Nordson Asymtek Spectrum S-920, Installation, Operation & Maintenance Manual

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2-14 Safety
2.11 Service Shutdown
Before performing any service or parts replacement, the dispensing system should be shut down
as follows:
1. Shutdown the dispensing system as described in 6.12 System Shutdown .
2. Perform a “Lockout/Tagout of Electrical and Pneumatic Energy” as described below.
2.11.1 Lockout/Tagout of Electrical and Pneumatic Energy
Companies may differ in their Lockout/Tagout (LOTO) procedures and requirements, and it is the
responsibility of the end user to determine compliance with local safety procedures. The purpose of any
LOTO effort is to help avoid injury or dispensing system damage due to unexpected energizing of
equipment, start up, or the release of stored energy during repair, maintenance, and operation of
equipment. Situations where LOTO practices may be employed on the S-920 include:
•
Adjusting cables, belts, pulleys, or moving parts
•
Servicing bearings or motors
•
Troubleshooting, servicing, or replacing electronic components or assemblies
•
Troubleshooting, servicing, or replacing pneumatic components or assemblies
Situations where LOTO practices might not be required are when troubleshooting electrical, pneumatic,
or hydraulic components or assemblies that make de-energizing the whole system impractical.
Troubleshooting or servicing the S-920 while powered up and operating should only be accomplished by
fully trained and qualified personnel. There should always be a second person present when performing
maintenance on a system under power.
To lockout/tagout the electrical and pneumatic energy:
1. Turn the main circuit breaker on the rear of the system to the
OFF (0)
position.
2. Unplug the main power cable from the back of the Power Manager.
3. Rotate the main air pressure knob counterclockwise until the gauge reads 0 psi and then
disconnect the main air supply by the quick release fitting.
4. Install an approved, keyed lock on the locking flange of the main circuit breaker so it cannot
be turned on; tag it with an approved tag.
!
Ensure that the owner, date, reason, and estimated time for repair are clearly marked on
the tag.
5. Install an approved lockout clamp and keyed lock onto the power connector so it cannot be
reconnected to the power manager, and attach an approved tag.
!
Ensure the owner, date, reason, and estimated time to repair are clearly marked on the
tag.
6. Install an approved lockout clamp and keyed lock onto the pneumatic fitting so it cannot be
reconnected to the main air regulator, and attach an approved tag. Ensure the owner, date,
reason, and estimated time to repair are clearly marked on the tag.