Tandem Priming When Changing Drums - Graco E-Flo iQ Operation Manual

2. Place a waste container below the Dispense Valve
(A).
3. Ensure all fittings are secure from the Pump (AC)
out to the Dispense Valve (A).
4. While still in pump priming mode and with the target
pressure still set at 100 psi (0.7 MPa, 7 bar) and the
target flow at 25 cc/min, press, the
enter the valve depressurization mode on Pump 1.
5. Press the soft key to start the Pump (AC). This
will open the Dispense Valve (A) and allow the
pump to run at the set pressure and flow rate.
6. Increase pressure and flow targets as necessary
until a steady stream with no air flows out of the
Dispense Valve (A).
7. Press the soft key to stop the Pump (AC).
8. Press the soft key to exit the valve
depressurization mode.
9. Press the soft key to exit priming mode
Tandem Priming when Changing
Drums
When priming one ram supply unit of a Tandem system,
the other ram does not need to be stopped when you
want to change material drums. The other pump can
continue running and dispensing material.
NOTE: This can only be performed when the system is
in Remote control mode. For priming pumps in Local
mode during operation, see Priming Mode on page 41.
1. Press the soft key to change to Remote control
mode. If PLC lockout is active, the inactive pump
must be primed through the CGM.
2. Adjust the drum to make sure it is aligned with the
Platen (AD). See Prepare the Pump on page 35.
3. Open both Ball Valves (S) on the Tandem Block (R).
4. Press the soft key to switch to the currently
operating ram supply unit. The one currently
operating is highlighted in green. The Prime icon
displays the number of the other ram for priming.
333587B
5. Press the
mode.
soft key to
6. To control the flow of material, set your target
pressure and target flow in the fields that are
displayed above the line and style number. Ensure
that the target prime pressure is at least 100 psi
below current system operating pressure, but not
less than 400 psi below current operating pressure.
7. Open the Pump Bleed Valve (AM) on the ram and
place a waste container below it to catch material.
8. Press the
9. Allow adequate amount of time for air to escape the
system through the bleed valve (AM) while priming.
At least 30 seconds with no air pockets is
recommended.
NOTE: A timer shows to the left of the priming mode
icon and counts down during priming. The default is 5
minutes but can be adjusted between 1 and 9 minutes.
See Pump Screen 2 - Pump Settings on page 27.
10. When a steady stream of material with no air comes
out of the Pump Bleed Valve (AM), close the bleed
valve (AM).
11. To manually stop the priming process at any time,
press the
the process, it will automatically stop when the timer
counts down to 0:00.
NOTE: If time has expired, you must press the
key again to resume priming. Do not press the
key until you have restarted the priming process.
12. Press the
soft key to enter the pump priming
soft key to start the priming process.
soft key. If you do not manually stop
soft key to exit the priming mode.
Startup
soft
soft
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