Slush

Question 1

Low ambient is what temp?

Answer 1

60F and below

Question 2

Typical Condenser split

Answer 2

30F

Lower for: freezers, remote, high efficiency

Question 3

For 3/8” tubing, what is the pressure drop per foot of rise?

Answer 3

1/2 psig per foot rise

Question 4

Fan cycle controls differential:

Answer 4

30-50F, 40F is standard

Question 5

HPR problem: head pressure is low and liquid line is cold

Answer 5

HPR valve port stuck open

Question 6

HPR problem: head pressure high, liquid line warm or hot

Answer 6

HPR valve port stuck closed, only passing on hot gas not liquid refrigerant

Question 7

HPR problem: liquid line warm or hot, head pressure low

Answer 7

Not an HPR problem, undercharge. Common in first cold snap

Question 8

Wastewater cooled systems water usage

Answer 8

1.5 g/min per ton @75F water temp

Question 9

1 ton

Answer 9

1200 Btuh