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7. Secure the unit to the rails.
8. Insulate any ductwork outside of the structure with
at least two (2) inches of insulation and then
weatherproof. There must be a weatherproof seal
where the duct enters the structure.
9. No exposure to direct roof water runoff.
10. Flexible duct connectors must be of a flame
retardant material. All duct work outside of the
Table 2. Typical Rooftop Horizontal Airflow Application with Frame
Return Air
Roof Flashing
Channel Iron Center
Support (Center Support
required on all frame
applications).
88-4YCA4001-1A-EN
Supply Air
S S t t e e p p 4 4 — — U U n n i i t t I I n n s s t t a a l l l l a a t t i i o o n n
structure must be insulated and weatherproofed in
accordance with local codes.
11. Access and service clearances for the unit must be
given careful consideration when locating the duct
entrance openings. Figures
Unit Clearances," p. 5
12. Continue with the following installation sections:
Ductwork, Filter and Electrical Wiring.
"Step 2 — Determine
provide unit dimensions.
Angle Iron Frame
11
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