Emerson Vilter MicroVission, Operation And Service Manual

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Appendix A • Unloaders
A – 2
MicroVission Controller • Operation and Service Manual • Emerson • 2017VM-16 1.0
Table A-1. Type 1 Unloader - Cylinders: 2, 4, or 6
Unloading Percentage: 50% *
Unloader Tables
The following tables provide the status of Unloader Outputs for each type of unloading scheme at every step.
% Load Compressor Start Output Unloader Output #1 % Unload
0 (OFF) 0 0 100
50 1 1 50
100 1 0 0
Table A-2. Type 2 Unloader - Cylinders: 4
Unloading Percentage: 25%, 50%, 75% | Single cylinder on Unloader Output #1 *
% Load Compressor Start Output Unloader Output #1
(single cylinder)
Unloader Output #2
(double cylinder)
% Unload
0 (OFF)
0 0 0 100
25 1 1 1 75
50 1 0 1 50
75
1 1 0 25
100 1 0 0 0
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) 0 0 0 100
33 1 1 1 66
66
1 0 1 33
100 1 0 0 0
* 0 = output OFF
1 = output ON
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) 0 0 0 100
50 1 1 1 50
75
1 0 1 25
100 1 0 0 0