Installation, Maintenance & Repair Procedures Flashcards

Why is vacuuming the system important before charging refrigerant?

Answer: Eliminates moisture and air

Vacuuming the refrigeration system before charging with refrigerant is a critical step to eliminate non-condensable gases, primarily moisture and air. Moisture can freeze and cause blockages, leading to system failure, while air increases discharge pressure and reduces efficiency. A deep vacuum ensures a clean, dry system, allowing the refrigerant to operate optimally.

What is the purpose of leak testing during installation?

Answer: To detect refrigerant leaks

To identify and fix any refrigerant leaks for safe operation.

Which tool is commonly used for brazing refrigerant lines?

Answer: Oxy-acetylene torch

An oxy-acetylene torch is used to weld or braze copper tubing.

What routine maintenance is required for air filters?

Answer: Replace or clean periodically

They should be cleaned or replaced regularly to ensure airflow.

How should refrigerant be recovered during repairs?

Answer: Use recovery machine

Use certified recovery equipment to prevent environmental damage.

Why must electrical connections be checked during repairs?

Answer: To ensure safe operation

Loose or corroded connections can cause equipment failure.

How are condensate drains maintained?

Answer: Flush regularly

By cleaning and flushing to prevent blockages and overflow.

What causes a frozen evaporator coil?

Answer: Low airflow or refrigerant

Low airflow or low refrigerant levels are common causes.

Why is it important to follow manufacturer specifications?

Answer: To ensure performance and safety

To ensure proper function, warranty coverage, and safety.