Operation; Pressure Relief Procedure; Prime The Pump - Graco High-Flo JS17A8 Instructions Manual

Operation

Pressure Relief Procedure

Follow the Pressure Relief Procedure
whenever you see this symbol.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
splashing fluid and moving parts, follow the Pressure
Relief Procedure when you stop spraying and before
cleaning, checking, or servicing the equipment.
1. Close the bleed-type master air valve (M).
2. Open the dispensing valve, if used.
3. Open all fluid drain valves (N) in the system, having
a waste container ready to catch drainage.
4. Leave drain valve(s) open until you are ready to
pump again.

Prime the Pump

Do not allow the pump to run quickly for a long period
of time as this may damage the packings.
1. Fill the wet cup with Throat Seal Liquid (TSL).
NOTE: Sealed 4-ball lowers with bellows do not
require TSL.
NOTE: During operation the TSL level in the wet cup will
fluctuate slightly at pump changeover.
2. Close pump air regulator (L) by turning the knob
counterclockwise, reducing pressure to zero. Close
the bleed-type air valve (H). Also verify that all drain
valves (N) are closed.
3A6938D
NOTICE
3. Connect air line (J) to bleed type air valve (H).
4. Check that all fittings throughout system are tight-
ened securely.
5. Connect the fluid supply line (C) from the mix tank
shutoff valve (D) to the pump.
6. Connect the fluid line (E) to the pump outlet or surge
suppressor outlet (G), if used.
NOTE: If your pump has DataTrak, see your separate
XL air motor manual for DataTrak instructions.
7. DataTrak equipped units with runaway protection
only: enable the prime/flush function by pushing the
prime/flush button on the DataTrak.
8. Open bleed-type air valve (H). Slowly turn pump air
regulator (L) clockwise, increasing pressure until
pump starts.
9. Cycle pump slowly until all air is pushed out and
pump and hoses are fully primed.
10. DataTrak equipped units with runaway protection
only: disable the prime/flush function by pushing the
prime/flush button on the DataTrak.
11. Close the fluid shutoff valve (D) downstream of the
pump. The pump should stall against pressure.
NOTE: In a circulation system, the pump operates con-
tinuously until the power supply is shut off. In a
direct-supply system, the pump starts when the dis-
pense valve is opened, and stops when the dispense
valve is closed.
Operation
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