Pail Changing - Graco Therm-O-Flow 20 EasyKey Instructions Manual

Pail Changing

Follow the procedure below to change the pail on a fully
heated machine.
CAUTION
Be sure to reload the empty supply unit with a full
pail of material immediately. Do not raise the ram
and remove the platen from the empty pail until you
are ready to immediately install a new pail.
Do not raise the ram and remove the platen from
the empty pail unless the supply unit is at full
operating temperature. Pail changes can only be
performed when the system is heated.
Do not use a pail of material that has been dented
or otherwise damaged; damage to the platen wiper
can result.
No Pail Low/Empty Sensors
The pump will cavitate. Shut off the air motor immedi-
ately.
With Pail Low/Empty Sensors
"Drum Empty" will appear in the EasyKey status bar.
The air motor will shut off and the heat will continue to
be applied for approximately 1 hour. The pump icon will
flash in the status bar. If the light tower kit is installed a
flashing yellow light indicates that the pail is empty and
ready to change. In a tandem system a flashing red light
means that both pails are empty and the system has
shut down.
In a Tandem system, after a pail change has
occurred on the inactive unloader, pressing the
Pump Ready
to the air motor to allow for the pump to be primed.
The inactive unloader must be within its warning
deviation setpoints and in the Ready or Heat On
state. If the five minute timer runs out before the
inactive unloader is primed, pressing the Pump
Ready key again will repeat the air to the air motor.
312094K
key will allow five minutes of air
1. Place the ram UP/DOWN lever in the UP position.
2. Dial ram up regulator pressure to 0 psi.
Excessive air pressure in the material pail could
cause the pail to rupture, causing serious injury. The
platen must be free to move out of the pail. Attempt-
ing to change a pail when the supply unit is cold could
result in injury, damage to the equipment, or rupture
of the material pail. Never use pail blow-off air with
cold adhesive or a damaged pail.
Positive pressure is released from the pail when the
platen seal is pulled clear.
3. Adjust the platen blow-off air regulator (T) to 20-30
psi (138-207 kPa, 1.4-2.1 bar).
T
Operation
TI8141A
T
TI8142A
29