Haier 1U25S2SQ1FA [22/54] Read before installation

Haier 1U25S2SQ1FA [22/54] Read before installation
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Содержание

Read Before Installation Air Tightness Test No changes from the conventional method Note that a refrigerant leakage detector for R22 or R41OA cannot detect R32 Halide torch R22 or R407C leakage detector Items to be strictly observed 1 Pressurize the equipment with nitrogen up to the design pressure and then judge the equipment s air tightness taking temperature variations into account 2 When investigating leakage locations using a refrigerant be sure to use R32 3 Ensurethat R32 is in a liquid state when charging English Reasons 1 Use of oxygen as the pressurized gas may cause an explosion 2 Charging with R32 gas will lead the composition of the remaining refrigerant in the cylinder to change and then this refrigerant can not be used Vacuuming 1 Vacuum pump with check valve A vacuum pump with a check valve is required to prevent the vacuum pump oil from flowing back into the refrigerant circuit when the vacuum pump power is turned off power failure It is also possible to attach a check valve to the actual vacuum pump afterwards 2 Standard degree of vacuum for the vacuum pump Use a pump which reaches 65Pa or below after 5 minutes of operation In addition be sure to use a vacuum pump that has been properly maintained and oiled using the specified oil If the vacuum pump is not properly maintained the degree of vacuum may be too low 3 Required accuracy of the vacuum gauge Use a vacuum gauge that can measure up to 650Pa Do not use a general gauge manifold since it cannot measure a vacuum of 650Pa 4 Evacuating time Evacuate the equipment for 1 hour after 650Pa has been reached After envacuating leave the equipment for 1 hour and make sure the that vacuum is not lost 5 Operating procedure when the vacuum pump is stopped In order to prevent a backflow of the vacuum pump oil open the relief valve on the vacuum pump side or loosen the charge hose to drawn in air before stopping operation The same operating procedure should be used when using a vacuum pump with a check valve Charging Refrigerant R32 must be in a liquid state when charging Reasons R32 is a HFC refrigerant boiling point 52 C and can roughly be handled in the same way as R410A however be sure to fill the refrigerant from the liquid side for doing so from the gas side will somewhat change the composition of the refrigerant in the cylinder Note In the case of a cylinder with a syphon liquid R32 is charged without turning the cylinder up side down Check the type of cylinder before charging Remedies to be taken in case of a refrigerant leak When refrigerant leaks additional refrigerant may be charged Add the refrigerant from the liquid side Characteristics of the Conventional and the New Refrigerants Because R32 is a simulated azeotropic refrigerant it can be handled in almost the same mammer as a single refrigerant such as R22 Howerver if the refrigerant is removed in the vapor phase the composition of the refrigerant in the cylinder will somewhat change Remove the refrigerant in the liquid phase Additional refrigerant may be added in case of a refrigerant leak 19

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