installation and start-up instructions
Contents
1. After system is evacuated fully back seat open liquid and vapor service valves 2 Unit is shipped with valve stem s front seated closed and caps installed Replace stem caps after system is opened to refrigerant flow back seated Replace caps finger tight and tighten with wrench an additional 1 12 turn 3 Close electrical disconnects to energize system 4 Set room thermostat at desired temperature Be sure set point is below indoor ambient temperature 5 Set room thermostat to COOL and fan control to ON or AUTO mode as desired Operate unit for 15 minutes Check system refrigerant charge A Sequence of Operation Turn on power to indoor and outdoor units Transformer is energized On a call for cooling thermostat makes circuits R Y and R G Circuit R Y energizes contactor starting outdoor fan motor and compressor circuit R G energizes indoor unit blower relay starting indoor blower motor on high speed When thermostat is satisfied its contacts open de energizing contactor and blower relay Compressor and motors stop If indoor unit is equipped with a time delay relay circuit the indoor blower will run an additional 90 sec to increase system efficiency XII CHECK CHARGE A Unit Charge Factory charge and charging method are shown on unit informa tion plate Puron R 410A refrigerant cylinders contain a dip tube which allows liquid refrigerant to flow from cylinder in upright position Charge Puron2. E Evacuate Refrigerant Tubing and Indoor Coil CAUTION Never use the system compressor as a A y p 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 if the procedure outlined below is followed Always break a vacuum with dry nitrogen 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 fee of air and liquid water See Fig 6 TRIPLE EVACUATION METHOD The triple evacuation method should only be used when vacuum pump is only capable of pumping down to 28 in of mercury vacuum and system does not contain any liquid water Refer to Fig 7 and proceed is as follows 1 Pump system down to 28 in of mercury and allow pump to continue operating for an additional 15 minutes 2 Close service valves and shut off vacuum pump 3 Connect a dry nitrogen cylinder and regulator to system and open until system pressure is 2 psig 4 Close service valve and allow system to stand for 1 hr During this time dry nitrogen will be able to diffuse throughout the system absorbing moisture 5000 4500 4000 LEAK IN 2 3500 SYSTEM 5 3000 amp 2500 2000 VACUUM TIGHT 1900 TOO WET 1000 TIGHT 500 DRY
3. No Ball Bearing Fan Motor For tubing line sets between 50 and 175 ft refer to Application Guideline and Service Manual Air Conditioner with Puron R 410A t For buried line applications refer to Residential Split System Buried Line Application Guideline Only when low pressure switch is used Required for Low Ambient Controller full modulation feature and MotorMaster Control only y y v v BREAK VACUUM WITH DRY NITROGEN v v v CHECK FOR TIGHT DRY SYSTEM IF IT HOLDS DEEP VACUUM y CHARGE SYSTEM Fig 7 Triple Evacuation Method 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 A95425 NOTE Use copper wire only between disconnect switch and unit NOTE Install branch circuit disconnect of adequate size per NEC to handle unit starting current Locate disconnect within sight from and readily accessible from unit per Section 440 14 of NEC A Route Ground and Power Wires Remove access panel to gain access to unit wiring Extend wires from disconnect through power wiring hole provided and into unit control box WARNING The unit cabinet must have an uninter rupted or unbroken ground to minimize personal injury if an electrical fault should occur The ground may consist AN of electrical wire or metal conduit
