Plantronics R-410A User's Manual
Contents
1. Cabinet top Painted P00763 P00764 P00764 P00746 P00765 14 Condenser assembly P00766 P00767 P00767 P00768 P00769 15 Cabinet Front R Painted include with ref 1 include with ref 1 include with ref 1 P00753 include with ref 1 16 Base Assembly Painted P00770 P00771 P00771 P00773 P00774 17 Capillary assembly P00775 P00776 P00776 P00777 P00777 18 Compressor assembly K00082 K00083 K00083 K00084 K00085 18 1 Compressor P00783 P00784 P00784 P00785 P00786 18 2 Special nut M8 P00787 P00787 P00787 P00787 P00787 18 3 Rubber seat P00791 P00791 P00791 P00793 P00794 18 4 Terminal gasket P00795 P00795 P00795 P00797 P00797 18 5 Terminal cover P00799 P00799 P00799 P00801 P00801 19 Noise insulation P00803 P00803 P00803 P00805 P00805 20 Sensorbracket P00807 P00807 P00807 P00807 P00807 21 Rubbercaps P00811 P00811 P00811 P00811 P00811 22 Steel Grid P00812 P00813 P00813 P00814 P00815 23 Cabinet Back R Painted P00816 P00817 P00817 P00818 P00819 24 Side plastic cover P00820 P00821 P00821 P00823 P00824 25 Electric Diagram L00028 L00028 L00028 L00029 L00029 26 Rating Plate WILLIAMSON L00145 L00146 L00147 L00148 L00149 27 Two Way valve Liquid P00831 P00832 P00832 P00830 P00833 28 Three Way valve Succion P00829 P00834 P00834 P00835 P00836 29 Valve panel P00837 P00838 P00838 P00839 P00840 30 Outdoor heat exchanger thermistor P00841 P00841 P00841 P00841 P00841 31 Discharge temperature thermistor P00842 P00842 P00842 P00842 P02. TEMP SENSOR ACL 2 LTL lo CMU 1 E ee lo INDOOR CONTROL BOARD INDOOR UNIT WIRING DIAGRAM L1 BN CAPACITOR EE RD WH PROTECTOR 5 S tee N COMPRESSOR bad bel 6 6 PRESSURE VW SWITCH 7 BU NO gt 3 Har BU ACN v I Gran x 1 3 s SWITCH Oo BN O dit 5 our O 2 it 2 FUSE FAN 3 15A 1 il 1 OR CMU A 2 OUTDOORTEMP SENSOR 2 OUTDOOR PIPE SENSOR I OUTDOOR CONTROL BOARD OUTDOOR UNIT WIRING DIAGRAM WIRING SYSTEM DIAGRAMS Terminal block of indoor unit DD c PJ g 5 e 2 J 2 2 i a 3 19 2 E 8 TT uhol z Terminal block e of outdoor unit D Power supply 1 phase 60 Hz Installation amp service Manual 6 WIRING SYSTEM DIAGRAMS 18SRA HE 24SRA HE 208 230V 60Hz INDOOR UNIT DISPLAY AND p RECEIVE BOARD 6 Z D GP ac rfl FUSE O 3 15 A 2 COMPULSIVE SWITCHING O 7 Hi 8 IPE SENSOR A JLL ACN ry 2 L 2 TEMP SENSOR O i ACL 5 z Bes 2 CMU tali lo 5 INDOOR CONTROL BOARD INDOOR UNIT WIRING DIAGRAM LI BN CAPACIT
3. P00854 P00854 P00856 P00856 P00857 7 Plastic Cover P00855 P00855 N A N A N A 8 Filters P00858 P00858 P00859 P00859 P00860 9 Middle Base P00861 P00861 P00862 P00862 P00863 10 Rating plate WILLIAMSON L00140 L00141 L00142 L00143 L00144 11 Wiring circuit diagram L00027 L00027 L00027 L00027 L00027 12 Wireless remote control P00874 P00874 P00874 P00874 P00874 13 Wireless remote control holder P00875 P00875 P00875 P00875 P00875 14 Terminal Block P00876 P00876 P00876 P00876 P00876 15 Nameplate WILLIAMSON L00138 L00138 L00138 L00138 L00138 16 Control Box P00878 P00878 P00879 P00879 P00880 17 Controller PCB P00881 P00868 P00869 P00870 P00871 18 Sensors P00882 P00882 P00882 P00882 P00882 19 Sensor Bracket P00883 P00883 P00883 P00883 P00883 20 Rubber plug back drain P00884 P00884 P00885 P00885 P00885 21 Fan Motor Assembly i K00086 K00086 K00087 K00088 K00089 21 1 Fan motor cushion P00889 P00889 P00890 P00872 P00891 21 2 Fan motor P00892 P00892 P00893 P00873 P00894 22 Evaporator Assembly P00895 P00895 P00896 P00896 P00897 23 Cross Flow Fan Assembly i K00090 K00090 K00091 K00091 K00092 23 1 Cross Flow Fan P00901 P00901 P00902 P00902 P00903 23 2 Cushion Cross flow fan P00904 P00904 P00905 P00905 P00906 24 Left Cover Cross flow fan P00907 P00907 P00908 P00908 P00909 25 Drain Hose P00910 P00910 P00911 P00911 P00912 26 Blade vertical movement P00913 P00913 P00914 P00914 P00915 27 Fan guard metal grid P00916 P00916 P00917 P00917 P009
