Here's a 240V diagram with clock timer and freeze control:
Add a comment if explanation does not fit your exact timer:
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http://waterheatertimer.org/images/Freeze-protection-500.jpgHere's how freeze control works:
Freeze control is like regular timer, except it turns ON by thermostat instead of time-clock
Freeze control turns ON pump whenever thermostat kicks on.
Both clock-timer and freeze-control are wired to pump in 'parallel' so to speak.
Think of it as having two controls wired to same pump...
Both controls can turn pump ON-OFF.
If one turns ON, and other is OFF ... then pump is ON.
If both are ON, then pump is ON ... and electricity just flows around on extra wires.
If both are OFF, then pump is OFF.
Say it's below freezing all day.
Freeze control circuit is ON all day ... pump is ON all day
Clock timer turns ON > but circuit is already ON, so timer just opens more wires for electricity to flow around on.
When clock timer turns OFF > freeze circuit is still ON because it's below freezing ... pump is still ON.
240V wiring:
Power leads coming from circuit breaker go to terminals 1&3 on clock-timer
Same power leads connect to freeze-control-black and freeze-control-red.
Or connect freeze-control-black and freeze-control-red to terminals 1&3
This action puts power to clock and power to thermostat
Pump wires connect to terminals 2&4
Same pump wires also connect to freeze-control-blue and freeze-control-yellow.
Or connect freeze-control-blue and freeze-control-yellow to terminals 2&4
This action connects pump to both freeze-control and timer.
When either clock-timer or freeze-control turn ON, then pump turns ON.
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