Installation Instructions
Contents
1. CONDENSING UNIT AIR CONDITIONING INSTALLATION amp SERVICE REFERENCE Important Safety Instructions The following symbols and labels are used throughout this manual to indicate immediate or potential safety hazards It isthe owner s and installer s responsibility to read and comply with all safety information and instructions accompanying these symbols Fail ure to heed safety information increases the risk of personal in jury property damage and or product damage A WARNING HIGH VOLTAGE Disconnect ALL power before servicing Multiple power sources may be present Failure to do so may cause property damage personal injury or death WARNING ONLY individuals meeting the requirements at a minimum of an Entry Level Technician as specified by the Air Conditioning Heating and Refrigeration Institute AHRI may use this information Attempting to install or repair this unit without such background may result in product damage personal injury or death Shipping Inspection Always keep the unit upright laying the unit on its side or top may cause equipment damage Shipping damage and subsequent in vestigation is the responsibility of the carrier Verify the model number specifications electrical characteristics and accesso ries are correct prior to installation The distributor or manufac turer will not accept claims from dealers for transportation dam age or installation of incorrectly shi2. e Never purge refrigerant into an enclosed room or space By law all refrigerants must be reclaimed e If an indoor leak is suspected thoroughly ventilate the area before beginning work e Liquid refrigerant can be very cold To avoid possible frostbite or blindness avoid contact and wear gloves and goggles If liquid refrigerant does contact your skin or eyes seek medical help immediately e Always follow EPA regulations Never burn refrigerant as poisonous gas will be produced AQ WARNING To avoid possible explosion Never apply flame or steam to a refrigerant cylinder If you must heat a cylinder for faster charging partially immerse it in warm water Never fill a cylinder more than 80 full of liquid refrigerant Never add anything other than R 22 to an R 22 cylinder or R 410A to an R 410A cylinder The service equipment used must be listed or certified for the type of refrigerant used Store cylinders in a cool dry place Never use a cylinder as a platform or a roller A WARNING To avoid possible explosion use only returnable not disposable service cylinders when removing refrigerant from a system e Ensure the cylinder is free of damage which could lead to a leak or explosion e Ensure the hydrostatic test date does not exceed 5 years e Ensure the pressure rating meets or exceeds 400 Ibs When in doubt do not use cylinder Refrigerant Lines AX CAUTION The compressor POE oil for R 410A units is e
3. circuit breakers or failed fuses Reset the circuit breakers or replace fuses as necessary Check the disconnect switch near the indoor furnace or blower to confirm that it is closed Check for obstructions on the outdoor unit Confirm that it has not been covered on the sides or the top Remove any obstruction that can be safely removed If the unit is cov ered with dirt or debris call a qualified servicer to clean it Check for blockage of the indoor air inlets and outlets Confirm that they are open and have not been blocked by objects rugs curtains or furniture Check the filter If it is dirty clean or replace it Listen for any unusual noise s other than normal operat ing noise that might be coming from the outdoor unit If you hear unusual noise s coming from the unit call a quali fied servicer
4. refrigerant to meet AHRI standards NOTICE Violation of EPA regulations may result in fines or other penalties AA CAUTION Operating the compressor with the suction valve closed will void the warranty and cause serious compressor damage Final Charge Adjustment The outdoor temperature must be 60 F or higher Set the room thermostat to COOL fan switch to AUTO and set the temperature control well below room temperature After system has stabilized per startup instructions check subcooling and superheat as detailed in the following section Fixed Orifice d CAUTION To prevent personal injury carefully connect and disconnect manifold gauge hoses Escaping liquid refrigerant can cause burns Do not vent refrigerant into the atmosphere Recover all refrigerant during system repair and before final unit disposal 1 Purge gauge lines Connect service gauge manifold to base valve service ports Run system at least 10 minutes to allow pressure to stabilize 2 Temporarily install a thermometer 4 6 from the compres sor on the suction line Ensure the thermometer makes ad equate contact and is insulated for best possible readings Use vapor temperature to determine superheat 3 Refer to the superheat table provided for proper system su perheat Add charge to lower superheat or recover charge to raise superheat 4 Disconnect manifold set installation is complete Superheat Formula Suct Line Temp Sat Su
