Installing the heat exchanger on an IBM Enterprise Slim Rack (7965-S42) with the hoses routed to the bottom of the rack
Install the heat exchanger on an IBM Enterprise Slim Rack (7965-S42) with the hoses that are routed to the bottom of the rack.
About this task
Procedure
- Align the two screws with the lower two holes in the latch plate, as shown in Figure 1.
Figure 1. Installing the latch plate 
Item Description A Latch plate B Screws -
Install the bottom hinge bracket on the rack:
- Add three M6 nut clips to the rack, as shown in Figure 2.
- Install the lower hinge bracket by tightening the top and bottom M6x20 screws (P/N 01KL839), as shown in Figure 2. Use a torque screwdriver to tighten the screws to 2.5 Nm ± 0.2 Nm (22.1 inch lbs ± 1.8 inch lbs).
Figure 2. Installing the bottom hinge 
Item Description A Bottom hinge bracket B Screws -
Partially install the top hinge bracket:
- Add two M6 nut clips to the rack, as shown in Figure 3. One nut clip is installed on the top of the rack flange, the second on the underside of the rack flange.
- Install the upper hinge bracket without tightening the M5 and two M6x16 screws, as shown in Figure 3.
- Unscrew the upper hinge pin, as shown in Figure 3, and set it aside.
Figure 3. Partially installing the top hinge bracket 
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Push up on the upper hinge bracket. Align the top of the hinge pin with the rightmost hole in
the hinge bracket, as shown in Figure 4.
Figure 4. Aligning the bottom hole with the hinge pin 
Item Description A Bottom hinge bracket B Top hinge bracket - Remove the inner hose panel by removing two screws on the inside bottom of the heat
exchanger, as shown in Figure 5.
Figure 5. Removing the inner hose panel 
Item Description A Inner hose panel - Remove the outer hose panel by removing the two screws on the outside bottom of the heat
exchanger, as shown in Figure 6.
Figure 6. Removing the outer hose panel 
Item Description A Outer hose panel B M4 screws -
Install the lower air baffle in the rear of the rack. Secure the air baffle to the rack with
two M5 and two M6 screws, as shown in Figure 7. Use a torque screwdriver to tighten the screws to 2.5 Nm ± 0.2 Nm (22.1 inch lbs ± 1.8 inch
lbs).
Figure 7. Install the lower air baffle 
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Install the hose guide peg by using one M5 screw. Use a torque screwdriver to tighten the screw
to 2.5 Nm ± 0.2 Nm (22.1 inch lbs ± 1.8 inch lbs).
Figure 8. Hose guide peg 
Item Description A Lower hinge assembly B M5 flathead screw (install under former slider) C M6 screw D M6 screws E Hose guide F M6 screw G Baffle assembly -
Couple the hoses, as shown in Figure 9.
The two quick connects are brought together by rotating them fully along the hose center line to
interconnect both the halves and then both levers are rotated fully to be inline with the
hose.
Figure 9. Coupling the hoses 
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Rotate the rack hose brackets down and secure the hook-and-loop strap around each hose as
needed.
Figure 10. Kickstands positioned downward 
Item Description A Hook-and-loop strap - Route the hoses under the rack. Ensure that one hose is on each side of the hose guide
peg. To know more about the methods to route the hose connections at the bottom of the rack in a
raised floor environment, see Figure 14.
The customer provided interconnection to the rack (under-the-floor manifold, CDU, and so on) must have a 25.4 mm (1 in.) female NPT fitting for each heat exchanger supply and return connection. The 25.4 mm (1 in.) NPT male barb fitting from the hose kit must be threaded onto the NPT female fitting on the customer CDU plumbing. A thread sealant must be used to create a leak-free connection. Teflon tape cannot be used, as Teflon tape particles might enter the water stream. The fitting must be installed onto the customer CDU plumbing before the hose is attached to the barb.
