User manual TOSHIBA RAV-SM2804AT7 INSTALLATION MANUAL

[. . . ] AIR CONDITIONER (SPLIT TYPE) Installation manual Outdoor Unit Model name: RAV-SM2244AT7 RAV-SM2244AT7Z RAV-SM2244AT7ZG RAV-SM2244AT8-E RAV-SM2244AT8Z-E RAV-SM2244AT8ZG-E RAV-SM2804AT7 RAV-SM2804AT7Z RAV-SM2804AT7ZG RAV-SM2804AT8-E RAV-SM2804AT8Z-E RAV-SM2804AT8ZG-E English EN Digital Inverter Please read this Installation Manual carefully before installing the Air Conditioner. · This Manual describes the installation method of the outdoor unit. · For installation of the indoor unit, follow the Installation Manual attached to the indoor unit. ADOPTION OF NEW REFRIGERANT This Air Conditioner is a new type that has adopted a new refrigerant HFC (R410A) instead of the conventional refrigerant R22 in order to prevent destruction of the ozone layer. This equipment complies with IEC 61000-3-12 provided that the short-circuit power Ssc is greater than or equal to Ssc (*1) at the interface point between the user's supply and the public system. It is the responsibility of the installer or user of the equipment to ensure, by consultation with the distribution network operator if necessary, that the equipment is connected only to a supply with a short-circuit power Ssc greater than or equal to Ssc (*1). [. . . ] 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. Incomplete connections may cause not only a gas leak, but also trouble with the refrigeration cycle. Do not apply refrigerant oil to the flared surface. Externally threaded side Fix with wrench. Internally threaded side Tighten with torque wrench. Branch Pipe Carry out the refrigerant piping work using the branch pipe kit which is purchased separately. 2. As shown in the figure, be sure to use two wrenches to loosen or tighten the flare nut of the valve on the gas side. If you use a single crescent, the flare nut cannot be tightened to the required tightening torque. On the other hand, use a single crescent to loosen or tighten the flare nut of the valve on the liquid side. of copper pipe 9. 5 mm (diam. ) 12. 7 mm (diam. ) 15. 9 mm (diam. ) 19. 1 mm (diam. ) Tightening torque 33 to 42 (3. 3 to 4. 2 kgf·m) 50 to 62 (5. 0 to 6. 2 kgf·m) 68 to 82 (6. 8 to 8. 2 kgf·m) 100 to 120 (10. 0 to 12 kgf·m) Cover Branch pipe installation The ends of the branch pipes form a line perpendicular to the ground. Both the collecting pipe and branch pipes form a line parallel to the ground. The ends of the branch pipes form a line perpendicular to the ground. Both the collecting pipe and branch pipes form a line parallel to the ground. Branch pipe Collecting pipe Branch pipe Collection area Liquid side Cap Gas side Piping valve Loosened NO GOOD Inclined Make sure that the pipes are installed level after branching. Tightened Flare nut Valve at gas side Length of straight sections on main pipe side of branch pipe Provide a straight section with a length of at least 500 mm on the main pipe side of the branch pipe. (Same for both liquid side and gas side) CAUTION 1. Do not put the crescent wrench on the cap or cover. If applying excessive torque, the nut may break according to some installation conditions. Cover 500 mm or more 500 mm or more NO GOOD Cap 12 EN Digital Inverter Refrigerant Pipe Length Simultaneous twin, triple Total length · 1+ 2 · 1+ 3 · 1+ 4 Maximum 70 70 Allowable pipe length (m) Branch piping Branch piping ·2 · 3­ 2 ·3 · 4­ 2 ·4 · 4­ 3 Maximum Maximum 20 10 20 10 Pipe diameter (mm) Main pipe Gas side Ø28. 6 Ø28. 6 Liquid side Ø12. 7 Ø12. 7 Branch piping Gas side Liquid side Ø15. 9 Ø9. 5 Ø15. 9 Ø9. 5 Figure of Simultaneous triple Indoor Unit Indoor Unit Indoor Unit Height difference (m) Indoor-outdoor H Indoor unit: Upper 30 30 Outdoor unit: Upper 30 30 Indoor-indoor (h) 0. 5 0. 5 Number of bent portions 10 or less 10 or less Outdoor unit SM2244 SM2804 Outdoor unit SM2244 SM2804 Figure of Simultaneous twin Indoor Unit Indoor Unit Outdoor Unit 2 3 Outdoor Unit 4 1 1 Simultaneous double twin Allowable pipe length (m) Branch piping Branch Branch · ( 4 + 2) ­ ( 5 + piping piping · ( 4 + 2) ­ ( 6 + ·4 · 4+ 2 · ( 4 + 2) ­ ( 7 + ·5 · 5+ 2 · ( 5 + 2) ­ ( 6 + ·6 · 6+ 3 · ( 5 + 2) ­ ( 7 + ·7 · 7+ 3 · ( 6 + 3) ­ ( 7 + Maximum Maximum Maximum 15 20 6 15 20 6 Pipe diameter (mm) Main pipe Gas side Ø28. 6 Ø28. 6 Liquid side Ø12. 7 Ø12. 7 Branch piping Gas side Liquid side 2, 3: Ø15. 9 2, 3: Ø9. 5 4, 5, 6, 7: Ø12. 7 4, 5, 6, 7: Ø6. 4 2 to 7: Ø15. 9 2 to 7: Ø9. 5 Indoor Unit H 2 3 Height difference (m) Indoor-outdoor H 2) 3) 3) 3) 3) 3) Indoorindoor (h) Outdoor unit Total length · 1+ 2+ · 1+ 2+ · 1+ 3+ · 1+ 3+ Maximum 70 70 4 5 6 7 Indoor unit: Upper Outdoor unit: Upper SM2244 SM2804 Outdoor unit SM2244 SM2804 30 30 30 30 H 0. 5 0. 5 Number of bent portions 10 or less 10 or less Figure of Simultaneous double twin Indoor Unit Indoor Unit Indoor Unit Outdoor Unit 4 5 6 7 2 3 1 EN 13 H Digital Inverter 6 AIR PURGING Airtight Test Before starting an airtight test, further tighten the spindle valves on the gas side and liquid side. Pressurize the pipe with nitrogen gas charged from the service port to the design pressure (4. 15 MPa) to conduct the airtight test. After the airtight test is completed, evacuate the nitrogen gas. Vacuum pump As shown in the figure, connect the charge hose after the manifold valve is closed completely. Attach the connecting port of the charge hose with a projection to push the valve core (setting pin) to the charge port of the set. (*1) Loosen the flare nut of the packed valve (Gas side) a little to check that the air passes through. Execute vacuuming until the compound pressure gauge indicates ­101 kPa (­76 cmHg). Leave the vacuum pump as it is for 1 or 2 minutes, and check that the indicator of the compound pressure gauge does not return. Open the valve stem or valve handle fully. (First, at liquid side, then gas side) Disconnect the charge hose from the charge port. Tighten the valve and caps of the charge port securely. *1 Air Purge With respect to the preservation of the terrestrial environment, adopt "Vacuum pump" to purge air (Evacuate air in the connecting pipes) when installing the unit. [. . . ] 30 minutes or longer, * recover the refrigerant. · For cleaning the pipes and recovering oil · Refrigerant recovery: Refrigerant recovery equipment YES Existing pipes: Cannot be used. · Use new pipes. NO Nitrogen gas pressure 0. 5 MPa · Remove the existing air conditioner from the piping and carry out flushing (nitrogen pressure 0. 5 MPa) to remove any remains inside of the pipe. Note] In case of twin pipes, also be sure to flush the branching pipe. [. . . ]