Fluid Inlet Strainer Screen - Graco HFRL Setup And Operation Manual

Maintenance
8. After the USB stick is inserted, the short download
process may occur. After the download and inser-
tions, the screen should appear as shown below.
9. If more than one software file is located in the indi-
cated USB directory, press Enter (CF) to make the
selection of the desired file to be programmed to
the token.
10. To start the programming process, press the
soft key.
11. The transfer from the USB stick to the token will
take several minutes. After completion, the screen
should show a 100% completion and the token will
now contain the selected file on the USB stick.
12. To program the HFR with the token software, press
the key. If the token will be used for another
system, remove the token and exit the screen(s) by
pressing the Cancel key. Remember to enable the
"Enabled Downloading of USB Logs" option if pre-
viously disabled.
48

Fluid Inlet Strainer Screen

(Not included on HFRS systems)
The inlet strainers filter out particles that can plug the
pump inlet check valves. Inspect the screens daily as
part of the startup routine, and clean as required. The
standard strainer is 20 mesh.
Use clean chemicals and follow proper storage, trans-
fer, and operating procedures, to minimize contamina-
tion of the A-side screen.
NOTE: Clean the A-side screen only during daily
startup. This minimizes moisture contamination by
immediately flushing out any isocyanate residue at the
start of dispensing operations.
1. Perform Pressure Relief Procedure on page 40.
2. Close the fluid inlet valve at the pump inlet and shut
off the appropriate feed pump. This prevents mate-
rial from being pumped while cleaning the screen.
3. Place a container under the strainer manifold (59d)
to catch fluid. Remove the strainer plug (59j).
4. Remove the screen (59g) from the strainer mani-
fold. Thoroughly flush the screen with compatible
solvent and shake it dry. Inspect the screen. If more
than 25% of the mesh is blocked, replace the
screen. Inspect the gasket (59h) and replace as
required.
5. Ensure the pipe plug (59k) is screwed into the
strainer plug (59j). Install the strainer plug with the
screen (59g) and gasket (59h) in place and tighten.
Do not overtighten. Let the gasket make the seal.
3A2175Z