Your Climate. We're There. R407C Air Cooled Condensing Unit Models: M4LC M4LC M4LC M4LC M4LC M4LC M4LC 010B/BR 015B/BR 020B/BR 025B/BR 030C/CR 040C/CR 050C/CR IMPORTANT This air conditioners use new refrigerant R407C. Please refer to “Special Precautions” when dealing with refrigerant R407C unit.
Contents Introduction To Refrigerant R407C .....................................................................................2 Specifications ......................................................................................................................3 Outlines And Dimensions ...............................................................................................4 - 5 Wiring Diagrams ..........................................................................................................
Introduction To Refrigerant R407C Environmental friendly The Montreal Protocol regulation calls for the phase-out of HCFCs by the year 2030 to prevent the ozone layer from further depletion. R407C is an environment friendly refrigerant to replace R22. The operating characteristics of R407C system bears close similarity to that of R22. R407C thermophysical properties such as pressure-temperature behavior, and heat-transfer characteristic are somewhat similar to the properties of R22.
Specifications Cooling Only COIL FIN PIPE OUTDOOR UNIT TUBE FAN COMP MODEL OUTDOOR UNIT NOMINAL COOLING CAPACITY REFRIGERANT / CONTROL POWER SOURCE COMPRESSOR TYPE CAPACITOR RATED RUNNING CURRENT RATED INPUT POWER PROTECTION DEVICE FAN TYPE / DRIVE BLADE MATERIAL DIAMETER RATED RUNNING CURRENT RATED INPUT POWER MATERIAL DIAMETER THICKNESS MATERIAL THICKNESS ROW FIN PER INCH FACE AREA HEIGHT DIMENSION WIDTH DEPTH WEIGHT MATERIAL CASING THICKNESS FINISHING TYPE SIZE LIQUID GAS PACKING HEIGHT DIMENSION
Outlines And Dimensions Model : M4LC 010B/015B, 010BR/015BR All dimensions in mm Model : M4LC 030/040/050C, M4LC 030/040/050CR All dimensions in mm 4
MODEL : M4LC 030/040/050C, M4LC 030/040/050CR All dimensions in mm Caution Sharp edges and coil surfaces may cause injury. Wear protective gloves when handling the unit.
Wiring Diagrams Model : M4LC 010B/015B Model : M4LC 010BR/015BR 6
Model : M4LC 020B/025B Model : M4LC 020BR/025BR 7
Model : M4LC 030C Model : M4LC 030CR 8
Model : M4LC 040C/050C Model : M4LC 040CR/050CR 9
Special precautions when dealing with refrigerant R407C unit 1) What is new refrigerant R407C? R407C is a zeotropic refrigerant mixture which has zero ozone depletion potential and thus conformed to the Montreal Protocol regulation. It requires Polyol ester oil (POE) oil for its compressor's lubricant. Its refrigerant capacity and performance are about the same as the refrigerant R22.
c) Ensure that the compressor is not expose to open air for more than the recommended time specified by its manufacturer (typically less than 10 minutes). Removed the seal-plugs only when the compressor is about to be brazed. d) The system should be thoroughly vacuumed to 1.0 Pa (-700mmHg) or lower. This vacuuming level is more stringent than R22 system so as to ensure no incompressible gas and moisture in the system.
Installation Caution Sharp edges and coil surface are potential injury hazard. Avoid from contact with them. (1) Installation of indoor unit For installation of indoor unit, please refer to the indoor unit technical manual. (2) Installation of outdoor unit As condensing temperature rises, evaporating temperature rises and cooling capacity drops.
Installation clearance • Outdoor units must be installed such that there is no short circuit of the hot discharge air or obstruction to smooth air flow. Select the coolest possible place where intake air should not be hotter than the outside temperature (max. 45°C) A B C D Series I Minimum Distance 150 mm 1,000 mm 150 mm 500 mm Series II 300 mm 1,000 mm 300 mm 500 mm (3) Refrigerant piping Caution Must install a molecular-sieve type filter dryer along the liquid line.
