Aleman
Senior Member
- Location
- Southern Ca, USA
We have a grease intercept where I work. This is a series of cascading pits and a sump at the end that is pumped to the city.
It has 2 pumps and 3 float switches. The original controller died, a mini Scheider PLC/smart relay. I put an Eaton controller in it that has
the same footprint. I set it up so the middle float starts the pump and the bottom switch will turn it off. The high float is an alarm. The
2nd pump will kick in if it doesn't make the bottom within a set time or if it trips an overload.
Which is one way to do it. Or...could just use it same as having the floats directly switch the contactors. Where the bottom float will run
the motor till it it switches off. The middle would start the 2nd pump, and the high is the alarm.
Not sure which would be better, but 1st method will be less short cycling. I could add another float but it's a nasty job. Not sure about
how these are set up with 4 floats but the original had that option.
I figure some of you guys have dealt with sumps so why not ask for input. I can do it either way but I am wondering how these are
usually set up.
It has 2 pumps and 3 float switches. The original controller died, a mini Scheider PLC/smart relay. I put an Eaton controller in it that has
the same footprint. I set it up so the middle float starts the pump and the bottom switch will turn it off. The high float is an alarm. The
2nd pump will kick in if it doesn't make the bottom within a set time or if it trips an overload.
Which is one way to do it. Or...could just use it same as having the floats directly switch the contactors. Where the bottom float will run
the motor till it it switches off. The middle would start the 2nd pump, and the high is the alarm.
Not sure which would be better, but 1st method will be less short cycling. I could add another float but it's a nasty job. Not sure about
how these are set up with 4 floats but the original had that option.
I figure some of you guys have dealt with sumps so why not ask for input. I can do it either way but I am wondering how these are
usually set up.