Hi, i stuck in a problem,PACU-1, PACU means Package air condition unit, but what number Indicates,like PACU-1,PACU-2... in HVAC system,same problem for RV-1 RV-2. Can you explain.?

The number simply is a designator to indicate which particular unit is be discussed or noted.

Niel Leon
Engineering.com

Dear sir, but in my document for PACU, there is nothing written regarding capacities,thats why i confused about these numbers.

It could be that all the PACU's have the same capabilities, there are just multiple units. All the units will need the same service connections.

Niel

The number designation could also be a model reference from the manufacturer. So you might only have 1 unit, and that unit could be PACU-4.

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