Manual No. ’08 . SRK-T .
CONTENTS 1 GENERAL INFORMATION.................................................................... 1 1.1 Specific features............................................................................ 1 1.2 How to read the model name ....................................................... 1 2 SELECTION DATA ................................................................................ 2.1 Specifications ................................................................................ 2.
6 MAINTENANCE DATA .......................................................................... 30 6.1 Troubleshooting procedures for electrical equipment .............. 30 6.2 Servicing ........................................................................................ 48 7 REFRIGERANT PIPING INSTALLATION / SERVICING MANUAL FOR AIR CONDITIONERS USING R410A ........................................... 49 7.1 Outline ..........................................................................................
1 GENERAL INFORMATION 1.1 Specific features The “MITSUBISHI HEAVY INDUSTRIES, LTD” room air-conditioner: SRK series are of split and wall mounted type and the unit consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling or heating equipment with operation control switch and the outdoor unit is composed of condensing unit with compressor.
2 SELECTION DATA 2.
Model SRK60ZHX-S (Indoor unit) SRC60ZHX-S (Outdoor unit) (220/230/240V) Model SRK60ZHX-S Item Refrigerant piping Operation data(1) Cooling capacity(1) Heating capacity(1) Power source Cooling input Running current (Cooling) Heating input Running current (Heating) Inrush current COP Sound level Cooling Power level Noise level Sound level Heating Power level Exterior dimensions Height × Width × Depth Color Net weight Refrigerant equipment Compressor type & Q’ty Motor Starting method Heat exchanger Refr
2.2 Range of usage & limitations Models SRK50ZHX-S, 60ZHX-S Item Indoor return air temperature (Upper, lower limits) Cooling operation : Approximately 18 to 32˚C Heating operation : Approximately 15 to 30˚C Outdoor air temperature (Upper, lower limits) Cooling operation : Approximately -15 to 46˚C Heating operation : Approximately -15 to 21˚C Refrigerant line (one way) length Max. 30m Vertical height difference between outdoor unit and indoor unit Max. 20m (Outdoor unit is higher) Max.
(2) Outdoor unit Models SRC50ZHX-S, 60ZHX-S Unit: mm 2-R Drain hole 50.6 12 17.9 327.3 89 510 201 14.8 83.5 290 312.5 351.6 327.3 24.3 43.5 6 2-15.5×12 71.2 800 Terminal block 640 148.4 33.5 Ground terminal Service valve(Gas) Flare connection ø12.7(1/2") 93 12.4 40˚ 42.5 40˚ Service valve(Liquid) Flare connection ø6.35(1/4") 2.4 Piping system Models SRK50ZHX-S, 60ZHX-S Indoor unit Outdoor unit Cooling cycle Heating cycle Flare connection Humidity sensor Piping (Gas) ø12.
2.5 Selection chart Correct the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity can be obtained in the following way. Net capacity = Capacity shown on specification ✕ Correction factors as follows. (1) Coefficient of cooling and heating capacity in relation to temperatures Coefficient of cooling & Heating capacity in relation to temperature 1.3 1.2 Cooling 1.1 1.0 Heating 0.9 0.8 0.7 0.6 Cooling operation Outdoor air D.B. temperature ˚CD.
CNE Th 1 Th 2 Th 3 PRINTED CIRCUIT BOARD t˚ CNG 5 M SM 3 5 5 M SM 4 5 5 M SM 2 5 5 M SM 1 CNX1 BACK-UP S W t˚ 5 DS CNX2 Meaning of marks Symbol t˚ 5 HD 2 CNF 5 M SM 5 CNY LS INTERFACE KIT SC-BIKN 5 CNS Parts name Symbol Compressor motor Fuse Fan motor (Indoor) Fan motor (Outdoor) Flap motor (L) Flap motor (R) Louver motor (L) Louver motor (R) Inlet motor CM F FMI FMO SM 1 SM 2 SM 3 SM4 SM5 Parts name Th 1 Th 2,3 Th 4 Th 5 Th 6 HD ZNR Symbol Room temp.
4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 4.1 Operation control function by remote control switch Remote control Models All models S Operation section FAN SPEED button OPERATION MODE select button Each time the button is pressed, the display is switched over in turn. Each time the button pressed, the display is switched over in turn. ON/OFF (luminous) button HI POWER/ECONO button Press to start operation, press again to stop. This button changes the HIGH POWER/ ECONOMY mode.
