LA 302 Pressure Controller Manual.pdf - 第11页
Safety 1-5 SIG05_EN_A_0100 2000 Nordson Corporation Less-obvious Dangers W ARNING: An operator or service technician working with the equipment should be aware of the less-obvious dangers that often cannot be completely …
Safety
1-4
SIG05_EN_A_0100
2000 Nordson Corporation
Operation
The system should only be operated when it is in working order. It should
only by operated by qualified persons following all regulations valid for liquid
adhesive systems.
Never allow the system to be operated by personnel under the influence
of substances which reduce their reaction times, or who are not able to
operate the equipment for physical reasons.
Prior to each startup of the system, check protection and warning
devices and make sure they are fully functional. Do not operate the
equipment if these devices are not functioning properly.
When the removal of safety equipment is required for installation,
maintenance or repair, it must be reconnected immediately upon
completion of the work.
In a humid environment, only equipment featuring a corresponding
protection may be operated.
Do not operate the system in an explosive environment.
Keep parts of the body and clothing away from rotating parts. Do not
wear loose articles of clothing when operating or servicing equipment
with rotating parts. Remove wrist watches, rings, necklaces or similar
jewelry and pin up or cover long hair before performing any work on or
with the equipment. The wearing of protective gloves may prove
hazardous in certain circumstances where rotating parts are present and
may therefore be forbidden.
To carry out measurements on the substrate or system components,
switch off parent machine and/or system and wait until the equipment
comes to a standstill.
Never point guns or applicator nozzles at yourself or other persons.
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
1-6
SIG05_EN_A_0100
2000 Nordson Corporation
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.