4. R 410A units with cylinder in upright position and a commercial type metering device in manifold hose Charge refrigerant into suction line NOTE If superheat or subcooling charging conditions are not favorable charge must be weighed in accordance with unit rating plate 0 5 oz ft of 3 8 in liquid line above or below 15 ft respectively EXAMPLE 25 ft 15 ft 10 ft X 0 5 oz ft 5 oz of additional charge B Cooling Only Procedure Units with Cooling Mode TXV Units installed with cooling mode TXV require charging by the subcooling method 1 Operate unit a minimum of 10 minutes before checking charge 2 Measure liquid service valve pressure by attaching an accurate gage to service port 3 Measure liquid line temperature by attaching an accurate thermistor type or electronic thermometer to liquid line near outdoor coil 4 Refer to unit rating plate for required subcooling tempera ture 5 Refer to Table 3 Find the point where required subcooling temperature intersects measured liquid service valve pres sure 6 To obtain required subcooling temperature at a specific liquid line pressure add refrigerant if liquid line tempera ture is higher than indicated or reclaim refrigerant if temperature is lower Allow a tolerance of 3 F Units with Indoor Pistons Units installed with indoor pistons require charging by the super heat method The following procedure is valid when indoor airflow is within 2
5. DAN GER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies hazards which could result in personal injury or death CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage WARNING Before installing modifying or servicing system main electrical disconnect switch must be in the A OFF position There may be more than 1 disconnect switch Lock out and tag switch with a suitable warning label Electrical shock can cause personal injury or death CAUTION Puron R 410A systems operate at A higher pressures than standard R 22 systems Do not use R 22 service equipment or components on Puron R 410A equipment INSTALLATION RECOMMENDATIONS NOTE In some cases noise in the living area has been traced to gas pulsations from improper installation of equipment 1 Locate unit away from windows patios decks etc where unit operation sound may disturb customer 2 Ensure that vapor and liquid tube diameters are appropriate to capacity of unit 3 Run refrigerant tubes as directly as possible by avoiding unnecessary turns and bends Cancels II 550A 24 2 Il 550A 24 3 1 98 A A p A A A Z A Z H f W A97272 Fig 1 4 Leave some slack between structure and unit to absorb vibration 5 When passing refrigerant tubes through the wall seal opening with RTV or other
6. 1 of its rated CFM 1 Operate unit a minimum of 10 minutes before checking charge 2 Measure suction pressure by attaching an accurate gage to suction valve service port Gr TABLE 3 REQUIRED LIQUID LINE TEMPERATURE F REQUIRED SUBCOOLING TEMPERATURE F LIQUID PRESSURE AT SERVICE VALVE PSIG 189 195 202 208 215 222 TABLE 4 SUPERHEAT CHARGING EVAPORATOR ENTERING AIR TEMPERATURE F WB OUTDOOR TEMP F 55 60 65 70 75 80 85 Where a dash appears do not attempt to charge system under these conditions or refrigerant slugging may occur Charge must be weighed in NOTE Superheat F is at low side service port TABLE 5 REQUIRED SUCTION LINE TEMPERATURE F SUPERHEAT TEMP F SUCTION PRESSURE AT SERVICE PORT PSIG 3 Measure suction temperature by attaching an accurate thermistor type or electronic thermometer to suction line at service valve 4 Measure outdoor air dry bulb temperature with thermom eter 5 Measure indoor air entering indoor coil wet bulb tempera ture with a sling psychrometer 6 Refer to Table 4 Find outdoor temperature and ev
