Repair
Repair
Repairing th
is equipment requires access to parts
that may caus
e electric shock or other serious
injury if wor
k is not performed properly. Be sure to
shut off all p
ower to equipment before repairing.
Before Beginning Repair
NOTICE
Proper sys
tem setup, startup, and shutdown
procedure
s are critical to electrical equipment
reliabili
ty. The following procedures ensure steady
voltage. F
ailure to follow these procedures will
cause vol
tage fluctuations that can damage
electric
al equipment and void the warranty.
1. Flush if n
ecessary. See Flushing, page 52.
2. See Shutd
own, page 50.
Flush Inlet Strainer Screen
The inl
et strainers filter out particles that can plug the
pump in
let check valves. Inspect the screens daily as
part o
f 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
Clea
n the A-side screen only during
dail
y startup. This minimizes moisture
con
tamination by immediately flushing
out
any isocyanate residue at the start of
dis
pensing operations.
1. Close the fluid inlet valve on the y-strainer 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 o—ring
(B) and replace as required.
4. Ensurethepipeplug(D)isscrewedintothe
strainer plug (C). Install the strainer plug with the
screen (A) and o—ring (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.
333024N 53
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