Installation Manual FS4BE
Contents
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4. COMPRESSOR DUAL OPTIONAL CONTACTS CAPACITOR S OUTDOOR FAN MOTOR YELLOW RED OR RED BLACK 19 CONTACTOR OUTDOOR FAN MOTOR YELLOW BLACK 1 I l 1 GROUNDING 12 SCREW CRANKCASE 24 VOLT FIELD HEATER CONNECTIONS SEE NOTE 6 OPTIONAL LEGEND CC Contactor Coil FIELD WIRING CCH Crankcase Heater LOW VOLTAGE 710388B HPS High Pressure Switch HIGH VOLTAGE Replaces 710388A 0109 Figure 4 Single Phase Air Conditioner without CoreSense 1 5 4 Ton Models L LO 9 ALON 335 MAYS IHM 18 yO JINON 353359909 a 034 YOLOVLNOO MOTNJA YOLOW 5 jou 8 105 nq pay pijos dip USe y uey Ndu yz lt sey PUNI 61 52 pay 6 1810 xO 5000 y UILUZ lt Sdi uay UG lt sun JossadwoD uny Josseidwoy 9 ysejy A O A Ea ISTO 45814 1810 XO suoo y juo Buluun s sossaidwog yous 524 Z 45814 210 XO y JO su JO no eunssaud ns 10 yos q 5 Joses dwog z Use Y N pajqesip
5. to this unit as listed in Table 1 Use proper code agency listed conduit and a conduit connector for connecting the supply wires to the unit Use of rain tight conduit is recommended 208 230 Volt units are shipped from the factory wired for 230 volt operation For 208V operation remove the lead from the transformer terminal marked 240V and connect it to the terminal marked 208V Optional equipment requiring connection to the power or control circuits must be wired in strict accordance of the NEC ANSI NFPA 70 applicable local codes and the instructions provided with the equipment Grounding Ax WARNING The unit cabinet must have an uninterrupted or unbroken electrical ground to minimize personal injury if an electrical fault should occur Do not use gas piping as an electrical ground This unit must be electrically grounded in accordance with local codes or in the absence of local codes with the National Electrical Code ANSI NFPA 70 or the CSA C22 1 Electrical Code Use the grounding lug provided in the control box for grounding the unit CoreSense Diagnostics Module Select Models Only The CoreSense Diagnostics Module Figure 2 is a breakthrough innovation for troubleshooting heatpump and air conditioning system failures The module installs easily inthe electrical box of the outdoor unit near the compressor contactor By using the compressor as asensor CoreSense Diagnostics helps the service technician more accu
6. Air Circulation Indoor Blower 1 Set the thermostat system mode on OFF and the fan mode to ON 2 Verify the blower runs continuously Check the air delivery at the supply registers and adjust register openings for balanced air distribution If insufficient air is detected examine ductwork for leaks or obstructions 3 Set the thermostat fan mode to AUTO and verify the blower stops running System Coolin 1 Set the thermostat s system mode to COOL and the fan mode to AUTO Gradually lower the thermostat temperature setpoint below room temperature and verify the outdoor unit and indoor blower energize 2 Verify blower wheel is spinning in direction indicated by arrow Feel the air being circulated by the indoor blower and verify that it is cooler than ambient temperature Listen for any unusual noises If unusual sounds occur determine the source of the noise and correct as necessary 3 Verify and LO refrigerant pressures 4 Allow the system to operate for several minutes and then set the temperature selector above room temperature Verify the fan and compressor cycle off with the thermostat NOTE The blower should also stop unless fan mode is set to the ON position System Heating optional 1 Set the thermostat s system mode to HEAT and the temperature mode above room temperature 2 Verify the optional heating equipment furnace electric heat and indoor blower energize Feel the air being circulated by the i
7. the PROT terminal is greater than 2A Current gt 2A for 40ms Red Flash9 Yellow Off Trip Solid Red Demand is present but compressor is not running N A Table 3 LED Diagnostics for CoreSense Diagnostics Module N A 13 14 15 INSTALLATION PERFORMANCE CHECK LIST INSTALLATION ADDRESS SHB CUMIN UA Electrical connections tight YES CITY STATE Line voltage polarity correct YES UNIT MODEL Rated Voltage 2 2 ojo UNIT SERIAL L1 L2 Volts INSTALLER NAME L1 L3 Volts CITY Unit Installed Minimum clearances shown on page 3 L2 L3 Volts Avg Volts Has the owner s information been reviewed with the customer Max deviation of voltage i from avg volts Has the Literature Package been left with the unit YES Volt imbalance REFRIGERATION SYSTEM Was unit given 24 hr warm up period YES NO Blower Motor HP Sheave Setting for crankcase heaters Has the thermostat been calibrated YES Stage 1 Liquid Pressure high side Is the thermostat level Is the heat anticipator setting correct YES NO Stage 1 Suction Pressure low side If Applicable REPLACEMENT PARTS Replacement parts are available through all Nordyne distributors Please have the complete model and serial number of the unit when ordering replacement parts Electrical Capacitors Temperature Limit Switches Compressors Th
