One of the really frustrating things about posting here is that some simply want to bash other posters. The preceding posts are good examples.
See page 8 in the Fleck 5600 manual below. It specifically discusses how the time for cycles in the filter version vary with the piston chosen.
http://www.pentairwatertreatment.co...eatment/Manuals/5600 Service Manual 40106.pdf
You're right Bob, posting here is difficult when you post incorrect information, like this, and then refuse to accept responsibility for the error and reply with a personal attack whine.
AGAIN you are not comprehending what you are reading. The last few times it was spec sheets, now it is what choice of piston for a backwashed only filter.
So let's look at page 8. It says
CYCLE TIMES and Flow Diagrams in the setup/installation section of the 5600 valve Bob. The keyword is TIMES, meaning the time you can set the TIMER for FOR WHATEVER PISTON IS IN THE CONTROL VALVE.
Bob, what causes the piston to move or stay in one position or another if not the TIMER causing the motor to come on and then shut off?
The filter here with a mechanical backwash only 5600 filter version does not allow anyone to set or change any length of TIME of any of the cycle positions REGARDLESS of what piston is in it, period.
Below is a copy of the info on page 8... see the BLACK end plug and filter piston info Bob, that will be or should be the one in his FILTER version of the stock/standard version of the 5600 he has for an AN filter. That does not allow setting the length of time any of the cycle positions run for.
You mistakenly believe he has a choice of changing the piston, he could if he bought one
but how does he change the length of time for any of the cycle positions Bob? He'd need to buy a different version of the 5600, and the only choice is the SXT timer unless he was able to find an SE timer; either will require him to buy a new power head.
This page 8 info is for a dealer to order the piston he wants for whatever TIMER he is ordering for the type of filter (or softener) version of the 5600 he is selling.
Cycle Times and Flow Diagrams
1. In Service position. See Figure 4, page 10.
2. Preliminary Rinse position.
— Same as Figure 4, page 10 with standard piston (white end plug) or
filter piston (black end plug).
— Eliminated with low water piston (gray end plug).
3. Backwash position.
— Same as Figure 6, page 11 with standard piston.
—
15 minutes with filter piston.
— 7 minutes with low water piston.
4. Brine Rinse position.
— Eliminated, resulting in a 50 minute pause, no water flows during this time.
5. Slow Rinse position.
— Eliminated, resulting in a 50 minute pause, no water flows during this time.
6. Second Backwash position.
— Same as Figure 9, page 12 with standard piston.
—
15 minutes with filter piston.
— 7 minutes with low water piston.
7. Settling Rinse position.
— Same as Figure 10, page 13 with standard
or filter piston.
— Eliminate with low water piston.
8. Brine Tank Refill position.
— Eliminated, filter is back in service at this time.