The flashcards below were created by user salvatorefricano on FreezingBlue Flashcards.

1. Where do you get Ambient Air readings from.

High Side

2" from the condenser coil
2. How can you get Liquid Line Temp.

High side
Condensing Temp - Subcooling
3. How can you get High Side pressure.

High Side
Condensing temp converted.
4. How do you get Condensing Temperature.( Design)

High Side
Ambient air + Condenser TD(Design)
5. How Do you get Condensing Temperature(Actual)

High Side

High side pressure, converted (Actual)
6. 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*
7. How can you get Subcooling.

High Side
Liquid Line Temp - Condensing temp
8. How can you get Suction Line Temp.

Low Side
Superheat - Boiling Temp
9. How can you get Low Side Pressure.

Low Side
Boiling Temp converted to a pressure.
10. How can you get Superheat.

Low Side
Boiling Temp - Suction line Temp
11. where is supply air
back of evaporator coil = boiling temp. (coil temp)
12. where do we get Return Air
Temp in front of the fan = box temp
13. How do we get Delta T
Supply air - Return Air.
14. What would happen to the
subcooling/superheat if you open or
turn the txv clockwise.
15. What would happen to your subcooling/superheat if you close or turn the txv counterclockwise.
16. What is considered to be low ambient temperature.
60*F and below.
17. How would you get the C/O Setting for a Low Pressure Switch
• 5# for Low pressure refrigerant
• 10# for high pressure refrigerant
18. How would you get a C/I setting for a Low Pressure Switch
Low side PSIG plus 10# (buffer)
19. 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
20. Definition: Delta-T
• Difference in temperature across a divider;
• often used to refer to the difference between
• indoor and outdoor temperatures.
21. Definition:  superheat
Sensible heat in a gas above the amount needed to maintain the gas phase.
22. When fan is off in a from a fan cycling switch you can only measure what
Superheat
23. Evaporator temp is the same as  what
Boiling temperature
24. how do you get evaporator temp
convert low side pressure to a temperature
25. How do you get boiling temp(Design)
Return air - evap TD(Design)
26. how do you get boiling temp (Actual)
convert low side pressure to a temp(Actual)
27. How do you get Design evaporator TD
Box temp - Evaporator TD
28. Inside box temperature is the same as what
Supply air temperature
 Author: salvatorefricano ID: 295890 Card Set: System Readings (refrigeration) Updated: 2015-02-24 23:53:24 Tags: superheat subcooling suction line temp Folders: Description: how to read gauges and convert to temperatures, subcooling, superheat, txvs,low pressure switch settings, fan cycling switch settings Show Answers: