Dosing Pumps

[willper]

As a new user to the Apex Controller, I was wondering what the programming would be to run 2part dosing. I have two dosers that are set in alk and cal solution. They are plugged into outlets 4 & 8. The time starts ok, but sometimes shuts off a minute after it is suppossed to or last week was on for two hours before I noticed both still on. The outlets are set as shown:

ALK

Fallback OFF
Set OFF
If Time 07:50 to 07:55 Then ON

CAL

Fallback OFF
Set OFF
If Time 07:56 to 08:01 Then ON

Thanks in advance for your help.

Will

 

[bazineta]

Strange, it sounds as if the outlets didn't shut off, which is a standard complaint with very small loads such as dosing pumps on the other outlets, but 4 and 8 should be ok. You might try adding an additional load to those outlets as a sanity check.

One other thing I would suggest is dosing less more frequently, rather than just once during the day, and putting more time between each part in order to reduce the risk of precipitate. Here's my Alk and Cal:

Alk:

Fallback OFF
OSC 030:00/000:15/029:45 Then ON
If pH > 08.35 Then OFF
If Outlet SumpPump = OFF Then OFF

Cal:

Fallback OFF
OSC 000:00/000:20/059:40 Then ON
If pH > 08.35 Then OFF
If Outlet SumpPump = OFF Then OFF

Basically, that's alkalinity every hour on the half hour for 15 seconds, and calcium every hour on the hour for 20 seconds (my calcium pump runs a bit slower than my alkalinity pump), both only if the pH is under 8.35, and only if the main pump is running.

 

[cm11599ps]

Can you put an off statement a minute or two after your desired off time?

 

[swearint]

Can you put an off statement a minute or two after your desired off time?

His code is correct as is, although I agree with bazineta about spreading it out. So if it is not working, there is some other issue. He should test it manually to see if the relay is sticking.

Todd