4. are indicated in parenthesi s Accessories in the Indoor Unit Case AAA batteries for Remote control remote control 2 holder 1 Installation plate 1 Remote control 1 Owner s manual 1 Installation manual 1 Service manual 1 Warranty 1 Interconnecting wiring and conduits from the outdoor unit to the indoor unit are not provided with the air conditioner Accessories in the Outdoor Unit Case Rubber leg 4 Wall plastic sleeve 1 Installation amp service manual 2 INSTALLATION RECOMMENDATIONS INDOOR UNIT 1 Before fixing the installation plate to a wall you must determine the position of the 2 in 70 mm hole through which the conduit piping and drain hose pass to connect the indoor unit to the outdoor unit The piping and conduit can be con nected from the Rear Right or Left side of indoor unit ea EA INCORRECT CORRECT 2 Determine the position of the pipe and drain hose hole using one of the figures shown and drill the hole with an inner diameter of 70 mm 2 4 inch so that it slants slightly downwards kih W 3 The correct mounting of the indoor unit is as shown below 2 3 8 in minimum Left side 2 in minimum POSITION THE MOUNTING PLATE LEVEL 59 in minimum i ion nd 59 to 79 in minimum 1 CORRECT INCORRECT INCORRECT Caution Take servicing into consideration and leave the spacing shown in the figure above Also install the
5. to temporally cover the ends of the tubing with caps or tape prior installation Never use tubing which is less than 0 03 inch in thickness Standard Specification ASTM B 280 since air conditioners with R 410A refrigerant are subject to higher pressures than those using R 22 refrigerant Installation amp service manual 10 TIGHTENING REFRIGERANT PIPING CONNECTIONS Caution Remove the protection caps on the pipes and connect the assembly piping to each connector First tighten the nuts manually and then with a wrench by applying the tightening torque shown below Flare nut size and tightening torque Applicable size Class 2 for R410A di Diam tre mm x Tightening torque Nm va 17 x 14 to 18 26 x 49 to 61 36 x 100 to 120 4 3 8 1 2 9 8 3 4 Installation amp service manual 11 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 the valves until the system is evacuated 1 Connect the vacuum pump with 250 micron capability to the services valves 2 Evacuate the system to 250 microns or less using suction and liquid service valves Using both valves is necessary for some compressors create a mechanical seal separating the sides of the system 3 Close pump valve and hold vacuum for 10 minutes Typically pressure will rise during this period e If the pre
6. unit where it can be removed Installation amp service manual 3 INSTALLATION RECOMMENDATIONS OUTDOOR UNIT Attach the outdoor unit with 4 anchor bolts and nuts not supplied positioned as per dimensions A B A Ta 24 in minimum Air inlet f an 3 i 9 in minimum ll Je ug TL 12 in minimum Air outlet 24 in minimum 16 in minimum Caution The outdoor unit should not be exposed to strong winds or where it Is very dusty Take your neighbors into consideration so that they will not be disturbed by air blowing into their window or by noise Provide enough space between the wall and the unit so that the airflow is not blocked Also for efficient Operation leave enough clearance on both sides and front Installation amp service manual _4 ELECTRICAL INSTALLATION 1 The air conditioner shall be installed by a qualified technician in accordance with national and local electrical codes 2 A disconnect switch shall be installed near the outdoor unit for easy disconnect of power to the air conditioner 3 An electrical circuit dedicated to the air conditioner shall be used for the power supply to the air conditioner 4 Interconnecting wiring and conduits from the outdoor unit to the indoor unit are not provided with the air conditioner 5 The supply voltage size of over current protective device and size of supply conductors for the air conditioner are as shown below Models 9SRA HE 12SRA HE
