Manual And Semi-Automatic Circulation Feature - Graco HFRL Setup And Operation Manual

Appendix H- Circulation
Manual and Semi-Automatic
Circulation Feature Operation
To implement the feature, a soft key option on the main
Operator mode run screen has been added ("
as shown below.
F . 30: Main Operator Mode Run Screen, with
IG
Recirculation Option.
As illustrated in F . 30, the HFR is configured to dis-
IG
pense in constant pressure mode, which while dispens-
ing will appear similar to the screen shown below:
F . 31: Main Operator Mode Run Screen,
IG
Dispensing in Constant Pressure Mode.
110
If recirculating the material is desired, the user will need
to stop the dispense, then press the circulation option
(" "). If selected, the user will be given the option to
select a flow rate for the recirculation dispense, as
shown below. The circulation feature will only operate
"),
in flow mode, regardless of whether the user is dis-
pensing out of the valve in constant pressure or flow.
F . 32: Main Operator Mode Run Screen, with
IG
Circulation Option Selected.
The user can now circulate the material by pressing the
dispense key ("
requesting dispense from either the CGM or DGM inter-
face. A manual recirculation dispense will circulate the
materials, apply heat (if necessary), and not command
the dispense valve to open.
In addition, corresponding error generation logic is
turned off (cavitation, pressure imbalance, off ratio,
etc.) since material is not being dispensed. Also,
material counters are not incremented since material is
not being dispensed.
"), pressing the footswitch, and
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