HVAC Excellence Refrigeration and
Charging
Belt pushed machines offer the flexibility of selecting a compressor velocity to healthy the load.
True or False? - ANS-True
Common use for open compressors? - ANS-Automobile aircon
High condenser temp. The tougher a compressor has to paintings to move the refrigerant vapor
out of the evaporator into the compressor. Requires more horsepower.
True or False? - ANS-True
High evaporator temp. Increase the BTUH capability, requiring less horsepower for each BTU of
cooling.
True or False? - ANS-True
How are compressors identified? - ANS-Mechanical elements that perform the real pumping of
the refrigerant vapor.
How does a compressor reduce the quantity of fuel? - ANS-Squeezing it
Low condenser temp. Reduce horsepower required for each BTU of cooling, the greater its
warmth elimination capability.
True or False? - ANS-True
Low evaporator temp. Require extra horsepower for each BTU of cooling.
True or False? - ANS-True
Nonpositive Displacement Compressors also are referred to as? - ANS-Centrifugal compressors
Theres continually a closed position on a 3 position service valve.
True or False - ANS-False, there isn't always a closed role on these valves due to the fact one
of the go out ports will always be open.
Three function provider valves have 3 ports and two seats.
True and False - ANS-True
Types of evaporators - ANS-1. Bare pipe evaporators
2. Plate evaporators
3. Tube and fin coil evaporators
Charging
Belt pushed machines offer the flexibility of selecting a compressor velocity to healthy the load.
True or False? - ANS-True
Common use for open compressors? - ANS-Automobile aircon
High condenser temp. The tougher a compressor has to paintings to move the refrigerant vapor
out of the evaporator into the compressor. Requires more horsepower.
True or False? - ANS-True
High evaporator temp. Increase the BTUH capability, requiring less horsepower for each BTU of
cooling.
True or False? - ANS-True
How are compressors identified? - ANS-Mechanical elements that perform the real pumping of
the refrigerant vapor.
How does a compressor reduce the quantity of fuel? - ANS-Squeezing it
Low condenser temp. Reduce horsepower required for each BTU of cooling, the greater its
warmth elimination capability.
True or False? - ANS-True
Low evaporator temp. Require extra horsepower for each BTU of cooling.
True or False? - ANS-True
Nonpositive Displacement Compressors also are referred to as? - ANS-Centrifugal compressors
Theres continually a closed position on a 3 position service valve.
True or False - ANS-False, there isn't always a closed role on these valves due to the fact one
of the go out ports will always be open.
Three function provider valves have 3 ports and two seats.
True and False - ANS-True
Types of evaporators - ANS-1. Bare pipe evaporators
2. Plate evaporators
3. Tube and fin coil evaporators
