Johnson Controls R SERIES Installation And Maintenance Manual page 16

2.1.7 Installation of air duct
Dimensions of the Supply Air Outlet/Return Air Inlet
21mm(7/8inch)
Item
Model
DHR18NDB21S 123(4-7/8)
DHR24NDB21S 158(6-1/4)
DHR30NDB21S 158(6-1/4)
158(6-1/4)
DHR36NDB21S
158(6-1/4)
DHR42NDB21S
190(7-1/2)
DHR48NDB21S
T-joint converging condensate pipes
T-joint converging condensate pipes
Figure 3-1-17
Figure 3-1-18 Supply Air Outlet
Figure 3-1-19 Return Air Inlet
Table 3-1-3
Supply Air Outlet
A B
736(29)
818(32-1/4)
818(32-1/4)
818(32-1/4)
818(32-1/4)
850(33-1/2)
B
C
C
710(28)
994(39-1/8)
994(39-1/8)
1000(39-3/8)
1000(39-3/8)
940(37)
8
Unit: mm (inch)
Return Air Inlet
D
166(6-1/2)
195(7-5/8)
195(7-5/8)
206(8-1/8)
206(8-1/8)
286(11-1/4)