Carrier manual outside air damper install#
Step 3 Ð Install External Trap for Condensateĭrain Ð The unit's 3¤ 4-in. These units are designed for a minimum continuous returnair temperature of 50 F (dry bulb), or an intermittent operation down to 45 F (dry bulb), such as when used with a night set-back thermostat. wg with Durablade or PARABLADE economizer or. Cabinet return-air static shall not exceed −.35 in. If a plenum return is used on a vertical unit, the return should be ducted through the roof deck to comply with applicable ®re codes.Ī minimum clearance is not required around ductwork. Insulate and weatherproof all external ductwork, joints, and roof openings with counter ¯ashing and mastic in accordance with applicable codes.ĭucts passing through an unconditioned space must be insulated and covered with a vapor barrier. For horizontal applications, ®eld-supplied ¯anges should be attached to horizontal discharge openings and all ductwork secured to the ¯anges. Step 2 Ð Field Fabricate Ductwork Ð Secure all ducts to roof curb and building structure on vertical units.ĭo not connect ductwork to unit. NOTE: Horizontal units may be installed on a roof curb if required. Install a gravel apron in front of condenser coil air inlet to prevent grass and foliage from obstructing air¯ow. SLAB MOUNT (Horizontal Units Only) Ð Provide a level concrete slab that extends a minimum of 6 in. Refer to Accessory Roof Curb Installation Instructions for additional information as required. This is necessary for unit drain to function properly. Unit leveling tolerances are shown in Fig. Improperly applied gasket can also result in air leaks and poor unit performance.Ĭurb should be level. Install gasket supplied with the roof curb as shown in Fig. IMPORTANT: The gasketing of the unit to the roof curb is critical for a watertight seal. Connection plate must be installed before unit is set in roof curb. If gas is to be routed through the curb, attach the accessory thru-the-curb service connection plate to the roof curb in accordance with the accessory installation instructions. Install insulation, cant strips, roo®ng felt, and counter ¯ashing as shown. ROOF CURB Ð Assemble and install accessory roof curb in accordance with instructions shipped with curb. Seals around duct openings must be tight. Using the same screws, install covers on vertical duct openings with the insulationside down. To convert to horizontal con®guration, remove screws from side duct opening covers and remove covers. Unit is shipped in the vertical discharge con®guration. Electrical shock could cause personal injury. When pressure testing ®eldsupplied gas piping at pressures of 1¤ 2 psig or less, a unit connected to such piping must be isolated by manually closing the gas valve(s).īefore performing service or maintenance operations on unit, turn off main power switch to unit. If gas valve is subjected to pressure greater than 1¤ 2 psig, it must be replaced before use. Pressures greater than 1¤ 2 psig will cause gas valve damage resulting in hazardous condition. Have ®re extinguishers available for all brazing operations.ĭisconnect gas piping from unit when leak testing at pressure greater than 1¤ 2 psig. Use quenching cloth for unbrazing operations. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply.įollow all safety codes. All other operations should be performed by trained service personnel. Untrained personnel can perform basic maintenance functions of cleaning coils and ®lters and replacing ®lters. Only trained and quali®ed service personnel should install, repair, or service air-conditioning equipment. Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Step 8 Ð Adjust Factory-Installed Options.
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