Maintenance
312396D
7
Maintenance
Flushing
NOTE:
•
Flush before changing materials, before fluid can
dry in the equipment, at the end of the day,
before storing, and before repairing equipment.
•
Flush at the lowest pressure possible. Check
connectors for leaks and tighten as necessary.
•
Flush with a fluid that is compatible with the fluid
being dispensed and the equipment wetted
parts.
1.
Record the pressure adjustment setting of the regu-
lator before flushing.
2.
Shut off the pump and relieve fluid pressure in the
system by triggering the dispense valve.
3.
Never exceed the maximum working pressure of the
lowest rated system component.
4.
Open the fluid regulator by turning the adjusting
screw (16) fully clockwise.
5.
Supply flushing material to the system. Set pump to
the lowest possible pressure, and start pump.
6.
Flush until thoroughly clean.
7.
Adjust the fluid regulator to return to the desired
fluid pressure setting.
NOTE: Do not allow material or flushing material to
set in the system for a long time. Fluid could dry on
the piston, causing leakage at the piston packing. If
leakage occurs, disassemble and clean the regula-
tor.
Cleaning
When changing materials, the regulator should be dis-
assembled and cleaned. Regular cleaning and inspec-
tion, and lubrication of the piston (7) and piston packing
(12) are necessary to keep the fluid regulator working
properly.
1.
Relieve all the air and fluid pressure in the system.
2.
Remove the regulator from the system.
3.
Disassemble the regulator, referring to
on
page 10. Clean and inspect all parts.
Inspection Frequency
Heater
Every two weeks, check heater for proper resistance.
Resistance should be approximately 262 ohms, +
26/-13 ohms for the 240V valves. Replace heater
if necessary.
Also inspect heater when performing regular mainte-
nance procedures.
Sensor
Every two weeks, check sensor resistance. Resistance
should be 108 ohms at 70° F (21° C). Replace sensor if
necessary.
Also inspect sensor when performing regular mainte-
nance procedures.
Trapped air can cause the pump to cycle unexpect-
edly, which could result in serious injury from splash-
ing or moving parts.
NOTICE
Use special care when handling the piston (7) and seat
(5). Damage will cause poor operation and leakage.