4.2 Unit ON/OFF button When the remote control batteries become weak, or if the remote control is lost or malfunctioning, this button may be used to turn the unit on and off. (1) Operation Push the button once to place the unit in the automatic mode. Push it once more to turn the unit off. (2) Details of operation The unit will go into the automatic mode in which it automatically determines, from room temperature (as detected by sensor), whether to go into the cooling, thermal dry or heating modes.
4.5 Flap and louver control Control the flap and louver by AIRFLOW (LEFT/RIGHT) button on the wireless remote control. (UP/DOWN) and (1) Flap Each time when you press the AIRFLOW (UP/DOWN) button the mode changes as follows. (Flap stopped) (Swing) • Angle of Flap from Horizontal Remote control display COOL , DRY, FAN Approx. 5˚ Approx. 20˚ Approx. 35˚ Approx. 45˚ Approx. 60˚ HEAT Approx. 20˚ Approx. 35˚ Approx. 45˚ Approx. 60˚ Approx.
4.6 3D auto operation Control the flap and louver by 3D AUTO button on the wireless remote control. Air flow selection and air flow direction are automatically controlled, allowing the entire room to efficiently conditioned. (1) During Cooling and Heating (Including auto cooling and heating) (a) Air flow selection is determined according to room temperature and setting temperature. Operation mode At cooling At heating Air flow selection AUTO Room temp. – Setting temp. >5˚C Room temp. – Setting temp.
4.7 Timer operation (1) Comfortable timer setting (ON timer) If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating in auto mode operation is selected, the comfortable timer starts and determines the starting time of next operation based on the initial value of 15 minutes and the relationship between the room temperature at the setting time (temperature of room temperature sensor) and the setting temperature.
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4.12 Protective control function (1) Frost prevention control (During cooling or dehumidifying) (a) Operating conditions 1) Indoor heat exchanger temperature (Th2) is lower than 5ºC. 2) 5 minutes after reaching the inverter command speed except 0 rps. Inverter command speed (b) Detail of anti-frost operation Item Indoor heat exchanger temperature Lower limit speed 5°C or lower 2.
(4) Cooling low outdoor temperature protective control (a) Operating conditions: When the outdoor air temperature (Th5) is 22ºC or lower continues for 20 seconds while the inverter command speed is other than 0 rps. (b) Detail of operation: 1 The lower limit of the inverter command speed is set to 44 (30) rps and even if the speed becomes lower than 44 (30) rps, the speed is kept to 44 (30) rps. However, when the thermo becomes OFF, the speed is reduced to 0 rps.
(6) Heating overload protective control (a) Operating conditions : When the outdoor air temperature (Th5) is 17˚C or higher continues for 30 seconds while the inverter command speed other than 0 rps. (b) Detail of operation: 1 Taking the upper limit of inverter command speed range at 50 rps, if the output speed obtained with the fuzzy calculation exceeds the upper limit, the upper limit value is maintained.
(8) Compressor overheat protection (a) Purpose: It is designed to prevent deterioration of oil, burnout of motor coil and other trouble resulting from the compressor overheat. (b) Detail of operation 1) Speeds are controlled with temperature detected by the sensor mounted on the discharge pipe. (Example) Fuzzy 4 rps (1) After lapse of 3 min. or over (3) After lapse of 3 min. or over (3) After lapse of 3 min.
(13) Serial signal transmission error protection (a) Purpose: Prevents malfunction resulting from error on the indoor ↔ outdoor signals. (b) Detail of operation: If the compressor is operating and a serial signal cannot be received from the indoor control with outdoor control having serial signals continues for 7 minute and 35 seconds, the compressor is stopped.
5 APPLICATION DATA SAFETY PRECAUTIONS ¡ Please read these "Safety Precautions" first then accurately execute the installation work. ¡ For installing qualified personnel, take precautions in respect to themselves by using suitable protective clothing, groves, etc., and then perform the installation works.
WARNING ¡ Do not put the drain pipe directly into the ditch where toxic gas such as sulfur is generated. Toxic gas would flow into the room. Also, this may cause corrosion of indoor unit, and malfunction or refrigerant leakage. ¡ Be sure to bring back the packing material, form polystyrene, band and vinyl back etc., of the indoor and/or outdoor units after complete the installation work, and then implement appropriate measures such as breaking them.