To make the connection from the hose to the barb fitting, the facility hoses must first be cut to length. If the CDU plumbing fitting requires a longer hose than the 4.26 m (14 ft) facility hose, the plumbing must be altered to bring the fitting close enough such that the 4.26 m (14 ft) facility hose is sufficient. The end of the hose must be cleaned so that no particles are inside the hose before installation. The clamp is inserted over the hose and then the barb is inserted into the hose. Position the clamp within 5 mm (1.97 in.) of the hex portion of the fitting (not over the barb) and tighten the clamp with an Oetiker clamp tool. For more information about the clamp tool, see Forged steel Standard Jaw Pincers. The ears of the clamp must be tightened so that they make contact with each other. When the clamp is released, the ears relax and a small space is left between. This small space is normal. Figure 11 shows dimension S that must be fully closed during the clamping process.
Figure 11. Clamp ear 
The supply and return labels must be applied on both ends of the facility hose to indicate the function of each hose. The quick connects on the end of the facility hose can now be connected to the quick connects on the heat exchanger.
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After you attach the hoses and fill the heat exchanger with water, complete the following
steps:
- Install the inner hose access panel on the inside bottom of the heat exchanger, as shown in
Figure 12. Add two M6 screws, as shown in Figure 13. Use a torque screwdriver to tighten the
screws to 2.5 Nm ± 0.2 Nm (22.1 inch lbs ± 1.8 inch lbs).
Figure 12. Installing the inner hose panel 
- Install the outer hose access panel on the outside bottom of the heat exchanger. Secure the
outer hose access panel to the heat exchanger with two M4 screws. Use a torque screwdriver to
tighten the screws to 2.5 Nm ± 0.2 Nm (22.1 inch lbs ± 1.8 inch lbs).
Figure 13. Installing the outer hose panel 
- Reconnect power to the rack and all components; then, close and latch the heat exchanger.
- Install the inner hose access panel on the inside bottom of the heat exchanger, as shown in
Figure 12. Add two M6 screws, as shown in Figure 13. Use a torque screwdriver to tighten the
screws to 2.5 Nm ± 0.2 Nm (22.1 inch lbs ± 1.8 inch lbs).
Installing the rear door heat exchanger on a raised floor environment
You might need to install your rear door heat exchanger on a raised floor environment.
About this task
To route and secure the hoses in a raised-floor environment, complete the following steps:
Procedure
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Cut an access hole in the floor tile; then, reinstall the floor tile. The access hole for the
supply and return hoses must be a minimum of 200 mm (8 in.) long x by 100 mm (4 in.) wide.
Each cutout must be lined with grommets so that the hose is not pulled across sharp edges of the cutout. Consult your floor tile manufacturer to determine whether there are more supports that are required for the cutout, or requirements for the position of the cutout in regard to the edge of the floor tile. The following figures show three different possibilities for floor tile cutout locations and the hose routing for each cutout location. Variations to this routing are allowed. These three figures show the general routing that allows for the door to open and close with minimal hose kinking and movement.Note: These illustrations show the view of the rack from the top, looking down.
Figure 14. Routing and securing the hoses in a raised floor environment for individual racks 
In the following illustration, the numbers represent the suggested placement of racks that share one hole in the floor.
For example, if three racks share one hole in the floor, place the racks as shown by numbers 1, 2, and 3. If you want to add a fourth rack that uses the same hole in the floor, then place it next to rack number 1.Figure 15. Option for hoses in adjacent racks to share a single hole in the floor 
Note: If more than one rack uses the same hole in the floor tile, the floor tile cutout must be increased in size. -
Route the hoses through the access hole lengthwise, under the rack and around the rear caster
on the pivot side of the heat exchanger.
Figure 16. Flexible hoses secured to the bottom of the rear door heat exchanger 
Installing the rear door heat exchanger on raised and nonraised floor environments
You might need to install the manifold on racks that are on both raised and nonraised floors.
About this task
If the coolant distribution unit (CDU) that is providing water to the heat exchangers is in a row of racks with the heat exchangers, all hoses can be routed on top of the floor, irrespective of whether it is a raised floor or a slab floor installation. The model type 7965 rack has sufficient clearance underneath the rack to enable the quick connects to be run underneath the rack. This configuration provides a clean hose routing solution with the hoses of minimum length.
