AC Flashcards
To little heat or air flow will raise what
Pressures
What’s superheat
It’s the temperature above the refrigerant saturation temperature
What is evaporator temperature
The difference between space temperature and coil temperature
Saturated refrigerant is what
Vapour and liquid
How can saturated temp be converted
Convert pressures to temp chart
Superheat is a example of
Sensible heat
What is boiling point also referred as
Saturation or coil temp
What’s dose the term de-super heat mean
Vapour cools
Condense and de-super heat are in interchangeable terms
False
Describe the liquid in sub cooling state
Liquid only
What should not be used when cleaning microchannel condensers
Acid coil cleaners
Most ice machines do not have filters
False
On water cooled , when water regulator increases
The water flow increases
Basic concept of water cooled condenser is
Fridgerants on the outside coil and water is in the middle coil
What system has the greatest coil TD
AC
High side of compression include components?
Above condensation pressures
Explain low side of compression
Below vapour pressure
Superheat is defined as
Sensible heat above saturation
Hermetic compressor are usually used in what system
Low capacity
Types of water cooled condenser
Double tube
Shell and coil
Shell and tube
Double tube coil is set up how
Inner tube is water , outer tube is refrigerant
Water cooled evaporator absorbs how many btu
970 btus
When compressor stops the pressure in the evaporator
Increases
Pipes for air conditioning are sized by
Outside diameter with soft temper
