Alpha CFR 5000, Operator'S Manual

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17 2 Installation
Alpha Technologies
2.3.2: Terminal Block
Danger: All wiring must meet the local electrical code. Mark all circuit breakers supply-
ing power to the unit. Connect a dedicated ground wire to the external ground lug if the
building ground is inadequate.
Procedure:
1
Switch off the utility circuit breaker supplying power to the unit.
2
Connect the line to the terminal block as given in Figures 2.2 and 2.3.
• For 120 VAC units use 8 AWG (8.4 mm
2
) and torque to 25 Inch–Pounds (2.8 Nm).
• For 208/230/240 VAC units use 10 AWG (5.3 mm 2 ) and torque to 20 Inch–Pounds
(2.3 Nm).
• Switch on the utility circuit breaker supplying power to the unit. Make sure the unit has
been wired correctly by measuring the voltages at the terminal block. Switch off the circuit
breaker.
3
If used, plug in an external battery pack (Section 2.4).
TIP: The rackmount unit has no internal batteries. It uses an external battery pack.
4
Switch on the utility circuit breaker supplying power to the unit. Start and test the unit with no
loads connected (Section 3.3).
• If it passes go to the next step.
• If it doesn’t do troubleshooting (Sections 3.4, 5.2).
5
Switch off the unit (Section 3.2).
6
Connect the loads to the terminal block as shown in Figure 2.4. See
2
for the recom-
mended wire gauges and torques.
Connection Finished
2.3 Connecting the Unit (Continued)