the ibm rear door heat exchanger (rdhx)(1164-95x) provides an extremely efficient option to cool the air exiting the ibm pureflex system 42u rack (7953-94x). 30,000 watts (30 kva or 102,000 btu per hour) can be removed before the rack's air returns into the machine room, potentially reducing both air conditioning capacity needs and hot spot problems. depending on the configuration, 100% of the heat generated in the rack can be removed.

copper tubes attached to the rear door circulate chilled water. the chilled water removes heat from the exhaust air being blown through the servers and attachments mounted in the rack. the water lines in the door attach to the customer-supplied secondary water loop using industry-standard quick couplings.

the rdhx is used in place of the #ec02 rear door on the ibm pureflex system 42u rack. the rdhx is about 123 mm or 5 inches deep compared to the 25 mm or 1-inch depth of the #ec02 rear door. when the rdhx is attached to the ibm pureflex system 42u rack the overall depth is 1196 mm, fitting onto the standard data center floor tile of 1200 mm. the rdhx is lockable and has identical keying to the ibm pureflex system 42u rack front door and side panels.

the rdhx has hinges on the right side and opens on the left as viewed facing the rear of the rack.

when ordering the ibm pureflex system 42u rack (7953-94x) include the no-charge #ec05 rdhx indicator feature on the 7953-94x to indicate that a standard #ec02 rear door is not required. note that #ec05 does not ship any hardware. order the rdhx hardware using 1164-95x.

for more information, see this link at ibm.com, "ibm rear door heat exchanger"