(4) Wiring Electrical connections • Wiring regulations on wire diameters differ from country to country. Please refer to your LOCAL ELECTRICAL CODES for field wiring rules. Be sure that installation comply with such rules and regulations. General precautions • Ensure that the rated voltage of the unit corresponds to the name plate before carrying out proper wiring according to the wiring diagram. • Provide a power outlet to be used exclusively for each unit.
Caution R407C must be charged as liquid. Usually R407C cylinder is equipped with a dip-pipe for liquid withdrawal. If there is no dip-pipe, the cylinder should be inverted so as to withdraw liquid R407C from the valve. Caution Do not top-up when servicing leak, as this will reduce the unit performance. Vacuum the unit thoroughly and then charge the unit with fresh R407C according to the amount recommended in the specification.
Caution Avoid prolong exposure of an opened compressor, or the internal part of refrigerant piping to moist air. The POE oil in the compressor and piping can absorb moisture from air. (7) Overall checking • Ensure the following, in particular : 1) The unit is mounted solidly and rigid in position. 2) Piping and connections are leak proof after charging. 3) Proper wiring has been done. • Drainage check - pour some water into drain pan.
Servicing And Maintenance Caution Disconnect from Main Supply before Servicing the air conditioner The unit is designed to give a long life operation with minimum maintenance required. However, it should be regularly checked and the following items should be given due attention. Components Air Filters (Indoor unit) Maintenance Procedure 1. Clean with a vacuum cleaner, or by tapping lightly on any hard surface and then washing in lukewarm water (below 40°C) With neutral soap.
Pre-start up maintenance (after extended shutdown) - Inspect thoroughly and clean indoor and outdoor units. Clean or replace air filters. Clean condensate drain line. Clean clogged indoor and outdoor coils. Check fan imbalance before operation. Tighten all wiring connections and panels. Check for refrigerant leakage The design of the outdoor series allows servicing to be carried out readily and easily. The removal of the top side, front and back panel make almost every part accessible.
Troubleshooting When any air-conditioner malfunction is noted, immediately switch off the power supply to the unit, and contact the local dealer, if necessary. Some simple troubleshooting tips are given below : Fault Cause 1. Fan does not work 3 minutes • Protection against the frequent starting. Wait 3 or 4 minutes. after starting 2. The air conditioning unit does not • work • • • Power failure or you must be replaced the fuse. The power plug is disconnected.
For cooling only models or heat pump models (cooling cycle) Diagnosis by flow chart The following chart are efficient checking procedures for troubleshooting when these fan-coil units, are coupled with the condensing units using standard wiring. For dual circuited models, perform the procedures for each circuit.
Insufficient Cooling Insufficient Cooling Compressor Cycling Cycling On Dual Pressure Switch Tripping High Discharge Pressure or Low Suction Pressure Clogged Capillary or Pressure Switch Switch Faulty Running Overcurrent Relay For Compressor Tripping High Voltage or Low Voltage Single-Phase High Discharge Pressure And High Suction Pressure Loose Connections Discharge Gas Thermostat or Internal Thermostat Tripping High Discharge Pressure And Low Suction Pressure Refrigerant Short Charge or Refrig
High Suction Pressure High Suction Pressure Low Evaporator Air Inlet Temperature Excessive Fresh Air Intake Reduce The Fresh Air Intake Insufficient Duct Insulation Reinforce The Duct Insulation Defective Compressor Valve Overcharged Refrigerant Change Or Repair The Compressor Purge The Refrigerant Low Suction Pressure Low Suction Pressure Evaporator Air Flow Restricted Evaporator Air Inlet Temperature Clogged Air Filter Low Clean The Air Filter Restricted Duct Remove The Restriction Low F
For Heat Pump Models By means of pressure readings : Pressure Probable Cause High Side Low Side 1. 2. 3. 4. = = High Side Low Side High Side Low Side Too High A Little High Normal Circuit A Little Low Too Low Data 1. Poor compression/no compression (compressor defective.) 2. Check valve stick in open position. 3. Reversing valve leaking. 1. Undercharged with refrigerant. 2. Refrigerant leakage. 3. Air filter clogged/dirty (indoor unit). 4. Indoor fan locked.(cooling) 5.
