3Com RELEASE 2 Connect the Control Unit to the AC Outlet, Control unit attached to power source

CONNECT THE CONTROL UNIT TO THE AC OUTLET

The ac outlet should be a 117-volt, 60-Hz, 3-prong, third-wire grounded outlet. You should have an electrician check the outlet’s third wire to make sure the outlet is properly grounded. Proper grounding helps protect the system against damage from power surges caused by static discharges and lightning. See "Appendix C: Grounding Requirements" before connecting the control unit to the power source.

Once you are satisfied that the outlet is properly grounded, connect the control unit to the ac outlet as follows:

1Make sure the power switch on the control unit is set to Off.

2Plug one end of the power cord into the socket just below the power switch on the front of the control unit.

3Thread the cord through the cable channel at the bottom of the control unit.

4Plug the other end of the cord into the ac outlet, allowing for a foot or so of slack.

5Set the power switch on the control unit to On.

The green power light on the control unit goes on.

The red warning light on the control unit blinks once, then goes off unless a malfunction occurs.

The orange light on the power module goes on indicating that the outlet is properly wired and grounded. If the orange light is off when the green light is on, the outlet is not functioning, or may be miswired or improperly grounded. Contact a qualified electrician immediately.

See Figure 13.

FIGURE 13 The control unit attached to power source.

As soon as the unit is turned on, the red warning light should flash once,

then remain off. Observe the lights on the control unit to determine its

condition before proceeding. If any of the conditions described in the following table exist, take the recommended steps to correct the situation.

Step 1: Installing the Control Unit 15