Refrigeration Cycle
This component absorbs heat from the refrigerated space
What is an evaporator
This piece of equipment protects your eyes from ammonia exposure.
What are safety goggles
A high head pressure reading may indicate this condenser issue
What is a dirty or blocked condenser
This tool is used to monitor system pressure
What is a pressure gauge
The chemical formula for ammonia is this
What is NH3
This device compresses refrigerant vapor, raising its pressure and temperature
What is a compressor
This must always be worn when handling refrigerants or chemicals
What are gloves
: If the evaporator is covered in ice, this component may be malfunctioning.
What is the defrost cycle
This device electrically energizes to control refrigerant flow
What is a solenoid valve
Ammonia is classified as this type of gas by the DOT
What is non-flammable
This component rejects heat to the outside
What is a condenser
This device is used to detect the presence of ammonia in the air
What is an ammonia detector
This device will shut down the engine room in the event of an emergency
What is the Emergency Stop Switch (e-stop)
This tool is used to check for leaks in an ammonia refrigeration system
What is a sulfur stick (or PH paper)
The IDLH (immediately Dangerous To Life and Health) concentration for ammonia is this many PPM
What is 300 PPM
This device meters refrigerant into the evaporator and causes a pressure drop
What is an expansion device
This is the first thing you should do if you smell ammonia in the plant
What is evacuate the area (or leave the area and move upwind)
High counts on this equipment would indicate flood back in a recirculator
What is a transfer vessel
This component stores refrigerant just before the expansion valve
What is a receiver (or High Pressure Receiver HPR)
Contact with liquid ammonia can cause this type of injury
What is frostbite (or chemical burns)
These four main components make up the basic refrigeration cycle
What is an evaporator, compressor, condenser and expansion device
This is the recommended minimum time to flush eyes with water after an ammonia exposure
What is 15 minutes
High oil cooling temperatures on screw compressors could be caused by low refrigerant in this vessel
What is a thermosyphon
This component rejects heat where it can do no harm
What is a condenser
This is the first step in First Aid if ammonia is inhaled
What is move the person to fresh air