Carrier Infinity 25VNA4 Installation Instructions Manual

Also see for Infinity 25VNA4: Service manual Owner's manual

25VNA4: Installation InstructionsManufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.6Outdoor Unit Connected to Factory-Approved IndoorUnitOutdoor unit contains correct system refrigerant charge for operationwith factory-approved, AHRI-rated smallest indoor unit whenconnected by 15 ft. (4.57 m) of field-supplied or factory-accessorytubing, and factory-supplied filter drier. Check refrigerant charge formaximum efficiency.NOTE: If the indoor furnace coil width is more than the furnace casingwidth, refer to the indoor coil Installation Instructions for transitionrequirements.Install Liquid-Line Filter Drier IndoorRefer to Fig. 6 and install filter drier as follows on 24, 36 and 48 sizemodels:1. Braze 5-in. (127 mm) liquid tube to the indoor coil.2. Wrap filter drier with damp cloth.3. Braze filter drier to above 5-in. (127 mm) liquid tube.4. Connect and braze liquid refrigerant tube to the filter drier.Refer to Fig. 7 and install filter drier as follows on 60 size models:1. After wrapping the liquid service valve with a wet cloth braze 5-in.(127 mm) liquid tube to the liquid service valve on outdoor unit.2. Wrap filter drier with damp cloth.3. Braze filter drier to above 5-in. (127 mm) liquid tube.4. Connect and braze liquid refrigerant tube to the filter drier.A05227Fig. 6 – Liquid-Line Filter Drier for 2, 3 & 4 Ton ApplicationsA200059Fig. 7 – Liquid-Line Filter Drier for 5 Ton ApplicationsRefrigerant Tubing connection OutdoorConnect vapor tube to fitting on outdoor unit vapor service valves (seeTable 1).No Installation of Adapter TubeAlthough it is a heat pump this unit has a standard AC liquid servicevalve. An EXV inside the unit serves as the heating expansion device.Sweat ConnectionsUse refrigerant grade tubing. Service valves are closed from factory andready for brazing. After wrapping service valve with a wet cloth, brazesweat connections using industry accepted methods and materials.Consult local code requirements. Refrigerant tubing and indoor coil arenow ready for leak testing. This check should include all field andfactory joints.Evacuate Refrigerant Tubing and Indoor CoilRefrigerant tubes and indoor coil should be evacuated using therecommended deep vacuum method of 500 microns. The alternate tripleevacuation method may be used. See Service Manual for tripleevacuation method. Always break a vacuum with dry nitrogen prior toopening the refrigerant system for servicing.Deep Vacuum MethodThe deep vacuum method requires a vacuum pump capable of pulling avacuum of 500 microns and a vacuum gauge capable of accuratelymeasuring this vacuum depth. The deep vacuum method is the mostpositive way of assuring a system is free of air and liquid water. (SeeFig. 8)A95424Fig. 8 – Deep Vacuum GraphCAUTION!UNIT DAMAGE HAZARDFailure to follow this caution may result in unit damage or improperoperation.Installation of filter drier in liquid line is required.EXTERIORWALLLIQUID LINEFILTER DRIERTO DWELLINGCAUTION!UNIT DAMAGE HAZARDFailure to follow this caution may result in equipment damage orimproper operation.• Use a brazing shield• Wrap service valves with wet cloth or heat sink material.CAUTION!UNIT DAMAGE HAZARDFailure to follow this caution may result in equipment damage orimproper operation.Never use the system compressor as a vacuum pump.500MINUTES0 1 2 3 4 5 6 710001500LEAK INSYSTEMVACUUM TIGHTTOO WETTIGHTDRY SYSTEM2000MICRONS250030003500400045005000