CALPEDA MXV-E 50 - 1603 [7/16] Loading pressure
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CALPEDA MXV-E 50 - 1603 [7/16] Loading pressure

CALPEDA MXV-E 25 - 207 [7/16] Loading pressure
7
4.1. Loading pressure
Before installation check the status of the air cushion load in the
vessel. Air preloaded pressure of the vessel must be of 2/3 of the
operating pressure.
Example:
with a 3 bar operating pressure, the
vessel should have a pressure of air
preloading of 2 bar.
5. Local Control Panel (LCP)
Before using the LCP read instruction in Design Guide from
page 26 to page 32.
Connect the LCP to the connector on the inverter via the
appropriate supplied cable. The LCP is also fed when connecting
the inverter to the electrical power supply and the pump can be
switched on.
6. Starting
a) When switching on, the LCP displays the following:
0.000 (that flashes and indicates the pressure actually measured)
b) Press the DISPLAY/STATUS key
The LCP is programmed in the factory to supply the following
data:
On the first line: FREQUENCY (Hz). CURRENT (A). POWER (W)
(initially all at 0).
On the second line: the pressure read by the transducer [bar] (>0
if the hydraulic circuit is in pressure).
On the fourth line: LOCAL/STOP
c) To check the set point of the pressure set by the factory and
change it if necessary, press the QUICK MENU key. Press the “-
“key or “+” key up to 5 of 10.
The display indicates parameter 205 – MAX REFERENCE with
the relative value.
To enter in the function that permits modifications, press the
CHANGE DATA key. To confirm the modification, press the OK
key. When finished, press the DISPLAY/STATUS key again.
d) The electrical pump is switched on by pressing START button.
If it is necessary to stop the pump, press STOP button.
The inverter brings the electrical pump to the correct R.P.M. to
reach and maintain the set point of the set pressure (parameter
205). On lines 1 and 2 the values mentioned in point b) are read.
When switching the pump on for the first time, wait for the
hydraulic circuit to dispel all the air.
e) Check that the pressure reached is correct. If not, modify it by
repeating the procedure at point c) (it is not necessary to stop the
pump).
f) With the pump functioning at the established pressure, close
the inflow shutter to zero the flow.
Check that the inverter stops the pump after a short period. In this
case, the electrical pump can function without the LCP connected
to the inverter. Otherwise, stop the pump using the STOP button
and go to point 8.
7. Alarms
Refer to the Danfoss Guide, pages 99 – 102 for the general
indications regarding warnings and alarms visualized and
managed by the LCP. Those alarms specific to the application
are the following:
7.1 ALARM 2: LIVE ZERO ERROR visualized when there is an
irregularity in the signal coming from the pressure transducer.
7.2 ALARM 38: NO WATER visualized when the pump is running
dry. The software is set to make 3 attempts at re-starting after the
first alarm (parameter 405).
8. Program
The parameters set in the factory have been tested for a correct
functioning of the electrical pump with inverter. It may be
necessary to adjust them after the installation of the equipment
into the system.
If necessary, adjust the following parameters:
Parameter 428, accessible from the MENU (not the QUICK
MENU) must be increased by a few units if the inverter does not
stop the electrical pump when the flow is very low or inexistent.
Parameter 428, accessible from the MENU shows the minimum
functioning time of the FC motor. It is advisable to not reduce the
value set in the factory and it must not be set at less than 15
seconds under any circumstances.
Parameter 205, accessible also from the QUICK MENU permits
the establishing of the pressure set point.
Parameters 207 and 208, accessible also from the QUICK MENU
permit the adjustment of the acceleration and braking ramp times.
8.1. Program parameters
The software that manages the functions of the inverter has been
appropriately designed for the applications on the pumps,
therefore it differs slightly from the standard to which the
programming parameters are described in detail in the Danfoss
Design Guide from pages 36 to 81.
The list with all parameters utilised by the software with the
relative programming value can be found in the attached table
entitled MCT 10 Set-up Software. This list particularly contains
the Group parameters [4]: Special functions, from ID 420 to ID
430 (excluding ID 429 that is for reading only) utilised by specific
software and therefore not described in the afore-mentioned
Guide.
Parameters having the following ID: 147, 403, 404, 406, 407,
from 515 to 571 and 635 are instead described in the Guide, but
they are not available in the pump-based application, therefore
they are neither in the above-mentioned table nor they appear on
the LCP.
0.0Hz 0.00A 0000W
0.000
LOCAL/STOP
FEED-BACK bar
0.000
LOCAL/STOP