7. AT FAN COIL CONDITIONER 24 VAC HOT SEE NOTE 2 A97366 Fig 9 Typical 24 v Circuit Connections 9 BRYANT NON PROGRAMMABLE THERMOSTAT FK4C AIR MODEL AC FAN COIL CONDITIONER 24 VAC HOT 24 VAC COM HEAT STAGE 1 COOL STAGE 1 INDOOR FAN A97363 OTHER NON PROGRAMMABLE FK4C AIR AC THERMOSTAT FAN COIL CONDITIONER J1 JUMPER 24 VAC HOT HEAT STAGE 1 SEE COOL STAGE 1 NOTE 2 INDOOR FAN A97365 NOTES BRYANT PROGRAMMABLE THERMOSTAT FK4C AIR MODEL AC FAN COIL CONDITIONER 24 VAC HOT INDOOR FAN J1 JUMPER HEAT STAGE 1 J2 JUMPER COOL STAGE 1 NOT USED NOT USED SEE NOTE 2 24 VAC COM NOT USED NOT USED OPTIONAL OUTDOOR SENSOR CONNECTION A97364 1 BRYANT THERMOSTAT WIRING DIAGRAMS ARE ONLY ACCURATE FOR MODEL NUMBERS BEGINNING WITH TSTAT 2 WIRING MUST CONFORM TO NEC OR LOCAL CODES 3 SOME UNITS ARE EQUIPPED WITH PRESSURE SWITCH ES TEMPERATURE SWITCH OR 5 MINUTE COMPRESSOR CYCLE PROTECTION CONNECT 24 V FIELD WIRING TO FACTORY PROVIDED STRIPPED LEADS 4 A LIQUID LINE SOLENOID VALVE IS REQUIRED ON SOME UNITS SEE SPECIFIC UNIT INSTRUCTIONS 5 THERMOSTATS ARE FACTORY CONFIGURED WITH 5 MINUTE COMPRESSOR CYCLE PROTECTION AND 4 CYCLES PER HOUR LIMIT SEE THERMOSTAT INSTALLATION INSTRUCTIONS FOR DETAILS 6 TO STAGE ELECTRIC RESISTANCE HEAT CONSULT OUTDOOR THERMOSTAT INSTALLATION INSTRUCTIONS LEGEND 24 V FACTORY WIRING 24 V FIELD WIRING FIEL
8. D SPLICE CONNECTION CONTACTOR A97368 Fig 9 Typical 24 v Circuit Connections Continued 10 SERVICE TRAINING Packaged Service Training programs are an excellent way to increase your knowledge of the equipment discussed in this manual including e Unit Familiarization e Maintenance e Installation Overview e Operating Sequence A large selection of product theory and skills programs is available using popular video based formats and materials All include video and or slides plus companion book Classroom Service Training plus hands on the products in our labs can mean increased confidence that really pays dividends in faster troubleshooting fewer callbacks Course descriptions and schedules are in our catalog CALL FOR FREE CATALOG 1 800 962 9212 Packaged Service Training Classroom Service Training A94328 1998 Bryant Heating amp Cooling Systems 7310 W Morris St Indianapolis IN 46231 2 Printed in U S A 550A243 Catalog No 5355 004
9. LL OST HANGER STRAP AROUND VAPOR N INSULATION VAPOR TUBE o o o 3 MIN gt Lee LIQUID TUBE SUSPENSION A94028 Fig 2 Connecting Tubing Installation INSTALLATION Specifications for this unit in residential new construction market require the outdoor unit indoor unit refrigerant tubing sets metering device and filter drier listed in presale literature There can be no deviation Consult the Application Guideline and Service Manual Air Conditioner with Puron R 410A Refrig erant to obtain required unit changes for specific applications and for R 22 retrofit I CHECK EQUIPMENT AND JOB SITE A Unpack Unit Move to final location Remove carton taking care not to damage unit B Inspect Equipment File claim with shipping company prior to installation if shipment is damaged or incomplete Locate unit rating plate on unit corner panel It contains information needed to properly install unit Check rating plate to be sure unit matches job specifications ll INSTALL ON A SOLID LEVEL MOUNTING PAD If conditions or local codes require the unit be attached to pad tie down bolts should be used and fastened through knockouts provided in unit base pan Refer to unit mounting pattern in Fig 3 to determine base pan size and knockout hole location On rooftop applications mount on level platform or frame Place unit above a load bearing wall and isolate unit and tubing set from structure Arrange supporting membe
10. SYSTEM 0 1 2 3 4 5 6 7 MINUTES A95424 Fig 6 Deep Vacuum Graph 5 Repeat this procedure as indicated in Fig 7 System will then be free of any contaminants and water vapor Vill MAKE ELECTRICAL CONNECTIONS WARNING To avoid personal injury or death do not AN supply power to unit with compressor terminal box cover removed 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 TABLE 2 ACCESSORY USAGE REQUIRED FOR LOW AMBIENT APPLICATIONS BELOW 55 F Yes ACCESSORY Crankcase Heater REQUIRED FOR APPLICATIONS LONG LINE OVER 50 FT REQUIRED FOR BURIED LINE APPLICATIONS OVER 3 FT REQUIRED FOR SEA COAST APPLICATIONS WITHIN 2 MILES No Evaporator Freeze Thermostat Yes No Winter Start Control Yes No Accumulator No No Compressor Start Assist Capacitor and Relay ve No Low Ambient Controller MotorMaster Control or Low Ambient Pressure Switch Yes No No Wind Baffle See Low Ambient Instructions No No Coastal Filter No No Yes Support Feet Recommended No Recommended Liquid Line Solenoid Valve or No Hard Shutoff TXV See Long Line Application Guideline
