IBM System x3750 M4 Installation And Service Manual page 126

Note: Only trained service technicians, other than IBM service technicians, are
authorized to install and remove the 750-watt -48 V to -60 V dc power supply, and
make connections to or disconnections from the 750-watt -48 V to -60 V dc power
source. IBM service technicians are not certified or authorized to install or remove
the 750-watt -48 V to -60 V dc power cable. You are responsible for ensuring that
only a trained service technician install or remove the 750-watt -48 V to -60 V dc
power cable.
Procedure
108
System x3750 M4 Types 8722 and 8733: Installation and Service Guide
1. Read the notes at the beginning of this section and read the safety information
and installation guidelines, see "Safety" on page vii and "Installation
guidelines" on page 35.
2. Turn off the server (see "Turning off the server" on page 22) and all attached
peripheral devices. Disconnect all external cables from the server.
Attention: When you handle static-sensitive devices, take precautions to
avoid damage from static electricity. For details about handling these devices,
see "Handling static-sensitive devices" on page 37.
3. Turn off the circuit breaker(s) for the dc power supplies.
Note: Make sure that you use a circuit breaker that is rated 40 amps.
4. Remove the power-supply filler panel from the power-supply bay where you
are installing the power supply. Save the filler for later use.
5. Touch the static-protective package that contains the power supply to any
unpainted metal surface on the server; then, remove the power supply from
the package and place it on a static-protective surface.
6. Attach the dc power cable to the new power supply. Make sure that the
power cable wires are connected securely to the -48 V, ground, and to the -48
V return terminals (as shown in the following illustration). Make sure that:
a. You use 4 mm2 (10 AWG) at 60° C copper wire.
b. Cut the power cable wires to the correct length, but do not cut the wires
shorter than 150 mm (6 inches).
c. Torque the wiring-terminal screws to 0.50 ~ 0.60 newton-meters (4.43 ~
5.31 inch-pounds).
7. Insert the power-supply spacer into the left side of the power-supply bay
(against the bay wall) and slide it in until it snaps into place on the tabs on
the side of the power supply bay.