User manual LG A12AWU-UF6

[. . . ] Modular Multi 2 pipe, heat pump and cooling only systems provide an economical solution to many of your heating and cooling needs and when combined with the Super Multi 3 pipe system, Toshiba covers the full spectrum of VRF applications. 5 General Information Benefits of VRF The Variable Refrigerant Flow (VRF) product segment is one of the fastest growing areas of the air conditioning industry due to the inherent flexibility of the system. Specifiers are selecting this type of air conditioning product because it provides the economy and stability of a network system with the versatility of an independent system. The system is ideal for variable load situations such as hotels, offices and shops. VRF systems are compact and discreet which makes them ideal for applications when the air conditioning system is being retro-fitted to the existing building. [. . . ] The design also facilitates servicing, as service engineers can slide the compressor in/out on the tray. The refrigerant control circuit in the outdoor unit is equipped with two parallel pulsed modulating valves. The valves enable precise control of refrigerant volume, maintaining comfort levels, yet saving energy. 72 Outdoor Units Inverter Fixed Fixed Fixed Fixed MAIN PIPE Oil Management System Overview of the 19 Modular Multi System Configurations OUTDOOR SYSTEM CAPACITY Cooling only (no heating) Cooling Heating* INVERTER 28 kW (10 hp) 22. 4 kW (8 hp) MM-A0280CT MM-A0224CT MM-A0280HT MM-A0224HT 28 kW (10 hp) MM-A0280CX A12AWU-UF6 FIXED 22. 4 kW (8 hp) MM-A0224CX MM-A0224HX Total connected code 16 kW (6 hp) MM-A0160CX MM-A0160HX Maximum No. of indoor units Code hp Min Max 22. 4 28. 0 38. 4 44. 8 50. 4 56. 0 60. 8 67. 2 72. 8 78. 4 84. 0 89. 6 95. 2 100. 8 106. 4 112. 0 117. 6 123. 2 128. 8 25. 0 31. 5 43. 0 50. 0 56. 5 63. 0 68. 0 75. 0 81. 5 88. 0 94. 5 100. 0 106. 5 113. 0 119. 5 126. 0 131. 5 138. 0 144. 5 8 10 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 2 3 4 1 2 3 2 3 3 2 1 1 2 2 1 1 1 1 1 13 16 16 18 18 20 22 24 26 28 30 32 34 36 38 40 40 40 40 4 5 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 10. 8 13. 5 18. 9 21. 6 24. 3 27. 0 29. 7 32. 4 35. 1 37. 8 40. 5 43. 2 45. 9 48. 6 51. 3 54. 0 56. 7 59. 4 62. 1 12 * Heating capacities only apply to heat pump systems. By using an inverter unit or linking it with the specified fixed speed units, system capacities from 22. 4 kW to 128. 8 kW are available. The grouped systems closely match the capacity demand for the specific application and are able to adjust for the variations in load. For MMS linked systems, the inverter is always the unit closest to the indoor network and has a capacity equal to or larger than the largest fixed speed unit. The fixed speed units are linked with the largest units closest to the inverter unit. Only the system configurations outlined in the table above are authorised by Toshiba. The 16. 0 kW (6 hp) fixed speed unit is available for the 38. 4 kW (14. 0 hp) and 60. 