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Aire-Flo 4AC14LS24P Installation Instructions Manual

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Aire-Flo 4AC14LS24P Manual Online:

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Aire-Flo 4AC14LS24P User Manual
Aire-Flo 4AC14LS24P User Guide
Aire-Flo 4AC14LS24P Online Manual

Text of Aire-Flo 4AC14LS24P User Guide:

  • Aire-Flo 4AC14LS24P, ©2018 Lennox Industries Inc. Dallas, Texas, USA Page 1 THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a licensed professional HVAC installer or equivalent, or service agency. IMPORTANT The Clean Air Act of 1990 bans the intentional venting of refrigerant (CFCs, HCFCs and HFCs) as of July 1, 19

  • Aire-Flo 4AC14LS24P, Page 2 B FIGURE 1 TABLE 1 – Unit Dimensions Model Numbers A B 4AC14LS18P 28-1/4 (724) 29-1/4 (743) 4AC14LS24P 28-1/4 (724) 33-1/4 (845) 4AC14LS30P 28-1/4 (724) 37-1/4 (946) 4AC14LS36P 28-1/4 (724) 37-1/4 (946) 4AC14LS42P 28-1/4 (724) 33-1/4 (845) 4AC14L48P 28-1/4 (724) 37-1/4 (946) 4AC14L60P 32-1/4 (819) 33-1/4 (845) STEP 1 – SETTING THE UNIT (Continued) – Unit Placement NOTICE! Roof Damage! This system contains both refrigerant and oil. Some rubber roong material may absorb oil, causing the rubber to degrade. Failure to follow this notice could result in damage to roof surface. I

  • Aire-Flo 4AC14LS24P, Page 3 STEP 2 – REFRIGERANT PIPING – Flushing Existing Line Set and Indoor Coil IMPORTANT If this unit is being matched with an approved line set or indoor unit coil that was previously charged with mineral oil, or if it is being matched with a coil which was manufactured before January of 1999, the coil and line set must be ushed prior to installation. Take care to empty all existing traps. Polyol ester (POE) oils are used in units charged with HFC-410A refrigerant. Residual mineral oil can act as an insulator, preventing proper heat transfer. It can also clog the expansion device and reduce system performance and capaci

  • Page 4 TABLE 2. Refrigerant Line Set – Inches (mm) Model Number (-xx*) Valve Size Connections Recommended Line Sets Liquid Line Suction Line L15 Line Set Model Line Set Length Catalog Number 4AC14LS18P 4AC14LS24P 4AC14LS30P 3/8" (10mm) 3/4" (19mm) L15-41-20 20 feet (6.1 m) 89J56 L15-41-30 30 feet (9.1 m) 89J57 L15-41-40 40 feet (12.2 m) 89J58 L15-41-50 50 feet (15.2 m)

  • Aire-Flo 4AC14LS24P, Page 5 STEP 2 – REFRIGERANT PIPING – Removing Existing Indoor Metering Device SENSING LINE TEFLON ® RING FIXED ORIFICE BRASS NUT LIQUID LINE ASSEMBLY (INCLUDES STRAINER) LIQUID LINE ORIFICE HOUSING DISTRIBUTOR TUBES DISTRIBUTOR ASSEMBLY REMOVE AND DISCARD WHITE TEFLON ® SEAL (IF PRESENT) A - On fully cased coils, remove the coil access and plumbing panels. B - sembly. C - Using two wrenches, disconnect liquid line from liquid line ing. T cess. D - Remove and discard fixed orifice, valve stem assembly (if present) and Teflon ® washer as illustrated above

  • Page 6 STEP 2 – REFRIGERANT PIPING – Brazing Procedures ATTACH THE MANIFOLD GAUGE SET FOR BRAZING LIQUID AND VAPOR LINE SERVICE VALVES OUTDOOR UNIT LIQUID LINE VAPOR LINE LIQUID LINE SERVICE VALV E VAPOR LINE SERVICE VALV E ATTACH GAUGES INDOOR UNIT VAPOR SERVICE PORT MUST BE OPEN TO ALLOW EXIT POINT FOR NITROGEN A - Connect gauge set low pressure side to liquid line service valv

  • Aire-Flo 4AC14LS24P, Page 7 WHEN BRAZING LINE SET TO SERVICE VALVES, POINT FLAME AWAY FROM SERVICE VALVE. LIQUID LINE SERVICE VALVE LIQUID LINE BRAZE LINE SET Wrap both service valves with water-saturated cloths as illustrated here and as mentioned in step 4, before brazing to line set. Cloths must remain water-saturated throughout the brazing and cool-down process. WATER-SATURATED CLOTH IMPORTANT — Allow braze joint to cool. Apply additional water-saturated cloths to help cool brazed joint. Do not remove water-saturated cloths until piping has cooled. Temperatures above 250ºF will damage valve seals. 6 VAPOR LINE WATER-SATURATED CLOTH VAPOR LINE SERVICE VALVE

  • Aire-Flo 4AC14LS24P, Page 8 STEP 2 – REFRIGERANT PIPING – Install Indoor Expansion Valve This outdoor unit is designed for use in systems that use either an xed orice (RFC) (included with outdoor unit), or ex- pansion valve metering device (purchased separately) at the indoor coil. See the 4AC14 Product Specications bulletin (EHB) for approved expansion valve kit matchups. NOTE – when a xed orice (RFC) is used with the 4AC14LS18 to 30 models, a liquid line solenoid valve kit (17A09) is required. The expansion valve unit can be installed internal or external to the indoor coil. In applications where an uncased coil is being install

