Carrier 73Y - Manual (Page 13)

SERVICE POINTS
(Check Annually)
1
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3.
5.
Clean evaporator and condenser coils.
Indoors — Use a hooked wire or bristle brush to re­
move dirt from fins.
Outdoors — Use compressed air or a vacuum cleaner.
Clean basepan and other painted surfaces.
Clean all drain passages.
Clean motor and fans.
Vacuum clean the insulation.
Paint parts that show evidence of rust with a good rust-
resistant paint.
7. Check refrigerant connections for evidence of leakage.
Repair if necessary.
8. Check wires for deterioration.
9. Check damper controls.
10. Fans should be tight on motor shaft.
11. Run the unit and eliminate any piping vibration.
12 Check thermostat capillaries for proximity to refriger­
ant tubing (should not be touching). Check to be sure
protective sleeve is in place.
13