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Nema 8536 Square D Motor Starter

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Krusscher

Senior Member
Location
Washington State
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Electrician
If you can see a time the disconnect would be shut off to the well pump motor adding a aux switch to the disconnect would prevent the contactors from coming on and allowing your chlorine pump to run with the well pump disconnect off. running your chlorine coil control through the running contact on the well pump contactor makes it so it cant run if the well pump were to over load or not come in for whatever reason.
 
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Drod04Mustang

Member
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Avon Park Florida
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Industrial Electrician-Residential Electrician
Krusscher said:
If you can see a time the disconnect would be shut off to the well pump motor adding a aux switch to the disconnect would prevent the contactors from coming on and allowing your chlorine pump to run with the well pump disconnect off. running your chlorine coil control through the running contact on the well pump contactor makes it so it cant run if the well pump were to over load or not come in for whatever reason.
Click to expand...

The chlorine pump only should come on when when well is on. Never by itself. The well acts as a siphoner injecting chlorine little by litle in the 3000 gal tank.
 
K

Krusscher

Senior Member
Location
Washington State
Occupation
Electrician
Drod04Mustang said:
The chlorine pump only should come on when when well is on. Never by itself. The well acts as a siphoner injecting chlorine little by litle in the 3000 gal tank.
Click to expand...
Then you should probably have it go through and aux switch on the disconnect although there are probably very few times that disconnect would be off so its up to you. You could put a label on the disconnect saying power needs to be shut off to the motor cabinet instead and just lock the well pump disconnect in the on position.
It still needs to go through the running contacts on the well pump starter so it wont come on if the well pump contactor isn't in.
 
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Drod04Mustang

Member
Location
Avon Park Florida
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Industrial Electrician-Residential Electrician
Thanks for your help sir. Will implement this tommorow. I just found it weird that they ran 240V to the pressure switch. They only needed it to turn on the motor starter and then send a signal to the secondary motor starter for the chrlorine pump to turn on.
 
K

Krusscher

Senior Member
Location
Washington State
Occupation
Electrician
That is strange, might be something I am missing off your original drawing. If its fed with 240 delta that might make sense if L1 is your Wild Leg.
 
K

Krusscher

Senior Member
Location
Washington State
Occupation
Electrician
Sounds like the running contact on the well contactor probably has a NO and a NC. You want to run the coil for the chlorine pump through the NO side of the running contact.
You can do it the way it was before and just run it off the bottom of the well pump contactor but just know that is not how it would normally be because you would normally be using a lower voltage to control the coils.
 
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ptonsparky

ptonsparky

Tom
Location
NE (9.06 miles @5.9 Degrees from Winged Horses)
Occupation
EC - retired
Krusscher said:
Sounds like the running contact on the well contactor probably has a NO and a NC. You want to run the coil for the chlorine pump through the NO side of the contactor.
You can do it the way it was before and just run it off the bottom of the well pump contactor but just know that is not how it would normally be because you would normally be using a lower voltage to control the coils.
Click to expand...
That may be it.
 
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Krusscher

Senior Member
Location
Washington State
Occupation
Electrician
1. from the L1 on the top of your well contactor go to a fuse block
2. from the bottom of the fuse block go to the switch contact
3. from the switch contact go to your pressure switch
4. from the pressure switch go to the common on the running contact of the well pump contactor
5. also under the common on the running contact go to the well pump coil
6. from the Normally Open on the well pump running contact go to the coil of the chlorine pump
 
kwired

kwired

Electron manager
Location
NE Nebraska
Occupation
EC
Krusscher said:
If you can see a time the disconnect would be shut off to the well pump motor adding a aux switch to the disconnect would prevent the contactors from coming on and allowing your chlorine pump to run with the well pump disconnect off. running your chlorine coil control through the running contact on the well pump contactor makes it so it cant run if the well pump were to over load or not come in for whatever reason.
Click to expand...
What I see in his drawings the control power to the chlorine pump comes from well pump main circuit so there would be no control power to chlorine pump if well disconnect is off.

Presuming things are connected as shown, maybe he needs to make sure the coil is good on the chlorine pump or that the overload contact is closed on the chlorine pump if he can't get that contactor to pull in? Might be better ways of doing it but should still function as drawn.
 
kwired

kwired

Electron manager
Location
NE Nebraska
Occupation
EC
Drod04Mustang said:
Thanks for your help sir. Will implement this tommorow. I just found it weird that they ran 240V to the pressure switch. They only needed it to turn on the motor starter and then send a signal to the secondary motor starter for the chrlorine pump to turn on.
Click to expand...
They did not send 240 to the switch. They brought L1 to one side, ran the return through the on/off switch and then went to the coil of the contactor. When on/off switch is closed but pressure switch is open you will read 240 across the pressure switch though because the L2 is feeding back through the contactor coil and there is no voltage drop across the coil if there is no current flowing through it.
 
K

Krusscher

Senior Member
Location
Washington State
Occupation
Electrician
kwired said:
What I see in his drawings the control power to the chlorine pump comes from well pump main circuit so there would be no control power to chlorine pump if well disconnect is off.

Presuming things are connected as shown, maybe he needs to make sure the coil is good on the chlorine pump or that the overload contact is closed on the chlorine pump if he can't get that contactor to pull in? Might be better ways of doing it but should still function as drawn.
Click to expand...
In the original drawing the disconnect for the well pump is in between the starter and the motor not before the starter. So even witht eh disconnect off there would be power to the starters.
The chlorine pump sounds like it is pulling in just not at the right time.
 
ptonsparky

ptonsparky

Tom
Location
NE (9.06 miles @5.9 Degrees from Winged Horses)
Occupation
EC - retired
1700147011688.png
Krusscher said:
1. from the L1 on the top of your well contactor go to a fuse block
2. from the bottom of the fuse block go to the switch contact
3. from the switch contact go to your pressure switch
4. from the pressure switch go to the common on the running contact of the well pump contactor
5. also under the common on the running contact go to the well pump coil
6. from the Normally Open on the well pump running contact go to the coil of the chlorine pump
Click to expand...
This is one of many ways. You have more things to consider other than to just make it run. Study 430.

ETA: My lack of bifocals. That should be a N/O and N/C contacts at 4.
 
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