  • Aire-Flo 4AC14LS24P, Page 9 STEP 3 – LEAK TEST AND EVACUATION TO VAPOR SERVICE VALVE HFC-410A MANIFOLD GAUGE SET OUTDOOR UNIT HIGH LOW 1 2 A B NITROGEN NOTE - Position canister to deliver liquid refrigerant. A - With both manifold valves closed, connect the cylinder of HFC-410A refrigerant to the center port of the manifold gauge set. Open the valve on the HFC-410A cylinder (vapor only). B - Open the high pressure side of the manifold to allow HFC-410A into the line set and indoor unit. Weigh in a trace amount of HFC-410A. [A trace amount is a maximum of two ounces (57 g) refrigerant or three pounds (31 kPa) pressu

  • Aire-Flo 4AC14LS24P, Page 10 A - Open both manifold valves and start the vacuum pump. B - Evacuate the line set and indoor unit to an absolute pressure of 23,000 microns (29.01 inches of mercury). NOTE - During the early stages of evacuation, it is desirable to close the manifold gauge valve at least once. A rapid rise in pressure indicates a relatively large leak. If this occurs, repeat the leak testing procedure. NOTE - The term absolute pressure means the total actual pressure above absolute zero within a given volume or system. Absolute pressure in a vacuum is equal to atmospheric pressure minus vacuum pressure. C - When the absolute pressure reaches 23,000 micr

  • Aire-Flo 4AC14LS24P, Page 11 STEP 4 – ELECTRICAL – Circuit Sizing and Wire Routing In the U.S.A., wiring must conform with current local codes and the current National Electric Code (NEC). In Canada, wiring must conform with current local codes and the cur- rent Canadian Electrical Code (CEC). Refer to the furnace or air handler installation instructions for additional wiring application diagrams and refer to unit nameplate for minimum circuit ampacity and maximum overcurrent protection size. 24VAC TRANSFORMER Use the transformer provided with the furnace or air han- dler for low-voltage contro

  • Aire-Flo 4AC14LS24P, Page 12 STEP 4 – ELECTRICAL – (Continued) – High Voltage and Field Control Wiring The following illustration provides an example of control wiring connections when using a standard thermostat. Any excess high voltage field wiring should be trimmed and secured away from any low voltage field wiring. To facilitate a conduit, a cutout is located in the bottom of the control panel. Connect conduit to the control panel using a proper conduit fitting. NOTE - Wire tie provides low voltage control wire strain relief and maintains separation of field-installed low and high voltage circuits. NOTE - For proper voltages, sel

  • Aire-Flo 4AC14LS24P, Page 13 STEP 5 – UNIT START-UP IMPORTANT If unit is equipped with a crankcase heater, it should be energized 24 hours before unit start-up to prevent compressor damage as a result of slugging. 1 - Rotate fan to check for binding. 2 - Inspect all factory- and eld-installed wiring for loose connections. 3 - After evacuation is complete, open the liquid line and vapor line service valve stems to release the refrigerant charge (contained in outdoor unit) into the system. 4 - Replace the stem caps and tighten to the v

  • Aire-Flo 4AC14LS24P, Page 14 (VALVE STEM SHOWN CLOSED) INSERT HEX WRENCH HERE SERVICE PORT CORE SERVICE PORT CAP ANGLE-TYPE SERVICE VALVE (FRONT-SEATED CLOSED) STEM CAP (VALVE STEM SHOWN OPEN) INSERT HEX WRENCH HERE ANGLE-TYPE SERVICE VALVE (BACK-SEATED OPENED) 1 -Remove stem cap with an appropriately sized wrench. 2 -Use a service wrench with a hex-head extension (3/16" for liquid line valve sizes and 5/16" for vapor line valve sizes) to back the stem out counterclockwise as far as it will go. When service valve is CLOSED, the service port is open to the line set and indoor unit. When service valve is OPEN, the service port is open to line set, indoor and out

  • Aire-Flo 4AC14LS24P, Page 15 IMPORTANT Sprinklers and soaker hoses should not be installed where they could cause prolonged exposure to the outdoor unit by treated water. Prolonged exposure of the unit to treated water (i.e., sprinkler systems, soakers, waste water, etc.) will corrode the surface of the steel and aluminum parts, diminish performance and affect longevity of the unit. Thermostat Operation See the thermostat homeowner manual for instructions on how to operate your thermostat. Pre-Service Check If your system fails to operate, check the following before calling for service: • Verify room thermostat settings are correct. • Verify that all electrical disconnect switche

  • Page 16 4AC14 Start-Up and Performance Checklist Customer Address Indoor Unit Model Serial Outdoor Unit Model Serial Notes: START UP CHECKS Refrigerant Type: Rated Load Amps: Actual Amps Rated Volts Actual Volts Condenser Fan Full Load Amps Actual Amps: COOLING MODE Suction Pressure: Liquid Pressure: Supply Air Temperature: Ambient Temperature: Return Air: Tempera

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