SSZ140421 Series - HvacPartsShop.com
Contents
1. a fj olojo w Fixed Orifice b lf subcooling is low and superheat is high add charge to rai bcooling to 7 to 9 F then check super 1 Temporarily install a thermometer 4 6 from the compres Se a heat sor on the suction line Ensure the thermometer makes adequate contact and is insulated for best possible read c lf subcooling anid superheat are high adjust TXV ings Use vapor temperature to determine superheat 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 2 Refer to the superheat table provided for proper system superheat Add charge to lower superheat or recover charge to raise superheat Expansion Valve System NOTE Do NOT adjust the charge based on suction pressure less there is a gross undercharge NOTE Units matched with indoor coils equipped with non 9 9 adlustanle TAV SNOUT GACHAS DY any NOTE Check the Schrader ports for leaks and tighten valve 1 Temporarily install a thermometer on the liquid line atthe cores if necessary Install caps finger tight liquid line service valve and 4 6 from the compressor on the suction line Ensure the thermometer makes adequate Heat Pump Heating Cycle contact and is insulated for best possible readings Use2. i 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 LS is over 80 feet above the evaporator Refer to the latest revision of long line set guidelines TP 107 of 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 existing systems lines and traps pay close attention to low areas where oil may collect NOTE If changing refrigerant types ensure the indoor coil and metering device is compat ible with the type of refrigerant being used oth
3. liquid line temperature to determine sub cooling and va The proper method of charging a heat pump in the heat mode por temperature to determine superheat is by weight with the additional charge adjustments for line size line length and other system components For best results on outdoor units with TXVs superheat should be 2 5 at 4 6 from the compressor Make final charge adjustments in the cooling cycle 2 Check subcooling and superheat Systems with TXV ap plication should have a subcooling of 7 to 9 F and super heat of 7 to 9 F a lf subcooling and superheat are low adjust TXV to 7 to 9 F superheat then check subcooling NOTE To adjust superheat turn the valve stem clockwise to increase and counter clockwise to de crease Troubleshooting Information System Complaint No Cooling Unsatisfactory Cooling Heat ing Operating Pressures POSSIBLE CAUSE Test Method Remedy DOTS IN ANALYSIS GUIDE INDICATE POSSIBLE CAUSE SYMPTOM System will not start System runs continuously little cooling hig Compressor will not start fan runs Comp and Cond Fan will not start Evaporator fan will not start Condenser fan will not start Compressor runs goes off on overload Compressor cycles on overload Too cool and then too warm Not cool enough on warm days Certain areas too cool others too warm Compressor is noisy System runs blows cold air in heating Unit will not terminate defrost Unit will
4. NOTICE Units with reciprocating or rotary compressors 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 Consult 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 installa tion instructions supplied with the indoor furnace air handler for specific wiring connections and indoor unit configuration Like wise 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 e HACR type circuit breakers These devices have sufficient time delay to permit the motor compressor to start and accelerate its load Three Phase Compressor Rotation AX CAUTION Use care when handling scroll compressors Dome temp eratures 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 drops and discharge pressure rises when the compressor is energized NOTE When op
5. not defrost Low suction pressure Low head pressure High suction pressure High head pressure Test Voltage Inspect Fuse Size amp Type Unbalanced Power 3PH Test Voltage Loose Connection Inspect Connection Tighten Open Fan Overload Test Continuity of Overload Faulty Thermostat Test Continuity of Thermostat amp Wiring Faulty Transformer Check Control Circuit with Voltmeter Shorted or Open Capacitor Test Capacitor Internal Compressor Overload Open Test Continuity of Overload Shorted or Grounded Compressor Test Motor Windings Compressor Stuck Use Test Cord Faulty Compressor Contactor Test Continuity of Coil amp Contacts Faulty Fan Relay Test Continuity of Coil And Contacts Open Control Circuit Test Control Circuit with Voltmeter Low Voltage Test Voltage Faulty Evap Fan Motor Repair or Replace Shorted or Grounded Fan Motor Test Motor Windings Improper Cooling Anticipator Check Resistance of Anticipator Shortage of Refrigerant Test For Leaks Add Refrigerant Restricted Liquid Line Remove Restriction Replace Restricted Part Open Element or Limit on Elec Heater Test Heater Element and Controls Dirty Air Filter Inspect Filter Clean or Replace Dirty Indoor Coil Inspect Coil Clean Not enough air across Indoor Coil Check Blower Speed Duct Static Press Filter Too much air across Indoor Coil Reduce Blower Speed Overcharge of Refrigerant Recover Part of Charge Dirty Outdoor Coil Inspect Coil Clean Noncondensibles Rec
