E-Flo Plus Calibration
10
311596A
Autotune the Motor
Refer to the User’s Guide by Control Techniques for
complete autotuning instructions.
1.
Decouple motor from gearbox. Secure motor to pre-
vent it from jumping during autotuning.
2.
Apply power to motor. Motor will rotate during auto-
tuning. Keep clear of motor shaft and moving parts.
3.
Navigate to Pr 5.12 and set its value to 2.
4.
Apply Run command, see page 19. Autotuning will
begin.
5.
When motor stops turning, check that Pr 5.17 and
Pr 5.24 are set to non-zero values. This indicates
that the autotune was successful.
6.
To save motor parameters, navigate to Pr 5.00, set
its value to 1000, and press the red Stop/Reset but-
ton. The number 1000 will automatically change to
0, indicating that the parameters have been saved.
1.
Pressure Sensor Calibration
Pressure sensor information (Pr 20.34, 20.35, and
20.36) for your system must be keyed into the Vari-
able Frequency Drive before system start-up.
To prevent accidental change of pressure sensor cali-
bration parameters, they are locked by Pr 20.16. To
enter calibration parameters, perform the following
steps:
a.
Set Pr 20.16 to 777, to unlock pressure sensor
parameters.
b.
Enter calibration parameters Pr 20.34, 20.35,
and 20.36.
c.
Set Pr 20.16 to 0 to lock pressure sensor
parameters.
If pressure sensor is part of the system (EPX1XX –>
Fourth Digit = 1), calibration information is printed on the
label located on the circuit board cover. If the system
was purchased without a Circuit System Kit (Graco P/N:
15J755) but one was installed later, affix the label
(included with the kit) to the circuit board cover and
enter calibration information into the VFD.
Calibration Parameters from the label:
Pr 20.34 – Zero Calibration
Pr 20.35 – Calibration Pressure
Pr 20.36 – High Calibration
2.
Pump Lower Size Selection
Parameter Pr 20.03 is reserved for the Lower size cali-
bration information listed on the unit’s identification
plate:
EPXX1X => Pr 20.03 = 1000
EPXX4X => Pr 20.03 = 1000
EPXX2X => Pr 20.03 = 1500
EPXX5X => Pr 20.03 = 1500
EPXX3X => Pr 20.03 = 2000
EPXX6X => Pr 20.03 = 2000
3.
High Pressure Alarm Setting
The High Pressure Alarm setting is controlled by param-
eter Pr 20.09. The default setting is 300 psi. Refer to
Menu 20 parameter table to determine maximum allow-
able setting for a given Lower size. The High Pressure
Alarm (#40) becomes active when system pressure
reaches the pressure setting in Pr 20.09.
The motor shaft will rotate during autotuning. Keep
clear of moving parts.
IMPORTANT: Pressure sensor information for your
system is listed on the label attached to the pump
gearbox circuit board cover.
CAUTION
Pressure sensor calibration information must be
entered into the VFD. Failure to do so will result in
Pressure Sensor Calibration Trip (#50), nuisance
trips, or system malfunctions.