5. refrigerant types ensure the indoor coil and metering device is compatible with the type of refrigerant being used otherwise the indoor coil must be replaced Burying Refrigerant Lines If burying refrigerant lines can not be avoided use the following checklist 1 Insulate liquid and suction lines separately 2 Enclose all underground portions of the refrigerant lines in waterproof material conduit or pipe sealing the ends where tubing enters exits the enclosure 3 If the lines must pass under or through a concrete slab ensure lines are adequately protected and sealed Refrigerant Line Connections IMPORTANT To avoid overheating the service valve TXV valve or filter drier while brazing wrap the component with a wet rag or use a thermal heat trap compound Be sure to follow the manufacturer s instruction when using the heat trap compound Note Remove Schrader valves from service valves before brazing tubes to the valves Use a brazing alloy of 2 minimum silver content Do not use flux Torch heat required to braze tubes of various sizes is proportional to the size of the tube Tubes of smaller size require less heat to bring the tube to brazing temperature before adding brazing alloy Applying too much heat to any tube can melt the tube Service personnel must use the appropriate heat level for the size of the tube being brazed Note The use of a heat shield when brazing is recommended to avoid burning the serial plat
6. ate the system to 250 microns or less using suction and liquid service valves Using both valves is necessary as some compressors create a mechanical seal separating the sides of the system 3 Close pump valve and hold vacuum for 10 minutes Typi cally pressure will rise during this period e If the pressure rises to 1000 microns or less and remains steady the system is considered leak free proceed to startup 5000 4500 4000 LEAK S PRESENT 3500 3000 2500 2000 CONDENSIBLES OR SMALL 2 LEAK PRESENT VACUUM IN MICRONS 1000 NO LEAKS ki NO CONDENSIBLES 0 1 2 3 4 5 6 7 8 9 10 MINUTES e If pressure rises above 1000 microns but holds steady be low 2000 microns moisture and or noncondensibles may be present or the system may have a small leak Return to step 2 If the same result is encountered check for leaks as previously indicated and repair as necessary then repeat evacuation e If pressure rises above 2000 microns a leak is present Check for leaks as previously indicated and repair as necessary then repeat evacuation Electrical Connections AA WARNING Multiple power sources may be present Failure to do sO may cause property damage personal injury or death due to electric shock Wiring must conform with NEC or CEC and all local codes Undersized wires could cause poor equipment performance equipment damage or fire HIGH VOLTAGE Disconnect ALL power before s
7. ct Temp SYSTEM SUPERHEAT Outdoor Dry Bulb Indoor Wet Bulb Temperature F Temperature F SUPERHEAT FORM ULA SUCT LINETEM P SAT SUCT TEM P SATURATED SUCTION PRESSURE SATURATED LIQUID PRESSURE TEMPERATURE CHART TEMPERATURE CHART SATURATED SUCTION SATURATED LIQUID SUCTION PRESSURE TEMPERATURE F LIQUID PRESSURE TEMPERATURE 2k Je e ram j asc RO raoa 26 200 101 NOTE SPEGACATIONS AND PERFORMANCE DATA LISTED HEREIN ARE SUBJ ECT TO CHANGE WITHOUT NOTICE Expansion Valve System b If subcooling is low and superheat is high add charge to raise subcooling to 7 to 9 F then check superheat c Ifsubcooling and superheat are high adjust TXV valve to 7 to 9 F superheat then check subcooling d If subcooling is high and superheat is low adjust TXV valve to 7 to 9 F superheat and remove charge to lower the subcooling to 7 to 9 F NOTE Units matched with indoor coils equipped with non adjust able TXV should be charged by subcooling only 1 Purge gauge lines Connect service gauge manifold to base valve service ports Run system at least 10 minutes to allow pressure to stabilize 2 Temporarily install a thermometer on the liquid line at the liquid line service valve and 4 6 from the compressor on the suction line Ensure the thermometer makes adequate contact and is insulated for best possible readings Use liq 4 Disconnect manifold set installation is complete uid line temperature to
