Installation guide

1. Pull out the main circuit breaker T-handle on the H405-E/F AC power
controller (see Figure 6–1).
2. At the control panel, turn the upper key switch to 0.
3. Turn the lower key switch to Halt.
The main circuit breaker controls power to the system. For normal
operation, the circuit breaker T-handle should be in the On position, which
is pressed in. To trip the main circuit breaker, pull the T-handle out.
A current overload causes the main circuit breaker to automatically move
to the Off position, so that power to the system is turned off.
If an overtemperature condition or an airflow blockage occurs, a contactor
in the AC power controller is opened and the system powers down.
Powering Up the System 6–3