5.1 Selection of location for installation (1) Indoor unit (a) (b) (c) (d) (e) (f) (g) (h) (i) (j) Where there is no obstructions to the air flow and where the cooled and heated air can be evenly distributed. 6.5 cm A solid place where the unit or the wall will not vibrate. A place where there will be enough space for servicing. Left side (Where space mentioned right can be secured) 5 cm Where wiring and the piping work will be easy to conduct.
(m) Installation space 1) 2) 3) 4) 5) 6) Walls surrounding the unit in the four sides are not acceptable. There must be a 1-meter or larger space in the above. When more than one unit are installed side by side, provide a 250mm or wider interval between them as a service space. In order to facilitate servicing of controllers, please provide a sufficient space between units so that their top plates can be removed easily. Where a danger of short-circuiting exists, install guide louvers.
5.2 Installation of indoor unit (1) Installation of installation board (a) Fixing of installation board Adjustment of the installation board in the horizontal direction is to be conducted with four screws in a temporary tightened state. Look for the inside wall structures (Intersediats support or pillar and finally install the unit after level surface has been checked.
(3) Preparation of indoor unit (a) Mounting of connecting wires 1) Open the air inlet panel. 2) Remove the service panel. 3) Remove the wiring clamp. 4) Connect the connecting wire securely to the terminal block. Use cables for interconnection wiring to avoid loosening of the wires. CENELEC code for cables. Required field cables. H05RNR4G1.
[Drain hose changing procedures] 1. Remove the drain hose. 2. Remove the drain cap. ¡Remove the screw and drain ¡Remove it with hand or hose, making it rotate. pilers. 3. Insert the drain cap. 4. Connect the drain hose. ¡Insert the drain cap which was removed at ¡Inserted the drain hose securely, making rotate. procedure “2” securely using a hexagonal And install the screw. wrench etc.
5.3 Installation of outdoor unit (1) Installation of outdoor unit (a) Make sure that the unit is stable in installation. Fix the unit to stable base. (b) When installing the unit at a higher place or where it could be toppled by strong winds, secure the unit firmly with foundation bolts, wire, etc. (c) Perform wiring, making wire terminal numbers conform to terminal numbers of indoor nuit terminal block. (d) Connect using ground screw located near mark.
(3) Air purge (a) Tighten all flare nuts in the pipings both indoor and outside will so as not to cause leak. (b) Connect service valve, charge hose, manifold valve and vacuum pump as is illustrated below. (c) Open manifold valve handle Lo to its full width, and perform vacuum or evacuation. Continue the vacuum or evacuation operation for 15 minutes or more and check to see that the vacuum gauge reads – 0.1 MPa (– 76 cmHg).
5.5 Test run (1) Conduct trial run after confirming that there is no gas leaks. (2) When conducting trial run set the remote control thermostat to continuous operation position. However when the power source is cut off or when the unit’s operation switch is turned off or was turned to fan operation position, the unit will not go into operation in order to protect the compressor. (3) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms.
6 MAINTENANCE DATA 6.1 Troubleshooting procedures for electrical equipment (1) Cautions 1 If you are disassembling and checking an air conditioner, be sure to turn off the power before beginning. When working on indoor units, let the unit sit for about 1 minute after turning off the power before you begin work.
(4) Troubleshooting procedure (If the air conditioner runs) Confirm the contents of the customer complaint. NO The cause of the trouble can be specifically identified. Eliminate the cause of the trouble and perform an operation check. Check the self-diagnosis display. See page 32. Is an error code displayed by the self-diagnosis function? YES NO Using the Service Mode, access the self-diagnosis displays generated in the past. See pages 33~36.
(5) Self-diagnosis table When this air conditioner performs an emergency stop, the reason why the emergency stop occurred is displayed by the flashing of display lights. If the air conditioner is operated using the remote control 3 minutes or more after the emergency stop, the trouble display stops and the air conditioner resumes operation.
(6) Service mode (Trouble mode access function) This air conditioner is capable of recording error displays and protective stops (service data) which have occurred in the past. If self-diagnosis displays cannot be confirmed, it is possible to get a grasp of the conditions at the time trouble occurred by checking these service data.
