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 . 3 INSTALLATION OF NEW REFRIGERANT AIR CONDITIONER . 20 AIR CONDITIONER OPERATING CONDITIONS . 20 FUNCTIONS TO BE IMPLEMENTED LOCALLY . [. . . ] 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. If nitrogen is not passed through the pipe, the refrigerating cycle may become clogged by oxidized scales. The Ø28. 6 mm pipe cannot be passed through the pipe cover and knockout hole in the base plate so be sure to connect the Ø19. 1 mm pipe and Ø28. 6 mm pipe outside the outdoor unit. · EN 11 Digital Inverter Tightening of Connecting Part 1. Align the centers of the connecting pipes and fully tighten the flare nut with your fingers. Then fix the nut with a wrench as shown in the figure and tighten it with a torque wrench. Half union or packed valve Flare nut · · After the installation work, be sure to check for gas leaks of the pipe connections with nitrogen. Pressure of R410A is higher than that of R22 (Approx. Therefore, using a torque wrench, tighten the flare pipe connecting sections that connect the indoor/outdoor units at the specified tightening torque. If air remains, the capacity may decrease. 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. Liquid side Open the valve with a 4 mm hexagon wrench. 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 pipes separately for the liquid side and gas side. 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. [. . . ] · The rust cannot be removed by cleaning, and new pipes are necessary. Placement location Outdoors Indoors Term 1 month or more Less than 1 month Every time Curing manner Pinching Pinching or taping 24 EN Digital Inverter Are there scratches or dents on the existing pipes?NO Is it possible to operate the existing air conditioner?YES · After the existing air conditioner is operated in cooling mode for approx. [. . . ]