Graco 313539F Spray Adjustments, Cycle Count Key/LED, Hydraulic Pressure Control Knob

Spray Adjustments

Cycle Count Key/LED

Press to display cycle count.

NOTE:

To clear counter, press and hold for 3 sec.

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.

•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.

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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 FIG. 3, page 11.

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 313539F