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8.2.5
Checking the pilot signal cable function
For units with pilot signal cable also ensure the following at initial start-up:
•
The unit only starts directly when one of the following occurs:
–
A valve is opened at a work site, causing the micro switch to close.
–
The test start button is pressed on the start and control unit (if available).
•
The unit shuts down when the time set on the timer relay has elapsed after the valve is
closed (up to 30 minutes).
9
Maintenance
Read Chapter '3 Safety' before carrying out maintenance.
It is recommended to install an hour service meter in the start and control unit.
NOTE!
The intervals in this chapter are based on the unit being professionally maintained.
Inspections in the unit are recommended to be made with only the enclosure roof removed.
WARNING!
Risk of hearing impairment.
Use hearing protection. The sound level is very high when the unit is run with the enclosure roof
removed.
WARNING!
Risk of electric shock.
Work with electric equipment must be carried out by a qualified electrician.
WARNING!
Risk of personal injuries.
Use proper protective equipment when risking exposure to the dust.
WARNING!
Risk of electric shock.
Always disconnect the supply voltage before any servicing, whether mechanical or electrical.
Always lock any maintenance switch in the off position.
WARNING!
Risk of personal injury.
Ensure that the vacuum meter, see Figure 3 item 15, shows that no vacuum is present in the
system during service.
WARNING!
Risk of burn injury.
Make sure the unit is cool before undertaking an inspection to avoid burn. The unit and its parts
can get very hot.
9.1
General inspection
Perform the following general inspection every 500 hours of operation:
•
Inspect the incoming connections. Ensure that all cables and hoses are tightly fitted.
•
Check for signs of corrosion or other damage.
•
Check that the ventilation inlet and outlet of the unit are clear.
•
Check that the ventilation to the room is clear (if placed indoors).
•
Check for dust or collected material inside the unit. Dust or collected material may indicate
a filter malfunction.
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