EVAPORATOR COIL AND AND CONDENSING COIL.

TM 5-4120-369-14

4-21.

MIST ELIMINATOR - Continued.

(2) Although the mist eliminator should not require any service normally, it may

become clogged and dirty. The cleaning procedure is as follows:

WARNING

Cleaning solvent, Federal Specification P-D-680, Type 11,

used for cleaning electrical parts, is flammable and gives

off poisonous vapors. Use only in a well ventilated area.

Avoid prolonged breathing of vapors. Keep solvent and

vapors away from open flame. Do not use in excessive

amounts.

(a) Clean filter with cleaning solvent (Federal Specification P-D-680) if lubricating oil

is used as the dust collecting adhesive. Clean filter `with water if a water soluble filter coaster

( Appendix D) is used as the duct collecting adhesive. Flush the filter with solvent or water in

opposite direction of air flow. Be careful not to damage filter during cleaning. Replace filter if

the frame is bent or the filtering material is damaged.

(b) Shake excess solvent or water from filter and allow to dry thoroughly. If available,

low pressure campressed air (15 psig) can be used to speed drying. When using compressed sir

for drying filter, always direct the air stream in the opposite direction of the filter air flow. Hold

the air nozzle a safe distance away from the filter to prevent compressing or separating the filter-

ing material.

spraying. Make sure that the total air filtering surface is thoroughly covered with the adhesive

when spraying the filter. Allow excessive adhesive to drain before installing filter.

Installation.

(1) Install mist eliminator by sliding down into position.

(2) Replace top front cover (paragraph 4-18) .

EVAPORATOR COIL AND AND CONDENSING COIL.

The coils (heat exchangers ) should be serviced as often as necessary to insure maximum

operating capacity of unit Dirt and lint loaded coils or bent coil fins not only restrict normal

volume of air flow, but also insulate the coils, thus reducing their efficiency as heat exchangers.

Frequent cleaning of the external coil surfaces may avoid internal clogging. Clean external

surfaces with a soft bristled brush or a plastic fin comb. The plastic fin comb can be used to

straighten bent coil fins. Clean internally-clogged coils with compressed air. Always direct the

compressed sir stream straight into coils, to avoid bending fins, and in the opposite direction of

normal air flow. Remove covers and louvers (paragraphs 4-18, 4-19, 4-20) to service coils.

4-17