*3: To count the number of flashes in the service mode, count the number of flashes after the light lights up for 1.5 second initially (start signal). (The time that the light lights up for 1.5 second (start signal) is not counted in the number of flashes.) • In the case of current cut (example: stop code “42”) The RUN light (10’s digit) flashes 4 times and the TIMER light (1’s digit) flashes 2 times. 4 × 10 + 2 × 1 = 42 → From the table, read the instructions for error code 42, “current cut”. 1.5 sec.
(Example) Remote control setting Operation switching Cooling Displayed data Fan speed Temperature switching setting MED 21°C Displays the reason for the stop (error code) the previous time an error was displayed. 22°C Displays the reason for the stop (error code) 2 times previous when an error was displayed. 23°C Displays the reason for the stop (error code) 3 times previous when an error was displayed.
(c) Error code, stop code table (Assignment of error codes and stop codes is done in common for all models.) Number of flashes when in service mode Stop coad or RUN TIMER Error coad light light (10's digit) (1's digit) OFF 3 time flash 4 time flash 5 time flash 6 time flash 8 time flash Error content Cause Occurrence conditions OFF 0 Normal - - 5 time flash 05 Can not receive signals for 35 seconds (if communications have recovered) Power supply is faulty.
Note (1) The number of flashes when in the Service Mode do not include the 1.5 second period when the lights light up at first (starting signal). (See the example shown below.) • In the case of current cut (example: stop code “42”) The RUN light (10’s digit) flashes 4 times and the TIMER light (1’s digit) flashes 2 times. 4 × 10 + 2 × 1 = 42 → From the table, read the instructions for error code 42, “Current cut”. 1.5 sec. RUN light (10’s digit) ON OFF 0.5 sec. 0.5 sec.
(e) Room temperature sensor temperature, indoor heat exchanger sensor temperature, outdoor air temperature sensor temperature, outdoor heat exchanger sensor temperature table Units: °C TIMER light (1’s digit) RUN light (10’s digit) 0 1 2 3 4 5 6 7 8 9 6 -60 -61 -62 -63 -64 5 -50 -51 -52 -53 -54 -55 -56 -57 -58 -59 4 -40 -41 -42 3 -30 -31 -32 -43 -44 -45 -46 -47 -48 -49 -33 -34 -35 -36 -37 -38 -39 2 -20 -21 1 -10 -11 -22 -23 -24 -25 -26 -27 -28 -
(f) Discharge pipe temperature table Units: °C TIMER light (1’s digit) RUN light (10’s digit) 0 1 2 3 4 5 6 7 8 9 3 -60 -62 -64 2 -40 -42 -44 -46 -48 -50 -52 -54 -56 -58 1 -20 -22 -24 -26 -28 -30 -32 -34 -36 -38 -2 -4 -6 -8 -10 -12 -14 -16 -18 Buzzer sound (minus) Yes (sounds for 0.
Service data record form Model Customer Date of investigation Machine name Content of complaint Display results Remote control settings Temperature setting Operation switching Fan speed switching MED Cooling Heating 26 Cooling Cooling 22 Heating 27 Cooling Cooling 23 28 Cooling Cooling Heating Cooling Cooling 25 Cooling Remote control information on previous occasion. MED Outdoor air temperature sensor temperature on previous occasion.
(7) Inspection procedures corresponding to detail of trouble [Broken sensor wire, connector poor connection] Sensor error Is connector connection good? NO Correct connection. YES NO Is sensor resistance value good? Replace sensor. YES Replace PCB. ◆ Sensor temperature characteristics (Room temp., indoor unit heat exchanger temp., outdoor unit heat exchanger temp., outdoor air temp.
[Open phase on compressor output terminal, compressor lock] Current cut Does current cut operate when operating inverter with compressor wire disconnected? YES Defective outdoor PCB NO Is output voltage applied to all 3 phases of power transistor? YES Defective outdoor PCB NO YES Secure space for suction and blow out. Is there any shortcircuit? NO ¡ Check compressor wiring visually. Inspect compressor. If check results are normal, compressor is locked. ¡ Check insulation resistance.
