Graco 3A0592B, Instructions Manual

Page: 12 / 38

12
OPERATING INSTRUCTIONS
Priming the Pump
It is essential to prime the pump and flush the unit each
time the water supply has been disconnected from the
unit OR whenever the unit has set for any period of
time. This unit has a steel coil which, after setting, will
cause the water remaining in the coil from the previous
usage to turn brown or black. This contaminated water
must be flushed from the system before start-up. This
procedure should be performed without the high pres-
sure hose, gun and dual lance assembly installed.
Direct Feed:
1. Turn on the water supply.
2. Low pressure water will begin flowing from the water
outlet. This allows the unit to prime and purge any air
from the system. The unit is primed when water flow
is uninterrupted by air.
3. Once the unit is primed, turn off the water supply and
connect the high pressure discharge hose to the water
outlet of the unit. (Note: The trigger gun and dual
lance assembly should already be connected to the
high pressure discharge hose at this time.)
4. Turn on the water supply.
NOTICE
Be certain the nozzle is not connected to the unit
while priming the pump. Priming allows mineral de-
posits to be released from the system which would
obstruct or damage the nozzle assembly resulting in
costly repairs.