I am also an engineer (metallurgical) with 23 years experience.
I want to wire two tanks with pumps and float switches.The datasheet for the two 110 VAC submersible pumps (model# XXXXX) say they use 0.22 amps. Other information says 26.5 watts.The specifications for the float switches are:contact rating 10 watts maxswitching voltage 110VDCswitching current 0.5 amps maxbreakdown volatage 220VDC maxcarry current 1 amp maxcontact resistance 100 ohms maxAre relays required or can I use the float switches directly?Can you provide a wiring diagram? Here is what I want it to do:Tank A pumps into Tank B.Tank A has a float switch that turns off Pump A when the Tank A level is LOW.Tank B has a float switch that turns off Pump B when the Tank B level is LOW.Tank B has a float switch that turns off Pump A when the Tank B level is HIGH.Thanks.
Sorry I wasn't clear. This is a hydroponics setup. There are 3 tanks and two pumps.
Water drains by gravity into Tank A.
Pump A in Tank A pumps to Tank B.
Pump B in Tank B pumps to Tank C.
When the level is low in Tank A, its low level switch should turn off Pump A to prevent pumping dry.
When the level is low in Tank B, its low level switch should turn off Pump B to prevent pumping dry.
When the level is high in Tank B, its high level switch should turn off Pump A to prevent overflowing Tank B.
The system is one big loop. I'm moving 1000+ liters between 3 tanks with a capacity of 1500 liters. The problem is that because Tank C drains intermittently (and randomly) into Tank A, it is possible for water to be pumped from Tank A into Tank B faster than it can be pumped out of Tank B into Tank C. This causes Tank B to overflow.
If all 3 pumped continuously, no float switches would be necessary.
I know my system description is confusing, but the plumbing is rather irrelevant, I'm just looking for 2 wiring diagrams - one for a pump with one low level float switch and another for a pump with high and low level float switches.
Low Level Switch A (Normally Open) turns ON Pump A when it closes.
Low Level Swich B (Normally Open) turns ON Pump B when it closes.
High Level Switch C (Normally Open) turns OFF Pump A when it closes. Switch C needs to override Switch A.
No, high Level Switch C (Normally Open) turns OFF Pump A when it closes. Switch C needs to override Switch A.