8. determine sub cooling and vapor Subcooling Formula Sat Liquid Temp Liquid Line Temp temperature to determine superheat 3 Check subcooling and superheat Systems with TXV applica tion should have a subcooling of 7 to 9 F and superheat of 7 to 9 F a If subcooling and superheat are low adjust TXV to 7 to 9 F superheat then check subcooling NOTE To adjust superheat turn the valve stem clock wise to increase and counter clockwise to decrease NOTE Do NOT adjust the charge based on suction pressure unless there is a gross undercharge NOTE Check the Schrader ports for leaks and tighten valve cores if necessary Install caps finger tight Troubleshooting Information COOLING ANALYSIS CHART System Operating Pressures Complaint No Cooling Unsatisfactory Cooling POSSIBLE CAUSE Test Method DOTS IN ANALYSIS Remedy GUIDE INDICATE POSSIBLE CAUSE SYMPTOM Compressor will not start fan runs Compressor and Condenser Fan will not start Evaporator fan will not start Condenser fan will not start Compressor runs goes off on overload Compressor cycles on overload System runs continuously little cooling Too cool and then too warm Not cool enough on warm days Certain areas to cool others to warm Low suction pressure Low head pressure High suction pressure High head pressure System will not start Compressor is noisy Test Voltage Impact Fuse Size amp Type Inspect Connection Tighte
9. e or the finish on the unit 1 The ends of the refrigerant lines must be cut square de burred cleaned and be round and free from nicks or dents Any other condition increases the chance of a refrigerant leak 2 Sweep the refrigerant line with nitrogen or inert gas dur ing brazing to prevent the formation of copper oxide inside the refrigerant lines The POE oils used in R 410A applica tions will clean any copper oxide present from the inside of the refrigerant lines and spread it throughout the system This may cause a blockage or failure of the metering device 3 After brazing quench the joints with water or a wet cloth to prevent overheating of the service valve 4 Ensure the filter drier paint finish is intact after brazing If the paint of the steel filter drier has been burned or chipped repaint or treat with a rust preventative This is especially important on suction line filter driers which are continually wet when the unit is operating NOTE Be careful not to kink or dent refrigerant lines Kinked or dented lines will cause poor performance or compressor damage Do NOT make final refrigerant line connection until plugs are removed from refrigerant tubing NOTE Before brazing verify indoor piston size by checking the piston kit chart packaged with indoor unit Leak Testing Nitrogen or Nitrogen Traced AA WARNING To avoid the risk of fire or explosion never use oxygen high pressure air or flammable ga
10. equipment damage Your air filter or filters could be located in your furnace in a blower unit or in filter grilles in your ceiling or walls The in staller of your air conditioner or heat pump can tell you where your filter s are and how to clean or replace them Check your filter s at least once a month When they are dirty replace or clean as required Disposable type filters should be replaced Reusable type filters may be cleaned You may want to ask your dealer about high efficiency filters High efficiency filters are available in both electronic and non elec tronic types These filters can do a better job of catching small airborne particles COMPRESSOR The compressor motor is hermetically sealed and does not re quire additional oiling Motors Indoor and outdoor fan motors are permanently lubricated and do not require additional oiling CLEAN OUTSIDE Coit QUALIFIED SERVICER ONLY A WARNING HIGH VOLTAGE Disconnect ALL power before servicing Multiple power sources may be present Failure to do so may cause property damage personal injury or death Air must be able to flow through the outdoor unit of your comfort system Do not construct a fence near the unit or build a deck or patio over the unit without first discussing your plans with your dealer or other qualified servicer Restricted airflow could lead to poor operation and or severe equipment damage Likewise it is important to keep the outdoo
