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4.9 INLET AIR FILTER ELEMENT
The inlet air filter element should be changed at the
interval shown in the maintenance chart or any time
the filter becomes dirty.
The filter element is not washable and must be
replaced. Remove air filter housing top cover. Remove
air filter element. Install new element and replace top
cover.(See Figure 4.9-1).
FIGURE 4.9-1 INLET AIR FILTER
4.10 COOLANT FILTER
Time of change - after the first 150 hours and every
2000 hours thereafter, or when the coolant is being
changed. In dirty operating environments, the filter
should be changed more frequently.
Before beginning any work on the compressor,
open, lock and tag the main electrical disconnect
and close the isolation valve on the compressor
discharge.Wait 2 minutes after stopping to allow
internal pressure to dissipate.Vent residual pres-
sure from the unit by slowly unscrewing the
coolant fill plug one turn. Unscrewing the fill plug
opens a vent hole, drilled in the plug, allowing the
pressure to release to atmosphere (See Figure 4.3-
1). A slight mist or oil droplets may be visible dur-
ing venting. Do not remove fill plug until all pres-
sure has vented from the unit. Also vent piping by
slightly opening the drip leg valve.When opening
the drain valve or removing the coolant fill plug,
stand clear of the valve discharge, wear work
gloves and appropriate eye protection.
Special Tools
Suitable clean drain pan or container to hold coolant
drained from unit.
A quantity of proper coolant sufficient to top off the
coolant level in the compressor.
One genuine IR replacement coolant filter of the prop-
er type for the unit.
Procedure
1. Place a clean pan under the coolant filter.
2. Using a filter wrench, remove the coolant filter.
Remember that the filter and coolant may be hot!
3. Discard the old filter.
4.Wipe the sealing surface of the filter housing with a
clean lint-free rag to prevent entry of dirt into the sys-
tem.
5. Remove the replacement filter from it’s protective
package.
6. Apply a small amount of clean coolant on the rubber
seal of the filter.
7. Screw filter on until the seal makes contact with the
head of the filter housing.Tighten approximately one
half to three quarters turn additional.
8. Remove coolant fill plug (See Figure 4.10-1).
FIGURE 4.10-1 SEPARATOR TANK
TOP COVER
COOLANT FILL PLUG
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