NTI GF 200 Installation Manual

Also see for GF 200: Quick installation guide

NTI GF 200 Installation Manual Manual pdf 25 page image

243.9 Ducting the appliance3.9.1 Supply ductingThe appliance provides a standard-size flangedsupply air outlet for easy installation of a coolingcoil or supply plenum. Take care not to damage theheating coil when installing ductwork to the supplyair outlet by using screws no longer than ¾” (0.75in.).3.9.2 Return ductingThe return air may be delivered to the appliancevia: a) either side; b) the back; c) the bottom; or anycombination thereof, provided that access to one ofthe two side doors remains clear (24” min.) for fanaccess and maintenance.Should spatial restrictions preclude such a clearancein a side-return installation, it is recommended thata joint be made in the return ducting such that theportion immediately adjacent to the cabinet beremovable to allow for fan access.a) Side return:When routing return air into the side of the unit, anopening may be cut into the central area of the sidedoor, taking care not to excise the screw holes.If installing a cabinet-mounted filter rack, it may befastened to both the remaining door material andthe cabinet, such that it overlaps the door frame.However, DO NOT drill holes or cut away anymaterial from the cabinet sides themselves.b) Rear return:When routing return air into the back of the unit, anopening may be cut within the confines of theprovided holes, taking care not to damage theinterior sheet metal when using longer tools.c) Bottom return:When routing return air into the bottom of the unit,an opening may be cut into the floor, leaving aminimum of 1” clearance from the sides and the rearfeet, and 2” from the spine, taking care not todamage the piping and blower when using longertools.3.9.3 Air filtration systemIn all installations, an appropriate air filtrationsystem is recommended and must meet testrequirements in UL 900. Failure to install one couldlead to damage to and/or premature failure of thespace heating components.MAX CUTTINGBOUNDARYSidesRearBottomMAX CUTTINGBOUNDARYMAX CUTTINGBOUNDARY