11. ervicing N A WARNING To avoid the risk of fire or equipment damage use copper conductors NOTICE Units with reciprocating compressors and non bleed TXV s require a Hard Start Kit The condensing unit rating plate lists pertinent electrical data necessary for proper electrical service and overcurrent protec tion Wires should be sized to limit voltage drop to 2 max from the main breaker or fuse panel to the condensing unit Con sult the NEC CEC and all local codes to determine the correct wire gauge and length Local codes often require a disconnect switch located near the unit do not install the switch on the unit Refer to the installation instructions supplied with the indoor furnace air handler for spe cific wiring connections and indoor unit configuration Likewise consult the instructions packaged with the thermostat for mounting and location information Overcurrent Protection The following overcurrent protection devices are approved for use e Time delay fuses HACR type circuit breakers These devices have sufficient time delay to permit the motor com pressor to start and accelerate its load Three Phase Compressor Rotation AA CAUTION Use care when handling scroll compressors Dome temperatures could be hot Three phase compressors are power phase dependent and can rotate in either direction Verify proper rotation for three phase compressors by ensuring the suction pressure d
12. f refrigerant DO NOT apply pressure to the retainer When opening valves without a retainer remove service valve cap and insert a hex wrench into the valve stem and back out the stem by turning the hex wrench counterclockwise Open the valve until it contacts the rolled lip of the valve body NOTE These are not back seating valves It is not necessary to force the stem tightly against the rolled lip NOTE Power must be supplied to the 18 SEER outdoor units containing ECM motors before the power is applied to the indoor unit Sending alow voltage signal without high voltage power present at the outdoor unit can cause malfunction of the control module on the ECM motor Adequate refrigerant charge for the matching HSVTC evaporator coil and 15 feet of lineset is supplied with the condensing unit If using evaporator coils other than HSVTC coil it may be necessary to add or remove refrigerant to attain proper charge If line set exceeds 15 feet in length refrigerant should be added at 6 ounces per foot of liquid line NOTE Charge should always be checked using superheat when using a piston and subcooling when using TXV equipped indoor coil to verify proper charge Open the suction service valve first If the liquid service valve is opened first oil from the compressor may be drawn into the indoor coil TXV restricting refrigerant flow and affecting opera tion of the system After the refrigerant charge has bled into the system open
13. n Test Circuits with Ohmmeter Test Continuity of Overloads Test Continuity of Thermostat and Wiring Check Control Circuit with Voltmeter Test Capacitor Test Continuity of Overload Test Motor Windings Use Test Cord Test Continuity of Coil and Contacts Test Control Circuit with Voltmeter Test Voltage Repair or Replace Test Motor Windings Check Resistance of Anticipator Test For Leaks Add Refrigerant Replace Restricted Part Replace Line Replace Line Speed Blower Check Duct Static Pressure Reduce Blower Speed Recover Part of Charge Recover Charge Evacuate Recharge Remove Obstruction to Air Flow Check Windows Doors Vent Fans Etc Relocate Thermostat Readjust Air Volume Dampers Refigure Cooling Load Replace Compressor Test Compressor Efficiency Test Compressor Efficiency Reset and Test Control Test Voltage Replace Valve Replace Valve Replace Valve Replace Valve Loose Connection Shorted or Broken Wires Internal Compressor Overload Open Shorted or Grounded Compressor Compressor Stuck Faulty Compressor Contactor Open Control Circuit Low Voltage Faulty Evaporator Fan Motor Shorted or Grounded Fan Motor Improper Cooling Anticipator Shortage or Refrigerant Restricted Liquid Line Undersized Liquid Line Undersized Suction Line Not Enough Air across Indoor Coil Too Much Air across Indoor Coil Overcharge of Refrigerant Noncondensibles Recirculation of Conden
