Assessments - 2, GPA: 3
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Facilidade de uso
Use the duct flanges provided on the supply-and return-air openings on the side of the unit. See Fig. 2-4 for connection sizes and locations. The 14-in. round duct collars (size 024-048 units) are shipped inside the unit attached to the indoor blower. They are field-installed and must be removed from the indoor cavity prior to start-up, even if they are not used for installation. A. INSTALL FLANGES FOR DUCTWORK CONNECTIONS (060 Only) The 564A060 units are shipped with flanges which must be field-installed on the unit. To install unit flanges: 1. Five pieces of flange are shipped on the return-air opening of the unit. Remove the flanges from the shipping position. See Fig. 5. Screws are field-supplied. 2. One piece of flange is used as it is shipped (straight). Bend the other 4 pieces at right angles. 3. Install the straight flange on the right side of the return-air opening in holes provided. See Fig. 6. Flanges should stick out from unit to allow for connection of ductwork. 4. Install 2 hand-formed flanges onto return air opening in holes provided to form a rectangle around the return air opening. 5. Install remaining 2 hand-formed flanges around discharge air opening in holes provided. 6. Ductwork can now be attached to flanges. When designing and installing ductwork, consider the following: CAUTION: When connecting ductwork to units, do not drill deeper than 3/4 inch in shaded area shown in Fig. 7 or coil may be damaged. • All units should have field-supplied filters installed in the return-air side of the unit. Recommended sizes for filters are shown in Table 1. • Avoid abrupt duct size increases and reductions. Abrupt change in duct size adversely affects air performance. Use flexible connectors between ductwork and unit to prevent transmission of vibration. Use suitable gaskets to ensure weathertight and airtight seal. • Size ductwork for cooling air quantity (cfm). The minimum air quantity for proper electric heater operation is listed in Table 2. Heater limit switches may trip at air quantities below those recommended. • Insulate and weatherproof all external ductwork. Insulate and cover with a vapor barrier all ductwork passing through conditioned spaces. Follow latest Sheet Metal and Air Conditioning Contractors National Association (SMACNA) and Air Conditioning Contractors Association (ACCA) minimum installation standards for residential heating and air conditioning systems. • Secure all ducts to building structure. Flash, weatherproof, and vibration-isolate duct openings in wall or roof according to good construction practices. Fig. 8 shows a typical duct system with 564A unit installed. —5— B. CONVERTING HORIZONTAL DISCHARGE UNITS TO DOWNFLOW (Vertical) DISCHARGE WARNING: Before performing service or maintenance operations on system, turn off main power to unit. Turn off accessory heater power switch if applicable. Electrical shock can cause serious injury or death. FIVE PIECES OF DUCT FLANGE ATTACHED HERE FOR SHIPMENT C00005 Fig. 5—Shipping Location of Duct Flanges (Size 060 Only) C00006 HAND FORM HAND FORM STRAIGHT PIECE Fig. 6—Flanges Installed on 564A060 Units 19.17. 3.92. C00007 Units are dedicated side supply products. They are not convertible to vertical air supply. A field-supplied plenum must be used to convert to vertical air discharge. VI. PROVIDE FOR CONDENSATE DISPOSAL NOTE: Be sure that condensate-water disposal methods comply with local codes, restrictions, and practices. Unit removes condensate through a 1-3/64-in. ID hole which is located at the end of the unit. See Fig. 2-4 for location of condensate connection. Condensate water can be drained directly onto the roof in rooftop installations (where permitted) or onto a gravel apron in ground- level installations. Install a field-supplied condensate trap at end of condensate connection to ensure proper drainage. Make sure that the outlet of the trap is at least 1 in. lower than the drain-pan condensate connection to prevent the pan from overflowing. See Fig. 9A and 9B. Prime the trap with water. When using a gravel apron, make sure it slopes away from the unit. If the installation requires draining the condensate water away from the unit, install a 2-in. trap using a 3/4-in. OD tube or pipe. See Fig. 9A and 9B. Make sure that the outlet of the trap is at least 1 in. lower than the unit drain-pan condensate connection to prevent the pan from overflowing. Prime the trap with water. Connect a drain tube using a minimum of 3/4-in. PVC, 3/4-in. CPVC, or 3/4-in. copper pipe (all field supplied). Do not undersize the tube. Pitch the drain tube downward at a slope of at least 1 in. for every 10 ft of horizontal run. Be sure to check the drain tube for leaks. Prime trap at the beginning of the cooling season start-up. Allowable glues for condensate trap connection are: Standard ABS, CPVC, or PVC cement. VII. INSTALL ELECTRICAL CONNECTIONS WARNING: The unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the pos...