P73 Heater Level FUN 08
LED Display LCD Display
Range Off, 1 – 25% FLA (Default Off)
Description The Heater Level parameter sets the level of D.C. current that reaches the motor when the motor winding
heater/anti-windmilling brake is enabled. The motor winding heater/anti-windmilling brake can be used to
heat a motor in order to prevent internal condensation or it can be used to prevent a motor from rotating.
z NOTE: The motor can still slowly creep when the anti-windmilling brake is being used. If the motor has
to be held without rotating, a mechanical means of holding the motor must be used.
The motor winding heater/anti-windmilling brake operation may be controlled by a digital input and by a
heater disable bit in the starter control Modbus register. There are two methods using the digital inputs, either
the input is an enable or disable.
Enabled: When the DI 1, DI 2 or DI 3 inputs are programmed as Heat Enable Inputs, the input may be used to
control when heating/anti-windmilling is applied. The Heater / Anti-Windmill Level parameter must be set,
the starter stopped and this input must be high for heating to occur.
Disabled: When the DI 1, DI 2 or DI 3 inputs are programmed as Heat Disable Inputs, the input may be used
to control when heating/anti-windmilling is applied. The Heater / Anti-Windmill Level parameter must be set
and this input must be low for heating to occur.
If no digital inputs are programmed as heater enabled or disabled, the heater is applied at all times
when the motor is stopped.
The level of D.C. current applied to the motor during this operation needs to be monitored to ensure that the
motor is not overheated. The current level should be set as low as possible and then slowly increased over a
long period of time. While this is being done, the temperature of the motor should be monitored to ensure it is
not overheating.
The Motor should be labeled as being live even when not rotating.
The heater feature should not be used to dry out a wet motor.
z NOTE: When in single phase mode, the heater function is disabled.
z NOTE: When this function is "on", all of the other parameters cannot be programmed until this parameter
is turned "off".
See Also Digital Input Configuration (P48-50 / I/O 01-03) parameters on page 110.
123
6 - PARAMETER DESCRIPTION
FUN: Heater Level
08 Off
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