Cycle Count Key/Led; Hydraulic Pressure Control Knob; Motor Control Arrow Keys; Spray Adjustments - Graco REACTOR H-VR Operation

Hydraulic variable ratio, heated, plural component proportioner. for spraying polyurethane foam and polyurea coatings
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Spray Adjustments

Cycle Count Key/LED

Press
to display cycle count.
NOTE:
To clear counter, press and hold
Hydraulic Pressure Control
Knob
Use to adjust hydraulic pressure available to the hydrau-
lic drive system. Turn knob (HC) clockwise to increase
pressure and counterclockwise to decrease pressure.
Use hydraulic pressure gauge (HP, page 11) to view
hydraulic pressure.
+
NOTE:
Component A and B outlet pressures will be higher than
the hydraulic set pressure, depending on the model.
Component A and B pressure may be viewed on the
pressure gauges (GA, GB), or the higher of the two
pressures may be displayed on the motor control panel
(MC). See F
. 3, page 11.
IG

Motor Control Arrow Keys

Use
or
to:
Adjust pressure imbalance settings, page 26.
Adjust standby settings, page 30.
Spray Adjustments
Flow rate, atomization, and amount of overspray are
affected by four variables.
16
for 3 sec.
ti7731a
ti7732a
Fluid pressure setting. Too little pressure results in
an uneven pattern, coarse droplet size, low flow,
and poor mixing. Too much pressure results in
excessive overspray, high flow rates, difficult control,
and excessive wear.
Fluid temperature. Similar effects to fluid pressure
setting. The A and B temperatures can be offset to
help balance the fluid pressure.
Mix chamber size. Choice of mix chamber is based
on desired flow rate, fluid viscosity, and selected
ratio.
Clean-off air adjustment. Too little clean-off air
results in droplets building up on the front of the
nozzle, and no pattern containment to control over-
spray. Too much clean-off air results in air-assisted
atomization and excessive overspray.
-
313539F

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