Replacement Instructions for the Air Bleeder Valve HP Modular Cooling System

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Replacement Instructions

for the Air Bleeder Valve

HP Modular Cooling System

About this document

This document describes the procedure for replacing the air

bleeder valve of an HP Modular Cooling System (MCS).

Customers who order a replacement air bleeder valve are

supplied with a kit that contains the spare air bleeder valve.

To replace the original air bleeder valve, remove it from the

MCS unit and replace it with the new air bleeder valve 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

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.

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.

Part Number 447489-001

April 2007 (First Edition)

Summary of content (7 pages)

PAGE 1
Replacement Instructions for the Air Bleeder Valve HP Modular Cooling System About this document This document describes the procedure for replacing the air bleeder valve of an HP Modular Cooling System (MCS). Customers who order a replacement air bleeder valve are supplied with a kit that contains the spare air bleeder valve. To replace the original air bleeder valve, remove it from the MCS unit and replace it with the new air bleeder valve as described in the following instructions.
PAGE 2
Shutting off the water 1. Shut off the water flowing into the MCS unit at the facility-side shut-off valve. 2. Confirm that no water is flowing into the MCS unit. 3. Loosen the two thumbscrews on the bottom of the fan unit. Required tools To complete the following steps, you will need: • T-25 Torx driver • Pliers • Water hose fitting wrench (included with your original MCS unit) • Counter hold fitting wrench (included with your original MCS unit) CAUTION: The fan unit weighs 16.8 kg (37 lb).
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 5)." Removing the air bleeder valve 1.
PAGE 5
Replacing the air bleeder valve 1. Reach into the access panel cut-out and align the air bleeder valve to the check valve. 2. Firmly hand-tighten the air bleeder valve. 3. Slightly open the top vent of the air bleeder valve, approximately 3/4 turn, to allow for air flow. 1. Insert the new heat exchanger unit into the same position as the heat exchanger unit you removed.
PAGE 6
c. Using a T-25 Torx driver, secure the two shipping 5. Connect the condensation hose to the heat exchanger unit. 6. Using the counter hold wrench to hold the fitting in place and the water hose fitting wrench to tighten the water hose (both wrenches are included with your original MCS unit), connect the In and Out water hoses to the heat exchanger unit. 7. Connect the temperature sensor connector to the heat exchanger unit. brackets to the MCS frame by inserting and tightening four Torx screws (3).
PAGE 7
Replacing the fan unit 1. 4. Using a T-25 Torx driver, secure the horizontal shipping bracket to the MCS unit by inserting four Torx screws. 5. Complete the operation checklist. Align the fan unit to the sliding rails. 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. 2. Slide the fan unit onto the sliding rails inside the MCS unit. Operation checklist 3.