Graco QUANTM i30 Instructions Manual page 23

Start and Adjust the Equipment
1. Follow Prepare the Equipment for Startup,
page 22.
2. Connect the equipment to a power source. See
Electrical Connections and Wiring, starting on
page 17.
NOTE: The pump will automatically start cycling if
the pump is connected to power and the control
knob (K) is not set to off (0).
3. After the alert beep sounds, allow the equipment to
complete the startup sequence. See LED Indicator
Overview, page 25.
The LED indicator light illuminates solid yellow
while calibrating. The pump cycles slowly while
adjusting and operates normally after fully
calibrating.
The system stays calibrated as long as power to
the system is connected. If power to the system is
disconnected, the system will automatically
recalibrate after power is restored.
4. Slowly increase the control knob (K) until the
equipment is operating at the set output level.
5. If flushing, run the equipment long enough to
thoroughly clean the equipment and lines.
Tips to Reduce Cavitation
NOTICE
Frequent or excessive cavitation can cause serious
damage, including pitting and early wear of wetted
parts, and may result in reduced efficiency of the
equipment. Cavitation damage and reduced efficiency
both result in increased operating costs.
Cavitation is the formation and collapse of air pockets
in the fluid. Cavitation depends on the vapor pressure
of the fluid, the system suction pressure, and the
velocity pressure. Viscous fluids are more difficult to
pump and more prone to cavitation than non-viscous
fluids.
To improve equipment efficiency and reduce the
cavitation:
1. Reduce vapor pressure: Decrease the
temperature of the fluid.
2. Increase suction pressure:
a. Position the equipment lower than the fluid
level in the supply.
3A8572B
b. Reduce the number of fittings on the suction
lines to reduce friction length.
c. Increase the diameter of the suction lines.
d. Reduce the fluid inlet pressure. An inlet
pressure supply of 3–5 psi (21–35 kPa,
0.2–0.3 bar) is adequate for most materials.
NOTICE
To avoid pump damage and inefficient operation, do
not use a fluid inlet pressure greater than 25 percent of
the outlet working pressure.
e. Increase the Net Positive Suction Head (NPSH).
See Performance Charts, page 42.
3. Reduce liquid velocity: Slow the equipment cyclic
rate.
Consider all the previously listed factors in system
design. To maintain efficiency, operate the equipment
at the lowest speed and pressure setting needed for the
required flow.
Contact your local distributor for site-specific
suggestions to improve equipment performance and
reduce operating costs.
Disable Auto-Prime
The auto-prime sensor detects fluid while the
equipment is operating. The equipment will run as long
as fluid is detected. If fluid is not detected, the
auto-prime sequence will restart.
Auto-prime is enabled by default. To disable
auto-prime:
1. Follow Remove the Control Cover, in the control
cover repair procedures in the motor manual. See
Related Manuals on page 2.
2. Locate the auto-prime switch (AP). See F
Electrical Schematics in the motor manual.
3. Push the auto-prime switch (AP) to the left (off)
position.
4. Follow Install the Control Cover in the control
cover repair procedures in the motor manual.
Operation
. 12 or
IG
23