INSTALLATION OPERATION MAINTENANCE - Coastal Winair

FoundationInstallationDuctworkHorizontal UnitsIf the unit is installed at ground level, elevate it above thesnow line. Provide concrete footings at each support locationwith a “full perimeter” support structure or a slab foundationfor support. Refer to Table 1 for the unit’s operatingand point loading weights when constructing a footing foundation.If anchoring is required, anchor the unit to the slab usinghold down bolts or isolators. Isolators should be installed tominimize the transmission of vibrations into the building.For rooftop applications, ensure the roof is strong enough tosupport the combined unit and support structural weight.Refer to Table 1 for the unit operating weights. If anchoringis required, anchor the unit to the roof with hold-down boltsor isolators.Figure 4-1 illustrates the supply and return air openings asviewed from the rear of the unit.Elbows with turning vanes or splitters are recommended tominimize air noise due to turbulence and to reduce staticpressure.When attaching the ductwork to the unit, provide a watertight flexible connector at the unit to prevent operatingsounds from transmitting through the ductwork.All outdoor ductwork between the unit and the structureshould be weather proofed after installation is completed.Check with a roofing contractor for proper waterproofingprocedures.Figure 4-13 through 5 TonHorizontal Unit Supply & Return Air OpeningFigure 4-13 through 5 TonDownflow Unit Supply & Return Air Openings6 1/4 through 10 TonHorizontal Unit Supply & Return Air Opening6 1/4 through 10 TonDownflow Unit Supply & Return Air Openings15