LA 404 Pattern Control System
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Part 1037527
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Nordson Corporation
Manual 66-LA404-MA-01
De-energizing the System
Isolate the system (melter, hoses, guns, and optional devices) from all
power sources before accessing any unprotected high-voltage wiring or
connection point.
1. Turn off the equipment and all auxiliary devices connected to the
equipment (system).
2. To prevent the equipment from being accidentally energized, lock and
tag the disconnect switch(es) or circuit breaker(s) that provide input
electrical power to the equipment and optional devices.
NOTE:
Government regulations and industry standards dictate specific
requirements for the isolation of hazardous energy sources. Refer to
the appropriate regulation or standard.
Disabling the Guns
All electrical or mechanical devices that provide an activation signal to the
guns, gun solenoid valve(s), or the melter pump must be disabled before
work can be performed on or around a gun that is connected to a
pressurized system.
1. Turn off or disconnect the gun triggering device (pattern controller, timer,
PLC, etc.).
2. Disconnect the input signal wiring to the gun solenoid valve(s).
3. Reduce the air pressure to the gun solenoid valve(s) to zero; then
relieve the residual air pressure between the regulator and the gun.
General Safety Warnings and Cautions
Table 1 contains the general safety warnings and cautions that apply to
Nordson hot melt and cold adhesive equipment. Review the table and
carefully read all of the warnings or cautions that apply to the type of
equipment described in this manual.
Equipment types are designated in Table 1 as follows:
HM
= Hot melt (melters, hoses, guns, etc.)
PC
= Process control
CA
= Cold adhesive (dispensing pumps, pressurized container, and
guns)
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