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2 TYP.
30
50-1/2
Figure 15: ZF078-150 Roof Curb
Figure 16: ZF078-150 Transition Roof Curb
Ductwork
Ductwork should be designed and sized according to the
methods in Manual D of the Air Conditioning Contractors of
America (ACCA) or as recommended by any other recognized
authority such as ASHRAE or SMACNA.
A closed return duct system should be used. This will not
preclude use of economizers or outdoor fresh air intake. The
Johnson Controls Ducted Systems
80-5/8
20
20
6
RETURN
30-1/2
50-1/2
RETURN
76-5/8
94
FRONT
RIGHT
SUPPLY
INSULATED DECK UNDER
COMPRESSOR SECTION
FRONT
8 or 14
2 TYP
23 4
26
SUPPLY
64-1/4
supply and return air duct connections at the unit should be
made with flexible joints to minimize noise.
The supply and return air duct systems should be designed for
the CFM and static pressure requirements of the job. They
should NOT be sized to match the dimensions of the duct
connections on the unit.
Refer to Figure 10 for bottom air duct openings. Refer to
Figures 12, 13 and Table 6 for side air duct openings.
5464597-YIM-B-0518
INSULATED DECK UNDER
CONDENSER SECTION
80-5/8
10
59-1/4
RIGHT
15
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