American Standard YHC033A, Установка, эксплуатация и обслуживание

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15
Installation
Figure 4-1
3 through 5 Ton
Horizontal Unit Supply & Return Air Opening
6 1/4 through 10 Ton
Horizontal Unit Supply & Return Air Opening
Supply
Return
Ductwork
Figure 4-1 illustrates the supply and return air openings as
viewed from the rear of the unit.
Elbows with turning vanes or splitters are recommended to
minimize air noise due to turbulence and to reduce static
pressure.
When attaching the ductwork to the unit, provide a water
tight flexible connector at the unit to prevent operating
sounds from transmitting through the ductwork.
All outdoor ductwork between the unit and the structure
should be weather proofed after installation is completed.
Figure 4-1
3 through 5 Ton
Downflow Unit Supply & Return Air Openings
6 1/4 through 10 Ton
Downflow Unit Supply & Return Air Openings
Roof Curb
Downflow
The roof curbs for these units consists of a “full perimeter”
enclosure to support the unit.
Before installing any roof curb, verify;
1. That it is the correct curb for the unit,
2. That it includes the necessary gaskets and hardware,
3. That the purposed installation location provides the re-
quired clearance for proper operation.
4. Insure that the curb is level and square. The top surface of
the curb must be true to assure an adequate curb-to-unit
seal.