Replacement Instructions for the AC Tranfer Switch HP Modular Cooling System

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Replacement Instructions

for the AC Transfer Switch

HP Modular Cooling System

About this document

This document describes the procedure for replacing the AC transfer

switch of an HP Modular Cooling System (MCS).

Customers who order a replacement AC transfer switch are supplied

with a kit that contains the spare AC transfer switch. To replace the

original AC transfer switch, remove it from the MCS unit and replace

it with the new AC transfer switch 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

WARNING: To reduce the risk of electric shock or

damage to the equipment, power off the MCS unit by

disconnecting the two AC power cords connected to the

power inlet box at the rear of the MCS unit before

beginning the removal and replacement procedures.

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 403354-002

April 2007 (Second Edition)

Summary of content (4 pages)

PAGE 1
Replacement Instructions for the AC Transfer Switch HP Modular Cooling System About this document This document describes the procedure for replacing the AC transfer switch of an HP Modular Cooling System (MCS). Customers who order a replacement AC transfer switch are supplied with a kit that contains the spare AC transfer switch. To replace the original AC transfer switch, remove it from the MCS unit and replace it with the new AC transfer switch as described in the following instructions.
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: 4. 5. • Do not disable the power cord grounding plug. The grounding plug is an important safety feature. • Plug the power cord into a grounded (earthed) electrical outlet that is easily accessible at all times.
PAGE 3
6. Disconnect the electrical power cables from the rear of the AC transfer switch. Replacing the AC transfer switch 1. Connect the green and yellow ground bonding wires to the water group controller. 2. Connect the electrical power cables from the MCS unit to the AC transfer switch. a. Disconnect the three large cables, starting from the left and moving to the right, by inserting a small flathead screwdriver in between the cable connection and the latch, and pulling the cable out from the connector.
PAGE 4
3. b. Connect the network cable to the RJ-45 connector on the power inlet box. Using a T-25 Torx driver, secure the AC transfer switch chassis to the water group controller chassis by inserting four Torx screws. c. Connect the two AC power cables to the power connectors on the power inlet box. CAUTION: To prevent damage to the cables and ensure proper fit of the transfer switch chassis, be sure to route all cables through the U-shaped opening in the rear of the chassis. 4.