Graco 2525DD, Instructions Manual

Page: 12 / 42

12
OPERATING INSTRUCTIONS
Priming the Pump
It is essential to prime the pump on initial start-up and
each time the water supply is disconnected from the
unit after initial use.
1. Lay the high pressure hose out to remove any loops.
Water flow will constrict the hose, creating tight loops
if the hose is not straight.
Note: The nozzle assembly should not be connected
to the gun assembly at this time. See “Nozzle Connec-
tion” pg. 9.
2. With the trigger gun locked in the “OFF” position, turn
the water supply completely on. Pointing the gun in a
safe direction, unlock the trigger gun and squeeze the
trigger.
Low pressure water will begin flowing from the hose/
gun assembly. 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, release the trigger and lock
the gun in the “OFF” position. Securely connect the
nozzle assembly. (See “Nozzle Connection” pg. 9)
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.