LA 302 Pressure Controller Manual.pdf - 第12页
Safety 1-6 SIG05_EN_A_0100 2000 Nordson Corporation Ma intenance / Repai r Allow only qualified personnel to perform the procedures described in this document. Wo rk should only be carried out on a completely depressuriz…
Safety
1-5
SIG05_EN_A_0100
2000 Nordson Corporation
Less-obvious Dangers
WARNING: An operator or service technician working with the equipment
should be aware of the less-obvious dangers that often cannot be
completely minimized at production sites:
Pressurized system components
Exposed surfaces of the unit which cannot be practically safeguarded.
They may be hot and take time to cool after the unit has been operating.
The possibility that electrical potentials may remain in the system after
the system was de-energized
Liquid adhesive vapors or hot melt material and vapors
Hydraulically or pneumatically operated system components
Uncovered winding parts
Danger of Burns
Contact with hot melt materials or hot areas of the unit may produce a
severe skin burn.
WARNING: Hot! Risk of burns. Wear heat-protective clothing, safety
goggles, and/or heat-protective gloves depending on the symbols shown.
Be extremely careful when using hot melt material. Even solidified
material may still be very hot.
Always wear protective clothing which safely covers all exposed parts of
the body.
In case of burns:
Immediately cool affected skin areas using cold, clean water.
Do not forcefully remove hot melt material from the skin.
Immediately seek medical attention.
Safety
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Maintenance / Repair
Allow only qualified personnel to perform the procedures described in this
document. Work should only be carried out on a completely depressurized
system, following all safety procedures.
WARNING: Some voltage is still present in the control cabinet even after
equipment has been turned off at the main switch. Complete the following
steps prior to maintenance or repair:
Disconnect external power supply.
Lock out external power supply.
Check no voltage is present.
Ground and short.
Cover nearby live sections.
Secure pneumatically- and hydraulically-operated equipment against
uncontrolled movement.
Only use genuine Nordson parts.
Liquid Adhesive
NOTE: Depending on the configuration of the liquid adhesive application
system, high pressure may remain between application head and pressure
regulator or pump even after the system has been switched off using the
main switch or the emergency stop. This especially applies to multi−hose
configurations between pumps and application heads.
Prior to maintenance and repair work it is therefore essential to ensure
that all liquid adhesive application system components are
depressurized as follows:
1. Release input pressure in front of pump by shutting off customer
compressed air supply.
2. Release any remaining system pressure behind the pumps by
manually operating the application heads.
Switch off system electrically.
If liquid adhesive application system is left idle for extended periods (e.g.
overnight or long breaks) Nordson recommends applying Vaseline to the
application head nozzles to prevent them from drying out and becoming
blocked as a result.
Hot Melt Material
Follow the specific instructions provided in this manual to relieve the
system pressure in the entire unit.
Always use tools with insulated handles when removing or installing
components.
Safety
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Cleaning
NOTE: Always refer to the manufacturer’s Material Safety Data Sheet or
material information sheet before working with any cleaning fluids.
WARNING: Never clean any aluminum part or flush any system using
halogenated hydrocarbon fluids. Examples of common halogenated
hydrocarbons are: dichloromethylene, 1,1,1-trichloroethylene, and
perchloroethylene. Halogenated hydrocarbons may react violently with
aluminum parts.
WARNING: Fire, open flame, and smoking are prohibited when cleaning
fluids are used. Observe all explosion prevention regulations. Cleaning
fluids may only be heated using temperature-controlled and
explosion-protected heaters.
Never use an open flame to clean the system or its components.
Ensure sufficient room ventilation to draw off vapors.
Liquid Adhesive
Check that (warm) water can be used to clean the liquid adhesive
system components, possibly with the addition of household
washing−up liquid. If this is not possible, use only the cleaning fluid
stated in the liquid adhesive manufacturer’s information. If the
manufacturer recommends heating the cleaner, note the flash point.
Disposal must be according to the waste key in the DIN Safety Data
Sheet. Liquid adhesives or residue, solvent or separating agents must
not be released into open waterways. In the case of a leak or spillage,
contain liquid and if necessary use an absorbant material e.g. sawdust
to soak it up; then proceed according to the relevant waste disposal
regulations.
If the liquid adhesive application system is to be idle for an extended
period, the entire system should be flushed and outlets sealed with
Vaseline. Warm water is usually used to flush application systems with
which water based liquid adhesives are processed.
If the liquid adhesive manufacturer specially recommends a flushing
agent, the manufacturer’s safety and disposal details must be followed.
Hot Melt Material
Use only cleaning fluids designed or intended to be used with the hot
melt material being used in the unit. Never use paint fluids under any
circumstances.
Note the flash point of the cleaning fluid used. Only use a controlled
heating method to heat fluids.