York D*SC360 Installation Instructions Manual

Contents

York D*SC360 Installation Instructions Manual Manual pdf 12 page image

Refer to the following accessory instructions for additionalcontrol wiring information.• 690.50-N1 - Firestat• 530.11-N10.1 - Status Panel• 530.25-N1.7 - Low Ambient Kit• 530.25-N1.8 - Pumpdown Kit• 530.11-N10.4 - Night Setback KitDUCT CONNECTIONSThe supply and return air duct can be connected to the supportangles which are part of the roof curb package. This allows theinstallation of the duct work and roof curb before installing theunit. All duct connections are contained within the roof curb.Refer to Fig. 14 for duct connection dimensions for the bottomside-by-side arrangement.Refer to Form 55.70-N1 for suggested means of installing andinsulating ducts.When a unit is used with a ceiling plenum return air system,sound may be transmitted from the unit thru the ceiling to theconditioned space. For such applications, there must be asound absorption chamber installed on the unit return air inletas shown in Figure 15. In this way, sound generated by the unitis absorbed in the chamber and not transmitted to the condi-tioned space. The chamber may be constructed of fiberglassduct or metal duct lined with sound absorption material. Ceilingreturn grilles should be located a minimum of 12 feet from theend of the sound chamber. In every installation a return air ductmust be installed to the unit.FILTERSAll filters being used in these units are 2" thick. Throwawayfilters or 55% efficient bag type filters are available as factoryoptions. Cleanable filters or 30% efficient throwaway filters areavailable as accessories. The cleanable filters have an alumi-num mesh media that may be cleaned in hot water or steam,reoiled and reused indefinitely. The 30% and 55% efficientfilters are available to meet specifications for improved airfiltration. Refer to Table 4 for filter sizes and quantities.FIG. 14 - DUCT CONNECTIONSUnitModel2" Throwaway2" Cleanable2" 30%55% BagDSC360 (6) 2 X 20 X 25(9) 2 X 20 X 20(4) 12 X 20 X 24(4) 12 X 24 X 24DSC480 (6) 2 X 20 X 25(12) 2 X 20 X 20(5) 12 X 20 X 24(5) 12 X 24 X 24TABLE 4 - FILTER REQUIREMENTSFIG. 15 - SOUND ABSORPTION CHAMBER530.25-N3Y12 Unitary Products Group