User manual LG LWM15

[. . . ] 31 33 36 36 37 38 E-2 Philippine RVXMHF040E_IM_E 31408_1. 12. 10. indd 2 2010-1-12 11:44:40 Safety Precautions You must install the product by qualified installer. If you install the product on your own or by unqualified person, Samsung is not responsible for any damages which may occur due to incorrect installation. Make sure to read the following safety precautions carefully before installation. Make sure to observe the cautions specified in this manual. [. . . ] Do not place a trap on the concentrated pipe. And install the drain pipe horizontally with a slope of 1/50 or more. Insulate the drain pipe and drain plug by using the insulation over 10mm. Install a self-regulation heat cable to prevent the drain pipe from freezing. Caution When Installing Cover for Heating Air Direction Change Parts shown in the picture is where the copper pipe may be passing by or the external plate may be near the copper pipe. When using screw for installing the air direction changing device such as heating air cover, check and make sure that it does not damage the copper pipe. E-13 < Internal view from bottom> Philippine RVXMHF040E_IM_E 31408_1. 12. 10. indd 13 2010-1-12 12:09:56 INSTALLING THE UNIT Installing the Refrigerant Pipe Work WARNING When installing, make sure there is no leakage. When recovering the refrigerant, ground the compressor first before removing the connection pipe. If the refrigerant pipe is not properly connected and the compressor works with the service valve open, the pipe inhales the air and it makes the pressure inside of the refrigerant cycle abnormally high. It may cause explosion and injury. Install the refrigerant pipe within the maximum allowable length, difference in height and length of after the first The pressure of the R410a is high. branch pipe. Use clean refrigerant pipe which there is no harmful ion, oxide, dust, iron content or moisture. Use tools and accessories fit on R410a. Use only rated refrigerant pipe and follow the installation method. Manifold gauge Vacuum pump Flare nut Use manifold gauge only for R410a to prevent the inflow of foreign substances. Use vacuum pump with check valve to prevent pump oil from flowing backward while the vacuum pump is stopped. Use the vacuum pump that the vacuum induction is available up to 5Torr (666, 6Pa, 5mmHg). Apply pressure using pressure regulator. Keep it for minimum 24 hours to check if the pressure drops. After applying Nitrogen gas, check the change of pressure using pressure regulator. If the pressure drops, check if there is gas leak. If the pressure is changed, apply soapy water to check the leak. Check the pressure of the Nitrogen gas again. Maintain 1, 0MPa of the pressure before performing vacuum drying and check further gas leak. After checking first gas leak, maintain 1, 0MPa to check further gas leak. Manifold gauge Low pressure side High pressure side Gas side pipe Pressure adjustment valve (mandatory) Liquid side pipe Nitrogen gas Service port CAUTION You may get injured when the joint on the high pressure side detaches and the gas comes in contact with your body. Make sure to tighten the joint to prevent such accidents. E-20 Philippine RVXMHF040E_IM_E 31408_1. 12. 10. indd 20 2010-1-12 11:45:47 INSTALLING THE UNIT Vacuum Drying Use the tools for R410a to prevent the inflow of foreign substances and resist Manifold gauge against the internal pressure. Use the vacuum pump with the check valve to prevent pump oil from flowing Low pressure side Gas side pipe backward while the vacuum pump is stopped. High pressure side Vacuum system to 5Torr (666, 6Pa, 5mmHg). Close the service valve of the liquid side pipe and gas side pipe completely. Connect the manifold gauge to the liquid side pipe and gas side pipe. Service port Vacuum pump Liquid side pipe Perform vacuum drying of the liquid side pipe and gas side pipe using the vacuum pump. Make sure that install check valve to prevent pump oil from flowing into the pipe. Perform vacuum drying for 2 hours and 30 minutes or more. The time of vacuum drying may differ depending on the length of the pipe or outdoor temperature. Perform vacuum drying for at least 2 hours and 30 minutes. Close the valve after checking the vacuum gauge pressure has reached at 5Torr. Check the vacuum pressure using the vacuum gauge. Check for gas leakage Yes Pressure Increase Since there is water in pipeline, the pressure increases and vacuum condition is broken. Exert pressure using 0, 05 MPa nitrogen. No Vacuum desiccate again, to reach 5Torr (666, 6Pa, 5mmHg). (2 hours and more) Fill refrigeration agent No Pressure Increase Yes E-21 Philippine RVXMHF040E_IM_E 31408_1. 12. 10. indd 21 2010-1-12 11:45:48 INSTALLING THE UNIT Installing the Refrigerant Pipe Work (Continued) Selecting Additional Refrigerant Charge Basic charge The basic amount of refrigerant for outdoor unit charged in factory is : Outdoor unit (Series) RVXMHF040B RVXMHF050B RVXMHF060B Factory charge(kg) 4, 0 4, 2 Charge additional refrigerant according to the total length of the pipe. Depends on the total length of the liquid side pipe. Additional Charge (g) = {(L1x20) + (L2x50)} L1: Total length of liquid pipe Ø 6, 35(m) L2: Total length of liquid pipe Ø 9, 52(m) Refrigerant Charging Additional charging Additional Refrigerant calculation only related with liquid pipe length Basic refrigerant for outdoor unit already has been charged Additional charge calculation = (Sum of total length(m) of 9, 52)x50g + (Sum of total length(m) of 6, 35)x20g ex) a(9, 52)=40m, b+c+d(9, 52)=15m, e+f+g(6, 35)=15m Additional charge = 55mx50g + 15mx20g = 3050g E-22 Philippine RVXMHF040E_IM_E 31408_1. 12. 10. indd 22 2010-1-12 12:01:09 INSTALLING THE UNIT Adding Refrigerant The R410a refrigerant is blended refrigerant. Measure the quantity of the refrigerant depending on the length of the liquid side pipe. Add fixed quantity of the refrigerant using a scale. Adding the cooling refrigerant Manifold gauge Outdoor unit Suction charging Low pressure side High pressure side Gas side Liquid side Scale Service valve Adding the heating refrigerant Manifold gauge Outdoor unit Suction charging Low pressure side High pressure side Gas side Liquid side Scale Service valve Connect the manifold gage and purge the manifold gage. Open the manifold gauge valve of the liquid side service valve and add the liquid refrigerant. If you cannot fully recharge the additional refrigerant while the outdoor unit is stopped, use the key on the outdoor unit PCB to recharge the remaining refrigerant. (Refer to page 32. ) Adding the cooling refrigerant 1) Press the function key for adding refrigerant in cooling mode. [. . . ] Is the place well-ventilated and ensures space for service? Check if the center of the indoor unit is ensured and it is installed horizontally. Is total number of connecting indoor units in the allowable range? Are the length and the difference between the refrigerant pipes within the allowable range? [. . . ]