Graco 220-569 manual Operation Air-PoweredPumps, Starting and Adjusting the Pump, Shutdown

Operation (Air-Powered Pumps)

Starting and Adjusting the Pump

1.Charge the surge tank, if you are using one. See the separate instruction manual, 307–707.

2.Open all shutoff valves (D).

3.Open the dispensing valve/spray gun at the last gun station and keep it open while starting the pump.

4.Open the bleed-type master air valves (M).

5.Adjust the air regulator (L) to the minimum pres- sure necessary for the pump to cycle slowly.

6.When fluid is flowing smoothly from the gun, release the gun trigger.

7.One at a time, open any other guns in the system to purge air from the lines.

8.Adjust the pump runaway valve (P) according to the instructions supplied with it.

9.Adjust the lubricator (N) according to the instruc- tions supplied with it.

NOTE: In a circulating system, the pump operates continuously until the power supply is shut off. In a direct supply system, the pump starts when the gun/ valve is opened, and stops when the gun/valve is closed. The pump always stops on the downstroke due to the vented inlet seat (32).

WARNING

COMPONENT RUPTURE HAZARD To reduce the risk of overpressurizing your system, which could cause component rupture and serious injury,

never exceed the specified maximum air input pressure to the pump (see Technical Data on pages 40–45).

Shutdown

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 12.

Relieve the pressure.

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