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CONNECTING THE
CONTROL UNIT TO
AN AC OUTLET
POWER TO THE
SYSTEM
A properly grounded outlet protects the system against
damage from power surges and other disturbances. Refer
to “System Grounding Requirements” on page 2-5. The
outlet should be 117-volt, 60-Hz, third wire grounded. To
ensure proper operation of the system, the ac outlet should
be connected to earth ground.
NOTE:
Do not connect the control unit to a switch
controlled outlet. Accidental disconnection and
loss of data may occur.
Perform the following steps to connect the control unit to
an ac outlet:
1
2
3
4
Make sure the power switch on the Power Supply
Module is in the
OFF
position. If there is an
expansion power supply, turn it off also. If the system
has any Auxiliary Power Supplies, make sure that they
are unplugged from the ac outlet.
Plug one end of the power cord into the connector just
below the power switch on the front of the Power
Supply Module labeled “AC INPUT.” Do this for each
carrier.
If the system has one or more Auxiliary Power Units,
see “Installing the Auxiliary Power Unit” on page 2-
72.
Plug the other end of the power cord into the ac outlet,
allowing for at least 1 foot of slack.
CAUTION:
Do not attach the power cord(s) to the
building surfaces.
When the system is completely installed and ready to be
powered-up, follow the sequences described below to
apply or remove power.
2-90 Installing the Control Unit