CHIEF Caldwell AF12-751, Руководство пользователя

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Bulletin 441G
A. STARTING AXIAL FAN
1. 230/460 VOLT FAN
On 230 Volt and 460 Volt units, the fan is
started by moving the toggle from the “OFF”
position through the “RUN” position up to the
“START” position. When the fan begins to
start the switch should be released. The
switch is designed to return to the “RUN”
position. In this position the fan will continue
to operate until the toggle is moved from the
“RUN” to the “OFF” position, or unit the
internal motor thermal protection interrupts
the power by opening the circuit. With the
motor thermal protection in the open position
the fan cannot be started by moving the toggle
into the “START” position. When the motor
thermal protector closes, the fan will not
restart by itself, the toggle will need to be
moved to the “START” position to start the unit
again. Note that if the motor thermal protector opens to shut off the fan refer to the
Service Section for determining the cause of the thermal protector opening.
2. 575 VOLT FAN
On 575 Volt units, the fan is started by
pushing in the switch button marked “START”.
When the fan begins to start the button should
be released. The fan will continue to operate
until the “STOP” button is pushed in, or until
the internal motor thermal protection
interrupts the power by opening the circuit.
With the motor thermal protection in the open
position the fan cannot be started by pushing
the “START” button in. When the motor
thermal protector closes, the fan will not
restart by itself, the “START” button will need
to be pushed in to start the unit again. Note
that if the motor thermal protector opens to
shut off the fan refer to the Service Section for
determining the cause of the thermal protector
opening.
3. SHUTTING THE FAN OFF
When shutting the fan down for the season, shut off the power at the fan disconnect
rather than at the fan controls to provide additional protection from unauthorized
personnel operating the fan, and potential damage to the fan from a lightning strike.
Refer to the Maintenance Section for off season operation recommendations.
Figure 14. Toggle Switch.
Figure 15. Push Button Switch.