The most common causes of air conditioner failure to “start" are:a) Voltage not within ±10% of rated voltage. b) Power supply interrupted. c) Control settings improper. d) Air conditioner is disconnected from main power source. e) Fuse blown or circuit breaker off. II) Diagnosis of refrigerant circuit / application There might be some cases where the unit starts running but does not perform satisfactory, i.e. insufficient cooling.
Parts List Model : M4LC 010B/015B/020B/025B 1. BACK PANEL 16. ROTARY COMPRESSOR 2. TOP PANEL 17. RUBBER GROMMET 3. CONDENSER COIL ASSY. 18. COMPRESSOR NUT 4. FAN MOTOR BRACKET 19. BASE PAN ASSY. 5. FAN MOTOR 20. CAPILLARY TUBE ASSY. 6. FLINGER 21. PARTITION 7. RING WASHER 22. TERMINAL BOX PANEL ASSY. 8. FAN BLADE 23. SIDE PANEL 9. SQUARE WASHER 24. ACCESS PANEL 10. HEX NUT 25. FLARE VALVE MOUNTING PLATE 11. BLACK LABEL 26. SUCTION VALVE (5/8”) 12. FRONT PANEL 27. LIQUID VALVE 13.
Model : M4LC 010BR/015BR/020BR/025BR 1. BACK PANEL 16. ROTARY COMPRESSOR 2. TOP PANEL 17. RUBBER GROMMET 3. CONDENSER COIL ASSY. 18. COMPRESSOR NUT 4. FAN MOTOR BRACKET 19. BASE PAN ASSY. 5. FAN MOTOR 20. CAPILLARY TUBE ASSY. 6. FLINGER 21. PARTITION 7. RING WASHER 22. TERMINAL BOX PANEL ASSY. 8. FAN BLADE 23. SIDE PANEL 9. SQUARE WASHER 24. ACCESS PANEL 10. HEX NUT 25. FLARE VALVE MOUNTING PLATE 11. BLACK LABEL 26. SUCTION VALVE (5/8”) 12. FRONT PANEL 27. LIQUID VALVE 13.
Model : M4LC 030C/040C/050C 1. ASSY. BASE PAN 10. BACK RIGHT PANEL 2. SUCTION VALVE 11. TOP PANEL 3. LIQUID VALVE 12. CONDENSER COIL ASSY. 4. PARTITION PANEL 13. MOTOR BRACKET 5. CRANKCASE HEATER 14. SIDE LEFT PANEL 6. COMPRESSOR ASSY. 15. FAN MOTOR ASSY. 7. SERVICE PANEL 16. FAN BLADE 8. TERMINAL BOARD MAIN ASSY. 17. FRONT PANEL ASSY. 9.
Model : M4LC 030CR/040CR/050CR 1. ASSY. BASE PAN 11. 4 WAY VALVE ASSY. 2. SUCTION VALVE 12. BACK RIGHT PANEL 3. LIQUID VALVE 13. DEFROST SENSOR AND CLIP 4. PARTITION PANEL 14. TOP PANEL 5. CRANKCASE HEATER 15. CONDENSER COIL ASSY. 6. COMPRESSOR ASSY. 16. MOTOR BRACKET 7. TXV ASSY. 17. SIDE LEFT PANEL 8. SERVICE PANEL 18. FAN MOTOR ASSY. 9. TERMINAL BOARD MAIN ASSY. 19. FAN BLADE 10. ACCUMULATOR 20. FRONT PANEL ASSY.
DOP: 042000 Americas - 13600 Industrial Park Boulevard, P.O. Box 1551, Minneapolis, MINI 55440 USA (612) 553-5330 Asia - Jalan Pengapit 15/19, P.O.
