Pump start relay for 1 hp well pump for domestic water

[Jim Goodman]

Background......I'm having a 1 hp, 230 volt well pump installed to replace a 3/4 hp pump. The wire running from the panel to the well is not large enough to handle the 25 amp breaker required by the well pump. For that and other reasons, (My meter base is remote from the house and accessible. Otherwise, I would have to cut and jackhammer concrete in my carport to get a larger wire into the breaker panel in the utility room) I am having a sub-panel run to supply the well pump with power. The pressure tank and pressure switch are in the utility room near the panel. So, when the new power is run, I will need to have a way for the pressure switch to turn on the well pump power, which is now being fed directly through the pressure switch. In a previous post, I asked about this, and was told that what I needed was a pump start relay that would be activated by the wire currently running from the pressure switch to the well. I have been searching all over the web for a pump start relay that would serve this function, and all I have been able to find is relays for sprinkler systems. Is this rainbird relay that would be appropriate for this purpose? https://store.rainbird.com/psr220ic-psr-universal-pump-start-relay-220-volt.html

Thanks.

 

[Valveman]

Pump start relays are made to start the pump from a sprinkler controller and usually need 24V instead of 240V.

All you need is a 30 amp, 230 Volt, double throw contactor, like this.

https://www.amazon.com/Eaton-C25BNB...amp+contactor&qid=1563828750&s=gateway&sr=8-9

You can also order a 1.5HP control box in what the call a "deluxe" model, which comes with the extra relay. I don't think they make deluxe boxes for anything smaller than 1.5HP.

 

[Sponsor]

 

[Reach4]

You can get a relay AKA contactor with a 12o vac or 240 vac coil, if you want to have minimum wiring change. This can be bought mounted in an enclosure. How would you like this to mount?

https://www.functionaldevices.com/products/building-automation/details/RIB01P30/
RIB01P30 is one example. I think it could mount on an electrical box if rain was not a factor.

I am not a pro.

 

[Jim Goodman]

Pump start relays are made to start the pump from a sprinkler controller and usually need 24V instead of 240V.

All you need is a 30 amp, 230 Volt, double throw contactor, like this.

You can also order a 1.5HP control box in what the call a "deluxe" model, which comes with the extra relay. I don't think they make deluxe boxes for anything smaller than 1.5HP.

Thank you.

 

[Jim Goodman]

You can get a relay AKA contactor with a 12o vac or 240 vac coil, if you want to have minimum wiring change. This can be bought mounted in an enclosure. How would you like this to mount?

https://www.functionaldevices.com/products/building-automation/details/RIB01P30/
RIB01P30 is one example. I think it could mount on an electrical box if rain was not a factor.

I am not a pro.

Thanks. I am going to have a waterproof enclosure mounted on a pedestal by the well. I'm getting a Grundfos 10S10-15, and a note in the literature said that Grundfos SP pumps needed to have a control box, but looking closer at the table, so I originally thought I was going to need a control box; but looking closer at table (attached), I saw that the pump I'm getting does not need the control box. My electrician said he needed a 10x10 junction box, and I'll ask him if he needs that in addition to the enclosure for the relay or if the enclosure for the relay can handle the j-box functions too.

 

[Reach4]

The numbers in the midst of the table are GPM.

I'm getting a Grundfos 10S10-15,

10S10-15 can be a 2-wire or 3-wire.

Grundfos 91595155 is a 2-wire 10S10-15
91545155 is a 3-wire 10S10-15 , and needs a control box.

 

[Jim Goodman]

Mine is 2 wire.

 

[Reach4]

Click inbox, above.

 

[Greenmonster123]

Irrigation pump start relays are rated for outdoor use. You would just need to install a 24v transformer near your pressure switch

 

[Jim Goodman]

Irrigation pump start results are rated for outdoor use. You would just need to install a 24v transformer near your pressure switch

Thank you.