7. 0842 32 Rubberlegs P00772 P00772 P00772 P00772 P00772 33 Low pressure switch P00945 P00945 P00945 P00945 P00945 34 High pressure swicth P00946 P00946 P00946 P00946 P00946 Installation amp service manual 21 NOTE Installation amp service manual Williamson Thermoflo 8201 W Calumet Road Milwaukee WI 53223 USA www Wwilliamson thermoflo com
8. 15SRA HE 18SRA HE 24SRA HE Nominal capacity 9000 12000 15000 18000 24000 Voltage rating 115 115 115 208 230 208 230 Frequency Phase 60 1 60 1 60 1 60 1 60 1 Running amperes Lat 10 6 10 6 6 8 6 4 9 6 8 7 Minimum circuit ampacity 15 15 15 15 20 Maximum overcurrent protection 15 25 25 15 20 Time delay fuse or HACR type circuit breaker Wire between outside unit and power source Wire gauge 14 Number of wires 2 wires Ground Wire between outside unit and inside unit Wire gauge 14 Number of wires 3 wires Ground 6 Unit must be installed in accordance with all applicable federal state and local codes 7 Check local electrical codes and regulations before obtaining wire 8 Use copper supply wires only 9 Each wiring connection must be done tightly and in accordance with the wiring system diagram Improper wiring may cause the unit to malfunction or become damaged Installation amp service Manual 5 9SRA HE I 12SRA HE 15SRA HE 115V 60Hz INDOOR UNIT DISPLAY AND p RECEIVE BOARD E BA 6 Z 4 CI arm FUSE 9 i 315A D 2 COMPULSIVE SWITCHING a 2 PIPE SENSOR ACN a 7 D SP hi _ 2
9. 18 28 Discharge frame assembly P00919 P00919 P00920 P00920 P00921 29 Step Motor P00877 P00877 P00886 P00886 P00924 30 Louvers horizontal movement P00925 P00925 P00926 P00926 P00927 31 Base Assembly P00928 P00928 P00929 P00929 P00930 32 Wall Hook Bracket P00931 P00931 P00932 P00932 P00933 33 Screw cap P00898 P00898 P00899 P00899 P00900 Installation amp service Manual 19 PARTS DIAGRAM OUTDOOR UNIT OUTSIDE UNIT 9SRAO HE 12SRAO HE 15SRAO HE 18SRAO HE 24SRAO HE Installation amp service manual _20 PARTS LIST OUTSIDE UNIT REF Outside unit spare parts NO DESCRIPTION 12SRAO HE 15SRAO HE 18SRAO HE 24SRAO HE 1 Cabinet Front L Painted including fan cover P00730 P00731 P00731 P00732 P00733 2 Controlboxcover P00734 P00734 P00734 P00734 P00734 3 Propellerfan P00738 P00738 P00738 P00739 P00739 4 Motorbracket P00740 P00741 P00741 P00742 P00743 5 Fanmotor P00744 P00744 P00744 P00745 P00745 6 Nameplate WILLIAMSON L00139 L00139 L00139 L00139 L00139 7 PCBoutdoor P00747 P00747 P00747 P00748 P00748 8 Control box P00749 P00735 P00735 P00750 P00751 9 Capacitor Compressor P00752 P00752 P00752 P00754 P00755 10 Capacitor clamp P00756 P00756 P00756 P00758 P00736 11 Terminal block P00757 P00757 P00757 P00759 P00759 12 Divider wall P00760 P00761 P00761 P00737 P00762 13
10. A HE I 15SRA HE I 18SRA HE I 24SRA HE Limit of tubing length ft m Limit of elevation between the two unit Installation amp service manual 13 GAS LEAK CHECK Check that no gas escapes from the connections by using a leak detector or soapy water A and B are the liquid and suction valves of the outdoor unit C and D are the extremities of the indoor unit flared connections Indoor unit check points Liquid and suction valves Installation amp service manual 14 CHECKING AND TESTING OPERATIONS Perform the operation test after completing the gas leak check of the flare nut connections and the electrical connections 1 To begin the test turn on the power 2 Press the auxiliary control button in the indoor unit or use the remote control to start the unit 3 Check that all air conditioner functions are operating normally A protection feature prevents the air conditioner from being started immediately after the unit has been turned off There is a delay of 3 minutes for the air conditioner to restart and operate 4 Press the auxiliary control button to end the operation test 9 000 12 000 BTU 15 000 18 000 24 000 BTU Auxiliary control button Auxiliary control button Installation amp service manual 15 TECHNICAL SPECIFICATIONS SPECIFICATIONS MODELS 9SRA HE 12SRA HE 15SRA HE 18SRA HE 24SRA HE P
