Vertiv Liebert iCOM DP400/500 Installer/User Manual page 34

Figure 3.4 Compressor Control—Dual Digital Scroll Compressor
Tandem Compressor Sets
A tandem compressor set consists of one digital scroll compressor and one fixed capacity, standard scroll compressor on a
circuit. Typically, tandem compressors are employed in dual circuit Liebert® DSE units with circuit 1 on the outer coil and
circuit 2 on the inner coil as shown in the example in Figure 3.5 below.
Figure 3.5 Dual Circuit, Tandem Digital Scroll Compressors in a Liebert DSE
In iCOM, tandem compressors us the following naming convention:
26
No. Description
1 Lead compressor.
2 Lag compressor.
3 Lead and lag compressors.
4 ½ of proportional band.
5 Deadband
No. Description
1
Vertiv™ | Liebert® iCOM™ Installer/User Guide