York DNH018 Installation Manual

Also see for CHAMPION PLUS DNH018: Technical guide

York DNH018 Installation Manual Manual pdf 6 page image

66324-YIM-B-10046 Unitary Products GroupROOF CURBOn applications when a roof curb is used, the unit must bepositioned on the curb so the front of the unit is tight againstthe curb.FILTERSSingle phase units are shipped without a filter or filter racksand is the responsibility of the installer to secure a filter in thereturn air ductwork or install a Filter/Frame Kit (1FF0110).A filter rack and a high velocity filters are standard on threephase units.Filters must always be used and must be kept clean. Whenfilters become dirt laden, insufficient air will be delivered bythe blower, decreasing your units efficiency and increasingoperating costs and wear-and-tear on the unit and controls.Filters should be checked monthly especially since this unit isused for both heating and cooling.CONDENSATE DRAINA condensate trap is recommended to be installed in the con-densate drain. The plumbing must conform to local codes.Use a sealing compound on male pipe threads. Install thecondensate drain line (NPTF) to spill into an open drain.SERVICE ACCESSAccess to all serviceable components is provided by the fol-lowing removable panels:• Blower compartment• Gas control/electrical service accessRefer to Figure 5 for location of these access panels and min-imum clearances.THERMOSTATThe room thermostat should be located on an inside wallapproximately 56" above the floor where it will not be subjectto drafts, sun exposure or heat from electrical fixtures orappliances. Follow manufacturer's instructions enclosed withthe thermostat for general installation procedure. Four colorcoded insulated wires (minimum #18 AWG) should be usedto connect thermostat to unit. See Figure 2.POWER AND CONTROL WIRINGField wiring to the unit must conform to provisions of the cur-rent N.E.C. ANSI/NFPA No. 70 or C.E.C. and/or local ordi-nances. The unit must be electrically grounded in accordancewith local codes or, in their absence, with the N.E.C./C.E.C.Voltage tolerances which must be maintained at the com-pressor terminals during starting and running conditions areindicated on the unit Rating Plate and Table 8.The wiring entering the cabinet must be provided withmechanical strain relief.A fused disconnect switch should be field provided for theunit. If any of the wire supplied with the unit must be replaced,replacement wire must be of the type shown on the wiringdiagram.Electrical line must be sized properly to carry the load. Eachunit must be wired with a separate branch circuit fed directlyfrom the meter panel and properly fused.Refer to Figure 2 for typical field wiring and to the appropriateunit wiring diagram for control circuit and power wiring infor-mation.