Operation; Purge System - Graco Therm-O-Flow 200 Instructions - Parts Manual

Operation

Operation
1. Turn the main power switch ON. The Graco logo will
display until communication and initialization is com-
plete.
2. Press the button. Verify the machine is in
"Warm Up" state, and that the temperatures are
increasing. Allow the system to reach the "Ready"
state before pumping. The pump will automatically
turn on, if autostart is enabled in setup screens,
when all the heat zones reach their setpoint tem-
perature.

Purge System

Purge the system before initial use and when chemi-
cals are changed to prevent material contamination,
which may cause the material to fail or perform poorly.
The system was factory- tested using a light soluble
oil, a soybean oil, or some other oil as tagged. Flush
the system to avoid contaminating the material that
has been designated for initial material loading.
28
NOTICE
Use fluids that are chemically compatible with the
equipment wetted parts. See Technical Specifica-
tions in all of the equipment manuals.
1. Select the material for the initial material load.
2. Verify whether the factory-test oil and the initial
material load are compatible:
a. If the two substances are compatible omit the
remaining steps in this procedure and refer to
Load Material, page 29.
b. If the two substances are incompatible perform
the remaining steps in this procedure to flush
the system.
3. Select a drum of material that can eliminate the fac-
tory-test oil from the system. If necessary, check
with Graco or the material supplier for a recom-
mended solvent.
4. Before purging be sure the entire system and waste
drum are properly grounded. See Grounding, page
20.
5. Turn all heat zones' setpoint temperature to the
material manufacturer's recommended dispense
temperature, or a minimum of 100°F (37°C) mini-
mum.
NOTE: Remove any dispense valve orifices before
purging. Reinstall after purging has been completed.
6. Purge the material through the system for approxi-
mately 1 to 2 minutes.
7. Remove the drum if purge material was used. See
Change Drums, page 36.
NOTICE
334130L