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4 1 Loading pressure 7 Alarms Before installation check the status of the air cushion load in the vessel Air preloaded pressure of the vessel must be of 2 3 of the operating pressure Example with a 3 bar operating pressure the vessel should have a pressure of air preloading of 2 bar Refer to the Danfoss Guide pages 99 102 for the general indications regarding warnings and alarms visualized and managed by the LCP Those alarms specific to the application are the following 7 1 ALARM 2 LIVE ZERO ERROR visualized when there is an irregularity in the signal coming from the pressure transducer 7 2 ALARM 38 NO WATER visualized when the pump is running dry The software is set to make 3 attempts at re starting after the first alarm parameter 405 5 Local Control Panel LCP Before using the LCP read instruction in Design Guide from page 26 to page 32 Connect the LCP to the connector on the inverter via the appropriate supplied cable The LCP is also fed when connecting the inverter to the electrical power supply and the pump can be switched on 6 Starting a When switching on the LCP displays the following FEED BACK bar 0 000 LOCAL STOP_______________ 0 000 that flashes and indicates the pressure actually measured 8 Program The parameters set in the factory have been tested for a correct functioning of the electrical pump with inverter It may be necessary to adjust them after the installation of the equipment into the system If necessary adjust the following parameters Parameter 428 accessible from the MENU not the QUICK MENU must be increased by a few units if the inverter does not stop the electrical pump when the flow is very low or inexistent Parameter 428 accessible from the MENU shows the minimum functioning time of the FC motor It is advisable to not reduce the value set in the factory and it must not be set at less than 15 seconds under any circumstances Parameter 205 accessible also from the QUICK MENU permits the establishing of the pressure set point Parameters 207 and 208 accessible also from the QUICK MENU permit the adjustment of the acceleration and braking ramp times b Press the DISPLAY STATUS key 0 0Hz CLOOA 0000W 0 000 LOCAL STOP_______________ The LCP is programmed in the factory to supply the following data On the first line FREQUENCY Hz CURRENT A POWER W initially all at 0 On the second line the pressure read by the transducer bar 0 if the hydraulic circuit is in pressure On the fourth line LOCAL STOP c To check the set point of the pressure set by the factory and change it if necessary press the QUICK MENU key Press the key or key up to 5 of 10 The display indicates parameter 205 MAX REFERENCE with the relative value To enter in the function that permits modifications press the CHANGE DATA key To confirm the modification press the OK key When finished press the DISPLAY STATUS key again 8 1 Program parameters The software that manages the functions of the inverter has been appropriately designed for the applications on the pumps therefore it differs slightly from the standard to which the programming parameters are described in detail in the Danfoss Design Guide from pages 36 to 81 The list with all parameters utilised by the software with the relative programming value can be found in the attached table entitled MCT 10 Set up Software This list particularly contains the Group parameters 4 Special functions from ID 420 to ID 430 excluding ID 429 that is for reading only utilised by specific software and therefore not described in the afore mentioned Guide Parameters having the following ID 147 403 404 406 407 from 515 to 571 and 635 are instead described in the Guide but they are not available in the pump based application therefore they are neither in the above mentioned table nor they appear on the LCP d The electrical pump is switched on by pressing START button If it is necessary to stop the pump press STOP button The inverter brings the electrical pump to the correct R P M to reach and maintain the set point of the set pressure parameter 205 On lines 1 and 2 the values mentioned in point b are read When switching the pump on for the first time wait for the hydraulic circuit to dispel all the air e Check that the pressure reached is correct If not modify it by repeating the procedure at point c it is not necessary to stop the pump f With the pump functioning at the established pressure close the inflow shutter to zero the flow Check that the inverter stops the pump after a short period In this case the electrical pump can function without the LCP connected to the inverter Otherwise stop the pump using the STOP button and go to point 8 7

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