14. n stallations are strongly discouraged X NOT RECOMMENDED Minimum Airflow Clearance moame a s e m This unit can be located at ground floor level or on flat roofs At ground floor level the unit must be on a solid level foundation that will not shift or settle To reduce the possibility of sound transmission the foundation slab should not be in contact with or be an integral part of the building foundation Ensure the foun dation is sufficient to support the unit A concrete slab raised above ground level provides a suitable base Rooftop Installations If it is necessary to install this unit on a roof structure ensure the roof structure can support the weight and that proper consider ation is given to the weather tight integrity of the roof Since the unit can vibrate during operation sound vibration transmission should be considered when installing the unit Vibration absorb ing pads or springs can be installed between the condensing unit legs or frame and the roof mounting assembly to reduce noise vibration AA WARNING To avoid possible injury explosion or death practice safe handling of refrigerants Safe Refrigerant Handling While these items will not cover every conceivable situation they should serve as a useful guide A WARNING Refrigerants are heavier than air They can push out the oxygen in your lungs or in any enclosed space To avoid possible difficulty in breathing or death
15. n of substantial fines Should you have any questions please contact the local office of the EPA Ifreplacing a condensing unit or air handler the system must be manufacturer approved and Air Conditioning Heating and Refrig eration Institute AHRI matched NOTE Installation ofunmatched systems is strongly discouraged Outdoor units are approved for operation above 55 F in cooling mode Operation below 55 F requires the use of an approved low ambient kit Operating the unit in a structure that is not complete either as part of new construction or renovation will void the warranty Installation Clearances Special consideration must be given to location of the condensing unit s in regard to structures obstructions other units and any all other factors that may interfere with air circulation Where possible the top of the unit should be completely unobstructed however if vertical conditions require placement beneath an ob struction there should be a minimum of 60 inches between the top of the unit and the obstruction s The specified dimensions meet requirements for air circulation only Consult all appropri ate regulatory codes prior to determining final clearances Another important consideration in selecting a location for the unit s isthe angle to obstructions Either side adjacent the valves can be placed toward the structure provided the side away from the structure maintains minimum service clearance Corner i
16. our dis tributor for assistance RECOMMENDED INTERCONNECTING TUBING Ft 324 A Line Diameter In OD Lines greater than 79 feet in length or vertical elevation changes more than 50 feet refer to the Remote Cooling Service Manual or contact your distributor for assistance Liquid Line E Suction Line Mounting the evaporator coil above the condensing unit will require an inverted loop in the suction line adjacent or near the connection to the evaporator The top of the loop must be slightly higher than the top of the coil Mounting the condensing unit above the evaporator coil will not require an oil trap in the suction line at the evaporator except when the condensing unit is over 80 feet above the evaporator m TI Refer to the latest revision of long line set guidelines TP 107 Insulation is necessary to prevent condensation from forming and dropping from the suction line Armflex or satisfactory equivalent with 3 8 min wall thickness is recommended In severe conditions hot high humidity areas 1 2 insulation may be required Insulation must be installed in a manner which protects tubing from damage and contamination Where possible drain as much residual compressor oil from ex isting systems lines and traps pay close attention to low areas where oil may collect NOTE If changing
17. pped units Our continuing commitment to quality products may mean a change in specifications without notice 2013 DAIKIN MANUFACTURING COMPANY L P 5151 San Felipe St Suite 500 Houston TX 77056 www daikincomfort com IOD 4001A 9 2013 a INSTALLATION INSTRUCTIONS s Codes 8 Regulations This product is designed and manufactured to comply with na tional codes Installation in accordance with such codes and or prevailing local codes regulations is the responsibility of the in staller The manufacturer assumes no responsibility for equip ment installed in violation of any codes or regulations Rated performance is achieved after 72 hours of operation Rated per formance is delivered at the specified airflow See outdoor unit specification sheet for split system models or product specifica tion sheet for packaged and light commercial models Specifica tion sheets can be found at www daikincomfort com for Daikin Within the website please select the residential or commercial products menu and then select the submenu for the type of prod uct to be installed such as air conditioners or heat pumps to access a list of product pages that each contain links to that model s specification sheet The United States Environmental Protection Agency EPA has is sued various regulations regarding the introduction and disposal ofrefrigerants Failure to follow these regulations may harm the environment and can lead to the impositio
