York SUNLINE MagnaDRY DR180 Installation Manual

Also see for SUNLINE MagnaDRY DR 180: Submittal data sheet Installation manual

Contents

York SUNLINE MagnaDRY DR180 Installation Manual Manual pdf 19 page image

127915-YIM-A-0405Unitary Products Group 19DUCTWORKDuctwork should be designed and sized according tothe methods in Manual Q of the Air Conditioning Con-tractors of America (ACCA).A closed return duct system shall be used. This shallnot preclude use of economizers or outdoor fresh airintake. The supply and return air duct connections atthe unit should be made with flexible joints to minimizenoise.The supply and return air duct systems should bedesigned for the CFM and static requirements of thejob. They should NOT be sized to match the dimen-sions of the duct connections on the unit.Refer to Dimensions and Clearances Figure 12 forinformation concerning side and bottom supply andreturn air duct openings.NOTE: It is recommended that, in Canada, the outletduct be provided with a removable accesspanel. It is recommended that this opening beaccessible when the unit is installed in service,and of a size such that smoke or reflected lightmay be observed inside the casing to indicatethe presence of leaks in the heat exchanger.The cover should be attached in a manneradequate to prevent leakage.FIXED OUTDOOR AIR INTAKE DAMPERThis damper is shipped inside the return air compart-ment. It is completely assembled and ready for installa-tion. A damper baffle inside of the hood is adjustable toprovide variable amounts of outdoor air intake on unitsthat are not provided with an economizer or a motor-ized damper option. Refer to the Fixed OutdoorDamper Figure 3.Gasketing and mounting screws are provided in a partsbag attached to the hood assembly. Apply gasketing tothe three flange surfaces on the hood prior to installingthe hood. Extend gasketing 1/4 inch beyond the topand bottom of the two side flanges to insure adequatesealing.Adjusting the damper to the desired air flow may bedone before mounting the hood into position or afterinstallation by removing the front hood panel or thescreen on the bottom of the hood. Damper baffle inposition 1 will allow approximately 10% outdoor airflow, position 2 approximately 15% and, to allowapproximately 25%, remove the damper baffle.On units with bottom return air application install thedamper assembly over the opening in the side returnair access panel. Remove and discard the openingcover and the covering over the hood mounting holes(used for shipping) before installing. Secure with thescrews provided.On units with side return air applications, install thedamper assembly on the return air ductwork as closeto the unit as possible. Cut an opening 16 inches highby 18 inches wide in the ductwork to accommodate thedamper. Using the holes in the hood flanges as a tem-plate, drill 9/64 inch dia. (#26 drill) holes into the duct-work and secure with the screws provided.When fastening ductwork to side duct flangeson unit, insert screws through duct flangesonly. DO NOT insert screws through casing.Outdoor ductwork must be insulated andwaterproofed.If outdoor air intake will not be required onunits with bottom return air applications, thedamper assembly should still be mounted onthe side return air access panel, per theinstructions above, to insure moisture is notdrawn into the unit during operation. The cov-ering over the mounting holes only need beremoved. Do not remove the opening cover.