11. OR PA aa pis ia 2 WH IONE s pi COMPRESSOR HIGH Orr ey 7 BU AN NO Gi AE Sn T amp O BN O 5 Q 2 iki 2 FUSE oN Z 315A 1 Di 1 OR CMU 2 OUTDOORTEMP SENSOR 4 J OUTDOOR CONTROL BOARD OUTDOOR UNIT WIRING DIAGRAM Installation amp service manual 7 Terminal block of indoor unit D ACN wire Ground wire Communication ACL wire E N Terminal block of outdoor unit Power supply 1 phase 60 Hz LINN Y000NI LINN YOO0CLNO ELECTRICAL CONNECTIONS FOR INDOOR AND OUTDOOR UNITS INDOOR UNIT 1 The indoor unit is powered from the outdoor unit A sufficient length of conduit and wiring shall be used from the outdoor unit to the indoor unit 2 To access the terminal block inside the indoor unit remove the screw on the cover plate See Fig A 3 Connect the inter unit conductors to terminals marked 1 2 3 on the indoor unit corresponding to the same numbered terminals from the outdoor unit See Fig B Figure A Terminal block Figure B Terminal block of indoor unit FER Cover plate 1 OUTDOOR UNIT 1 Two conduit connection openings are provided on the outdoor unit one for incoming power supply and the second one for the inter unit wiring 2 Remove the terminal box cover to access the terminal block 3 Connect the power supply conductors to terminal marked L1 N or L1 L2 and the grounding wire
12. This system uses R 410A NA Williamson Thermoflo INSTALLATION amp SERVICE MANUAL MODEL N 9SRA HE 12SRA HE 15SRA HE 18SRA HE 24SRA HE IMPORTANT Please Read Before Starting This air conditioning system meets strict safety and operating standards As the installer or service person it is an important part of your job to install or service the system so it operates safely and efficiently For safe installation and trouble free operation you must e Carefully read this instruction booklet before beginning e Follow each installation or repair step exactly as shown Observe all local state and national electric codes e Pay close attention to all danger warning and caution notices given in this manual A WARNING This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death A CAUTION This symbol refers to a hazard or unsafe practice which can result in personal injury and the potential for product or property damage Caution In order to avoid injury take proper precaution when lifting heavy objects Caution Sharp sheet metal edges can cause injury When installing the unit avoid accidental contact with sharp edges Installation amp service manual Safety considerations Accessories Installation recommendations indoor unit Installation recommendations outdoor unit Electrical installation Wiring system diagram Electrical
13. at enables the piping and wiring to be easily connected to the outdoor unit 4 Leave enough clearance beneath the indoor unit to enable the filters to be removed without hinderance 5 Maintain sufficient clearance around the indoor unit 6 Make sure that the water from the drain hose runs away correctly and safely 7 Install the indoor unit on a strong wall which is not subject to vibration 8 Do NOT install the unit where it will be exposed to direct sunlight About outdoor unit 1 The outdoor unit must NEVER be placed on its side or upside down as the compressor lubrication oil will run in the cooling circuit and seriously damage the unit 3 Choose a location where the noise of the air conditioner when running and the discharged air do not disturb any neighbors 4 Choose a position that enables the piping and wiring to be easily connected to the indoor unit 5 Install the outdoor unit on a flat stable surface that can support its weight and does not generate any unnecessary noise and vibration 6 Position the outdoor unit so that the air flow is directed away from exterior walls as indicated by the arrows on the top of the unit 7 Maintain sufficient clearance around the outdoor unit 8 If the outdoor unit is installed above grade with brackets ensure that its base is firmly fixed in position Installation amp service manual _ 1 ACCESSORIES The following accessories are supplied with the air conditioner e The quantities