8 kW (22 hp) only. 73 Outdoor Units Benefits of Linking the Outdoor Units Include: · · · · · Reduced costs with single inverter serving larger capacity system Reduced refrigerant charge versus sum of separate systems Unique Toshiba OMS Oil Management System allows transfer of oil between units System operation can continue during outdoor unit service Reduced riser requirements with single set of main pipes for system Small Riser Space Example for a 84 kW (30 hp) system Mode Priority This outdoor unit is set to operate with the heating mode taking precedence. This priority can be switched between Heat and Cool mode using DIP switch 07 on the outdoor unit interface PCB (MCC-1343-01). 74 Outdoor Units Acoustic Data Sound Power Level Sound Pressure Level SPL NR 58 58 52 52 63 Cooling 10/8/6 hp (28. 0/22. 4/16. 0 kW) Heating 10/8/6 hp (28. 0/22. 4/16. 0 kW) 60. 9 60. 1 125 60. 2 62. 1 250 60. 9 64. 3 500 62. 0 63. 7 1k 63. 4 64. 2 2k 55. 4 56. 6 4k 51. 9 52. 9 8k 44. 7 48. 4 SWL 70 70 Sound Pressure Level 50Hz Heating Cooling 80 NC-60 70 Microphone Position Sound Level (dB) 60 50 40 20 10 NC-50 NC-40 1. 5m NC-30 1m NC-20 63 125 250 500 1000 2000 4000 8000 Frequency (Hz) 12 75 Outdoor Units Toshiba's OMS ­ Oil Management System Advanced Oil Separation Oil is retrieved from the compressor discharge with advanced separator technology. Oil Level Verification Compressor oil levels are continuously monitored. An oil reservoir stores and supplies oil as needed to the compressor. Active Distribution Between Units The balance pipe within the linked outdoor units allows oil to be transferred from one compressor to another. Low Temperature Protection At temperatures below 3°C, hot gas is injected in the compressor to protect against liquid in the oil. Hourly Oil Retrieval from Network Indoor units are flushed once per hour to recover the oil in the network. Inverter Unit Fixed Speed Unit Discharge Oil separator Discharge Oil separator Open 2 in 1 comp. FF II XX Oil reservoir Appropriate oil level Open Oil reservoir Appropriate oil level Open Close Close Oil Transfer 76 Outdoor Units Dimensional Drawing Single Outdoor Unit MM-A0280HT, MM-A0224HT, A12AWU-UF6, MM-A0224HX, MM-A0160HX MM-A0280CT, MM-A0224CT, MM-A0280CX, MM-A0224CX, MM-A0160CX 4-15 x 20 (Slot) Grounding part of bottom plate 100 80 Base (including fixed leg) Fixing bolt pitch 700 990 80 Fixing bolt pitch 100 700 Base Base bolt position 750 1700 1560 90 700 Refrigerant pipe connecting port (Gas side) braze connection (ØA) 245 88 190 235 Fixing bolt pitch 755 790 755 610 630 2-60 x 150 Slot (for transport) 500 Refrigerant pipe connecting port (Liquid side) flare connection (ØB) Balance pipe connecting port flare connection (ØC) Refrigerant pipe connecting port (Gas side) (knock out) 12 Refrigerant pipe (knock out) connecting port 173 (Liquid side) Balance pipe connecting port 145 60 115 (Slot pitch) 140 125 64 Model MM-A0280HT, A12AWU-UF6 MM-A0280CT, MM-A0280CX MM-A0224HT, MM-A0224HX MM-A0224CT, MM-A0224CX MM-A0160CX MM-A0160HX 130 28. 6 22. 2 22. 2 12. 7 12. 7 9. 52 9. 52 20 9. 52 9. 