Carrier 30XA080-500 Controls, Start-Up, Operation, Service And Troubleshooting Instructions page 19

100 _ Lead compressor can fall anywhere in this area _Lead Compressor Loading
[when load between 40%~65% fAN --Lag Compressor Loading
j//,/ _ --Lead Compressor Unloading
_Lag Compressor Unloading
8O
.___
¢ >, LOADING_ '_ LOx_ING _
c)
_- 40
o
c)
20
Lag compressor can fail anywhere in this area
I
when cad between 40%~65% I
I
0
0
100
Load (%)
Equal Circuit Loading
Unit Loading Unloading (Staged circuit loading)
100
8O
o_ 60
8
y_
_ 40
2O
1CO
Lead (%)
Staged Circuit Loading
Fig. 8 -- Compressor Loading and Unloading
19