If obstacles are around the outdoor unit, they must be 800mmbelow the top of the outdoor unit. Otherwise, a mechanical
exhaust device must be added.
2.1.3 Master and slave unit positioning
In systems with multiple outdoor units, the units should be placed in order from largest capacity unit to smallest capacity
unit. The largest capacity unit must be placed on the first branch, and be set as the master unit, while the others should be
set as slave units. Refer to the V6R Service Manual, Part 4 for details of how to set units as master/slave.
The example in Figure 3-2.5 illustrates the placing of units in a 46HP combination:
Place the 18HP unit on the first branch and set it as the master unit.
Place the 16HP and 12HP units on the next branches and set them as slave units.