14. connections for indoor and outdoor units Refrigerant line connections Refrigerant R410A special precautions when installing unit Tightening refrigerant piping connections System evacuation Additional charge Gas leak check Checking and testing operation Technical specifications Outline and dimensions Parts diagram indoor unit Parts list indoor unit Parts diagram outdoor unit Parts list outdoor unit CONTENTS 12 13 14 15 16 17 18 19 20 21 Installation amp service Manual SAFETY CONSIDERATIONS This manual is a guide for properly installing the Williamson Thermoflo Wall mounted split air conditioner Improper installation can result in unsafe and dangerous conditions that will void the factory warranty Prior to installation read these instructions and any instructions that are packaged with separate pieces of equipment that make up the system Please read these instructions thoroughly and carefully before attempting installation or operation Failure to follow these instructions may result in improper installation operation service or maintenance possibly resulting in fire electrical shock property damage personal injury or death General This device must be installed in compliance with national electrical standards About the indoor unit 1 There must be no obstacles near the air inlet and outlet 2 Install the indoor unit on a surface that can support its weight 3 Choose a position th
15. erformance ratings Nominal capacity BTU h Cooling 9 000 12 000 15 000 18 000 24 000 S E E R BTU hW Cooling 15 13 5 14 13 5 13 Refrigerant type R 410A R 410A R 410A R 410A R 410A Dehumidifying capacity Pt H 1 9 3 1 3 5 4 1 5 2 Airflow circulation High CFM 382 441 559 647 765 Indoor sound rating High Medium Low dB A 44 40 33 45 42 34 47 44 40 48 44 40 52 49 45 Qutdoor sound rating dB A 50 52 55 56 59 Temperature Indoor air intake TF Maximum 95 35 95 35 95 35 95 35 95 35 Minimum 64 18 64 18 64 18 64 18 64 18 Outdoor air intake SEIGE Maximum 109 43 109 43 109 43 109 43 109 43 Minimum 32 0 32 0 32 0 32 0 32 0 Electrical data Voltage rating V 115 115 115 208 230 208 230 Frequency Phase Hz 60 1 60 1 60 1 60 1 60 1 Running amperes A Cooling 1 1 10 6 10 7 6 8 6 4 9 6 8 7 Minimum circuit ampacity A 15 15 15 15 20 Maximum overcurrent protection A 15 25 25 15 20 Time delay fuse or HACR type circuit breaker Refrigeration tubing Connection method Flare Flare Flare Flare Flare Refrigerant tube outer diameter in Liquid 1 4 1 4 1 4 1 4 3 8 Suction 1 2 1 2 1 2 5 8 5 8 Limit of tubing length ft 49 49 49 49 49 Limit of elevation difference between the two units ft 20 20 20 20 20 Dimensions amp weight Indoor unit Dimensions in Width 31 1 2 31 1 2 38 3 4 38 3 4 42 1 2 Height 10 7 8 10 7 8 12 5 8 12 5 8 13 Depth 8 1 4 8 1 4 11 2 71 2 9 1 4 Weight Ibs Shipping 22 22 33 33 39 Net 19 19 29 29 35 Outdoor un
16. it Dimensions in Width 31 3 4 33 7 8 33 7 8 37 1 2 38 1 4 Height 23 1 2 25 5 8 25 5 8 33 3 4 37 1 2 Depth 11 1 4 12 12 13 3 4 14 1 4 Weight lbs Shipping 92 101 101 139 150 Net 88 95 95 130 141 Note Design and specifications are subject to change without notice for product improvement Comply with ARI STANDARD 210 240 Installation amp service manual 16 OUTLINE AND DIMENSIONS Models 9SRA HE 12SRA HE 15SRA HE 18SRA HE 24SRA HE Indoor unit c 7 lt 0000000000000000 1000000000000000 23 25 25 36 1114 12 12 1334 1414 1418 1434 1434 1614 1614 Installation amp service manual 17 PARTS DIAGRAM INDOOR UNIT INSIDE UNIT 9SRAI HE 12SRAI HE 15SRAI HE 18SRAI HE 24SRAI HE 13 1 Installation amp service manual 18 PARTS LIST INSIDE UNIT Inside unit spare parts Ta DESCRIPTION QTY 9SRAI HE 12SRAI HE 15SRAI HE 18SRAI HE 24SRAI HE 1 Faceplate including display glass P00843 P00843 P00844 P00844 P00845 2 Lampboardholder P00846 P00846 P00864 P00864 P00865 3 Lamp Board 3 lights infrared lense P00847 P00847 P00848 P00848 P00849 4 Lamp board back cover P00850 P00850 P00866 P00866 P00867 5 Control Box Cover P00851 P00851 P00852 P00852 P00853 6 Terminal block Cover