[Gas shortage, defective discharge pipe sensor] Over heat of compressor Is discharge pipe sensor resistance value good? NO (page 41) Connector connection check, resistance value check, replacement of discharge pipe sensor YES Is sufficient quantity of refrigerant circulated? NO Does trouble persist after charging gas? NO Check if there are any places where gas is leaking. YES YES Clogged capillary tube or strainer, defective EEV, etc.
[Defective fan motor, connector poor connection, defective PCB] Outdoor fan motor error Is connector connection good? NO Correct connector connection YES * Disconnect the fan motor connector, then investigate the DC fan motor and outdoor unit circuit board separately.
(b) Outdoor unit Phenomenon Sensor Operation mode Heat exchanger sensor Cooling System can be operated normally. Compressor stop. Heating Defrosting is not performed. Defrosting is performed for 10 minutes at approx. 35 minutes. Outdoor air temperature sensor Cooling System can be operated normally. Compressor stop. Heating Defrosting is not operated. Defrosting is performed for 10 minutes at approx. 35 minutes. Discharge pipe sensor All modes Compressor overload protection is disabled.
- 46 - Indoor unit Powewr Source 1 Phase 220-240V 50Hz T T L N 3 2 1 N YG YG WH 250V 20A F Outdoor unit ◆ Power source and serial signal inspection L to N : AC 220/230/240V 1 to 2: AC 220/230/240V 2 to 3: Normal if the voltage oscillates between DC 0 and approx. 20V Color symbol Black BK Brown BR Orange OR RD Red WH White YE Yellow YG Yellow/Green High voltage is produced in the control box. Don’t touch electrical parts in the control box for 5 minutes after the unit is stopped.
◆ Power transistor inspection procedure [Use a tester with a needle indicator for the inspection. (Do not use a digital tester. Check in the AC 300 volt range.)] (1) If there is a self-diagnosis display, inspect the compressor system (burns, wiring mistakes, etc.) If no problems are found, check the output of the power transistor. (2) Output inspection procedure Disconnect the terminals for the compresseor.
6.2 Servicing (1) Evacuation The evacuation is an procedure to purge impurities......noncondensable gas, air, moisture from the refrigerant equipment by using a vacuum pump. Since the refrigerant R410A is very insoluble in water, even a small amount of moisture left in the refrigerant equipment will freeze, causing what is called water clogging. ¡ Evacuation procedure (a) Check to ensure that there is no internal pressure in the unit.
7 REFRIGERANT PIPING INSTALLATION/SERVICING MANUAL FOR AIR CONDITIONERS USING R410A (These materials are extracted from document issued by The Japan Refrigeration and Air Conditioning Industry Association) 7.1 Outline 7.1.
(3) Lubricating oils for R410A As the lubricating oils for R22, mineral oils, alkylbenze synthetic oils, etc. have so far been used. As R410A features less solubility with these conventional lubricating oils such as mineral oils, the lubricating oils tend to stay within the refrigeration cycle. As the lubricating oils highly soluble with R410A, ester, ethereal and other synthetic oils are available.
(2) Joints For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants. a) Flare joints Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm. In such a case, socket joints can be used. Sizes of flare pipe ends, flare joint ends and flare nuts are as shown in Tables 5~8 (see on page 52, 53) below. Also, union, half union, Tee-type union and elbow-type union shapes are generally used (see Fig 1).
d) Flare processing øD Make certain that a clamp bar and copper pipe have been cleaned. A By means of the clamp bar, perform the flare processing correctly. Use either a flare tool for R410A or conventional flare tool. Flare processing dimensions differ according to the type of flare tool. Be careful. When using a conventional flare tool, be sure to secure “dimension A” by using a gage for size adjustment. Fig.3 Flare processing dimensions Table 5.
Table 8. Flare and flare nut dimensions for R22 (2) [unit: mm] Dimension (mm) Nominal diameter Outer diameter (mm) Thickness (mm) 1/4 6.35 0.8 9.0 9.2 6.5 13 17 3/8 9.52 0.8 13.0 13.5 9.7 20 22 1/2 12.70 0.8 16.2 16.0 12.9 20 24 5/8 15.88 1.0 19.4 19.0 16.0 23 27 A B C D Flare nut width Flare connecting procedures and precautions a) Make sure that the flare and union portions do not have any scar or dust, etc.
