Graco 3A2264A User Manual download pdf (Page 10)

Pressure Relief Procedure

10 3A2264A

Grounding

The equipment must be grounded. Grounding reduces

the risk of static and electric shock by providing an

escape wire for the electrical current due to static build

up or in the event of a short circuit.

Pump: use g

round wire and clamp (supplied). Loosen

grounding lug locknut and washer. Insert ground wire

end into lug slot and tighten locknut securely. Connect

ground clamp to a true earth ground.

Air and fluid hoses: use on

ly electrically conductive

hoses with a maximum of 500 ft. (150 m) combined

hose length to ensure grounding continuity. Check elec-

trical resistance of hoses. If to

tal resistance to ground

exceeds 29 megohms, replace hose immediately.

Air compressor:

follow manufacturer’s recommenda-

tions.

Dispense valve: g

round through connection to a prop-

erly grounded fluid hose and pump.

Fluid supply container: f

ollow local code.

Solvent pails used when flushing: f

ollow local code.

Use only conductive metal pails, placed on a grounded

surface. Do not place the pail on a nonconductive sur-

face, such as paper or cardboard, which interrupts

rounding continuity.

To maintain grounding continuity when flushing or

lieving pressure: hold metal part of the dispense

valve firmly to the side of a grounded metal pail, then

trigger the valve.

Pressure Relief

Procedure

NOTE: Refer to FIG. 2 on page 8 for the following proce-

dure.

1. Turn off the air motor slider valve (BF) on both ram A

d B.

2. On both ram A and B, turn off the main air slider

valve (BA). Set the ram director valve (BC) to the

down position. The ram will slowly drop.

3. Perform Pressure Relief Procedure of the HFR

system. See manual 3A2175.

4. On both ram A and B, open the drain valve and/or

the pump bleed port. Have a container ready to

catch the drainage.

If you suspect that the spray tip/nozzle or hose is com-

pletely clogged, or that pressure has not been fully

relie

ved after following the steps above, very slowly

loosen the tip guard retaining nut or hose end coupling

and relieve pressure gradually, then loosen completely.

Now clear the tip/nozzle or hose.

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Graco 3A2264A User Manual Page 10

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