Detailed explanation:
1 - If
‘Off’
has been selected in the menu, this function is deacti‐
vated.
2 - If
‘Periodic’
was selected in the menu, then the control unit
periodically triggers the bleed procedure with an adjustable
‘cycle’
(10 ... 1440 min = 24 h) and an adjustable
‘duration’
(5 ... 300 s = 5 min).
Bleeding is always triggered at the start of a period. A bleed
process is also started by
[ STOP/START]
or by con‐
necting the pump to mains voltage.
3 - If
‘Air lock’
has been selected in the menu, the
‘Air lock’
internal signal triggers the bleed procedure.
If the signal appears again within 8 minutes of the bleed pro‐
cedure being carried out, the control unit repeats the bleed
procedure up to a maximum of 3 times. However if the signal
still appears, then an error message is generated, which has
to be acknowledged via the
[dial]
.
In the event of an
‘Air lock’
the option of a direct error or
warning message disappears for the
‘Air lock’
signal. The cor‐
responding menu branch in the
‘Settings’
menu is also
hidden. The signal is only available for the
‘Bleed’
function.
4 - If
‘Both’
has been selected in the menu, then each trigger can
trigger a bleed process.
1. The pump control stops the normal metering operation - the
"Stop Pause" symbol appears on the LCD screen.
2. Only with bleed relay: After 1 s, the pump control opens the
bleed valve on the liquid end (via the bleed relay and the sol‐
enoid valve).
3. 1 s later, the pump starts to run at a high stroke rate (like
during priming) - the "Air lock" symbol
appears on the LCD
screen instead of the "Stop Pause" symbol.
4. The pump operates in this way for the total set time.
5. Once the set time has elapsed, the pump stops – the "Stop
Pause” symbol appears on the LCD screen again.
6. Only with bleed relay: After 1 s the pump control closes the
liquid end bleed valve.
7.
After 1 s the "Stop Pause" symbol disappears and the
pump recommences normal operation.
If the pump was in the "Stop" state at the time of triggering (
[STOP/START]
, Pause, Error), the start of the bleed procedure is
delayed - until this state has been cleared.
If the pump switched to "Stop" state during the bleed procedure,
the pump control jumps immediately to phases 5 and 6. - see
above. This definitely cancels the bleed procedure. As soon as the
"Stop" state is cleared, the bleed procedure starts from the begin‐
ning.
11.2.11
‘Priming time’
‘Menu / Information
è
Settings
è
Priming time
è
...’
Sequence of the bleed procedure
(automatic):
Set up /
‘Menu’
77
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