Slush Flashcards
1
Q
Low ambient is what temp?
A
60F and below
2
Q
Typical Condenser split
A
30F
Lower for: freezers, remote, high efficiency
3
Q
For 3/8” tubing, what is the pressure drop per foot of rise?
A
1/2 psig per foot rise
4
Q
Fan cycle controls differential:
A
30-50F, 40F is standard
5
Q
HPR problem: head pressure is low and liquid line is cold
A
HPR valve port stuck open
6
Q
HPR problem: head pressure high, liquid line warm or hot
A
HPR valve port stuck closed, only passing on hot gas not liquid refrigerant
7
Q
HPR problem: liquid line warm or hot, head pressure low
A
Not an HPR problem, undercharge. Common in first cold snap
8
Q
Wastewater cooled systems water usage
A
1.5 g/min per ton @75F water temp
9
Q
1 ton
A
1200 Btuh
