User manual TOSHIBA RAV-242A8-PE SERVICE MANUAL

[. . . ] Ssc (*1) Model RAV-SM2244AT8(Z)(ZG)-E RAV-SM2804AT8(Z)(ZG)-E Ssc (MVA) 1. 41 1. 72 Contents 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ACCESSORY PARTS . 24 EN 1 Digital Inverter 1 ACCESSORY PARTS Accessory Parts Part name Installation manual Q'ty 1 Shape Usage (Hand this directly to the customer. ) Drain nipple Waterproof rubber cap Protective bush 1 1 1 For protecting wires (pipe cover) Guard material for passage part 1 For protecting passage part (pipe cover) Clamp filter 1 For conforming to EMC standards (Used for power wire) For the pipe inside the outdoor unit For connecting the pipe Ø19. 1 mm pipe Joint (Ø19. 1 ­ Ø25. 4 mm) 1 1 Joint (Ø25. 4 ­ Ø28. 6 mm) 1 For connecting the pipe Elbow 1 For connecting the pipe INFORMATION · · · · · · The main pipe on the gas side of this outdoor unit has a diameter of Ø28. 6 mm, but a Ø19. 1 mm flare connection is used where the valve is connected. Be sure to use the Ø19. 1 mm pipe and joint provided as accessories for the pipe connection. Before installing the unit, check that the unit has the correct model name to prevent the wrong unit from being installed in the wrong place. [. . . ] As the flaring sizes of R410A differ from those of refrigerant R22, the flare tools newly manufactured for R410A are recommended. However, the conventional tools can be used by adjusting the projection margin of the copper pipe. Projection margin in flaring: B (Unit: mm) B Connecting the Gas Side Pipe REQUIREMENT · Be sure to use the Ø19. 1 mm pipe and joint provided as accessories of the outdoor unit to connect the gas side Ø19. 1 mm pipe and Ø28. 6 mm pipe. When leading out the pipes toward the front, to one of the sides or toward the rear, use the Ø19. 1 mm pipe and elbow provided as accessories of the outdoor unit, and adjust the bending direction. Cut the Ø19. 1 mm pipe to the required length before using it. · 1. Align the provided Ø19. 1 mm pipe with the pipe lead-out direction, and shape it so that its end comes out from the outdoor unit. On the outside of the outdoor unit, use the provided joints, and braze the Ø19. 1 mm pipe and Ø28. 6 mm pipe. Rigid (Clutch type) Outer diam. of copper pipe 9. 5 12. 7 15. 9 19. 1 Flaring diameter size: A (Unit: mm) A Ø19. 1 mm pipe (accessory) Ø28. 6 mm pipe (procured locally) Ø19. 1 mm pipe (accessory) : Brazing R410A tool used R410A Conventional tool used 0 to 0. 5 1. 0 to 1. 5 Joint (accessory) Joint (accessory) Outer diam. of copper pipe 9. 5 12. 7 15. 9 19. 1 * A +0 ­0. 4 13. 2 16. 6 19. 7 24. 0 Elbow (accessory) Ø19. 1 mm pipe (accessory) Ø19. 1 mm pipe (accessory) Brazing In case of flaring for R410A with the conventional flare tool, pull the tool out approx. 0. 5 mm more than that for R22 to adjust it to the specified flare size. The copper pipe gauge is useful for adjusting the projection margin size. REQUIREMENT · Before proceeding to weld the refrigerant pipe, be sure to pass nitrogen through the pipe to prevent oxidation inside it. · Do not discharge the refrigerant gas to the atmosphere to preserve the terrestrial environment. · Use a vacuum pump to discharge the air (nitrogen, etc. ) that remains in the set. For the vacuum pump, be sure to use one with a backflow preventer so that the oil in the pump does not backflow into the pipe of the air conditioner when the pump stops. (If oil in the vacuum pump is put in an air conditioner including R410A, it may cause trouble with the refrigeration cycle. ) Compound pressure gauge ­101 kPa (­76 cmHg) Handle Low Charge hose (For R410A only) Pressure gauge Gauge manifold valve Handle High (Keep fully closed) Charge hose (For R410A only) Vacuum pump adapter for counter-flow prevention (For R410A only) Vacuum pump Charge port (Valve core (Setting pin)) Packed valve at gas side *2 Use the vacuum pump, vacuum pump adapter, and gauge manifold correctly referring to the manuals supplied with each tool before using them. Check that the vacuum pump oil is filled up to the specified line of the oil gauge. When air is not charged, check again whether the connecting port of the discharge hose, which has a projection to push the valve core, is firmly connected to the charge port. 14 EN Digital Inverter How to Open the Valve Open or close the valve. Gas side Valve unit Insulating the Pipes · The temperatures at both the liquid side and gas side will be low during cooling so in order to prevent condensation, be sure to insulate the pipes at both of these sides. Insulate the branch pipes by following the instructions in the installation manual provided with the branch pipe kit. Use the insulating material provided as an accessory to insulate the Ø19. 1 mm pipe at the gas side. Seal the area where the Ø19. 1 mm pipe and Ø22. 2 to Ø28. 6 mm pipe are connected so that no gaps are left. · · · · Using a minus screwdriver, turn it counterclockwise by 90° until it hits the stopper. (Full open) Charge port REQUIREMENT Be sure to use an insulating material which can withstand temperatures above 120°C for the gas side pipe since this pipe will become very hot during heating operations. Flare nut Replenishing Refrigerant Handle position Closed completely Opened fully This model is a 30 m chargeless type that does not need to have its refrigerant replenished for refrigerant pipes up to 30 m. [. . . ] · There is the possibility of rain water or air, including moisture, entering the pipe. When refrigerant cannot be recovered · There is the possibility that a large quantity of dirty oil or moisture remains inside the pipes. When a commercially available dryer is attached to the existing pipes · There is the possibility that copper green rust has been generated. Curing of pipes When removing and opening the indoor or outdoor unit for a long time, cure the pipes as follows: · Otherwise rust may be generated when moisture or foreign matter due to condensation enters the pipes. · The rust cannot be removed by cleaning, and new pipes are necessary. [. . . ]