User manual TOSHIBA MCY-MAP0501HT INSTALLATION MANUAL

[. . . ] E06-211 INSTALLATION BOOK R410A WARNINGS ON REFRIGERANT LEAKAGE Refrigerant density limit Important The room in which the air conditioner is to be installed should be designed or chosen such that in the event of a refrigerant gas leak the density of gas should not exceed a set limit. The refrigerant R-410A, which is used in the air conditioner product, is intrinsically safe without the toxicity or combustibility of ammonia. R-410A is environmentally friendly and is not restricted by current or pending laws intended to protect the ozone layer. Risk of suffocation through leakage of R-410A is minimal. However, with the recent increase in the number of high density buildings and use of multi air conditioner systems to ensure effective use of floor space, energy conservation and individual control, installers should ensure it is not possible to exceed density limits in the event of a refrigerant leak. In particular, where a single unit of the multi conditioner system is to be installed into a small room, select a suitable model and installation procedure so that if refrigerant leaks out, density limits are not exceeded. [. . . ] Cut the pipe with a pipe cutter. · Projection margin in flaring : B (Unit : mm) Rigid (Clutch type) Outer dia. of copper pipe Warp B R410A tool used R410A R22 Conventional tool used R410A R22 0. 5 to 1. 0 0. 5 to 1. 0 OK 90° NO GOOD Obliquity Roughness 9. 5 15. 9 0 to 0. 5 (Same as left) 1. 0 to 1. 5 0 to 0. 5 (Same as left) 1. 0 to 1. 5 2. Insert a flare nut into the pipe, and flare the pipe. 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 projection margin of the copper pipe. Imperial (Wing nut type) Outer dia. of copper pipe 9. 5 15. 9 R410A 1. 5 to 2. 0 2. 0 to 2. 5 R22 1. 0 to 1. 5 1. 5 to 2. 0 3-22 Tightening of connecting part (Unit: N·m) Outer dia. of copper pipe 9. 5 mm (diam. ) 15. 9 mm (diam. ) Tightening torque 33 to 42 (3. 3 to 4. 2 kgf·m) 68 to 82 (6. 8 to 8. 2 kgf·m) REQUIREMENT 1. If applying excessive torque, the nut may be broken according to some installation conditions. · After the installation work, be sure to check gas leak of connecting part of the pipes with nitrogen. · Align the centers of the connecting pipes and tighten the flare nut strong as far as possible with your fingers. Then fix the nut with a spanner and tighten it with torque wrench as shown in the figure. Half union or packed valve Flare nut NO GOOD Cover Externally threaded side Internally threaded side Fix with spanner. Tighten with torque wrench. · As shown in the figure, be sure to use a double spanner to loosen or tighten the flare nut of the valve at gas side. If using a single spanner, the nut cannot be tightened with necessary tightening torque. On the contrary, use a single spanner to loosen or tighten the flare nut of the valve at liquid side. Cover · Pressure of R410A is higher than that of R22 (Approx. Therefore, using a torque wrench, tighten the flare pipe connecting sections which connect the indoor/outdoor units at the specified tightening torque. Incomplete connections may cause not only a gas leak, but also a trouble of the refrigeration cycle. Cap Piping valve Do not apply refrigerating machine oil to the flared surface. Loosened Tightened Flare nut Valve at gas side 3-23 Pipe connecting method of valve at gas side Outdoor unit capacity type 0401 type 0501 type Gas pipe diameter Ø15. 9 Pipe connecting method of valve at gas side Connect Ø15. 9 pipe with flaring. Flare connection Ball valve of gas side Ø15. 9 Gas pipe Ø15. 9 (Local supply) 0601 type Ø19. 1 For braze connection of Ø19. 1 gas pipe, refer to the following method. Form the pipe so that the end part of the pipe will be out from the outdoor unit along the taking-out direction of the pipe. The Ø15. 9 gas pipe to be supplied locally. Using the joint socket (Accessory), connect with braze Ø15. 9 gas pipe and Ø19. 1 gas pipe at outside of the outdoor unit. After connecting the pipes, apply thermal insulation process to the gas pipe until near the valve. Ball valve of gas side Ø15. 9 Flare connection Gas pipe Ø15. 9 (Local supply) Gas pipe Ø19. 1 (Local supply) Joint socket (Accessory) Braze connection (Aconnect with braze) 3-24 3-15. Leak test Airtight test After the refrigerant piping has finished, execute an airtight test. For an airtight test, connect a nitrogen gas bomb as shown in the figure below, and apply pressure. · Be sure to apply pressure from the service ports of the packed valves (or ball valves) at liquid side, discharge gas side, and suction gas side. · An air tight test can be only performed to the service ports at liquid side, discharge gas side, and suction gas side of the outdoor unit. [. . . ] Is the relay connector between U1/U2 terminal and U3/U4 terminal removed?(Set up at shipment from the factory) Is the end terminal of the shield cable grounded? Check Note) The above figure does not show all the electric cables. 10-1 2. In case that a central control system is connected (Before address setup) Central control units U1 U2 U3 U4 3 2 Other refrigerant line Other refrigerant line U3 U4 Outdoor unit U3 U4 Outdoor unit U1 U2 U5 U6 1 U1 U2 Earth To indoor unit Power Supply Single phase 220V-240V , 50Hz 220V , 60Hz 4 Main switch U1 U2 U1 U2 U1 U2 U1 U2 Indoor unit AB AB AB AB Single phase 220V-240V , 50Hz 220V , 60Hz Leak interception Remote Main switch controller Remote controller Remote controller No. Main check items Are indoor and outdoor communication lines connected to U1/U2 terminals?Is the relay connector between U1/U2 terminal and U3/U4 terminal removed? [. . . ]