52 65 35 Details of piping connections Note: All dimensions are in mm 77 170 ØA mm ØB mm ØC mm Outdoor Units Dimensional Drawing Two Units Connected MM-A0384HT, MM-A0448HT, MM-A0504HT, MM-A0560HT MM-A0384CT, MM-A0448CT, MM-A0504CT, MM-A0560CT 20 8-15 x 20 (Slot) 750 755 Fixing bolt pitch 700 Fixing bolt pitch 990 1 2 700 Fixing bolt pitch 990 1700 1560 88 700 90 2000 300 (Rear side) 10 500 10 20 (Front side) 2020 No. Name Outdoor Unit (Inverter type) Outdoor Unit (Fixed-speed type) Note: All dimensions are in mm 78 1550 790 (including fixed leg) Outdoor Units Dimensional Drawing Three Units Connected MM-A0608HT, MM-A0672HT, MM-A0728HT, MM-A0784HT, MM-A0840HT MM-A0608CT, MM-A0672CT, MM-A0728CT, MM-A0784CT, MM-A0840CT 20 20 12-15 x 20 (Slot) 750 755 Fixing bolt pitch 790 700 Fixing bolt pitch 990 1 310 700 Fixing bolt pitch 990 2 310 700 Fixing bolt pitch 990 3 1700 1560 88 700 90 (including fixed leg) 12 (Rear side) 300 10 500 10 20 20 (Front side) 3030 No. Name Outdoor Unit (Inverter type) Outdoor Unit (Fixed-speed type 1) Note: All dimensions are in mm Outdoor Unit (Fixed-speed type 2) 1550 79 Outdoor Units Dimensional Drawing Four Units Connected MM-A0896HT, MM-A0952HT, MM-A1008HT, MM-A1064HT, MM-A1120HT MM-A0896CT, MM-A0952CT, MM-A1008CT, MM-A1064CT, MM-A1120CT 20 20 20 16 - 15 x 20 (Slot) 755 Fixing bolt pitch 700 Fixing bolt pitch 990 1 310 700 Fixing bolt pitch 990 2 310 700 Fixing bolt pitch 990 3 310 700 Fixing bolt pitch 990 4 1700 1560 88 700 90 4020 300 (Rear side) 10 500 10 20 20 20 (Front side) 4040 No. Name Outdoor Unit (Inverter type) Outdoor Unit (Fixed-speed type 1) Outdoor Unit (Fixed-speed type 2) Note: All dimensions are in mm Outdoor Unit (Fixed-speed type 3) 80 1550 (including fixed leg) 750 790 Outdoor Units Dimensional Drawing Five Units Connected MM-A1176HT, MM-A1232HT, MM-A1288HT MM-A1176CT, MM-A1232CT, MM-A1288CT 20 20 20 20 20 - 15 x 20 (Slot) 755 Fixing bolt pitch 790 700 Fixing bolt pitch 310 700 Fixing bolt pitch 310 700 Fixing bolt pitch 310 700 Fixing bolt pitch 310 Fixing bolt pitch 700 990 1 2 990 3 990 4 990 5 990 1700 1560 88 700 90 5030 (Rear side) (including fixed leg) 700 12 1550 10 300 500 10 20 20 20 20 (Front side) 5050 No. Name Outdoor Unit (Inverter type) Outdoor Unit (Fixed-speed type 1) Outdoor Unit (Fixed-speed type 2) Outdoor Unit (Fixed-speed type 3) Note: All dimensions are in mm Outdoor Unit (Fixed-speed type 4) 81 Outdoor Units Access and Air Flow to Outdoor Units If the Outer Wall is Higher than the Outdoor Unit If a hole can be made in the wall: 600 300 (Front side) 10 20 20 20 20 1. 3. Set an aperture ratio so that suction air volume Vs from the hole becomes 1. 5 m/s or less Height of discharge duct: HD = H - h Pressure drop of discharge duct to be 15 Pa maximum H h HD Discharge duct If a hole cannot be made: Hole in wall 600 300 (Front side) 10 20 20 20 20 1. For piping material and size of the refrigerant pipes, refer to the Installation Manual of the air conditioner. Parts Note: 1. In the following tables, ( ) indicates diameter of the indicated position, and others indicate the diameter of the connecting pipe. Please connect pipe to the side with a projection of the socket. (a - j: without projection) Projection Diameter of connecting pipe socket Branching header model Branching pipe gas side RBM-H4037SK ø 19. 2 RBM-H8037SK ø 19. 2 1 pc ø 28. 7 ø 28. 7 ø 9. 6 1 pc Branching pipe liquid side ø 9. 6 1 pc ø 19. 2 ø 19. 2 1 pc Heat insulator (gas side/liquid side) Socket Diameter of connecting pipe 1 pc each Gas side No. ø 15. 9 x (ø 28. 6) 1 pc ø 19. 1 x (ø 28. 6) 1 pc ø 22. 