Graco HFRL, Setup And Operation Manual

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Appendix H- Circulation
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While the pumps are moving material in circulation
mode, the main run screen will appear as shown below:
Just like any Operator mode dispense, the user has the
option to change the flow rate of circulation, without
stopping the pumps. To do this, the user must change
the flow rate set point value, as shown below.
Fully Automatic Circulation
Feature Operation
This feature (available in April 2019, on logic versions
1.11.001 and later) transitions between dispense and
circulation modes automatically without stopping the
pumps. Therefore, the button sequence described in
the previous section is executed automatically for the
user. This feature will operate best when dispensing
from the dispense valve in flow mode. The user can cir -
culate the materials at a flow rate different than the dis -
pense rate. If dispensing in constant pressure mode,
the pumps will stop momentarily during the transition
periods. This feature is NOT available if dispensing
using a manually or externally controlled dispense valve
(P2/Fusion valve option).
This feature also allows the user to operate the circula -
tion feature in Shot, and also in Sequence modes if
using logic version 1.11.003 and later. Therefore,
pre-calculated shot amounts (weights, volumes or time
increments) can be dispensed automatically by trigger -
ing the footswitch while the material is circulating.
To turn this feature ON, the Auto Circulate Between
Dispenses option must be checked, as shown below.
F
IG
. 33: Operator Mode Run Screen while Manually
Circulating Material.
F
IG
. 34: Changing Flow Rate for an Active Circulation
Operation
F
IG
. 35: Fully Automatic Circulation Feature ON