Replacement Instructions for the Water Inlet Coupling HP Modular Cooling System

Replacement Instructions for
the Water Inlet Coupling
HP Modular Cooling System
About this document
This document describes the procedure for replacing the
water inlet coupling of an HP Modular Cooling System
(MCS).
Customers who order a replacement water inlet coupling are
supplied with a kit that contains the spare water inlet
coupling. To replace the original water inlet coupling, remove
it from the MCS unit and replace it with the new water inlet
coupling 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 disconnectin
g
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.
WARNING: To reduce the risk of electric shock or
dama
g
e to the equipment, use extreme caution when
removing and replacing components that involve
water around the electrical wires and unsecured
power inlet box. There is great risk of electrical
shock when water is used near electricity.
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.
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.
• Plug the power cord into a grounded (earthed)
electrical outlet that is easily accessible at all
times.
• Unplug the power cord from the power supply to
disconnect power to the equipment.
• Do not route the power cord where it can be
walked on or pinched by items placed against it.
Pay particular attention to the plug, electrical
outlet, and the point where the cord extends from
the storage system.
4. Disconnect the two AC power cables from the power
connectors, labeled Primary and Secondary, on the
power inlet box.
5. Disconnect the network cable from the RJ-45 connector
on the power inlet box.
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.
Required tools
To complete the following steps you will need a 5-mm
Allen wrench.
Additional hardware required
To complete the removal and replacement procedure for the
water inlet coupling, you will need three 40-mm Allen nuts
and bolts.
You can purchase these items at your local hardware store.
Removing the water inlet
coupling
1. Using a pipe wrench, loosen the water inlet coupling
and disconnect the water inlet hose from the
supply hose.
© Copyright 2007 Hewlett-Packard Development Company, L.P.
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 444986-001
April 2007 (First Edition)