11. TON 2 BODY J A a a FIELD ie R 7 CONNECTION i STRAINER Ne XS FLARE K ADAPTOR LIQUID LINE STRAINER APPROX 2 LONG 3 STRAINER LABEL AFFIX TO LIQ LINE NEAR STRAINER LOCATION A95615 Fig 4 Check Flo Rater Components VII MAKE PIPING CONNECTIONS WARNING Relieve pressure and recover all refrigerant A 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 CAUTION Do not leave system open to atmosphere any longer than minimum required for installation POE A oil in compressor is extremely susceptible to moisture absorption Always keep ends of tubing sealed during installation CAUTION If ANY refrigerant tubing is buried provide a 6 in vertical rise at service valve Refrigerant tubing A lengths up to 36 in may be buried without further special consideration For lengths above 36 in refer to the Residential Split System Buried Line Application Guide line CAUTION To prevent damage to unit or service valves observe the following Afe Use a brazing shield e Wrap service valves with wet cloth or use a heat sink material pac 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 sub
12. aporator entering air wet bulb temperature At this intersection note superheat 7 Refer to Table 5 Find superheat temperature located in item 6 and suction pressure At this intersection note suction line temperature 8 If unit has a higher suction line temperature than charted temperature add refrigerant until charted temperature is reached 9 If unit has a lower suction line temperature than charted temperature reclaim refrigerant until charted temperature is reached 7 10 When adding refrigerant charge in liquid form into suction service port using a flow restricting device 11 If outdoor air temperature or pressure at suction valve changes charge to new suction line temperature indicated on chart XIII FINAL CHECKS IMPORTANT Before leaving job be sure to do the following 1 Ensure that all wiring and tubing is secure in unit before adding panels and covers Securely fasten all panels and covers 2 Tighten service valve stem caps to 1 12 turn past finger tight 3 Leave User s Manual with owner Explain system operation and periodic maintenance requirements outlined in manual 4 Fill out Dealer Installation Checklist and place in customer file CARE AND MAINTENANCE Frequency of maintenance may vary depending upon geographic For continuing high performance and to minimize possible equip areas such as coastal applications See Users Manual for informa ment failure periodic maintenan
13. ce must be performed on this tion equipment PURON R 410A QUICK REFERENCE GUIDE e Puron R 410A refrigerant operates at 50 70 percent higher pressures than R 22 Be sure that servicing equipment and replacement components are designed to operate with R 410A e Puron R 410A refrigerant cylinders are rose colored e Puron R 410A refrigerant cylinders have a dip tube which allows liquid to flow out of cylinder in upright position e Recovery cylinder service pressure rating must be 400 psig DOT 4BA400 or DOT BW400 e Puron R 410A systems should be charged with liquid refrigerant Use a commercial type metering device in the manifold hose e Manifold sets should be 800 psig high side and 250 psig low side with 550 psig low side retard e Use hoses with 800 psig service pressure rating e Leak detectors should be designed to detect HFC refrigerant e Puron R 410A as with other HFCs is only compatible with POE oils e Vacuum pumps will not remove moisture from oil e Do not use liquid line filter driers with rated working pressures less than 600 psig Do not install a suction line filter drier in liquid line e POE oils absorb moisture rapidly Do not expose oil to atmosphere Wrap all filter driers and service valves with wet cloth when brazing A liquid line filter drier is required on every unit e Do NOT use an R 22 TXV e If indoor unit is equipped with an R 22 TXV it must be changed to an Pur
