Graco HIGH-FLO 220-569 - Manual (Page 13)

307-809 13
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.