Carrier 24APA7 Performance Installation Instructions Manual

Also see for 24APA7 Performance: Product data Wiring diagram

Contents

3Table 1 – Accessory UsageACCESSORYREQUIRED FORLOW--- AMBIENT COOLINGAPPLICATIONS(Below 55°F/12.8_C)REQUIRED FOR LONG LINE AP-PLICATIONS*(Over 80 ft/24.38 m)REQUIRED FOR SEA COASTAPPLICATIONS (Within 2miles/3.22 km)Crankcase Heater Standard Standard StandardEvaporator Freeze ProtectionStandard with Infinityt Control(Low Ambient not allowed withnon ---communicating thermostat)No NoLiquid --- Line Solenoid Valve No No NoLow--- Ambient ControlStandard with Infinity Control(Low ambient not allowed withnon ---communicating thermostat)No NoPuron Refrigerant Balance Port Hard ---ShutOff TXV Yes{ Yes{ Yes{Support Feet Recommended No RecommendedWinter Start ControlStandard with Infinity Control(Low Ambient not allowed withnon ---communicating thermostat)No No* For tubing set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 35 ft. (10.7 m) vertical differential (total equivalent length), refer to the LongLine Guideline—Air Conditioners and Heat Pumps using Puron® Refrigerant.{ Required on all indoor units. Standard on all new Puron refrigerant fan coils and furnace coils.Outdoor Unit Connected to Factory Approved IndoorUnitOutdoor unit contains correct system refrigerant charge foroperation with factory approved AHRI rated indoor unit whenconnected by 15 ft. (4.57 m) of field--supplied or factory--accessorytubing, and factory supplied filter drier. Check refrigerant chargefor maximum efficiency.NOTE: If the indoor furnace coil width is more than the furnacecasing width, refer to the indoor coil Installation Instructions fortransition requirements.Refrigerant Tubing Connection OutdoorConnect vapor and liquid tubes to fittings on vapor and liquidservice valves (see Table 1.) Use refrigerant grade tubingSweat ConnectionCAUTION!UNIT DAMAGE HAZARDFailure to follow this caution may result in equipmentdamage or improper operation.Service valves must be wrapped in a heat--sinking materialsuch as a wet cloth while brazing.Use refrigeration grade tubing. Service valves are closed fromfactory and ready for brazing. After wrapping service valve with awet cloth, braze sweat connections using industry acceptedmethods and materials. Consult local code requirements.Refrigerant tubing and indoor coil are now ready for leak testing.This check should include all field and factory joints.Table 1 – Refrigerant Connections and Recommended Liquidand Vapor Tube Diameters (In.)UNIT SIZE(SERIES)LIQUID RATED VAPOR*Connection& Max. TubeDiameterConnectionDiameterTubeDiameter24 3/8 3/4 3/436 3/8 7/8 7/848 3/8 7/8 1-1/860 3/8 7/8 1-1/8* Units are rated with 25 ft. (7.6 m) of lineset. See Product Data sheet forperformance data when using different size and length linesets.Notes:1. Do not apply capillary tube or fixed orifice indoor coils to these units.2. For Tubing Set lengths between 80 and 200 ft. (24.38 and 60.96 m)horizontal or 35 ft. (10.7 m) vertical differential 250 ft. (76.2 m) TotalEquivalent Length), refer to the Residential Piping and Longline Guideline --- Air Conditioners and Heat Pumps using Puron refrigerant.3. For alternate liquid line options on 18 ---42 size units, see Product Data orResidential Piping and Application GuidelineInstall Liquid--Line Filter Drier IndoorCAUTION!UNIT DAMAGE HAZARDFailure to follow this caution may result in equipmentdamage or improper operation.1. Installation of filter drier in liquid line is required.2. Filter drier must be wrapped in a heat--sinking materialsuch as a wet cloth while brazing.Refer to Fig. 3 and install filter drier as follows:1. Braze 5--in. 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.Flow arrow must point towards indoor coil.4. Connect and braze liquid refrigerant tube to the filter drier.A05178Fig. 3 -- Liquid Line Filter DrierEvacuate Refrigerant Tubing and Indoor CoilCAUTION!UNIT DAMAGE HAZARDFailure to follow this caution may result in equipmentdamage or improper operation.Never use the system compressor as a vacuum pump.Refrigerant tubes and indoor coil should be evacuated using therecommended deep vacuum method of 500 microns. The alternatetriple evacuation method may be used (see triple evacuationprocedure in service manual). Always break a vacuum with drynitrogen.24APA7