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The flashcards below were created by user
salvatorefricano
on FreezingBlue Flashcards.
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Where do you get Ambient Air readings from.
High Side
2" from the condenser coil
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How can you get Liquid Line Temp.
High side
Condensing Temp - Subcooling
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How can you get High Side pressure.
High Side
Condensing temp converted.
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How do you get Condensing Temperature.( Design)
High Side
Ambient air + Condenser TD(Design)
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How Do you get Condensing Temperature(Actual)
High Side
High side pressure, converted (Actual)
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How can you get Condenser TD ( Temperature Difference).
- Condensing Temperature - Ambient
- (Condenser Temperatures are):
- Medium temp 30*
- Mid Efficiency 25*
- High Efficiency 20*
- Remote 10*
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How can you get Subcooling.
High Side
Liquid Line Temp - Condensing temp
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How can you get Suction Line Temp.
Low Side
Superheat - Boiling Temp
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How can you get Low Side Pressure.
Low Side
Boiling Temp converted to a pressure.
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How can you get Superheat.
Low Side
Boiling Temp - Suction line Temp
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where is supply air
back of evaporator coil = boiling temp. (coil temp)
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where do we get Return Air
Temp in front of the fan = box temp
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How do we get Delta T
Supply air - Return Air.
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What would happen to the
subcooling/superheat if you open or
turn the txv clockwise.
your Superheat/subcooling would go up.⇧
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What would happen to your subcooling/superheat if you close or turn the txv counterclockwise.
Your Superheat/Subcooling wil go down⇩
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What is considered to be low ambient temperature.
60*F and below.
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How would you get the C/O Setting for a Low Pressure Switch
- 5# for Low pressure refrigerant
- 10# for high pressure refrigerant
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How would you get a C/I setting for a Low Pressure Switch
Low side PSIG plus 10# (buffer)
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What is the formula to getting a fan cycling switch setting
Low Ambient(60)+ condensing TD= X *F convert to pressure= X #PSIG= C/O + 40#= X = C/I
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Definition: Delta-T
- Difference in temperature across a divider;
- often used to refer to the difference between
- indoor and outdoor temperatures.
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Definition: superheat
Sensible heat in a gas above the amount needed to maintain the gas phase.
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When fan is off in a from a fan cycling switch you can only measure what
Superheat
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Evaporator temp is the same as what
Boiling temperature
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how do you get evaporator temp
convert low side pressure to a temperature
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How do you get boiling temp(Design)
Return air - evap TD(Design)
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how do you get boiling temp (Actual)
convert low side pressure to a temp(Actual)
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How do you get Design evaporator TD
Box temp - Evaporator TD
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Inside box temperature is the same as what
Supply air temperature
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