6. 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 1 Break vacuum by fully opening liquid and suction base valves 2 Set thermostat to call for cooling Check indoor and out door fan operation and allow system to stabilize for 10 minutes for fixed orifices and 20 minutes for expansion valves Charge Verification AA WARNING REFRIGERANT UNDER PRESSURE Do not overcharge system with refrigerant Do not operate unit in a vacuum or at negative pres sure Failure to follow proper procedures may cause property damage personal injury or death AQ CAUTION Use refrigerant certified to AHRI standards Used refrigerant may cause compressor damage Most portable machines cannot clean used refrigerant to meet AHRI standards NOTICE Violation of EPA regulations may result in fines or other penalties AQ CAUTION Operating the compressor with the suction valve closed will void the warranty and cause serious compressor damage Final Charg
7. CONDENSING UNIT HEAT PUMP INSTALLATION amp SERVICE REFERENCE Important Safety Instructions The following symbols and labels are used throughout this manual to indicate immediate or potential safety hazards Itis the owner s and installer s responsibility to read and comply with all safety information and instructions accompanying these symbols Failure to heed safety information increases the risk of personal injury property damage and or product damage AA WARNING Si HIGH VOLTAGE Disconnect ALL power before servicing Multiple power sources may be present Failure to do so may cause property damage ersonal injury or death AX WARNING Installation and repair of this unit should be performed ONLY by individuals meeting the requirements of an entry level technician as specified by the Air Conditioning Heating and Refrigeration Institute AHRI Attempting to install or repair this unit without such background may result in product damage personal injury or death CAUTION Scroll equipped units should never be used to evacuate the air conditioning system Vacuums this low can cause internal electrical arcing resulting in a damaged or failed compressor Shipping Inspection Always keep the unit upright laying the unit on its side or top may cause equipment damage Shipping damage and subse quent investigation is the responsibility of the carrier Verify the model number specificatio
8. OVE 10 KW TYPICAL H P ROOM THERMOSTAT HEAT PUMP 8GA TWIRE INDOOR UNIT OPTIONAL OUTDOOR THERMOSTAT CLOSE ON TEMPERATURE FALL 18 GA 7 WIRE NEEDED WHEN TWO OT S ARE USED NOMENCLATURE OT OUTDOOR THERMOSTAT OPTIONAL EHR EMERGENCY HEAT RELAY OPTIONAL NOTES 1 OUTDOOR THERMOSTAT OT 1 SHOULD BE THE FIRST TO CLOSE AND THE LAST TO OPEN 2 CONNECT WHITE AND BROWN WIRES FROM AIR BL BLUE HANDLER TOGETHER IF OT 2 IS NOT USED BR BROWN 3 REMOVE WIRE WHEN USING OUTDOOR THERMOSTAT O ORANGE 4 TERMINAL BLOCK MARKINGS ARE FOR AMANA BRAND W WHITE AIRHANDLERS G GREEN Y YELLOW Thermostat with Low Voltage Wires to Heat Pump Unit System Start Up NOTE Units with crankcase heaters should have high voltage power energized for 24 hours prior to start up Heat pumps are equipped with a time temperature defrost control with field selectable defrost intervals of 30 60 or 90 minutes This setting should be adjusted at this time if needed The defrost control also has SmartShift technology which delays compressor operation at defrost initiation and termination If disabling this function is desired move the jumper from DLY to NORM on the defrost control COLOR CODES Adequate refrigerant charge for the matching HSVTC evapora tor coil and 15 feet of lineset is supplied with the condensing unit If using eva
9. TAGE 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 com fort 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 outdoor 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 refrigerant 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 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 o
10. as issued various regulations regarding the introduc tion and disposal of refrigerants Failure to follow these regulations may harm the environment and can lead to the imposition of substantial fines Should you have any questions please contact the local office of the EPA If replacing a condensing unit or air handler the system must be manufacturer approved and Air Conditioning Heating and Refrigeration Institute matched NOTE Installation of unmatched systems is not allowed Outdoor units are approved for operation above 55 F in cooling mode Operation below 55 F in cooling mode 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 con densing 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 unob structed however if vertical conditions require placement be neath an obstruction 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 appropriate regulatory codes prior to deter mining final clearances Amana is a registered trademark of Maytag Corporation or its related co
11. duced AA WARNING To avoid possible explosion e Never apply flame or steam to a refrigerant cylinder If you must heat a cylinder for faster charging partially immerse it in warm water e Never fill a cylinder more than 80 full of liquid re frigerant Never add anything other than R 22 to an R 22 cy linder or R 410A to an R 410A cylinder The service equipment used must be listed or certified for the type of refrigerant used e Store cylinders in a cool dry place Never use a cy linder as a platform or a roller AQ WARNING To avoid possible explosion use only returnable not disposable service cylinders when removing refrig erant from a system Ensure the cylinder is free of damage which could lead to a leak or explosion Ensure the hydrostatic test date does not exceed 5 years 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 extremely susceptible to moisture absorption and could cause compressor failure Do not leave system open to atmos phere any longer than necessary for installation Use only refrigerant grade dehydrated and sealed copper tub ing 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 sho