8. ATION m Remove refrigerant if above the curve D o 5 a i o 2 5 a Add refrigerant if below the curve 95 add or remove refrigerant if H pressure reading is between unit 100 105 110 115 120 125 130 135 Liquid Temperature F Figure 3 Charging Chart for S4BE 024 060 Series 2 5 Ton Units TXV Matches ELECTRICAL DIAGRAMS amp TABLES WIRING DIAGRAM Split System Air Conditioner Outdoor Section Single Phase NOTES Disconnect all power before servicing 1 Couper le courant avant de faire letretien For supply connections use copper conductors only 2 Employez uniquement des conducteurs en cuivre Not suitable on systems that exceed 150 volts to ground 3 Ne convient pas aux installations de plus de 150 volt a la terre For replacement wires use conductors suitable for 105 deg C For ampacities and overcurrent protection see unit rating plate Connect to 24 vac 40ca class 2 circuit See furnace airhandler installation instructions for control circuit and optional relay transformer kits Anti Short Cycle Timer ASCT may or may not be installed in the unit If desired ASCT is factory installed on select models only or may be field installed as shown using manufacturers approved kit If not present connect Yellow and Black wires per Note 6 jm 208 230 ORANGE CCH
9. SPLIT SYSTEM AIR CONDITIONER 14 SEER SINGLE PHASE MODELS INSTALLATION INSTRUCTIONS S4BE SA4BE 018 024 030 036 042 048 amp 060 1 5 2 2 5 3 3 5 4 amp 5 Ton Series IMPORTANT ATTENTION INSTALLERS It is your responsibility to know this product better than your customer This includes being able to install the product according to strict safety guidelines and instructing the customer on how to operate and maintain the equipment for the life of the product Safety should always be the deciding factor when installing this product and using common sense plays an important role as well Pay attention to all safety warnings and any other special notes highlighted in the manual Improper installation of the furnace or failure to follow safety warnings could result in serious injury death or property damage These instructions are primarily intended to assist qualified individuals experienced in proper installation of this appliance Some local codes require licensed installation service personnel for this type of equipment Please read all instructions carefully before starting the installation Return these instructions to the customer s package for future reference DO NOT DESTROY PLEASE READ CAREFULLY amp KEEP IN A SAFE PLACE FOR FUTURE REFERENCE IMPORTANT SAFETY INFORMATION AIR CONDITIONER INSTALLATION General Information Before You Install this Unit Locating the Air conditioner Packag
10. ccordance with those shown in Figure 1 A suitable mounting pad Figure 1 must be provided and separate from the building foundation The pad must be level and strong enough to support the weight of the unit The slab height must be a minimum of 2 5 cm above grade and with adequate drainage Roof Mount The method of mounting should be designed so that it does not overload roof structures or transmit noise to the interior of the structure The roof mustbe structurally capable of handling the weight of the unit Full perimeter support is required under the unit Support must be made of weather resistant materials and installed prior to unit installation The support must be built to raise the unit 6 above the roof 6 from Building or Structure 24 for Service Access DONOT OBSTRUCT TOP OF UNIT NOTE Units require full perimeter clearances Installer must maintain 18 between two units or 12 between single unit and structure y 2 Mounting Pad Figure 1 Clearance Requirements Connecting Refrigerant Tubing Between the Indoor amp Outdoor Unit A CAUTION When servicing cover or seal openings to minimize the exposure of the refrigerant system to air to prevent accumulation of moisture and other contaminants After outdoor and indoor unit placement has been determined route refrigerant tubing between the equipmentin accordance with sound installation practices When co
