Class 2 (2nd Engineer) MEP 📅 Sep 2018

Exam Question

With the aid of a simple sketch, explain the 'trouble spots' in a basic air conditioning unit and with reference to your sketch, explain the following:

(a) How the problem of increasing humidity of cooled air is overcome?

(b) How discomfort caused by the excessive drying effect of heated air is overcome

Reference Answer

Trouble Spots in a Basic Air Conditioning Unit
Refrigerant Leakage: Commonly occurs at the compressor shaft seal, condenser, dryer, oil separator, evaporator coils, or damaged pipes.
Condenser: Insufficient water or air flow and dirty tubes may cause high-pressure (HP) trip.
Filters: Blocked intake and recirculation filters lead to poor airflow.

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