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Auxiliary pump/sleep mode
As can be seen in the section Operation Modes, there
is a possibility for using an AUX pump. The control
of the auxiliary pump is done with the sleep-mode
functionality. This basically means, that if a mode
Quick menu 28 Par. 711 Sleep/AUX timer
Par. 711 Sleep/AUX timer
(SLEEP/AUX TIMER)
Value:
0 - 300 sec. (301 sec. = OFF)
With AUX pump
Without AUX pump
Function:
In this parameter the Sleep mode/AUX pump
functionality is activitated. The timer starts when
the theoretical output frequency drops below the
frequency set in parameter 712 Sleep frequency.
When the time set in the timer has expired, the lead
pump will ramp to stop via parameter 207 Ramp
down time. The lead pump will restart, when the
theoretical output frequency exceeds the frequency
in parameter 713 Wake up frequency.
The theoretical output frequency can be monitored
in the LCP. Please refer to par. 007, where the
readout can be set to PID output.
Description of choice:
Select OFF if the function is not wanted. Set
the threshold value that is to activate Sleep
104
VLT® 7000 Booster
without AUX pump is selected, the sleep-mode function
will turn off the lead pump if flow demand gets low.
If a mode with AUX pump is selected the sleep-mode
function will turn on the auxiliary pump and turn off
the lead pump if flow demand gets low.
mode after the output frequency has fallen below
parameter 712 Sleep frequency.
Quick menu 29 Par. 712 Sleep/AUX frequency
150 sec.
Par. 712
OFF
(SLEEP/AUX FREQ)
Value:
Par. 201 F
frequency
Function:
When the output frequency falls below the preset
value, the timer will start the time count set in
parameter 711 Sleep/AUX timer. The present
output frequency will follow the theoretical output
frequency until fmin is reached.
Description of choice:
Set the required frequency.
MG.70.A1.02 - VLT is a registered Danfoss trademark
Sleep/AUX frequency
- par. 713 Wake up
MIN
20 Hz
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