Carrier 50TCQD14 Installation Instructions Manual

Also see for 50TCQD: Installation instructions

Contents

11A-B0.5″ (13)B-C1.0″ (25)A-C1.0″ (25)MAXIMUM ALLOWABLEDIFFERENCE IN. (MM)a50--- 9658Fig. 7 -- Unit Leveling TolerancesInstall insulation, cant strips, roofing felt, and counterflashing as shown. Ductwork must be attached to curb andnot to the unit.If electric and control wiring is to be routed through thebasepan, attach the accessory thru--the--base serviceconnections to the basepan in accordance with theaccessory installation instructions.Slab Mount (Horizontal Units Only) —Provide a level concrete slab that extends a minimum of6 inch (150 mm) beyond unit cabinet. Install a gravelapron in front of condenser coil air inlet to prevent grassand foliage from obstructing airflow.NOTE: Horizontal units may be installed on a roof curbif required.Alternate Unit Support (In Lieu of Curb or SlabMount) —A non--combustible sleeper rail can be used in the unit curbsupport area. If sleeper rails cannot be used, support the longsides of the unit with a minimum of 3 equally spaced 4--inchx 4--inch (102 mm x 102 mm) pads on each side.Step 5 — Field Fabricate DuctworkCabinet return-air static pressure (a negative condition)shall not exceed 0.35 in. wg (87 Pa) with economizer or0.45 in. wg (112 Pa) without economizer.For vertical ducted applications, secure all ducts to roof curband building structure. Do not connect ductwork to unit.Insulate and weatherproof all external ductwork, joints,and roof openings with counter flashing and mastic inaccordance with applicable codes.Ducts passing through unconditioned spaces must beinsulated and covered with a vapor barrier.If a plenum return is used on a vertical unit, the returnshould be ducted through the roof deck to comply withapplicable fire codes.For Units with Accessory Electric Heaters —All installations require a minimum clearance tocombustible surfaces of 1--in (25 mm) from duct for first12--in (305 mm) away from unit.PROPERTY DAMAGE HAZARDFailure to follow this caution may result in damageto roofing materials.Membrane roofs can be cut by sharp sheet metaledges. Be careful when placing any sheet metal partson such roof.CAUTION!Step 6 — Rig and Place UnitWhen the unit is ready to be rigged and no longer will belifted by a fork truck, the wood protector under the basepanmust be removed. Remove 4 screws from each base rail.Wood protector will drop to the ground. See instructions onthe unit base rails.Keep unit upright and do not drop. Spreader bars arerequired. Rollers may be used to move unit across a roof.Level by using unit frame as a reference. See Table 4 andFig. 9 for additional information.Lifting holes are provided in base rails as shown in Fig. 9.Refer to rigging instructions on unit.Rigging materials under unit (cardboard or wood) must beremoved PRIOR to placing the unit on the roof curb.UNIT DAMAGE HAZARDFailure to follow this caution may result inequipment damage.All panels must be in place when rigging. Unit is notdesigned for handling by fork truck.CAUTION!Before setting the unit onto the curb, recheck gasketing oncurb.Positioning on Curb —For full perimeter curbs CRRFCURB072A00 and 073A00,the clearance between the roof curb and the front and rearbase rails should be 1/4 in (6.4 mm). The clearance betweenthe curb and the end base rails should be 1/2 in (13 mm). Forretrofit applications with curbs CRRFCURB003A01 and4A01, the unit should be position as shown in Fig. 8.Maintain the 15 1/2 in (394 mm) and 8 5/8 in (220 mm)clearances and allow the 22 5/16 in (567 mm) dimension tofloat if necessary.C10003Fig. 8 -- Retrofit Installation Dimensions