YORK INTERNATIONAL
122
Unit Controls
TABLE 17 – DISCHARGE AIR TEMPERATURE CONTROL FOR 6 COMPRESSORS (8 STEPS)
LEAD SYSTEM
LAG SYSTEM
*STEP
COMP 1
COMP 2
COMP 3
COMP 1
COMP 2
COMP 3
0
OFF
OFF
OFF
OFF
OFF
OFF
1
ON+HG
OFF
OFF
SEE NOTE 1
OFF
OFF
OFF
2
ON
OFF
OFF
OFF
OFF
OFF
3
ON
OFF
OFF
SEE NOTE 2
ON
OFF
OFF
4
ON
ON
OFF
SEE NOTE 3
OFF
OFF
OFF
5
ON
ON
OFF
ON
OFF
OFF
6
ON
ON
OFF
ON
ON
OFF
7
ON
ON
ON
ON
ON
OFF
8
ON
ON
ON
ON
ON
ON
TABLE 18 – DISCHARGE AIR TEMPERATURE CONTROL FOR 4 COMPRESSORS (6 STEPS)
LEAD SYSTEM
LAG SYSTEM
*STEP
COMP 1
COMP 2
COMP 1
COMP 2
0
OFF
OFF
OFF
OFF
1
ON+HG
OFF
SEE NOTE 1
OFF
OFF
2
ON
OFF
OFF
OFF
3
ON
OFF
SEE NOTE 2
ON
OFF
4
ON
ON
SEE NOTE 3
OFF
OFF
5
ON
ON
ON
OFF
6
ON
ON
ON
ON
* STEP can be viewed using the OPER DATA key and scrolling to COOLING DEMAND.
Summary of Contents for MILLENNIUM YCUL0016SC
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