2 x (ø 28. 6) 1 pc ø 9. 5 x (ø19. 0) 1 pc ø 12. 7 x (ø19. 0) 1 pc ø 15. 9 x (ø19. 0) 1 pc No. ø 12. 7 x (ø 19. 0) 4 pcs ø 15. 9 x (ø 19. 0) 4 pcs No. ø 19. 1 x (ø 28. 6) 1 pc ø 22. 2 x (ø 28. 6) 1 pc 1 pc each ^ ) e Liquid side No. 0 # No. ) e No. 0 # No. ø 12. 7 x (ø 19. 0) 8 pcs ø 15. 9 x (ø 19. 0) 8 pcs External diameter of socket 7 0 # 1 ø 6. 4 x (ø 9. 5) 4 pcs 7 0 # ø 9. 5 x (ø19. 0) 1 pc ø 12. 7 x (ø19. 0) 1 pc ø 15. 9 x (ø19. 0) 1 pc 1 ø 6. 4 x (ø 9. 5) 8 pcs Outlet sealed pipe at gas side Header sealed pipe at gas side Outlet sealed pipe at liquid side Inlet socket at liquid side (ø 19) 1 pc (ø 19) 1 pc (ø 9. 5) 1 pc (ø 19) 3 pcs (ø 19) 1 pc (ø 9. 5) 3 pcs s ø 22. 2 x (ø19. 0) 1 pc s ø 22. 2 x (ø19. 0) 1 pc Branching header model Branching pipe gas side RBM-H4071SK ø 19. 2 RBM-H8071SK ø 19. 2 1 pc ø 38. 3 ø 38. 3 ø 9. 6 1 pc Branching pipe liquid side ø 9. 6 1 pc ø 19. 2 ø 19. 2 1 pc Heat insulator (gas side/liquid side) Socket Diameter of connecting pipe 1 pc each Gas side No. ø 34. 9 x (ø 38. 1) 1 pc ø 41. 3 x (ø 38. 1) 1 pc ø 9. 5 x (ø19. 0) 1 pc ø 12. 7 x (ø19. 0) 1 pc ø 15. 9 x (ø19. 0) 1 pc No. ø 12. 7 x (ø 19. 0) 2 pcs ø 15. 9 x (ø 19. 0) 4 pcs ø 6. 4 x (ø 9. 5) 4 pcs No. ø 34. 9 x (ø 38. 1) 1 pc ø 41. 3 x (ø 38. 1) 1 pc ø 9. 5 x (ø19. 0) 1 pc ø 12. 7 x (ø19. 0) 1 pc ø 15. 9 x (ø19. 0) 1 pc 1 pc each z x Liquid side External diameter of socket 0 # No. z x No. 0 # No. ø 12. 7 x (ø 19. 0) 8 pcs ø 15. 9 x (ø 19. 0) 8 pcs ø 6. 4 x (ø 9. 5) 8 pcs No. 7 0 # 1 7 0 # 1 Outlet sealed pipe at gas side Header sealed pipe at gas side Outlet sealed pipe at liquid side Inlet socket at liquid side -- (ø 19) 1 pc (ø 19) 1 pc (ø 9. 5) 1 pc -- (ø 19) 3 pcs (ø 19) 1 pc (ø 9. 5) 3 pcs 92 Refrigerant Piping Design Installation instruction branching header/branching joint Branching joint model Branching pipe gas side ø 19. 2 ø 16 RBM-Y018SK ø 16 RBM-Y037SK ø 25. 5 1 pc ø 9. 6 ø 28. 7 ø 25. 5 ø 12. 8 ø 12. 8 ø 12. 8 1 pc Branching pipe liquid side ø 9. 6 1 pc ø 9. 6 1 pc Heat insulator (gas side/liquid side) Socket Diameter of connecting pipe 1 pc each Gas side No. ø 19. 1 x (ø 15. 9) 1 pc ø 22. 2 x (ø 19. 0) 1 pc No. [. . . ] use MM-A0280HT (Code 10, Rated cooling capacity 28 kW) Checks: Check 1: Result: Will the selected outdoor unit provide enough cooling?Rated capacity of outdoor unit x Correction factor = 28. 0 kW x 0. 92 = 26 kW Corrected capacity of outdoor unit does not provide enough capacity Use Overload Factor (From the table in chapter 11) Note: (max overload = 135%) Overload factor = (Total code of Indoor Units)/(Outdoor Unit code) = 12/10 = 120% For overload factor of 120%, Outdoor unit will provide 108% of its rated capacity = 1. 08 x 28 kW = 30. 24 kW Subject to system correction factor = 30. 24 kW x 0. 92 = 28 kW Therefore, the condenser will provide adequate cooling capacity. select MM-A0280HT (Code 10, Rated cooling capacity 28 kW). Calculating the performance of an indoor unit during peak load When the actual load requirement is greater that the available output (i. e. total indoor duty required: Capacity of outdoor unit, is greater than 1:1), the performance change in the indoor unit may be calculated using the instructions described in chapter 11. [. . . ]