11. come familiar with the wiring diagram before making any electrical connections to the outdoor unit Anelectrical disconnect must be located within sight of and readily accessible to the unit This switch shall be capable of electrically de energizing the outdoor unit Line voltage to the unit should be supplied from a dedicated branch circuit containing the correct fuse or circuit breaker for the unit Incoming field wiring and minimum size of electrical conductors and circuit protection must be in compliance with information listed onthe outdoor unit data label Any other wiring methods must be acceptable to authority having jurisdiction The outdoor unit requires both power and control circuit electrical connections Refer to the wiring diagram schematic Figures 4 7 for identification and location of outdoor unit field wiring interfaces Make all electrical connections in accordance with all applicable codes and ordinances Overcurrent protection must be provided at the branch circuit distribution panel and sized as shown on the unit rating label and according to applicable local codes See the unit rating plate for minimum circuit ampacity and maximum overcurrent protection limits Provide power supply for the unit in accordance with the unit wiring diagram and the unit rating plate Connect the line voltage leads to the terminals on the contactor inside the control compartment Use only copper wire for the line voltage power supply
12. d before routing the refrigerant tubing Refer to the indoor unit s installation instructions for installation details Allunits are securely packed at the time of shipmentand upon arrival should be carefully inspected for damage prior to installing the equipment at the job site Verify coil fins are straight If necessary comb fins to remove flattened or bent fins Claims for damage apparent or concealed should be filed immediately with the carrier Please consult your dealer for maintenance information and availability of maintenance contracts Please read all instructions before installing the unit Locating the Air Conditioner Survey the job site to determine the best location for mounting the outdoor unit Sufficient clearance for unobstructed airflow through the outdoor coil must be maintained in order to achieve rated performance See Figure 1 for minimum clearances to obstructions Overhead obstructions Figure 1 poorly ventilated areas and areas subject to accumulation of debris should be avoided Consideration should be given to availability of electric power service access noise and shade Packaging Removal NOTE To prevent damage to the tubing connections carefully remove the carton and user s manual from the equipment Discard the shipping carton Ground Level Ground level installations must be located according to local building codes or ordinances and these requirements Clearances must be in a
13. equipment Refrigerant and electrical line should be routed through suitably waterproofed openings to prevent water from leaking into the structure e e e e AIR CONDITIONER INSTALLATION General Information The S4BE series air conditioner is designed only for outdoor rooftop or ground level installations This unit has been tested for capacity and efficiency in accordance with AHRI Standards and will provide many years of safe and dependable comfort providing it is properly installed and maintained Abuse improper use and or improper maintenance can shorten the life of the appliance and create unsafe hazards To achieve optimum performance and minimize equipment failure it is recommended that periodic maintenance be performed on this unit The ability to properly perform maintenance on this equipment requires certain mechanical skills and tools Before You Install this Unit The cooling load of the area to be conditioned must be calculated and a system of the proper capacity selected It is recommended that the area to be conditioned be completely insulated and vapor sealed Check the electrical supply and verify the power supply is adequate for unit operation The system must be wired and provided with circuit protection in accordance with local building codes If there is any question concerning the power supply contact the local power company The indoor section air handler furnace etc should be installe
14. ermostats Contactors Time Delay Relays Pressure Switches Transformers Relays AL Motors rau mei CERTIFIED www ahridirectory org ower otor oo US Fan Motor Unitary Small AC LISTED AHRI Standard 210 240 Components Certification applies only when the complete system is listed with AHRI Intertek Blower Assembly Fan Grille Cabinet Panels Filter Driers We E A haba eth pa Expansion Valves YOUR ENVIRONMENT OUR EXPERTISE aH igi 5 rou echnician v MEMBER COMPANY Certification by NATE NORDYNE COMPLETE COMFORT GENUINE VALUE Specifications amp illustrations subject to change without notice or incurring obligations II Ii Il Fallon MO Printed in U S A 04 13 7096060 Replaces 7094320