12. e 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 system 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 AA 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 A 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 Evacuate the system to 250 microns or less using suc tion and liquid service valves Using both val
13. e Adjustment The outdoor temperature must be 60 F or higher Set the room thermostat to COOL fan switch to AUTO and set the tem perature control well below room temperature Purge gauge lines Connect service gauge manifold to base valve service ports Run the system on low stage for two stage units for 10 minutes to allow pressures to stabilize then check subcooling and or superheat as detailed in the fol lowing sections Superheat Suct Line Temp Sat Suct Temp Subcooling Sat Liquid Temp Liquid Line Temp AQ CAUTION To prevent personal injury carefully connect and disconnect manifold gauge hoses Escaping liquid refrigerant can cause urns Do not vent refrigerant into the atmosphere Recover all refrigerant during system repair and before final unit disposal o SYSTEM SUPERHEAT Outdoor Dry Bulb Indoor Wet Bulb Temperature F Temperature F 5 57 s 61 63 s 67 71 o KO 20 23 2 29 90 31 _ is m 5 5 2 rs fs 2 a1 23 SUPERHEAT FORMULA SUCT LINE TEMP SAT SUCT TEMP SATURATED LIQUID PRESSURE TEMPER ATURE CHART SATURATED LIQUID TEMPERATURE F R 410A SATURATED SUCTION PRESSURE TEMPERATURE CHART SUCTION PRESSURE SATURATED SUCTION TEMPERATURE F LIQUID PRESSURE NOTE SPECIFICATIONS AND PERFORMANCE DATA LISTED HEREIN ARE SUBJECT TO CHANGE WITHOUT NOTICE 101 NIN NN
14. erated in re verse a three phase scroll compressors is noisier and its cur rent draw substantially 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 The indoor transformer must supply 24 volt AC low voltage power to the outdoor section for the control wiring Cooling only units require 25VA minimum and heat pump units require 40VA minimum Low voltage wiring for two stage units de pends on the thermostat used and the number of control wires between the indoor unit and the condensing unit Route con trol wires through the low voltage port and terminate in accor dance with the wiring diagram provided inside the control panel cover SYSTEM COMPOSITE DIAGRAM HEAT PUMPS 10 KW amp BELOW TYPICAL H P HEAT PUMP R THERMOSTAT sonna OCOC 2 QOG INDOOR UNIT Bl wl Y R f T T T T T T L H R E E EN a mess ul 1 A L D A LE R REL i Re RED E G 7 7 f E W GREEN Hw WHITE BLUE OPTIONAL OUTDOOR THERMOSTAT CLOSE ON TEMPERATURE FALL 18 GA 6 WIRE NEEDED WHEN OT IS USED SYSTEM COMPOSITE DIAGRAM HEAT PUMPS AB
15. erwise the in door 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 plate or the finish on the unit 1 The ends of the refrigerant lines must be cut square de burred cleaned and be r
16. l 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 equipment damage Your air filter or filters could be located in your furnace blower unit or in filter grilles in your ceiling or walls The installer 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 electronic types These filters can do a better job of catching small airborne particles Compressor The compressor motor is hermetically sealed and does not require additional oiling Motors Indoor and outdoor fan motors are permanently lubricated and do not require additional oiling Clean Outside Coil Qualified Servicer Only AA WARNING HIGH VOL
17. location consideration in areas of heavy snow accumulation and or areas with prolonged continuous subfreezing temperatures Heat pump unit bases have cutouts under the outdoor coil that permit drainage of frost accumulation Situate the unit to permit free unobstructed drainage of the defrost water and ice In more severe weather locations it is recommended that the unit be elevated to allow unobstructed drainage and air flow The following elevation minimums are recommended Design Temperature 15 and above Suggested Minimum Elevation 2 1 2 5 to 14 12 Safe Refrigerant Handling While these items will not cover every conceivable situation they should serve as a useful guide AA WARNING To avoid ilo injury explosion or death practice safe handling of refrigerants 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 Never purge refrigerant into an enclosed room or space By law all refrigerants must be reclaimed Ifan indoor leak is suspected thoroughly ventilate the area before beginning work 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 Always follow EPA regulations Never burn refrigerant as poisonous gas will be pro
18. mpanies and is used under license to Goodman Company L P Houston TX All rights reserved Another important consideration in selecting a location for the unit s is the 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 installations are strongly discouraged L NOT RECOMMENDED B j 10 10 18 A B c to io 18 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 foundation 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 con sideration is given to the weather tight integrity of the roof Since the unit can vibrate during operation sound vibration transmis sion should be considered when installing the unit Vibration absorbing pads or springs can be installed between the con densing unit legs or frame and the roof mounting assembly to reduce noise vibration NOTE These units require special