14. installation and start up instructions 12 13 14 SEER SPLIT SYSTEM AIR CONDITIONERS WITH PURON R 410A REFRIGERANT NOTE Read the entire instruction manual before starting the installation This symbol indicates a change since the last issue SAFETY CONSIDERATIONS Improper installation adjustment alteration service maintenance or use can cause explosion fire electrical shock or other conditions which may cause death personal injury or property damage Consult a qualified installer service agency or your distributor or branch for information or assistance The qualified installer or agency must use factory authorized kits or accessories when modifying this product Refer to the individual instructions packaged with the kits or accessories when installing Follow all safety codes Wear safety glasses protective clothing and work gloves Use quenching cloth for brazing operations Have fire extinguisher available Read these instructions thor oughly and follow all warnings or cautions included in literature and attached to the unit Consult local building codes and National Electrical Code NEC for special requirements Recognize safety information This is the safety alert symbol N When you see this symbol on the unit and in instructions or manuals be alert to the potential for personal injury Understand the signal words DANGER WARNING and CAU TION These words are used with the safety alert symbol
15. nit is to be installed with a piston metering device proceed as follows 1 Check indoor coil piston to see if it matches the required piston shown on outdoor unit rating plate If it does not match replace indoor coil piston with piston shipped with outdoor unit The piston shipped with outdoor unit is correct for any approved indoor coil combination 2 After correct piston is installed locate neoprene piston ring shipped in piston bag Install piston ring behind metering piston as shown in Fig 4 The piston ring ensures that piston stays seated during all operating conditions VI INSTALL TXV 556A STANDARD 552A 550A OPI TONAL NOTE ALL 556A UNITS MUST BE INSTALLED WITH A TXV NO EXCEPTIONS The thermostatic expansion valve is specifically designed to operate with Puron R 410A Do not use an R 22 TXV An existing R 22 TXV must be replaced with a factory approved TX V specifically designed for Puron R 410A To replace an R 22 TXV refer to Installation Instructions packaged with accessory kit NOTE FK4 and FC4 fan coils are equipped with an R 22 TXV If an FK4 or an FC4 fan coil is used with an Puron R 410A air conditioner the R 22 TXV must be replaced with an Puron R 410A TXV or with the accessory piston body kit and piston shipped with outdoor unit CAUTION Remove indoor coil piston if unit is to be installed on system with a TXV metering device PISTON RETAINER PISTON PISTON ae S PIS
16. on R 410A TXV e Never open system to atmosphere while it is under a vacuum e When system must be opened for service evacuate then break vacuum with dry nitrogen and replace filter driers e Do not vent Puron R 410A into the atmosphere e Do not use capillary tube coils e Observe all warnings cautions and bold text BRYANT NON PROGRAMMABLE THERMOSTAT SINGLE STAGE AIR MODEL AC FURNACE CONDITIONER 24 VAC HOT RF 24 VAC COM SEE HEAT STAGE 1 W W1 NOTE 2 COOL STAGE 1 INDOOR FAN a A97359 BRYANT PROGRAMMABLE THERMOSTAT SINGLE STAGE AIR MODEL AC FURNACE CONDITIONER 24 VAC HOT INDOOR FAN HEAT STAGE 1 COOL STAGE 1 NOT USED SEE NOTE 2 NOT USED 24 VAC COM NOT USED NOT USED OPTIONAL OUTDOOR SENSOR CONNECTION A97361 OTHER NON PROGRAMMABLE SINGLE STAGE AIR AC THERMOSTAT FURNACE CONDITIONER 24 VAC HOT SEE HEAT STAGE 1 NOTE 2 COOL STAGE 1 INDOOR FAN A97367 BRYANT NON PROGRAMMABLE FA FB FC THERMOSTAT FD FF AIR MODEL AC FAN COIL CONDITIONER 24 VAC HOT RF 24 VAC COM SEE HEAT STAGE 1 W W1 NOTE 2 COOL STAGE 1 INDOOR FAN A97360 BRYANT PROGRAMMABLE FA FB THERMOSTAT FC FD FF AIR MODEL AC FAN COIL CONDITIONER 24 VAC HOT INDOOR FAN HEAT STAGE 1 COOL STAGE 1 NOT USED SEE NOTE 2 NOT USED 24 VAC COM NOT USED NOT USED OPTIONAL SENSOR CONNECTION A97362 OTHER FA FB FC NON PROGRAMMABLE FD FF AIR AC THERMOST