18. r coil clean Dirt leaves or debris could also restrict the airflow If cleaning of the outdoor coil becomes necessary hire a qualified servicer Inexperienced people could easily puncture the tubing in the coil Even a small hole in the tubing could eventually cause a large loss of refriger ant Loss of refrigerant can cause poor operation and or severe equipment damage Do not use a condensing unit cover to protect the outdoor unit during the winter unless you first discuss it with your dealer Any cover used must include breathable fabric to avoid moisture buildup uly BEFORE CALLING YOUR SERVICER Check the thermostat to confirm that it is properly set Wait 15 minutes Some devices in the outdoor unit or in programmable thermostats will prevent compressor op eration for awhile and then reset automatically Also some power companies will install devices which shut off air conditioners for several minutes on hot days If you wait several minutes the unit may begin operation on its own AX CAUTION TO AVOID THE RISK OF EQUIPMENT DAMAGE OR FIRE INSTALL THE SAME AMPERAGE BREAKER OR FUSE AS YOU ARE REPLACING IF THE CIRCUIT BREAKER OR FUSE SHOULD OPEN AGAIN WITHIN THIRTY DAYS CONTACT A QUALIFIED SERVICER TO CORRECT THE PROBLEM IF YOU REPEATEDLY RESET THE BREAKER OR REPLACE THE FUSE WITHOUT HAVING THE PROBLEM CORRECTED YOU RUN THE RISK OF SEVERE EQUIPMENT DAMAGE 12 Check the electrical panel for tripped
19. rops and discharge pressure rises when the compressor is energized NOTE When operated in reverse a three phase scroll compressors is noisier and its current draw sub stantially reduced compared to marked values To correct disconnect power and switch any two leads at the unit contactor and re observe High Voltage Connections Route power supply and ground wires through the high voltage port and terminate in accordance with the wiring diagram pro vided inside the control panel cover Low Voltage Connections Condensing unit control wiring requires 24 Volt minimum 25VA service from the indoor transformer Low voltage wiring for two stage units depends on the thermostat used and the number of control wires between the indoor unit and the condensing unit Route control wires through the low voltage port and terminate in accordance with the wiring diagram provided inside the control panel cover 0 OOO OO BOOM OG gt REMOTE THERM OSTAT SINGLE STAGE HEATING WITH SINGLE STAGE COOLING FURNACE OR AIR HANDLER Single Stage Thermostat with Two Low Voltage Wires to Remote System Start Up AY CAUTION POSSIBLE REFRIGERANT LEAK To avoid a possible refrigerant leak open the service valves until the top of the stem is 1 8 from the retainer When opening valves with retainers open each valve only until the top of the stem is 1 8 from the retainer To avoid loss o
20. ses for leak testing of a refrigeration system AQ WARNING To avoid possible explosion the line from the nitrogen cylinder must include a pressure regulator and a pressure relief valve The pressure relief valve must be set to open at no more than 150 psig Pressure test the system using dry nitrogen and soapy water to locate leaks If you wish to use a leak detector charge the system to 10 psi using the appropriate refrigerant then use nitrogen to finish charging the system to working pressure then apply the detector to suspect areas If leaks are found repair them After repair repeat the pressure test If no leaks exist proceed to sys tem evacuation System Evacuation Condensing unit liquid and suction valves are closed to contain the charge within the unit The unit is shipped with the valve stems closed and caps installed Do not open valves until the system is evacuated AQ WARNING REFRIGERANT UNDER PRESSURE Failure to follow proper procedures may cause property damage personal injury or death NOTE Scroll compressors should never be used to evacuate or pump down a heat pump or air conditioning system AQ CAUTION Prolonged operation at suction pressures less than 20 psig for more than 5 seconds will result in overheating of the scrolls and permanent damage to the scroll tips drive bearings and internal seal 1 Connect the vacuum pump with 250 micron capability to the service valves 2 Evacu