15. igerant to the amount specified on the unit rating label The refrigerant charging chart is valid for a variety of indoor return air conditions and are most influenced by the outdoor ambient temperature outdoor fan operation and the unit operating voltage Before using this chart make sure the unit is in a stable operating mode As shown in Figure 3 page 8 the ideal system sub cooling can vary over the range of operation Reference the charts to determine the ideal amount of sub cooling for a given liquid pressure Units charged to other values will not perform atthe rated unit efficiency EER orrated Coefficient of Performance COP in heating mode Toinspecta systems operation using quality instruments match the measured liquid temperature to the units table The measured liquid pressure reading should be within 3 of the table value for most installations For systems that are operating with more than a 5 deviation inspect the unit for the proper voltage and phase balance and the refrigeration system for leaks Units that are operating at less then 95 of the nominal voltage or with a 2 phase imbalance may see a more significant deviation than the amount stated above DONOTusethe charts in systems that have a fan cycling under low ambient control Refer to the low ambient kit instructions for more information If applicable S4BE SA4BE Charging Chart 1 5 3 5 TON MODELS 2 2 5 3 5 4 TON MODELS R 410A SATUR
16. ing Removal Ground Level Roof Mount Connecting Refrigerant Tubing between the Indoor amp Outdoor Unit ELECTRICAL WIRING Pre Electrical Checklist Line Voltage Grounding CoreSense Diagnostics Module Compressor Protection Resetting Alert Codes Thermostat Low Voltage Connections STARTUP amp ADJUSTMENTS Pre Start Checklist Start up Procedures Air Circulation Indoor Blower System Cooling System Heating AIR CONDITIONER MAINTENANCE REFRIGERANT CHARGING Charging the Unit in AC Mode with Outdoor Temperatures Above 55 Application Notes for Using the Charging Chart 8 ELECTRICAL DIAGRAMS amp TABLES Figure 4 W D 1 5 4 Ton w out CoreSense 9 Figure 5 W D 1 5 4 Ton with CoreSense Figure 6 W D 5 Ton w out CoreSense Figure 7 W D 5 Ton with CoreSense Table 3 CoreSense LED Diagnostics INSTALL PERFORMANCE CHECKLIST REPLACEMENT PARTS IMPORTANT SAFETY INFORMATION INSTALLER Please read all instructions before servicing this equipment Pay attention to all safety warnings and any other special notes highlighted in the manual Safety markings are used frequently throughout this manual to designate a degree or level of seriousness and should not be ignored WARNING indicates a potentially hazardous situation that if not avoided could result in personal injury or death CAUTION indicates a potentially hazardous situation that if not avoided may result in minor or moderate injur
17. ional equipment such as liquid line solenoid valves low ambient etc should be installed in strict accordance with the manufacturer s installation instructions ELECTRICAL WIRING Ax WARNING To avoid risk of electrical shock personal injury or death disconnect all electrical power to the unit before performing any maintenance or service The unit may have more than one electrical supply Label all wires prior to disconnection when servicing the unit Wiring errors can cause improper and dangerous operation All electrical connections must be in compliance with all applicable local codes and ordinances and with the current revision of the National Electric Code ANSI NFPA 70 For Canadian installations the electrical connections and grounding shall comply with the current Canadian Electrical Code CSA C22 1 and or local codes Pre Electrical Checklist Verify that the voltage frequency and phase of the supply source match the specifications on the unit rating plate y Verify that the service provided by the utility is sufficient to handle the additional load imposed by this equipment Refer to the unit wiring label for proper voltage wiring Verify factory wiring is in accordance with the unit wiring diagram Figures 4 7 pages 9 12 Inspect for loose connections Line Voltage A wiring diagram is located on the inside cover of the electrical box of the outdoor unit The installer should be
18. ly sealed at the factory and does not require lubrication REFRIGERANT CHARGING A WARNING S4BE Split System Air Conditioners are shipped charged with R410A refrigerant and ready for installation If repairs make it necessary for evacuation and charging it should only be attempted by qualified trained personnel thoroughly familiar with this equipment Under no circumstances should the owner attempt to install and or service this equipment Failure to comply with this warning could resultin property damage personal injury or death After refrigerant line connections are completed it is required that you leak check and evacuate the indoor section and all line connections using proper methods before finalizing the full system refrigerant charge installed and located in the suction line internal to the outdoor unit The switch is designed to protect the compressor from a loss of charge Under normal conditions the switch is closed If the suction pressure falls below 5 psig then the switch will open and de energize the outdoor unit The switch will close again once the suction pressure increases above 20 psig Please note that the switch interrupts the thermostat inputs to the unit When the switch opens and then closes there will be a 5 minute short cycling delay before the outdoor unit will energize Charging the Unit in AC mode at outdoor tempera tures above 55 F for optimized sub cooling of 10 F 12 F 1 Wi
