Repair
3A1570V 39
Fluid Inlet Strainer Screen
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.
Isocyanate can crystallize from moisture contamination
or from freezing. If the chemicals used are clean and
proper storage, transfer, and operating procedures are
followed, there should be minimal contamination 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. Close the fluid inlet valve at the pump inlet and shut
off the appropriate feed pump. This prevents
material from being pumped while cleaning the
screen.
2. Place a container under the strainer base to catch
drain off when removing the strainer plug (C).
3. Remove the screen (A) from the strainer manifold.
Thoroughly flush the screen with compatible solvent
and shake it dry. Inspect the screen. No more than
25% of the mesh should be restricted. If more than
25% of the mesh is blocked, replace the screen.
Inspect the gasket (B) and replace as required.
4. Ensure the pipe plug (D) is screwed into the strainer
plug (C). Install the strainer plug with the screen (A)
and gasket (B) in place and tighten. Do not
overtighten. Let the gasket make the seal.
5. Open the fluid inlet valve, ensure that there are no
leaks, and wipe the equipment clean. Proceed with
operation.
Temperature Display
1. Turn main power OFF . Disconnect power
supply.
2. Follow the Pressure Relief Procedure, page 15.
3. Refer to Wiring Schematics, page 55.
4. Put on static conductive wrist strap.
5. Disconnect main display cable (106) at lower left
corner of display module; see F
IG
. 17, page 40.
6. Remove screws (116) and cover (105); see F
IG
. 17,
page 40.
7. Disconnect cable connector from back of
temperature display (102). See F
IG
. 17.
8. Disconnect ribbon cable(s) (R) from back of display;
see F
IG
. 17, page 40.
9. Remove nuts (103) and plate (101).
10. Disassemble display, see detail in F
IG
. 17, page 40.
11. Replace board (102a) or membrane switch (102b)
as necessary.
12. Move jumper (119) to J1 on replacement display
board. See F
IG
. 17.
13. Reassemble in reverse order, see F
IG
. 17, page 40.
Apply medium strength thread sealant where
shown. Be sure display cable ground wire (G) is
secured between cable bushing and cover (105)
with screws (107).
F
IG
. 16: Fluid Inlet Strainer
NOTICE
Before handling board, put on static conductive wrist
strap to protect against static discharge which can
damage assembly. Follow instructions provided with
wrist strap.
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