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Page 52
11.6.8 Calibration low pressure
switch PS
LOW
With the help of a pressure switch between
the feed water pre-filter and the high pres-
sure pump the system inlet pressure can be
monitored. If the pressure falls below a mini-
mum pressure set on the pressure switch
during production (e.g. due to a clogged pre-
filter), production can be shut down and the
system stopped.
»
Press the arrow keys
to
select if pressure switch should be
active or inactive.
»
Confirm the selection with
. The
program jumps to submenu "7B".
By pressing the arrow keys
you set
switching direction.
N.O. CONTACT = The input functions as a
normally open contact.
N.C. CONTACT = The input works as a nor-
mally closed contact
»
Confirm the selection with
. The
program jumps to submenu "7C"
N.C. contact is set ex works here
. Do not
change this! Otherwise there is a risk of dam-
age to the system.
»
Press the arrow keys
to set
the time of delay
0 Sec = no delay
(see note at the end of the chapter)
»
Confirm the selection with
. The
program jumps to submenu "7D".
By pressing the arrow keys
you set
the number of start-up attempts (0-9).
»
Confirm the selection with
. The
program jumps to submenu "7E".
The menu item is not assigned.
Function of the startup repeats:
If the number of start-up repeats is set to "0",
the unit stops as soon as the low-pressure
monitor switches (and any delay time set has
ended). All output relays are switched off!
The display shows
If the number of start-up repeats is set to e.g.
"5", the unit stops as soon as the low-pres-
sure monitor switches (and any delay time
set has ended). The feed water valve SV1
stays activated. The display shows
7 MIN. PRESSURE
8 MAX. PRESSURE
7A LOW PRESSURE
ENABLED
7B LOW PRESSURE
CONTACT N.C.
7C INPUT DELAY
00Sec
7D MAX RETRY
0
7E ALARM WASHING
YES
SYSTEM STOPPED!
LOW PRESSURE
Содержание WL-ROL 160-1200 Series
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