ICP PAF354000K00A1 Installation Instructions Manual

Contents

reinforced.Check the weight of the unit in relation to the roofstructure and local building codes or ordinances andreinforce roof structure if necessary.- Support for the unit MUST be level and strong enoughto carry unit weight. The support may consist of aplatform or a combination of platform and roof beams orcurb.HOISTINGNOTE: All access panels MUST be secured in place beforehoisting.The unit should be hoisted with two lifting slings. Attach theslings to rigging shackles that have been hooked throughholes in the base rail.Two spreader bars MUST be placed on top of the unit toprotect the unit from damage from the pressure exerted bythe slings. Make sure that all equipment is adequate tohandle the weight ofthe unit and that the slings will not allowthe unit to shift.Refer to Figure 8 for illustrated rigging instructions andweight chart.DOWNFLOW CONVERSIONNOTE: In downflow applications with roof curbs or jackstands, the center rail under the unit must be removed. Thecenter rail is attached to the base rail with screws.These units are adaptable to downflow use. To convert todownflow use, follow these steps:1. Remove the blockoff plates found in the return aircompartment and the supply air compartment.NOTE: Blockoff plate in the supply air compartment onlycontains one screw. If reinstalling plate, back part of plateMUST fit into mating dimples on flange. To reinstall, slantplate into dimples, then put plate into position and fastenwith screw.2. Install the removed plates on the horizontal return andsupply air openings.3. Install roof curb on the building. Be sure to follow alldirections included with curb and all applicable buildingcodes in your installation.Condensate DrainThe condensate drain outlet is a 3/4" (19.1 mm) female PVCconnection located at the bottom on the left hand side (seeFIGURE 2).The circulating blower creates a negative pressure on thecondensate drain line that can prevent the condensate fromdraining properly. To combat this negative pressure, a fieldsupplied condensate trap that will allow a standing columnof water of at least 2" (50.8mm) MUST be installed. Top ofoutlet from trap MUST be at least 1" (25.4mm) below top ofoutlet from unit. Install the trap as near to the unit aspossible for proper drainage,A 3/4" (19.1 mm) drain line MUST be installed if required bylocal codes or if location of unit requires it. Run the drain lineto an open drain or other suitable disposal point.FIGURE 2 1 Condensate Drain Information*(25.4mm)(2" (50.Smm)3/4" (19.1mm)Female PVCFitting _3/4" (19,1mm)Drain Line* Condensate trap MUST be installed.80-31-32141