Pressure Relief Procedure - Graco ProMix PD2K Repair Parts Manual

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 pressurized fluid, such as skin injection,
splashing fluid and moving parts, follow the
Pressure Relief Procedure when you stop spraying
and before cleaning, checking, or servicing the
equipment.
Without Color Change
NOTE: The following procedure relieves all fluid and
air pressure in the system.
1. Turn off the supply pumps. Open the drain valve
on the supply line fluid filter to relieve pressure
in the supply line.
NOTE: If your system does not include a drain
valve on the supply line, set the mix manifold
to SPRAY and press
and B dosing pumps a couple of times to drain
the pumps.
2. Press Standby
relieve pressure.
3. Set the mix manifold to FLUSH. Flush the mix
manifold and gun. See Flush Mixed Material in
the PD2K Operation Manual.
4. Shut off the solvent supply pump. To relieve
pressure, press Purge
the gun. Press Standby
pressure is relieved, to avoid getting a Purge
Incomplete alarm.
NOTE: If pressure remains in the solvent line
between the solvent supply pump and the solvent
valve, VERY SLOWLY loosen a fitting to relieve
pressure gradually.
3A2800B
. Cycle the A
. Trigger the gun to
and trigger
when
With Color Change
NOTE: The following procedure relieves all fluid and
air pressure in the system.
1. Turn off the supply pumps. Open the drain valve
on the supply line fluid filter to relieve pressure in
the supply lines. Do this for each color.
NOTE: If your system does not include a drain
valve on the supply line, set the mix manifold to
SPRAY and press
B dosing pumps a couple of times to drain the
pumps. Repeat for each color.
If you are using a high pressure gun, engage
the trigger lock. Remove the spray tip and
clean it separately.
If using an electrostatic gun, shut off the
electrostatics before flushing the gun.
2. Set the mix manifold to SPRAY. Trigger the gun
to relieve pressure. Repeat for each color.
3. Press Purge
Hold the gun trigger open after the solvent valve
shuts off to relieve all pressure.
4. Set the system to Recipe 0 to flush the system
from the pumps to the gun. When flushing is
complete the system will go to Standby.
5. Shut off the solvent supply pump. To relieve
pressure, press Purge
the gun. Press Standby
pressure is relieved, to avoid getting a Purge
Incomplete alarm.
NOTE: If pressure remains in the solvent line
between the solvent supply pump and the solvent
valve, VERY SLOWLY loosen a fitting to relieve
pressure gradually.
Repair
. Cycle the A and
. Repeat for each color.
and trigger
when
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