The HD (Heavy Duty) Terminal
The HD terminal must be left unused or only ever be linked to the
relay terminal Relay 1 Normally Open. It must never be used for
any other purpose and it must never be connected to any external
device. Under no circumstances connect the HD terminal to the
terminals of Relay 2. The HD terminal must be regarded as live at
all times and at full mains potential.
WARNING
The F60 pump controller contains a solid-state switch (HD Heavy Duty
drive) that can be used to protect the contacts of Relay 1 by eliminating the
destructive arcing caused by the starting and stopping of pump motors.
The solid-state switch is accessible from the HD (Heavy Duty) terminal on
the terminal block. We recommend the HD drive be used whenever the
controller is used to directly control a pump motor. The HD drive should
not be used when the F60 pump controller is connected to external timers,
low wattage relays or to any other external device where voltage free
contacts are required. It is strictly intended for the direct control of highly
inductive AC motor loads. The HD terminal and the controller’s built in
relays must never be connected to a DC motor under any circumstances.
When the HD terminal is linked to the terminal Relay 1 Normally Open, the
HD drive in effect parallels a 40 Amp solid state switch across the relay’s
normally open contacts. This increases the momentary current carrying
capacity of the relay’s contacts to well over 60 Amps. The solid state HD
drive is only activated for a short period when the pump starts and stops.
It effectively handles the high inrush current associated with the pump
starting, and it provides a current path for the destructive back EMF
associated with the pump motor stopping.
To use the HD drive place a heavy link wire, 1.0mm or 1.5mm Sq between
the HD terminal and the Normally Open terminal of Relay 1.
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Summary of Contents for F60
Page 11: ...ALIGNING THE PADDLE ASSEMBLY 8...
