3.2.12 Refrigerant Only Refrigerant 22 (R-22) is to be used in the air conditioning units.
3.2.13 Air Filters The function of the air filter is to remove particles of dirt, lint, soot and pollen from the air.
of the filter will vary with the amount of foreign matter in the air. That is, the period of time allowed between
cleaning them. When the circulated air contains considerable lint or dust, it may be necessary to clean or
replace the filters several times each month. A dirty or clogged filter reduces the air flow, which impairs the
operating efficiency of the cooling system by restricting the air flow through the air conditioning unit. Access to
the filter is obtained on the unit by removing the front grill section. The recommended filter size is 18 x 36 x 1
and a quantity of one (1) each is used. See Drawing #024R102.