(2) Identification a) Piping set A copper pipe as piping set for R410A must have a thickness as stated in Table 3 (see on page 50), and, as shown in Tables 5 and 6 (see on page 52), it also differs from R22 in flare processing and flare nut dimensions. So, it is necessary to choose a piping set suitable for R410A. b) Copper pipe with insulation Before using a copper pipe with insulation, make sure that it has a thickness designated for R410A.
(3) Flux a) Reasons for the use of flux • By removing the oxide film and any foreign matter on the metal surface, it assists the flow of brazing filler. • In the brazing process, it prevents the metal surface from being oxidized. • By reducing the brazing filler’s surface tension, the brazing filler adheres better to the treated metal. b) Properties required for flux • Temperature at which flux is active coincides with the brazing temperature.
Reducing valve Nitrogen gas M Flow meter Stop valve From the nitrogen cylinder Piping Nitrogen gas Rubber plug for sealing Fig.5 Prevention of oxidation during brazing * Cautions during brazing 1 General cautions 1) The brazing strength should be high as required. 2) After operation, airtightness should be kept under a pressurized condition. 3) During brazing do not allow component materials to become damaged due to overheating.
(1) Tools exclusive for R410A a) Gauge manifold • As R410A is characterized by high pressure, conventional tools cannot be used. Table 11. Differences between conventional high/low pressure gauges and those for R410A Conventional gauges Gauges exclusive for R410A High pressure gauge (red) -0.1~3.5MPa -76 cmHg~35 kgf/cm2 -0.1~5.3MPa -76 cmHg~53 kgf/cm2 Compound gauge (blue) -0.1~1.7MPa -76 cmHg~17 kgf/cm2 -0.1~3.
e) Flare tool (clutch type) • A flare tool for R410A is provided with a large clamp bar receiving hole so that the projection of the copper pipe from the clamp bar can be set at 0~0.5 mm in flare processing, and also features higher spring strength for increased expansion pipe torque. This flare tool can also be used for R22 copper pipe. f) Gauge for projection adjustment (used when flare processing is made by using conventional flare tool [clutch type]) • A gauge 1.
7.3.2 New installation work (when using new refrigerant piping) (1) Air purge by vacuum pump and gas leakage inspection (see Fig. 6) a) Connect the charge hose to the outdoor unit. 1 b) Connect the charge hose to the vacuum pump adapter. 2 At this time, keep the control valves in the fully closed position. 3 4 c) Place the handle Lo in the fully opened position 5, and turn on the vacuum pump’s power switch.
f) After charging liquid refrigerant into the air conditioner by closing the charging valve, stop operation by fully closing the gauge manifold’s valve Lo. 2 5 g) Quickly remove the charge hose from the service port. 6 When stopped halfway, refrigerant being cycled will be released. h) After securing the caps on the service port and control valve, check the caps’ periphery to see if there is any gas leakage.
7.3.6 Refrigerant recharging at servicing When it becomes necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the following steps. (For details, see the instruction manual prepared by the equipment manufacturer) 1) Connect the charge hose to the outdoor unit’s service port. 2) Connect the charge hose to the vacuum pump adapter. At this time, keep the control valves in the fully opened position.
(4) (5) Recovering procedures a) According to the instructions for handling the refrigerant recovering equipment (described in the attached instruction manual), operate the equipment to recover refrigerant. b) During the operation, take care of the following cautions. 1 Ascertain that the refrigerant recovering equipment is running as required and always monitor the state of operation so that adequate steps can be taken in an emergency. 2 During the operation, remain at work site to ensure safety.
b) Charge hose (pressure resistant hose for fluorocarbon) and packing • It is 1/4B in thickness and available in various lengths, etc. • Use a hose whose pressure resisting performance is higher than 5.2 MPa (52 kg/cm2G). • Generally, a setting fixture is provided only on one end. (4) Gauge manifold Hose packing • The most important service tool for refrigeration and air conditioner. Setting fixture • Widely used when charging/recovering R410A while checking gas pressure.
INVERTER WALL MOUNTED TYPE ROOM AIR-CONDITIONER Air-Conditioning & Refrigeration Systems Headquarters 16-5, 2-chome, Kounan, Minato-ku, Tokyo, 108-8215, Japan Fax : (03) 6716-5926 - 2- No.116(1.