17. onnect vapor tube to fitting on outdoor unit vapor service valves Connect liquid tube to filter drier See Fig 5 and Table 1 Use refrigerant grade tubing D Sweat Connection CAUTION To avoid valve damage while brazing ser A vice valves must be wrapped in a heat sinking material such as a wet cloth Service valves are closed from factory and ready for brazing After wrapping service valve and filter drier with a wet cloth tubing set can be brazed to service valve and filter drier using either silver bearing or non silver bearing brazing material 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 LIQUID AND VAPOR TUBE DIAMETERS IN VAPOR LONG LINE UNIT SIZE LIQUID Connection Diameter Tube Diameter Connection Diameter Tube Diameter Connection Diameter Tube Diameter 024 3 8 3 8 5 8 5 8 5 8 3 4 030 036 3 8 3 8 3 4 3 4 3 4 7 8 042 048 3 8 3 8 7 8 7 8 7 8 1 1 8 060 3 8 3 8 7 8 1 1 8 7 8 1 1 8 NOTES 1 Tube diameters are for lengths up to 50 ft For tubing lengths greater than 50 ft consult Application Guideline and Service Manual Air Conditioner with Puron R 410A 2 Do not apply capillary tube indoor coils to these units
18. pliable silicon based caulk See Fig 2 6 Avoid direct tubing contact with water pipes duct work floor joists wall studs floors and walls 7 Do not suspend refrigerant tubing from joists and studs with a rigid wire or strap which comes in direct contact with tubing See Fig 2 8 Ensure that tubing insulation is pliable and completely surrounds vapor tube 9 When necessary use hanger straps which are 1 in wide and conform to shape of tubing insulation See Fig 2 10 Isolate hanger straps from insulation by using metal sleeves bent to conform to shape of insulation When outdoor unit is connected to factory approved indoor unit outdoor unit contains system refrigerant charge for operation with ARI rated indoor unit with highest sales volume when connected by 15 ft of field supplied or factory accessory tubing For proper unit operation check refrigerant charge using charging informa tion located on control box cover IMPORTANT Maximum liquid line size is 3 8 in O D for all residential applications including long line IMPORTANT Always install the factory supplied liquid line filter drier If replacing the filter drier refer to Product Data Sheet for appropriate part number Obtain replacement filter driers from or your distributor or branch NOTE Avoid contact between tubing and structure OUTDOOR WALL INDOOR WALL CAULK ar F LIQUID TUBE A t VAPOR TUBE INSULATION THROUGH THE WA
19. r only set thermostat to OFF and close electrical disconnect to outdoor unit A crankcase heater is required if refrigerant tubing is longer than 50 ft Refer to Application Guideline and Service Manual Air Conditioner with Puron R 410A X INSTALL ELECTRICAL ACCESSORIES Refer to the individual instructions packaged with kits or acces sories when installing XI START UP CAUTION To prevent compressor damage or personal injury observe the following e Do not overcharge system with refrigerant Do not operate unit in a vacuum or at negative pressure e Do not disable low pressure switch In scroll compressor applications e Dome temperatures may be hot e In 3 phase application incorrect phasing will cause reverse rotation resulting in elevated noise levels equal ized pressures and reduced current draw Correct by reversing power connection L1 and L2 on contactor CAUTION To prevent personal injury wear safety glasses protective clothing and gloves when handling refrigerant and observe the following e Back seating service valves are not equipped with Schrader valves Fully back seat counter clockwise valve stem before removing gage port cap e Front seating service valves are equipped with Schrader valves CAUTION Do not vent refrigerant to atmosphere Re cover during system repair or final unit disposal Follow these steps to properly pump down a system and avoid negative suction pressure 1