19. n 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 Check the electrical panel for tripped 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 covered 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 oper ating noise that might be coming from the outdoor unit If you hear unusual noise s coming from the unit calla qualified servicer
20. ns electrical characteristics and accessories are correct prior to installation The distribu tor or manufacturer will not accept claims from dealers for trans portation damage or installation of incorrectly shipped units 2005 2013 Goodman Manufacturing Company L P 5151 San Felipe Suite 500 Houston TX 77056 www goodmanmfg com or www amana hac com P N 10 259T Date September 2013 Codes amp Regulations This product is designed and manufactured to comply with national codes Installation in accordance with such codes and or prevailing local codes regulations is the responsibility of the installer 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 performance is delivered at the specified airflow See outdoor unit specification sheet for split system models or product speci fication sheet for packaged and light commercial models Speci fication sheets can be found at www goodmanmfg com for Goodman brand products or www amana hac com for Amana brand products Within either website please select the resi dential or commercial products menu and then select the submenu for the type of product 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 h
21. ound 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 in side the refrigerant lines The POE oils used in R 410A applications 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 me tering 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 continu ally 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 gases for leak testing of a refrigeration system AA WARNING To avoid possible explosion the line from th
22. over Charge Evacuate Recharge Recirculation of Condensing Air Remove Obstruction to Air Flow Infiltration of Outdoor Air Check Windows Doors Vent Fans Etc Improperly Located Thermostat Relocate Thermostat Air Flow Unbalanced Readjust Air Volume Dampers System Undersized Refigure Cooling Load Broken Internal Parts Replace Compressor Broken Valves Test Compressor Efficiency Inefficient Compressor Test Compressor Efficiency Expansion Device Restricted Remove Restriction or Replace Expansion Device Undersized Expansion Valve Replace Valve Expansion Valve Bulb Loose Tighten Bulb Bracket Inoperative Expansion Valve Check Valve Operation Loose Hold down Bolts Tighten Bolts Faulty Reversing Valve Replace Valve or Solenoid Faulty Defrost Control Test Control Faulty Defrost Thermostat Test Defrost Thermostat Howrator Not Seating Prop Cooling or Heating Cycle Heat Pump Heating Cycle Only Heat Pump For detailed service information refer to the Remote Condensing Unit Service manual NOTICE Units with rotary or reciprocating compressors and non bleed TXV s require a Hard Start Kit 10 THIS PAGE LEFT INTENTIONALLY BLANK SPLIT SYSTEMS AIR CONDITIONING AND HEAT PUMP HOMEOWNER S ROUTINE MAINTENANCE RECOMMENDATIONS We strongly recommend a bi annua
23. porator 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 in door 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 AX 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 of refrigerant DO NOT apply pressure to the retainer When open ing valves without a retainer remove service valve cap and in sert 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 After the refrigerant charge has bled into the system open the liquid service valve The service valve cap is the secondary seal for the valve and must be properly tightened to
24. uld 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 plumb ing ductwork floor joists wall studs floors and walls When running 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 between 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 Manual or TP 107 Long Line Set Application R 410A or contact your distributor for assistance RECOMMENDED INTERCONNECTING TUBING Ft sor Line Diameter In OD Tq Suet Suct Ea a 34 38 34 380 Cond 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 Oo Suction Line
25. ves is nec essary 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 5000 4500 4000 LEAK S PRESENT 3500 3000 2500 VACUUM IN MICRONS 2000 CONDENSIBLES OR SMALL LEAK PRESENT 1500 1000 NO LEAKS NO CONDENSIBLES 500 MINUTES e Ifthe pressure rises to 1000 microns or less and remains steady the system is considered leak free proceed to startup e lf pressure rises above 1000 microns but holds steady below 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 lf pressure rises above 2000 microns a leak is present Check for leaks as previously indicated and repair as nec essary then repeat evacuation Electrical Connections AA 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 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 AA WARNING To avoid the risk of fire or equipment damage use copper conductors
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