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MSC4000 - MSC15000 USER GUIDE
7.2
Routine Maintenance
This section covers the various components that require periodic maintenance and/or
replacement.
Coalescing Filter Element
The coalescing filter element should be check Biannually. On units with the standard
control panel, check the pressure drop across the unit by using air pressure gauges
upstream and downstream of the dryer using the closest possible gauges to the dryer.
If it is determined that there is a high pressure drop across the machine, remove the filter element
from the machine and inspect it. If the filter is dirty, replace it. Ensure that air
pressure is removed from the machine prior to removing the filter element. On units that have the
Control Center option installed the filter differential can be checked on the
control board.
The coalescing element should be changed annually. To change the filter element:
• De-pressurize the dryer.
• Remove the bolts that secure the filter housing cover.
• Remove the wing nut that secures the filter cap to the element.
• Remove the filter cap.
• Remove the existing element from the housing.
• Install the replacement element.
• Reinstall the filter cap and wing nut
• Reinstall the filter cover.
Condensing Coil (Air Cooled Units)
The condensing coil should be cleaned weekly. Ensure that air pressure is removed from the
system prior to cleaning the condenser. The condenser can be cleaned by using a vacuum
or compressed air. If the condenser is not clean after it is blown out with compressed air or
vacuumed, contact the factory for assistance.
Condenser (Water Cooled Units)
The water cooled condenser should be checked and cleaned annually if necessary. To check the
condenser, water flow to the condenser should be shut off, air flow to the machine should be shut
off, and the unit should be taken out of a run mode. The end bonnets then need to be removed
exposing the tube side of the condenser. The tube side should be inspected for any debris and
cleaned. If soft deposits are found they can be cleaned using a pneumatic tube cleaning gun
which forces plugs down the tubes. Some have a brush between two rubber plugs and others
are specially designed plugs which scrape the tube walls as they travel down the tube. If scale is
found special equipment is required to clean the tubes. These cleaning systems utilize a flexible
shaft which rotates a brush as it is fed down the tube, they can also simultaneously flush out the
tubes with water. There is a wide variety of brushes and tools available that attach to the shaft to
clean both soft and hard deposits.
Drain Line Y-Strainer (See Section 5.0, Fig. 4)
The drain line y-strainer should be cleaned weekly. Air flow and air pressure should be removed
from system before proceeding. To clean the y-strainer:
•
Turn the ball valve on the strainer assembly to the closed position
•
Remove threaded cap at the end of the ball valve assembly.
•
Clean the screen inside of the cap by rinsing it under water.
•
Reinstall the screen and cap
•
Return the ball valve to the open position
High Pressure, Low Pressure, & Fan Control (AC units only)