•
Auto (the pump is controlled automatically)
•
On (the pump is running)
•
Off (the pump is stopped).
Pump 2
Possible settings:
•
Auto (the pump is controlled automatically)
•
On (the pump is running)
•
Off (the pump is stopped).
The Auto/On/Off input on CU 362 and IO 351B has the
highest priority.
CU 362 can only start and stop the pumps automatically if
the digital inputs on CU 362 and IO 351B are set to "Auto"
or the digital input for Auto/On/Off is not used.
Path:
Operation > Pump control
2-1_PUMP_CONTROL_037
Pump control
Warning
If the pump is set to "On", all pump protection and safety
settings are disabled (except the motor protector).
Warning
If the pump is set to "Off", the float switch and other
system functions are disabled.
6.2 Start and stop levels
This display allows the user to set the stop and start levels for the
pumps in the system as well as the overflow level, high level, dry-
running level and foam-draining level.
If the "Start level variation" function is enabled, "Start level
1" is shown in this display.
See section about start level variation.
If alternation has been disabled, the pumps are numbered
according to their position. "Start level 1" and "Stop level 1" apply to
the pump connected as number 1 in the system.
In connection with alternation, this one-to-one rule does not apply.
This means that the lowest level always starts one pump and the
next level starts the other pump.
In connection with alternation, the number of operating hours is
distributed equally between the two pumps.
The system ensures that the below rules are observed by
automatically adjusting the other levels accordingly to meet the
rules:
•
The alarm level must be higher than the lowest start level and
lower than high level.
•
The pump start level must always be higher than the stop level
of the same pump.
•
The dry-running level is always lower than the lowest stop level.
At the overflow level, the water runs over the edge of the pit or into
an overflow channel. The overflow level typically lies between the
highest start level and the edge of the pit.
If, in addition to the level sensor, the system incorporates a high-
level float switch and/or a dry-running float switch, this must be
selected. See section about float switch functions.
In the pit, the high-level float switch must be physically installed
above the level indicated as high level, otherwise "Conflicting
levels" and "Level sensor" alarms are triggered.
The dry-running float switch must be physically installed below the
level indicated as dry-running level, otherwise "Conflicting levels"
and "Level sensor" alarms are triggered.
When the high-level float switch is activated, it triggers a high-level
alarm. All pumps start, but the number of starting pumps depends
on the number of pumps in each pump group.
For the purpose of emergency operation in the event of a defective
sensor, the time from the deactivation of the high-level float switch
to the stopping of the pumps can be set. The length of this time is
best found by trial and error, as it depends on the actual amount of
water the pumps are capable of moving. See section about pump
delays.
Example
Select the level to be changed, and use the [Plus] and
[Minus] buttons to select the new value. Press [OK] to save the new
value.
The display shows the current settings of the following:
•
Overflow level
•
High level
•
Alarm level
•
Start level 1
•
Stop level 1
•
Start level 2
•
Stop level 2
•
Dry-running level.
Path:
Operation > Start and stop levels
2-2_ST
AR
T_AND_ST
OP_LEVELS_045
Start and stop levels
Display text
Description
Overflow level
When this level is reached, the water runs over
the edge of the pit or into an overflow channel.
This level triggers an overflow alarm.
High level
This level indicates high water level. When this
level is reached, the system attempts to start both
pumps (the number of pumps can be limited).
Alarm level
An alarm level triggers an alarm, if desired. See
section about system alarms.
Start level 1
This is the lowest start level. At this level, the first
pump starts (not necessarily pump 1, it depends
on if the pumps have been enabled for alternating
operation).
See section about primary settings.
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English (GB)