20. rs to adequately support unit and minimize transmission of vibration to building Consult local codes governing rooftop applications Roof mounted units exposed to winds above 5 mph may require wind baffles Consult the Application Guideline and Service Manual Air Conditioner with Puron R 410A Refrigerant for wind baffle construction NOTE Unit must be level to within 2 3 8 in ft per compressor manufacturer specifications 8 He 34 IN DIA TIEDOWN KNOCKOUTS 2 PLACES IN BASEPAN DIMENSIONS IN UNIT MINIMUM TIEDOWN KNOCKOUT LOCATIONS MOUNTING PAD SIZE A97375 DIMENSIONS 024 060 26 X 32 Fig 3 Mounting Unit to Pad lll CLEARANCE REQUIREMENTS When installing allow sufficient space for airflow clearance wiring refrigerant piping and service Allow 30 in clearance to service end of unit and 48 in above unit For proper airflow a 6 in clearance on 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 On rooftop applications locate unit at least 6 in above roof surface IV OPERATING AMBIENTS The minimum outdoor operating ambient in cooling mode is 55 F and the maximum outdoor operating ambient in cooling mode is 125 F V CHECK INDOOR CHECK FLO RATER PISTON AND INSTALL PISTON RING 552A 550A STANDARD If u
21. stan tial capacity and performance losses can occur Following the recommendations in the Application Guideline and Service Manual Air Conditioner with Puron R 410A Refrigerant 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 A Outdoor Unit Connected to Factory Approved Indoor Unit Outdoor unit contains correct system refrigerant charge for opera tion with ARI rated indoor unit with highest sales volume when connected by 15 ft of field supplied or factory accessory tubing Check refrigerant charge for maximum efficiency B Install Liquid Line Filter Drier A CAUTION Installation of filter drier in liquid line is required Refer to Fig 5 and install filter drier as follows 1 Braze 5 in connector tube to liquid service valve Wrap filter drier with damp cloth 2 Braze filter drier between connector tube and liquid tube to indoor coil Flow arrow must point towards indoor coil LIQUID LINE Pa FILTER DRIER LIQUID SERVICE TUBE A95509 Fig 5 Liquid Line Filter Drier C Refrigerant Tubing C
22. when installed in accordance with existing electrical codes Failure to follow this warning can result in an electric shock fire or death B Connect Ground and Power Wires Connect ground wire to ground connection in control box for safety Connect power wiring to contactor as shown in Fig 8 C Connect Control Wiring Route 24 v control wires through control wiring grommet and connect leads to control wiring See Fig 9 Use No 18 AWG color coded insulated 35 C minimum wire If thermostat is located more than 100 ft from unit as measured along the control voltage wires use No 16 AWG color coded wire to avoid excessive voltage drop All wiring must be NEC Class 1 and must be separated from incoming power leads Use furnace transformer fan coil transformer or accessory trans former for control power 24 v 40 va minimum NOTE Use of available 24 v accessories may exceed the mini mum 40 va power requirement Determine total transformer load ing and increase the transformer capacity or split the load with an accessory transformer as required 5s DISCONNECT PERN E C AND OR LOCAL CODES CONTACTOR FIELD POWER O l WIRING C One FIELD GROUND WIRING GROUND LUG A91056 Fig 8 Line Power Connections IX COMPRESSOR CRANKCASE HEATER When equipped with a crankcase heater furnish power to heater a minimum of 24 hr before starting unit To furnish power to heate
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