21. sing Air Infiltration of Outdoor Air Improperly Located Thermostat Air Flow Unbalanced System Undersized Broken Internal Parts Broken Valves Inefficient Compressor High Pressure Control Open Unbalanced Power 3PH Wrong Type Expansion Valve Expansion Valve Restricted Oversized Expansion Valve Undersized Expansion Valve Expansion Valve Bulb Loose Tighten Bulb Bracket Inoperative Expansion Valve Check Valve Operation Loose Hold down Bolts Tighten Bolts For detailed service information refer to Remote Condensing Unit service manual NOTICE Units with rotary or reciprocating compressors and non bleed TXV s require a Hard Start Kit THIS PAGE LEFT INTENTIONALLY BLANK 11 SPLIT SYSTEMS AIR CONDITIONING AND HEAT PUMP HOMEOWNER S ROUTINE MAINTENANCE RECOMMENDATIONS We strongly recommend a bi annual maintenance checkup be performed before the heating and cooling seasons begin by a qualified servicer REPLACE OR CLEAN FILTER IMPORTANT NOTE Never operate unit without a filter installed as dust and lint will build up on internal parts resulting in loss of efficiency equipment damage and possible fire An indoor air filter must be used with your comfort system A properly maintained filter will keep the indoor coil of your com fort system clean A dirty coil could cause poor operation and or severe
22. the liquid service valve The service valve cap is the secondary seal for the valves and must be properly tightened to prevent leaks Make sure cap is clean and apply refrigerant oil to threads and sealing surface on inside of cap Tighten cap finger tight and then tighten additional 1 6 of a turn 1 wrench flat or to the following specification to properly seat the sealing surfaces 1 3 8 valve to 5 10 in lbs 2 5 8 valve to 5 20 in lbs 3 3 4 valve to 5 20 in lbs 4 7 8 valve to 5 20 in lbs Do not introduce liquid refrigerant from the cylinder into the crankcase of the compressor as this may damage the compressor d CAUTION POSSIBLE REFRIGERANT LEAK To avoid a possible refrigerant leak open the service valves until the top of the stem is 1 8 from the retainer 1 Break vacuum by fully opening liquid and suction base valves 2 Set thermostat to call for cooling Check indoor and outdoor fan operation and allow system to stabilize for 10 minutes for fixed orifices and 20 minutes for expansion valves Charge Verification A WARNING REFRIGERANT UNDER PRESSURE e Do not overcharge system with refrigerant e Do not operate unit in a vacuum or at negative pressure Failure to follow proper procedures may cause property damage personal injury or death d CAUTION Use refrigerant certified to AHRI standards Used refrigerant may cause compressor damage Most portable machines cannot clean used
23. xtremely susceptible to moisture absorption and could cause compressor failure Do not leave system open to atmosphere any longer than necessary for installation Use only refrigerant grade dehydrated and sealed copper tubing to connect the condensing unit with the indoor evaporator After cutting the tubing install plugs to keep refrigerant tubing clean and dry prior to and during installation Tubing should always be cut square keeping ends round and free from burrs Clean the tubing to prevent contamination Do NOT let refrigerant lines come in direct contact with plumbing ductwork floor joists wall studs floors and walls When run ning refrigerant lines through a foundation or wall openings should allow for sound and vibration absorbing material to be placed or installed between tubing and foundation Any gap be tween foundation or wall and refrigerant lines should be filled with a pliable silicon based caulk RTV or a vibration damping material Avoid suspending refrigerant tubing from joists and studs with rigid wire or straps that would come in contact with the tubing Use an insulated or suspension type hanger Keep both lines separate and always insulate the suction line These sizes are recommended for line lengths of 79 feet or less to obtain optimum performance For alternate line sizing options or runs of more than 79 feet refer to Remote Cooling Service M anual or TP 107 Long Line Set Application R 410A or contact y
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