8.0 DUAL DRIVE COMPRESSORS
The -039, -048, & -060 condensing units contain two compressors to deliver maxi-
mum efficiency and comfort. The Dual Drive Compressors are sized to increase run
times at first stage operation (partial capacity). When additional capacity is needed,
a two stage thermostat energizes both compressors to deliver full rated capacity.
8.1 Compressor Identification
The individual compressors are identified as Compressor A and Compressor B.
When facing the access panel, Compressor A is on the left and Compressor B is on
the right. (See Figure 3.)
8.2
Comfort Control
2
System™
Control Identification
The Dual Drive condensing units use one (1) serial communicating control per com-
pressor. There is a label in the control box that identifies each control/compressor
combination. When facing the access panel, Compressor A is controlled by the left-
hand board and Compressor B is controlled by the right-hand board.
16
FIGURE 4
FIGURE 3
DUAL DRIVE COMPRESSORS
COMPRESSOR A
COMPRESSOR B
