Assessments - 2, GPA: 4
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{ Additional requirement for Low---Ambient Controller (full modulation feature) MotorMasterr Control. Outdoor Unit Connected To Factory Approved Indoor Unit Outdoor unit contains correct system refrigerant charge for operation with approved ARI rated indoor unit when connected by 15 ft (4.57 m) of field--supplied or factory--accessory tubing, and factory supplied filter drier. Check refrigerant charge for maximum efficiency. Refrigerant Tubing and Sweat Connections Connect vapor tube to fitting on outdoor unit vapor service valves (see Table 2). Connect liquid tubing to adapter tube on liquid service valve. Use refrigerant grade tubing. ! CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation. Service valves must be wrapped in a heat--sinking material such as a wet cloth while brazing. Remove plastic retainer holding outdoor piston in liquid service valve, leaving the piston and piston retainer inside the valve. Connect sweat/flare adapter provided, to valve. (See Fig. 4.) Connect refrigerant tubing to fittings on outdoor unit vapor and liquid service valves. Service valves are closed from factory and ready for brazing. After wrapping service valve with a wet cloth, tubing set can be brazed to service valve using either silver bearing or non--silver bearing brazing material. Do not use soft solder (materials which melt below 800°F/427°C). Consult local code requirements. Refrigerant tubing and indoor coil are now ready for leak testing. This check should include all field and factory joints. A05226 Fig. 4 -- Liquid Service Valve Table 2 – Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (In.) UNIT SIZE LIQUID RATED VAPOR up to 80 ft. (24.38 m)* Connection Diameter Tube Diameter Connection Diameter Tube Diameter 018, 024 3/8 3/8 5/8 5/8 030, 036 3/8 3/8 3/4 3/4 042, 048 3/8 3/8 7/8 7/8 060 3/8 3/8 7/8 1--1/8 Notes: 1. Tube diameters are for total equivalent lengths up to 80 ft. (24.38 m) 2. Do not apply capillary tube or fixed orifice indoor coils to these units. * For Tubing Set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 20 ft. (6.10 m) vertical differential (250 ft./ 76.2 m)Total Equivalent Length), refer to the Longline Guideline--- Air Conditioners and Heat Pumps using Puronr Refrigerant. Install Liquid Line Filter Drier Indoor Refer to Fig. 5 and install filter drier as follows: 1. Braze 5 in. (127 mm) liquid tube to the indoor coil. 2. Wrap filter drier with damp cloth. 3. Braze filter drier to 5 in. (127 mm) long liquid tube from step 1. 4. Connect and braze liquid refrigerant tube to the filter drier. A05227 Fig. 5 -- Liquid Line Filter Drier Evacuate Refrigerant Tubing and Indoor Coil ! CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation. Never use the system compressor as a vacuum pump. Refrigerant tubes and indoor coil should be evacuated using the recommended deep vacuum method of 500 microns. The alternate triple evacuation method may be used (see triple evacuation procedure in service manual). Always break a vacuum with dry nitrogen. 223A / 224A M I CRO NS 223A/ 224A Deep Vacuum Method The deep vacuum method requires a vacuum pump capable of pulling a vacuum of 500 microns and a vacuum gage capable of accurately measuring this vacuum depth. The deep vacuum method is the most positive way of assuring a system is free of air and liquid water. A tight dry system will hold a vacuum of 1000 microns after approximately 7 minutes. See Fig. 6. 5000 4500 4000 3500 3000 2500 2000 1500 1000 500 LEAK IN SYSTEM VACUUM TIGHT TOO WET TIGHT DRY SYSTEM 01234 567 MINUTES A95424 Fig. 6 - --Deep Vacuum Graph Final Tubing Check IMPORTANT: Check to be certain factory tubing on both indoor and outdoor unit has not shifted during shipment. Ensure tubes are not rubbing against each other or any sheet metal. Pay close attention to feeder tubes, makings sure wire ties on feeder tubes are secure and tight. Be sure field wiring complies with local and national fire, safety, and electrical codes, and voltage to system is within limits shown on unit rating plate. Contact local power company for correction of improper voltage. See unit rating plate for recommended circuit protection device. NOTE: Operation of unit on improper line voltage constitutes abuse and could affect unit reliability. See unit rating plate. Do not install unit in system where voltage may fluctuate above or below permissible limits. CAUTION! UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation. Installation of filter drier in liquid line is required. Make Electrical Connections ! WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Do not supply power to unit with compressor terminal box cover removed. NOTE: Use copper wire only between disconnect switch and unit. NOTE: Install branch circuit disc...
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