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Prevent water heater freezing |
 Prevent
water heater freezingAdd a freeze control circuit to water heater wires. This would activate when temperature drops below 40°F. When you leave for vacation, turn off 30 amp switch, and then freeze control overides switch when air temperature drops below 40°F  Buy: Box mount freeze switch Freeze thermostat 30 amp switches 30 amp contactors Resources: More about Contactors Override T104 timer with freeze control Add another thermostat to water heater |
Add
freeze control to T104 timerYou can wire a separate freeze control Or buy integral freeze control and contactor  Buy: Freeze thermostat 30 amp contactors Freeze thermostat Resources: T100 timers Freeze controls How to wire T104 timer >Freeze control and contactor inside box Freeze contals and manuals |
Re-wire
water heater for PIDInsert probe near lower thermostat. Position against tank wall and cover w insulation. Wire thermostat and element as shown 240 volt line for water heater MUST be routed through ECO located on upper thermostat. Why? Because ECO is safety device that will cut power to element in event of overheating. PID is powrered by 120 volt for example. Hot and neutral are needed for PID. Set temperature controller program. When temperature probe senses cold water, then PID activates contactor Contactor switches 30 amp water heater circuit, and lower element tuns on. Lower element keeps tank hot. This wiring design, both hot wires to element are cut off by contactor. Do NOT connect 240 volt 30 amp water heater circuit to PID... must use contactor Buy: PID Temperature controllers Digital temperature controller 30 amp contactors Solid State Relay Board for Arduino Resources: Contactors Select breaker and wire size |
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Buy Electronic parts Industrial supplies Tools and home improvement Home and garden Hayward pool Pentair pool Southwire electric |
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Tools DEWALT Black and Decker Stanley SKIL Makita Porter-Cable Bosch Irwin Hand tools Klein hand tools Fluke electrical testing Dremel hobby tools Campbell Hausfeld air powered Tekton automotive Powerbuilt automotive Saws and saw blades |
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Resource: Compare box timers DPDT timers Intermatic Control water heater w/ Z-wave |
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Resource: Intermatic control centers: and parts Digital control centers and parts Tork control centers and parts Subpanels All control centers and parts Enclosures |
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Resource: Programmable timers Countdown timers Off delay timers On delay timers Timer modules Din rail Twin & one-shot Woods Intermatic Tork |
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Recirculation systems |
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