19. n Ajddns 104 Z JOOUUODSIG L SALON 4J0 0W WOA uds ith CoreSense 5 Models w ioner ir Cond le Phase A ing 5 7 igure F 12 ALERT CODE Normal Run Solid Yellow ALERT CONDITION Normal operation no trip LOCK LEVEL LOCK INDICATION Code1 Yellow Flash 1 Long run time Compressor is on running for more than 18 hours Code1 is disabled in Heat Pump Mode N A N A Code2 Yellow Flash 2 Compressor pressure trip Compressor runs for 12 sec to 15 min followed by a compressor trip condition lasting for more than 7 min 4x consecutive Red Flash2 Yellow Off Code3 Yellow Flash 3 Pressure switch cycling Compressor runs for 12 sec to 15 min followed by compressor trip lasting between 35 sec to 7 min 4x consecutive or 10x total Red Flash3 Yellow Off Code4 Yellow Flash 4 Locked rotor Compressor trips within a compressor run time of 12 sec and does not start within 35 sec 10x consecutive Red Flash4 Yellow Off Code5 Yellow Flash 5 Compressor moderate run trip Compressor runs for 15 min to 18 hrs followed by a compressor trip lasting longer than 7 min 4x consecutive or 10x total Red Flash5 Yellow Off Code9 Red Flash 9 The current to
20. nal injury or death The installer must comply with all local codes and regulations which govern the installation of this type of equipment Local codes and regulations take precedence over any recommendations contained in these instructions Consult local building codes and the National Electrical Code ANSI Cl for special installation requirements All electrical wiring must be completed in accordance with local state and national codes and regulations and with the National Electric Code ANSI NFPA 70 or in Canada the Canadian Electric Code Part 1 CSA C 22 1 This equipment contains liquid and gaseous refrigerant under high pressure DO NOT USE ANY PORTION OF THE CHARGE FOR PURGING OR LEAK TESTING Installation or servicing should only be performed by qualified trained personnel thoroughly familiar with this type equipment Fully annealed refrigerant grade copper tubing should be used when installing the system Refrigerant suction line tubing should be fully insulated Installation of equipment may require brazing operations Installer must comply with safety codes and wear appropriate safety equipment safety glasses work gloves fire extinguisher etc when performing brazing operations Follow all precautions in the literature on tags and on labels provided with the equipment Read and thoroughly understand the instructions provided with the equipment prior to performing the installation and operational checkout of the
21. ndoor blower and verify that it is warmer than ambient temperature Listen for any unusual noises If unusual sounds occur determine the source of the noise and correct as necessary AIR CONDITIONER MAINTENANCE A WARNING To prevent electrical shock personal injury or death disconnect all electrical power to the unit before performing any maintenance or service The unit may have more than one electrical Refrigerant charging charts are applicable only to matched assemblies of NORDYNE equipmentand listed airflows for the indoor coil Refer to Figure 3 page 8 for correct system charging S4BE outdoor units with non AHRI listed indoor coils are notrecommended Deviations from rated airflows or non listed combinations may require modification to the expansion device and refrigerant charging procedures for proper and efficient system operation supply Proper maintenance is important to achieve optimum performance from the air conditioner The ability to properly perform maintenance on this equipment requires certain mechanical skills and tools If you do not possess these skills contact your dealer for maintenance Consult your local dealer aboutthe availability of maintenance contracts Routine maintenance should include the following e Inspect and clean or replace air filters at the beginning of each heating and cooling season or more frequently if required Inspect the condensate drain and outdoor coil a
