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Description of choice:
Disable the pump or pumps that needs to be taken out
of operation. Please be aware that removing pumps
can make it impossible for the remaining pumps to
keep up the system pressure at the desired level.
Quick Menu 35 Par. 720 Pump running hours
Par. 720 Pump running hours
(PUMP RUN. HOURS)
Value:
0.0 hours - 999999.9 hours
Function:
As described in the beginning of this document, it
is possible to choose modes, where staging and
destaging is determined by the running hours of the
pumps (LRHIMRHO). In this parameter it is possible
to adjust the recorded running hours.
Please note, that the AUX pump will be no. 8 in the
display of the LCP, even if it is pump no. 7 in the system.
Description of choice:
Adjust the running hours of the pumps.
Feedback transmitter wiring
Terminal 12 and 13 of the VLT provide access to a
24 VDC, 200 mA power supply. This can be used
to power remote transmitters, so an external power
supply is generally not needed. The diagrams below
show how to wire two- and three-wire transmitters.
Single 4 - 20 mA feedback transmitter
connection (default setting)
108
VLT® 7000 Booster
Programming:
Parameter
Parameter
Number
Description
415
Ref./FDBK UNIT
413
MIN. FEEDBACK
414
MAX. FEEDBACK
308
AI [V] 53 FUNCT.
311
AI [V] 54 FUNCT.
314
AI [mA] 60 FUNCT.
315
AI 60 SCALE LOW
316
AI 60 SCALE HIGH
Programming:
Parameter
Parameter
Number
Description
415
Ref./FDBK UNIT
413
MIN. FEEDBACK
414
MAX. FEEDBACK
308
AI [V] 53 FUNCT.
309
AI 53 SCALE LOW
310
AI 53 SCALE HIGH
314
AI [mA] 60 FUNCT
In the display line 3 in the LCP the user is given
information on which pumps are running and
which one is the lead pump.
If the system contains more than 4 pumps the status
is like in the below example which shows a system
with fixed lead pump containing 7 pumps in total. That
means 1-7 indicates the pump numbers.
When up to 4 pumps are available, the pump
number is also shown:
MG.70.A1.02 - VLT is a registered Danfoss trademark
Parameter
Value
Process unit
Transmitter low limit
Transmitter high limit
NO OPERATION
NO OPERATION
FEEDBACK
4 mA
20 mA
Parameter
Value
Process unit
Transmitter low limit
Transmitter high limit
FEEDBACK
0 V
10 V
NO FUNCTION
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