Graco HFRL, Setup And Operation Manual

Page: 39 / 142

Operation
3A2175Z 39
6. Change pressure imbalance setting (optional).
The pressure imbalance function detects conditions
that can cause off-ratio dispense, such as loss of feed
pressure/supply, pump seal failure, clogged fluid inlet
filter, or a fluid leak.
The pressure imbalance default is factory-set at 500 psi
(3.4 MPa, 34 bar). For tighter ratio error detection,
select a lower value. For looser detection or to avoid
nuisance alarms, input a higher value.
a. Navigate to System Screen 3.
b. Press to enter the screen.
c. Navigate to the pressure imbalance field.
d. Type the desired pressure imbalance setting
then press Enter .
Shutdown
1. Park pumps.
a. From the Home screen, press and select
Standby mode.
b. Press . Material will dispense. Pump will
park automatically. Once pump is parked,
pump will stop moving.
If a dispense gun with a trigger is installed,
pulling the trigger will begin a park operation.
Material will dispense.
2. Press the enable/disable key on the ADM to
disable the ADM.
3. Turn main power switch (MP) to OFF position.
4. Close A (Red) and B (Blue) fluid supply valves (FV),
if equipped, or remove fluid pressure at supply
device.
5. Perform Pressure Relief Procedure on page 40.
6. Shut down feed pumps as required. See feed pump
manual.
ti9883a1
FV