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23. nnecting refrigerant linesets together it is recommended that dry nitrogen be flowing through the joints during brazing to prevent internal oxidation and scaling Refrigerant tubing should be routed in a manner that minimizes the length of tubing and the number of bends in the tubing If precise forming of refrigerant lines is required a copper tubing bender is recommended Avoid sharp bends and contact of the refrigerant lines with metal surfaces Refrigerant tubing should be supported in a manner that the tubing will not vibrate or abrade during system operation Tubing should be kept clean of foreign debris during installation Every effort should be made by the installer to ensure thatthe field installed refrigerant containing components of the system have been installed in accordance with these instructions and sound installation practices to insure reliable system operation and longevity The maximum recommended interconnecting refrigerant line lengths is 75 ft and the vertical elevation difference between the indoor and outdoor sections should not exceed 20 ft A filter dryer is provided with the unit and must be installed in the liquid line of the system If the installation replaces a system with a filter dryer already present in the liquid line the filter dryer must be replaced with the one supplied with the unit The filter dryer must be installed in strict accordance with the manufacturer s installation instructions Opt
24. ostics module has detected a series of adverse conditions that have caused it to lockout the compressor and after the issue has been resolved it is necessary to manually reset the module in order to clear the present alert code The primary way of clearing the code and resetting the alert is to press the reset button located on the module NOTE Pressing the reset will require a pin or a mini electronics screwdriver This button must be pressed and held for a minimum of one second for the module to be reset Pressing the reset button clears the immediate lock code and the seven day operating history It will not clear the permanent module history In the case of the three wire module the codes can be reset or cleared by cycling power to the module This can be done by disengaging the Common C terminal This will not clear the seven day operating history Thermostat Connections e Thermostat connections should be made in accordance with the instructions supplied with the thermostat and the indoor equipment The outdoor unit is designed to operate from a 24 VAC Class 11 control circuit The control circuit wiring must comply with the current provisions of the NEC ANSI NFPA 70 and with applicable local codes having jurisdiction The low voltage wires must be properly connected to the units low voltage terminal block Recommended wire gauge and wire lengths for typical thermostat connections are listed in Table 2 The thermostat
25. rately troubleshoot system and compressor fault conditions A flashing LED indicator communicates the ALERT code and a diagnostic key is also imprinted on the side of the module to quickly direct the technician to the root cause of a problem Alert identification codes are also listed in Table 3 page 13 Compressor Protection The CoreSense Diagnostics module utilizes proprietary algorithms to protect the compressor and system from repeated trips of system pressure controls and the compressor internal overload The protection terminal of the module should be wired in series with the system low pressure and high pressure cutouts as well as the compressor contactor When the module detects a series of trips as described below it will activate a lockout feature that opens the normally closed protection contacts in COPPER WIRE SIZE AWG 1 Voltage Drop Supply Wire Length Feet Supply Circuit Ampacity 150 100 gt 5 m Wire Size based on N E C for 60 type copper conductors Table 1 Copper Wire Size Compressor Common Wire Reset Button Run Alert Yellow LED Trip Lock Red LED Figure 2 CoreSense Diagnostics Module the module thereby cutting power to the contactor and shutting off the compressor Resetting Alert Codes Whenthe CoreSense Diagn
26. should be mounted about 5 feet above the floor on an inside wall DO NOT install the thermostat on an outside wall or any other location where its operation may be adversely affected by radiantheat fireplaces sunlight or lighting fixtures and convective heat from warm air registers or electrical appliances Refer to the thermostat manufacturer s instruction sheet for detailed mounting and installation information Recommended T Stat Wire Unit to T Stat Length in FT Heating Heating Cooling Table 2 Thermostat Wire Gauge Thermostat Wire Gauge 2 START UP amp ADJUSTMENTS Pre Start Check List Verify the indoor unit is level and allows proper condensate drainage Verify the outdoor coil and top of the unit are free from obstructions and debris and all equipment access control panels are in place y Verify air filters are cleaned and properly installed Verify duct work is sealed to prevent air leakage Verify line voltage power leads are securely connected and the unit is properly grounded Verify low voltage wires are securely connected to the correct leads on the low voltage terminal strip Verify power supply branch circuit overcurrent protection is sized properly Verify the thermostat is wired correctly Start Up Procedures The thermostat s function mode should be set to OFF and the fan mode should be set to AUTO Close all electrical disconnects to energize the system
