Replacement Instructions for the Heat Exchanger Unit HP Modular Cooling System

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Replacement Instructions for

the Heat Exchanger Unit

HP Modular Cooling System

About this document

This document describes the procedure for replacing the heat

exchanger unit of an HP Modular Cooling System (MCS).

Customers who order a replacement heat exchanger unit are

supplied with a kit that contains the spare heat exchanger

unit. To replace the original heat exchanger unit, remove it

from the MCS unit and replace it with the new heat

exchanger unit as described in the following instructions.

HP Modular Cooling System Spare

Replacement video

Because of the difficulty of removing and replacing spare

parts, HP recommends watching the HP Modular Cooling

System Spare Replacement video. This video provides further

explanation and detail of replacement strategies and

techniques that might be helpful when attempting to remove

and replace spare parts. You can access the video on the HP

website (http://www.hp.com/go/mcs

Before you begin

The information contained herein is subject to change without notice. The only

warranties for HP products and services are set forth in the express warranty

statements accompanying such products and services. Nothing herein should

be construed as constituting an additional warranty. HP shall not be liable for

technical or editorial errors or omissions contained herein.

The heat exchanger unit can be removed and replaced during

real-time operation.

CAUTION: To reduce the risk of the servers

overheating, open all of the rack doors of each rack

attached to the MCS unit while completing the

following procedures to increase air flow within

the rack.

Part Number 403351-002

April 2007 (Second Edition)

Summary of content (7 pages)

PAGE 1
Replacement Instructions for the Heat Exchanger Unit HP Modular Cooling System About this document This document describes the procedure for replacing the heat exchanger unit of an HP Modular Cooling System (MCS). Customers who order a replacement heat exchanger unit are supplied with a kit that contains the spare heat exchanger unit. To replace the original heat exchanger unit, remove it from the MCS unit and replace it with the new heat exchanger unit as described in the following instructions.
PAGE 2
Required tools CAUTION: The fan unit weighs 16.8 kg (37 lb). Use extra caution when removing and replacing the top fan unit because it might be higher than your shoulders and is heavy and awkward to lift. To complete the following steps, you will need: • T-25 Torx driver • Water hose fitting wrench (included with your original MCS unit) • Counter hold wrench (included with your original MCS unit) 4. Pull the fan unit out toward you, and remove it from the MCS unit.
PAGE 3
Removing the heat exchanger unit 3. Disconnect the condensation hose from the heat exchanger unit. 4. Disconnect the green and yellow ground bonding wire grounding the heat exchanger unit to the MCS unit. 5. Open the front MCS door. NOTE: The heat exchanger units are deep-seated within the MCS unit. To access the connections described in the following steps, extend your arm inside the MCS unit until you come in contact with the appropriate connectors. 1. 2.
PAGE 4
c. Remove the heat exchanger unit shipping brackets 7. Pull the heat exchanger unit out toward you. from the MCS unit (3). CAUTION: The heat exchanger unit weighs 23.6 kg (52 lb) with the additional weight of the water. Use extra caution when removing and replacing the top heat exchanger unit because it might be higher than your shoulders and is heavy and awkward to lift. To replace this component, see "Replacing the heat exchanger unit (on page 4).
PAGE 5
1. Insert the new heat exchanger unit into the same position as the heat exchanger unit you removed. IMPORTANT: Keep the Torx screws separated according to their thread type and note which thread type came from which hole location on the shipping bracket. 2. Install the two heat exchanger unit shipping brackets. a. Align the heat exchanger unit shipping brackets to the screw holes on the heat exchanger unit and the MCS frame (1). b.
PAGE 6
5. 6. Connect the condensation hose to the heat exchanger unit. Replacing the air deflector plate 1. Reattach the ground bonding wires to the air deflector plate. 2. Align the two screw holes on the air deflector plate to the two screw holes inside the MCS unit. 3. Secure the air deflector plate to the MCS unit by tightening the two thumbscrews in the two screw holes.
PAGE 7
3. Tighten the two thumbscrews to secure the fan unit to the MCS frame. Operation checklist 1. Clear all old logs from the web interface to ensure that any additional alarms are current. 2. Confirm that no additional warning or alarm messages have been detected by looking at the operator display. Returning the failed component Instructions are provided on the return label supplied with the replacement component.