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OPERATING AND MAINTENANCE MANUAL
Chapter 9
- Operation and Maintenance
NRC0020-0200 UL
The data in this manual are not binding and may be changed by the manufacturer without notice.
Reproduction of this manual, even partial, is strictly prohibited.
9 . 3
P l a n n i n g o f c h e c k s a n d m a i n t e n a n c e o p e r a t i o n s
CAUTION
The above maintenance schedule is based on average operating conditions.
In some cases it may be necessary to increase maintenance frequency.
TASK
1 da
y
1 mont
h
6 months
1 year
Check to ensure there are no alarm signals.
•
Press the manual condensate drain button to check that the valve drains properly.
•
If the dryer is equipped with a timed condensate drain, check for possible excessive production of condensate; in this
case increase the valve opening time (ON). Check that the solenoid valve opens properly, in compliance with the times
set on control unit.
•
Check that compressed air inlet temperature is lower than the limit for which the dryer was selected (normally 35-40°C
95-104°F).
•
When the compressor is running, check that its upper part is not too hot (more than approximately 50°C / 122°F). Check
that the dryer's current draw is within the rated values.
•
Remove, clean and refit the condensate drain filter.
If the filter is always clogged with material, it may be necessary to dismantle and clean the solenoid valve.
•
Make a visual inspection of the refrigerant circuit to make sure the piping has not deteriorated and there are no traces of
oil, which may indicate a leak of refrigerant.
•
Check the condition and soundness of piping connections.
•
Check the condition and soundness of the electrical connections.
•
Check that ambient air temperature is lower than the limit value used to select the dryer (normally 25-30°C / 77-86°F).
Check that the area in which the dryer is installed is well-ventilated.
•
Check that the fan switches on automatically and does not produce excessively high noise levels.
Clean the condenser fins with a jet of clean compressed air.
Make sure the grilles are free from dirt and any other obstructions.
•
Clean the condenser fins with mild detergent.
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Summary of Contents for NRC0020-0200 UL
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