LA 404-2 Pattern Controller Manual.pdf - 第12页
LA 404-2 Patt ern Control Sys tem 6 P/N 7 1 19995A 2006 Nordson Corporation LA 4 04- 2 Is sued 12/06 De-energizing the System Isolate the system (melter , hoses, guns, and optional devic es) from all power sources before…
LA 404-2 Pattern Control System
5
P/N 7119995A
2006 Nordson Corporation
LA 404-2
Issued 12/06
Maintenance and Repair Practices
Perform scheduled maintenance activities at the intervals described in
this document.
Relieve system hydraulic and pneumatic pressure before servicing the
equipment.
De-energize the equipment and all auxiliary devices before servicing the
equipment.
Use only new factory-authorized refurbished or replacement parts.
Read and comply with the manufacturer’s instructions and the MSDS
supplied with equipment cleaning compounds.
NOTE: MSDSs for cleaning compounds that are sold by Nordson are
available at www.nordson.com or by calling your Nordson
representative.
Confirm the correct operation of all safety devices before placing the
equipment back into operation.
Dispose of waste cleaning compounds and residual process materials
according to governing regulations. Refer to the applicable MSDS or
contact the authority having jurisdiction for information.
Keep equipment safety warning labels clean. Replace worn or damaged
labels.
Equipment Safety Information
This equipment safety information is applicable to the following types of
Nordson equipment:
hot melt and cold adhesive application equipment and all related
accessories
pattern controllers, timers, detection and verification systems, and all
other optional process control devices
Equipment Shutdown
To safely complete many of the procedures described in this document, the
equipment must first be shut down. The level of shut down required varies
by the type of equipment in use and the procedure being completed.
If required, shut down instructions are specified at the start of the
procedure. The levels of shut down are:
Relieving System Hydraulic Pressure
Completely relieve system hydraulic pressure before breaking any hydraulic
connection or seal. Refer to the melter-specific product manual for
instructions on relieving system hydraulic pressure.
LA 404-2 Pattern Control System
6
P/N 7119995A
2006 Nordson Corporation
LA 404-2
Issued 12/06
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)
LA 404-2 Pattern Control System
7
P/N 7119995A
2006 Nordson Corporation
LA 404-2
Issued 12/06
Tab. 1 General Safety Warnings and Cautions
Equipment
Type
Warning or Caution
HM
WARNING: Hazardous vapors! Before processing any polyurethane
reactive (PUR) hot melt or solvent-based material through a
compatible Nordson melter, read and comply with the material’s
MSDS. Ensure that the material’s processing temperature and
flashpoints will not be exceeded and that all requirements for safe
handling, ventilation, first aid, and personal protective equipment are
met. Failure to comply with MSDS requirements can cause personal
injury, including death.
HM
WARNING: Reactive material! Never clean any aluminum component
or flush Nordson equipment with halogenated hydrocarbon fluids.
Nordson melters and guns contain aluminum components that may
react violently with halogenated hydrocarbons. The use of
halogenated hydrocarbon compounds in Nordson equipment can
cause personal injury, including death.
HM, CA
WARNING: System pressurized! Relieve system hydraulic pressure
before breaking any hydraulic connection or seal. Failure to relieve
the system hydraulic pressure can result in the uncontrolled release
of hot melt or cold adhesive, causing personal injury.
HM
WARNING: Molten material! Wear eye or face protection, clothing
that protects exposed skin, and heat-protective gloves when servicing
equipment that contains molten hot melt. Even when solidified, hot
melt can still cause burns. Failure to wear appropriate personal
protective equipment can result in personal injury.
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