Hose kit dimensions
Hose information	Dimensions or type
Hose length	426.72 cm (14 ft)
Hose machine end	Quick-connect
Water supply end	25.4 mm (1 in.) National Pipe Thread Taper (NPT) male barb and clamp¹
Bend radius	203.2 mm (8 in.)
Hose inside diameter	25.4 mm (1 in.) plus or minus 0.5 mm (0.02 in.)
Hose outside diameter	34.54 mm (1.4 in.) plus or minus 0.76 mm (0.03 in.)
Note: The hose kit that is supplied contains the following items: Two hoses with preattached quick-connects for connection to manifold Two 25.4 mm (1 in.) NPT male barbs Four Oetiker hose clamps 16703242 Three supply labels Three return labels ¹You must provide a 25.4 mm (1 in.) NPT female fitting on the facility hoses.

Cooling loop requirements

A secondary cooling loop, separate from the main site cooling loop, is required for the manifold.
Cooling distribution units are available from suppliers such as Eaton-Williams.
The secondary cooling loop must meet the requirements that are outlined in the water chemistry specification.

For more information about water chemistry requirements, see Water cooling system specification and requirements.

Floor cutout

Racks with water hoses and power cords that exit from the bottom of the rack require a floor tile cutout of at least 30.48 cm (12 in.) long by 17.78 cm (7 in.) wide. Due to the hose bend radii, the hole must be positioned towards the side of the rack without the manifold (the left side of the rack when looking at the rear of the rack). The left edge of the hole must be at least 10.16 cm (4 in.) from the side and 5.08 cm (2 in.) from the back edge of the rack (not including doors). The right edge of the hole must be at least 20.32 cm (8 in.) from the right side of the rack (not including side covers). Hole placement on the tile depends on the location of the rack, tile size, and tile load limitations.

Figure 8. Floor cutout

Last updated: Tue, February 02, 2021