13
6.2.4 The Flush Mode
The Flush Mode defines how the flushing cycles is triggered. The selectable options are as follows:
OFF -
No flushing will take place
By time –
In this case the flushing cycles will be repeated in a selected interval or will be triggered by the DP signal depending on what
happens first. No matter how was the flushing cycle started the interval to the next cycle will start to be measured again after
each ending of a flushing sequence. The selectable intervals are the following:
5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60
minutes
2, 3, 4, 5, 6, 8, 12, 18, 24, 72, 120
hours
dp –
Flushing will be triggered by DP only.
NOTE
If the “+” and “-“ keys are pressed and held down simultaneously the “Flush Mode” field will show the left time until next cycle, alternately
hours and minutes.
6.2.5 The Accumulations
The unit accumulates and displays the number of flushing cycles caused by DP, by time, or manually at each of the accumulation fields, the
“+” or “-“ keys may be used for clearing the accumulated value.
6.2.6 The Configuration
In order to enter into the configuration process press and hold down the ENTER key for at least 3 seconds.
The unit will detect how many “plug-in” boards (each of 2 outputs) are used in the particular case.
How will the outputs be allocated depends on the definitions made during the configuration process described below. The following rules
apply:
1.
Backflush valves will be allocated starting from output 1 and up.
2.
The last backflush valve can be cancelled and then its allocated output will be left unused.
3.
Alarm output, Delay-Valve and Main-Valve when defined, will be allocated in this
order, right after the last backflush valve (whether in use or not).
Example:
Assuming there are 3 “plug-in” boards, this makes 6 outputs for use. If there are no Alarm-output, no Delay-Valve and no Main-Valve all the 6
outputs will be allocated for backflush valves.
If additionally a Main-Valve is defined, the first 5 outputs will be allocated for backflush valves and output No 6 for the Main-Valve. Output
No 5 (of the last backflush valve) can be canceled and left unused. If additionally a Delay-Valve is defined it will be allocated to output 5
right before the Main valve, leaving the first 4 outputs for backflush valves, and once again output No 4 (of the last backflush valve) can
be canceled and left unused. If additionally an Alarm-output is defined it will be allocated before the Delay-Valve leaving only 3 of the first
outputs for backflush valves. No 3 can again be canceled.
During the configuration process the following features are defined:
Main Valve (sustaining
valve)
Yes/ No. When the answer is “Yes” the Pre Dwell delay between the Main Valve opening and the opening of
Station No. 1 can be defined.
The selectable delay steps are:
5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55 sec
1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6 min
Dwell time
the delay between stations – can be set to 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, or 60 sec.
DP delay
the delay during which the DP sensor reading is expected to remain stable before reaction – 5, 10, 15, 20, 25, 30,
35, 40, 45, 50, 55, 60 sec.
