Emerson VILTER MicroVission Operation And Service Manual page 198

Appendix A • Unloaders
Unloader Tables
The following tables provide the status of Unloader Outputs for each type of unloading scheme at every step.
Table A-1. Type 1 Unloader - Cylinders: 2, 4, or 6
Unloading Percentage: 50% *
% Load Compressor Start Output Unloader Output #1 % Unload
0 (OFF)
50
100
Table A-2. Type 2 Unloader - Cylinders: 4
Unloading Percentage: 25%, 50%, 75% | Single cylinder on Unloader Output #1 *
% Load Compressor Start Output
0 (OFF)
25
50
75
100
Table A-3. Type 3 Unloader - Cylinders: 6 or 12
Unloading Percentage: 33%, 66% *
% Load Compressor Start Output Unloader Output #1 Unloader Output #2 % Unload
0 (OFF)
33
66
100
Table A-4. Type 4 Unloader - Cylinders: 8 or 16
Unloading Percentage: 25%, 50% *
% Load Compressor Start Output Unloader Output #1 Unloader Output #2 % Unload
0 (OFF)
50
75
100
* 0 = output OFF
1 = output ON
A – 2
0
1
1
Unloader Output #1
(single cylinder)
0
1
1
1
1
0
1
1
1
0
1
1
1
MicroVission Controller • Operation and Service Manual • Emerson • 35391MV 1.3
0 100
1 50
0 0
Unloader Output #2
(double cylinder)
0 0
1 1
0 1
1 0
0 0
0
1
0
0
0 0
1 1
0 1
0 0
% Unload
100
75
50
25
0
0 100
1 66
1 33
0 0
100
50
25
0