Maintenance; Monthly Maintenance; Annual Maintenance - Gardner Denver RNC Series Instruction Manual

3.0 MAINTENANCE

3.1 Monthly Maintenance

A. Air-Cooled: Clean refrigerant condenser. Blow the fins of the
condenser clean with compressed air, if necessary, remove
heavier soiling with a suitable cleansing agent.
B. Water-cooled - clean strainer monthly, more often if required.
Shut off water, remove small plug to relieve pressure, then
remove large plug to remove strainer. Clean strainer and
replace.
C. Check the condensate drains by pressing the Drain Test
button on the control panel (see page 5 for description and
location). Visually check to assess whether condensate is
separated and discharged.
D. Check the dew point temperature on the control panel.
E. Check the inlet compressed air temperature and the ambient
temperature (or inlet cooling water temperature) to assure
they are within the operational limits.
Ref: 3.2, C, 2, e through h
1
14

3.2 Annual Maintenance

A. Check all terminals in the switchgear cabinet and tighten
them up if necessary.
B. Maintenance/Cleaning of the condensate drain.
1. To facilitate service, maintenance kits are available.
C. Replace the filter cartridges in the filter. (All necessary service
parts can be ordered in a service kit – See Parts List.)
1. When to replace the Separator/Filters.
Replace filter element when pressure drop across dryer
is excessive or annually.
When removing liquids at rated flow conditions, the
pressure drop will be 5 psi (0.35 bar), or less, across
the entire dryer. An increase in pressure drop will occur
only as the separator/filter elements become loaded with
solid particles. It is recommended, for maximum filtration
efficiency, the separator/filter elements be replaced when
the pressure drop across the dryer exceeds 10 psi (0.7
bar), or every 12 months, whichever occurs first.
2. Replacement of the Separator/Filters
Failure to do this may result in injury.
a. Open the bypass between compressed air inlet and
outlet. (if equipped)
b. Close the shut-off devices at the compressed air inlet
and outlet.
c. Press the Drain Test button on the control panel (see
page 5 for description and location) until the system
is depressurized.
d. Switch off the dryer.
e. Remove the insulation [1].
2
Check to be sure the unit is de-energized.
Depressurize the unit before servicing.
3
4