Carrier 040-420 User Manual
Page 25

Table 4D
Capacity Control Steps, 225, 250, 280
UNIT
3 0 G T
250 (50 Hz)
280 (60 Hz)
Al**
CONTROL
S T E P S
SEQUENCE A
Compressors
Al
Al
Al
Al
Al
A l ”
Al
Al
l
,A2,Bl
Al
Al
Al
Al
Al
Al
l
,A2,A3,A4,Bi
Al
A l *
*
Al
Al ,Bl
Al
Al
Al
Al
Al
Al
Al
l
,A2,A3,Bl
Al
Al
Al
Al
Al
Al
*Unloaded compressor.
-/-Compressor unloader, standard.
““Compressor unloader, accessory
unloaders, both unloaded
NOTE: These capacity control steps may
due to lag compressor sequencing
LOADING SEQUENCE B
Compressors
Al
Al
Al
Al
Al
Al
Al
Al
l
,Bl*,B2
Al
Al
Al
l
,A2,Bl
Al
Al
Al
Al
Al
Al
Al
Al
Al
2 5
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