Good morning ... I have been asked by a local customer to install a peristalitic pump on a commercial bottle washer and need it to run for 5-7 seconds when the start button is pushed while the machine is filling up with water. I am considering using the GRT8-B1 Power OFF delay time relay but need to confirm that if I wire the start button circuit to the trigger wire on the relay that it will start the relay as it should. All control circuits on this machine are 110 volt other than the pump motors and heating elements which are 220. Thanks in advance. DB

 

Seems OK if you want to achieve this.
Just be careful which signal/supply you want to switch. Is it the pump only? Then you should place this on the pump power supply. If you make off-delay on the start button I cannot tell what would happen since we don't completely know what that signal does inside the machine.

 

It seems that actually the detergent pump should run only during the wash-fill cycle, and not during the rinse fill cycle. So is there a timer that sequences the machine, or is it a string of timers for each program segment?
You might be able to add another contact to the start button just to initiate the detergent add function once each wash sequence.

 

As Mister Bill mentioned, we do not know the exact wiring of the machine, and how is it controlled, does it have some PLC/Microcontroller?
I really like the idea of adding another contact to your switch. If I understand correctly, you want to run the pump BEFORE the wash cycle begins? While the machine is filling with water? In that case changing the switch from single pole to double pole, or if that is not possible, adding a DPDT relay after the switch COULD work (where one pole does the same function as the switch and the other one starts the pump).
But after reading your post and thinking about it, you want the pump to run while the machine is filling with water. Is the pump using the same water that is filling? Then you might lack water inside the machine for the rest of the process. I mean you can try all these things, I dont think any physical/electrical harm can be done, just be careful not to interfere the rest of the cycle.

 

A caution is that if the start button drives a common electrically held relay arrangement, the load side of the button will stay active when the button is released, and that may cause the timer to constantly cycle.

 

Seems OK if you want to achieve this.
Just be careful which signal/supply you want to switch. Is it the pump only? Then you should place this on the pump power supply. If you make off-delay on the start button I cannot tell what would happen since we don't completely know what that signal does inside the machine.

Hi meth ... Yes this is the relay I have on order and believe that it should work as shown in the video. I will get it wired up and test sometime later next week. Thanks!

 

It seems that actually the detergent pump should run only during the wash-fill cycle, and not during the rinse fill cycle. So is there a timer that sequences the machine, or is it a string of timers for each program segment?
You might be able to add another contact to the start button just to initiate the detergent add function once each wash sequence.

Yes I want to add a pump for a chlorinated alkaline cleaner or the first cycle on this machine. the original configuration was a pre-wash cycle, a wash/sterilization cycle and then a rinse cycle. I just want to add a new pump to the first cycle. Thank you MisterBill2.

 

A caution is that if the start button drives a common electrically held relay arrangement, the load side of the button will stay active when the button is released, and that may cause the timer to constantly cycle.

The push start button has a momentary 110 volt power supply only that activates a microcontroller on a circuit board in the main panel that starts the inlet water supply, starts a timer for the wash pump cycle circuit and timer to complete a pre-wash, wash and rinse cycles. I think the dealy off timer I mentioned should work