Replacement Instructions for the Magnetic Solenoid Valve HP Modular Cooling System

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Replacement Instructions for

the Magnetic Solenoid Valve

HP Modular Cooling System

About this document

This document describes the procedure for replacing the

magnetic solenoid valve of an HP Modular Cooling System

(MCS).

Customers who order a replacement magnetic solenoid valve

are supplied with a kit that contains the spare magnetic

solenoid valve. To replace the original magnetic solenoid

valve, remove it from the MCS unit and replace it with the

new magnetic solenoid 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 403350-002

April 2007 (Second Edition)

Summary of content (7 pages)

PAGE 1
Replacement Instructions for the Magnetic Solenoid Valve HP Modular Cooling System About this document This document describes the procedure for replacing the magnetic solenoid valve of an HP Modular Cooling System (MCS). Customers who order a replacement magnetic solenoid valve are supplied with a kit that contains the spare magnetic solenoid valve.
PAGE 2
Powering down the MCS unit 1. Open the front MCS door. 2. Turn off the AC1 and AC2 breakers on the AC transfer switch. 3. Open the rear MCS door. WARNING: To reduce the risk of electric shock or damage to the equipment: • Do not disable the power cord grounding plug. The grounding plug is an important safety feature.
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4. Pull the fan unit out toward you, and remove it from the MCS unit. 3. Pull the power inlet box toward you until it stops. 4. Set the power inlet box aside in the side cavity by lifting the right side of the power inlet box up until the box sits vertically on the left side of the MCS unit. To replace this component, see "Replacing the bottom fan unit (on page 6)." Relocating the power inlet box 1.
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3. Lift the air deflector plate up, tilt it to an angle, and pull it out toward you. To replace this component, see "Replacing the air deflector plate (on page 5)." Removing the magnetic solenoid valve 1. 2. Adjust the water hoses connected to the rear of the bottom heat exchanger unit and hold them out of the way to reach the magnetic solenoid on the valve. This process can be difficult.
PAGE 5
3. Place the magnetic solenoid back on the valve post (1), and press down until the silver retainer tab locks the magnetic solenoid in place on the valve (2). 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 6
4. Connect the green and yellow ground bonding wire to ground the outer support bracket to the MCS unit. 4. Using a T-25 Torx driver, secure the horizontal shipping bracket to the MCS unit by inserting four Torx screws. Replacing the bottom fan unit 1. 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.
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e. Turn on the AC1 breaker on the AC transfer switch. f. Turn on the AC2 breaker on the AC transfer switch. 2. Clear all old logs from the web interface to ensure that any additional alarms are current. 3. 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.