17. ssure rises to 1000 microns or less and remains steady the system is considered leak free proceed to startup e Ifthe 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 If pressure rises above 2000 microns a leak is present Check for a leaks as previously indicated and repair as necessary then repeat evacuation Manifold valve Low pressure side valve EE High pressure side valve U Charging hose Charging hose La Vacuum pum B A ii Lal gt LI pe el SIN sii NI 77777777777 A Caution Refrigerant must not be discharged into the atmosphere After connecting the piping check the joints for leakage with a gas leak detector Installation amp service manual _12 ADDITIONAL CHARGE AND DISTANCE Refrigerant suitable for a piping length of 20 ft 6 m is charged in the outdoor unit at the factory When the pipe is longer than 20 ft 6 m additional charging is necessary This operation can only be performed by a qualified refrigeration specialist Additional amount must be added for each extra 3 3 ft 1 m see the table below 12SRA HE 15SRA HE 18SRA HE Additional refrigerant 20 g 0 7 oz 30 g 1 06 oz 40 g 1 41 oz Models 9SRA HE I 12SR
18. to terminal marked 4 Connect the inter unit conductors to terminals marked 9 3 2 1 9SRA HE 12SRA HE 15SRA HE 115V 60Hz 18SRA HE 24SRA HE 208 230V 60Hz seo a ES LI N 3 2 1 SN UL D Conduit Conduit Conduit Conduit connectors connectors Incoming power supply Incoming power supply To indoor unit To indoor unit Installation amp service manual 8 REFRIGERATION LINE CONNECTIONS When connecting the refrigerant tubing Keep all tubing runs as short as possible Use the flare method for connecting tubing Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them then tighten the nut with a torque wrench for a leak free connection Check carefully for leaks before starting the test run k Compressor FT 7 3 Way valve 6 5 S Sure se E Bil SII LU oO o t X 2 Way valve E pla Capillary tube Models 9SRA HE 12SRA HE 15SRA HE 18SRA HE 24SRA HE Refrigeration Tubing Connection method Refrigerant tube outer diameter in Liquid in Suction Limit of tubing length ft Limit of elevation difference between the two units ft Installation amp service manual 9 REFRIGERANT R410A SPECIAL PRECAUTIONS WHEN INSTALLING UNIT Caution The compressor POE oil for R 410A units is extremely susceptible to moisture absorption and could cause compressor fail
19. ure Do not leave system open to atmosphere any longer than necessary for installation General Information Systems using R 410A refrigerant run at a pressure of approximately 1 6 times that of similar systems using R 22 and the energy efficiency is comparable The R 410A refrigerant is a 50 50 mixture of R 32 and R 125 When installing equipment using R 410A refrigerant there are a number of standards that must be met e Ester oil is used for R 410A e It s important to work with absolute cleanliness e Brazing must be done with the use of Nitrogen e The system must always be charged in the liquid state When refrigerant R 410A is used the composition will differ depending on whether or not it is a gaseous state Consequently always charge the refrigerant while it is in a liquid state General Precautions Refrigerant leaking The composition of refrigerant R 410A changes when it is gaseous state Thus when there is a refrigerant leak the basic performance of the air conditioner may be degraded because of a change in composition of the remaining refrigerant Therefore do not add new refrigerant Instead recover the remaining refrigerant with the refrigerant recovery unit Then after evacuation totally recharge the unit with the specified amount of new refrigerant at it s normal mixed composition state Tubing Precautions The refrigerant R 410A is less is more easily affected by dust or moisture than R 22 refrigerant Make sure
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