Carrier AquaSnap 30RB Series Installation, Operation And Maintenance Instructions page 52

Duct installation examples
Case 1
For units 30RB 162 with two V-shaped air condensers.
1 Fan motor access hatches (provide a 700 x 700 mm hatch) for each single and dual duct
solution 1
One separate duct per fan
Circuit a
EV11
Circuit B
EV21-EV22
Each fan discharge to the outside has its own duct.
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Solution 1 Solution 2
solution 2
Circuit a
One separate duct for the EV11 fan
Circuit B
One separate duct for the EV21 + EV22 fan pair