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Фрагмент инструкции
Allow 30-in. clearance to service end of unit and 48 in. above unit. For proper airflow, a 6-in. clearance on 1 side of unit and 12 in. on all remaining sides must be maintained. Maintain a distance of 24 in. between units. Position so water, snow, or ice from roof or eaves cannot fall directly on unit. C B A 3.8.D. (9.53) TIEDOWN KNOCKOUTS (2) PLACES A94199 Dimensions (In.) UNIT MINIMUM MOUNTING-PAD TIEDOWN KNOCKOUT LOCATIONS SIZE DIMENSIONS A B C 018-024 22-1/2 X 22-1/2 3-11/16 18-1/8 14-3/8 030-060 30 X 30 6-1/2 23-1/2 20 Fig. 3—Mounting Unit to Pad On rooftop applications, locate unit at least 6 in. above roof surface. Step 4—Operating Ambient The minimum outdoor operating ambient in cooling mode is 55°F, and the maximum outdoor operating ambient in cooling mode is 125°F. The maximum outdoor operating ambient in heating mode is 66°F. Step 5—Elevate Unit Accumulation of water and ice in base pan may cause equipment damage. In areas where prolonged freezing temperatures are encountered, elevate unit per local climate and code requirements to provide clearance above estimated snowfall level and ensure adequate drainage of unit. Step 6—Remove Indoor AccuRater® Piston and Install TXV For proper unit operation and reliability, units must be installed with field supplied hard shutoff TXV. Do not install with evaporator coils having capillary tube metering devices or pistons. For TXV kit part number and charging instructions, refer to TXV label in outdoor unit. If indoor unit (fan coil) comes factory equipped with a bi-flow hard shutoff TXV, no TXV change is required. 2 If TXV installation is required, remove existing AccuRater® from indoor coil. Refer to Figs. 4 and 5 and install TXV kit as follows: 1. Install suction tube adapter. 2. Install liquid flare-to-sweat adapter. 3. Connect external equalizer tube to fitting on suction tube adapter. 4. Position sensing bulb on horizontal portion of suction tube adapter. Secure using supplied hardware. 5. Insulate bulb after installation. (See Fig. 5.) 6. Leak check all connections. THERMOSTATIC EXPANSION VALVE COIL SENSING BULB EQUALIZER TUBE A88382 feeder tubes, there is a 3/8-in. O.D. stub tube approximately 2 in. long. (See Fig. 6.) The defrost thermostat should be located on stub tube. Note that there is only 1 stub tube used with liquid header, and on most units it is the bottom circuit. A97517 FEEDER TUBE DEFROST THERMOSTAT STUB TUBE Fig. 6—Defrost Thermostat Location Step 9—Make Piping Connections Relieve pressure and recover all refrigerant before system repair or final unit disposal to avoid personal injury or death. Use all service ports and open all flow control devices, including solenoid valves. Fig. 4—Typical TXV Installation A81032 2 O'CLOCK 10 O'CLOCK SENSING BULB STRAP SUCTION TUBE 8 O'CLOCK 4 O'CLOCK 7.8 IN. OD & SMALLER LARGER THAN 7.8 IN. OD If ANY refrigerant tubing is buried, provide a 6 in. vertical rise at service valve. Refrigerant tubing lengths up to 36 in. may be buried without further special consideration. For lengths longer than 36 in., refer to Application Guideline and Service Manual — Residential Split System Air Conditioners and Heat Pumps. To prevent damage to unit or service valves observe the following: •Use a brazing shield. •Wrap service valves with wet cloth or use a heat-sink material. Fig. 5—Positioning of Sensing Bulb Step 7—Check Outdoor AccuRater® Piston Check outdoor unit piston. Remove retainer on liquid service valve and check piston size with matching number listed on outdoor unit rating plate. Step 8—Check Defrost Thermostat Check defrost thermostat to ensure it is properly located and securely attached. There is a liquid header with a brass distributor and feeder tube going into outdoor coil. At the end of 1 of the Outdoor units may be connected to indoor section using accessory- tubing package or field-supplied refrigerant grade tubing of correct size and condition. For tubing requirements beyond 50 ft, substantial capacity and performance losses can occur. Following the recommendations in the Residential Split System Long-Line Application Guideline will reduce these losses. Refer to Table 1 for field tubing equivalent line length. Refer to Table 2 for accessory requirements. For buried line applications greater than 36 in., refer to Table 2 and Residential Split System Buried Line Application Guideline. Buried line applications may not exceed 100 ft. If refrigerant tubes or indoor coil are exposed to atmosphere, they must be evacuated to 500 microns to eliminate contamination and moisture in the system. 3 Table 1—Refrigerant Connections And Recommended Liquid-And Vapor-Tube Diameters (In.) UNIT LIQUID VAPOR VAPOR (LONG LINE) SIZE Connection Diameter Tube Diameter Connection Diameter Tube Diameter Connection Diameter Tube Diameter 018 3/8 3/8 5/8 5/8 5/8 3/4 024 3/8 3/8 3/4 3/4 3/4 3/4 030, 036 3/8 3/8 3/4 3/4 3/4 7/8 042 3/8 3/8 7/8 7/8 7/8 1-1/8 048, 060 3/8 3/8 7/8 1-1/8 7/8 1-1/8 NOTES: 1. Tube diameters are fo...
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