27. t the beginning of each cooling season Remove any debris Clean the outdoor coil and louvers as necessary using amild detergent and water Rinse thoroughly with water Inspect the electrical connections for tightness at the The refrigerant charge can be checked and adjusted through the service ports provided external to the outdoor unit Use only gage line sets which have a Schrader depression device present to actuate the valve A high pressure switch is factory installed and located in the liquid line internal to the outdoor unit The switch is designed to protect the system when very high pressures occur during abnormal conditions Under normal conditions the switch is closed If the liquid pressure rises above 575 psig then the switch will open and de energize the outdoor unit The switch will close again once the liquid pressure decreases to 460 psig Please note that the switch interrupts the thermostat inputs to the unit Thus when the switch opens and then closes there may be a 5 minute short cycling delay before the outdoor unit will energize A low pressure switch select models only is factory beginning of each heating and cooling season Service as necessary Ax CAUTION The unit should never be operated without a filter in the return air system Replace disposable filters with the same type and size Donotattemptto add additional oil to motors unequipped with oil tubes The compressor is hermetical
28. th the system operating at steady state measure the liquid refrigerant pressure in psig at the outdoor unit service valve 2 Measure the liquid refrigerant temperature in Fahren heit at the service valve 3 Determine the required liquid refrigerant pressure from the charging chart Figure 3 page 8 e f the pressure measured in Step 1 is greater than the required liquid refrigerant pressure determined in Step 3 then there is too much charge in the system Remove refrigerant and repeat Steps 1 through 3 until the system is correctly charged If the pressure measured in Step 1 is less than the required liquid refrigerant pressure determined in Step 3 there is too little charge in the system Add refrigerant and repeat Steps 1 through 3 until the system is correctly charged Application Notes for Using the Charging Chart This equipment s cooling system contains refrigerant under high pressure Always use safe and environmentally sound methods when handling refrigerant handling or servicing the unit Review the factory literature and safety warnings prior to servicing When repairing system leaks always use a nitrogen inert gas to protect the refrigerant system and pressure check the repair before re charging Always replace the filter dryers when performing any repair to the refrigeration system with one capable of acid removal After completing the repairs evacuate the system to 350 500 microns and weigh in the refr
29. y or property damage A WARNING Shut off all electrical power to the unit before performing any maintenance or service on the system Failure to comply may resultin personal injury or death A WARNING Unless noted otherwise in these instructions only factory authorized parts or accessory kits may be used with this product Improper installation service adjustment or maintenance may cause explosion fire electrical shock or other hazardous conditions which may result in personal injury or property damage A WARNING S4BE Split System Air Conditioners are shipped charged with R410A refrigerant and ready for installation If repairs make it necessary for evacuation and charging it should only be attempted by qualified trained personnel thoroughly familiar with this equipment Under no circumstances should the owner attempt to install and or service this equipment Failure to comply with this warning could resultin property damage personal injury or death A CAUTION This unit uses refrigerant R 410A DO NOT use any other refrigerant in this unit Use of another refrigerant will damage the unit A WARNING The information listed below must be followed during the installation service and operation of this unit Unqualified individuals should not attempt to interpret these instructions or install this equipment Failure to follow safety recommendations could result in possible damage to the equipment serious perso
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