Albert Noel
Well-known member
we've got an alpha.d that was equipped in '99/'00 on a manroland 305+L
for the longest time we've been off of dosers, and pre-mixing fount in a bucket and dumping it into the tank.
cant seem to get the dosing working properly. at some point a doser crapped out and after replacing it, it never really worked right again. we had the new one inspected, but it is fine. the problem is, after a day or two the conductivity goes down instead of up.
the ph also goes up. so either it's not pumping in the proper amount of concentrate and alcohol replacement.. or it's pumping in too much water.
does anyone have experience with this unit? i'm trying to figure out what the incoming pressure should be at the water inlet and what the flow dials should be set at the outgoing and return valves, as well as through the dosers.
also, i've replaced both float switches... the large ball float, which i think controls the overall level of liquid in the tank (water) and the other smaller float which i think controls the dosers in relation to the amount of water in the tank.
i've also replaced a doser completely (at a price of over $2000!) both dosers are working fine (as far as i can tell!) and there are new filter bags. all the little mesh screen filters are clean (both in the dosing wands and behind the pump) as well, all the little plastic ball valves in the wands are clean. i tried troubleshooting this issue with jbenison but he is no longer on here (he was a tech/instructor with manroland, and now unfortunatly doesnt work fo them anymore)
so any help would be great.
for the longest time we've been off of dosers, and pre-mixing fount in a bucket and dumping it into the tank.
cant seem to get the dosing working properly. at some point a doser crapped out and after replacing it, it never really worked right again. we had the new one inspected, but it is fine. the problem is, after a day or two the conductivity goes down instead of up.
the ph also goes up. so either it's not pumping in the proper amount of concentrate and alcohol replacement.. or it's pumping in too much water.
does anyone have experience with this unit? i'm trying to figure out what the incoming pressure should be at the water inlet and what the flow dials should be set at the outgoing and return valves, as well as through the dosers.
also, i've replaced both float switches... the large ball float, which i think controls the overall level of liquid in the tank (water) and the other smaller float which i think controls the dosers in relation to the amount of water in the tank.
i've also replaced a doser completely (at a price of over $2000!) both dosers are working fine (as far as i can tell!) and there are new filter bags. all the little mesh screen filters are clean (both in the dosing wands and behind the pump) as well, all the little plastic ball valves in the wands are clean. i tried troubleshooting this issue with jbenison but he is no longer on here (he was a tech/instructor with manroland, and now unfortunatly doesnt work fo them anymore)
so any help would be great.
