My pop just received a bid to run a very simple irrigation system with ONLY 2 zones 1 for the grass and 1 for a small bed of flowers. It would be supplied by a small Goulds .75hp pump which draws from the lake....He is used it for years, but now wants the sprinklers lines buried etc vs having to haul hoses around the yard and adjust the sprinkler location
The irrigation guy came out I believe said all that would be be needed would be 2 solenoid valves and I believe a pump start relay.
When I asked my pop what safety mechanism (blowoff valve) or something along those lines would he install to prevent the pump from deadheading, he was told one of the valves would always be OPEN. In the event one of the vales didnt open the power would not be supplied to the pump. It sounded like the irrigation guy was saying power is sent to the solenoid valve FIRST. And once the system opens the valve, then and only then would it power up the pump? Thus averting the pump ever turning on without @ least 1 of the valves being open.
Does this sound right? What I'm having a hard time grasping is do these solenoids valves have a mechnism to shut off the pump, if they dont open? What if they get stuck? How can we prevent the pump from deadheading or overheating if one of the valves got stuck when it was alternating bewteen zones. Or worse if both somehow were closed? Perhaps nothing is needed...Can someone explain?
The irrigation guy came out I believe said all that would be be needed would be 2 solenoid valves and I believe a pump start relay.
When I asked my pop what safety mechanism (blowoff valve) or something along those lines would he install to prevent the pump from deadheading, he was told one of the valves would always be OPEN. In the event one of the vales didnt open the power would not be supplied to the pump. It sounded like the irrigation guy was saying power is sent to the solenoid valve FIRST. And once the system opens the valve, then and only then would it power up the pump? Thus averting the pump ever turning on without @ least 1 of the valves being open.
Does this sound right? What I'm having a hard time grasping is do these solenoids valves have a mechnism to shut off the pump, if they dont open? What if they get stuck? How can we prevent the pump from deadheading or overheating if one of the valves got stuck when it was alternating bewteen zones. Or worse if both somehow were closed? Perhaps nothing is needed...Can someone explain?
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