User manual LG LWM15

[. . . ] Conduct a test run of the unit after installation and then explain all system functions to the owner. Follow IEC (International Electrotechnical Commission) standards for the power input and ISO (International Standards Organization) standards for input current. - When using R410a, moisture or foreign substances may affect to the capacity and reliability of the product. Safety precautions must be taken when installing the refrigerant pipe. [. . . ] Pay attention to waterproof and drainage of the concrete foundation where the outdoor unit is installed. (An ice road may form on the base surface in winter. ) Make up for wire mash or steel bar so that the outdoor unit is not damaged or broken when installing concrete foundation. When installing the outdoor units in same place simultaneously, install the H beam inside concrete foundation. (When installing a number of outdoor unit, you can install it on the concrete foundation. ) Install the H beam(150mm x 150mm x t10 : basic specification) to jut out from the concrete foundation. Install a square pad(t=20mm or more) to prevent vibration of the outdoor unit delivering to the base surface when installing the concrete for the outdoor unit. Place the outdoor unit on the H beam and fix it with the bolt, nut and washer. Outdoor unit Anchor bolt Nut, Spring washer 20mm Square pad 150 or more < When installing on the roof > Base mount construction A 75mm H beam A+10~20mm or more E-12 Philippine RVXMHF040E_IM_E 31408_1. 12. 10. indd 12 2010-1-12 11:45:38 PREPARING THE INSTALLATION Outdoor unit base mount and anchor bolt position Anchor bolt position (ø7, 4 holes ) (Unit : mm) CAUTION When tightening the anchor bolt Tighten the rubber washer to prevent the outdoor unit bolt connection part from corroding. Iron washer Rubber washer Installing the drain pipe When installing 1 outdoor unit Outdoor unit (Rear side) Open to air Drain plug Drain plug More than 1/50 slope Drain pipe covered with insulation When installing more than 1 outdoor unit Outdoor unit (Rear side) Outdoor unit (Rear side) Outdoor unit (Rear side) Open to air Insulation More than 1/50 slope Drain pipe Open the upside of connected parts of outdoor units to prevent inner pressure. 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. Adjust the flow rate of the replacement with a pressure regulator to maintain 0, 05m3 /h or more. Perform brazing of the service valve after protecting the valve. Installing the Y-Joint Install the Y-joint `horizontally' or `vertically'. < Install horizontally> < Install vertically> CAUTION Make certain of a minimum distance in straight line. Rear To other branching pipe or indoor unit Pipe in use Pipe in use on the site Front To outdoor unit Socket on the site Rear Gas/Liquid side Y-joint Maintain ±15° start from the horizontal line Install the Y-joint within ±15° from Main pipe 500mm or more the horizontal or vertical line. E-18 Philippine RVXMHF040E_IM_E 31408_1. 12. 10. indd 18 2010-1-12 11:57:45 INSTALLING THE UNIT Connecting the Outdoor Unit Pipe Conduct a pipe work within maximum allowable length, height and length after branching. Make sure to have no crack on the bended parts of pipe. 4HP ~ 5HP Outdoor unit Gas side Liquid side 6HP Outdoor unit Gas side Provided Liquid side Pipe for 6HP outdoor unit is supplied with other accessories. E-19 Philippine RVXMHF040E_IM_E 31408_1. 12. 10. indd 19 2010-1-12 11:45:47 INSTALLING THE UNIT Installing the Refrigerant Pipe Work (Continued) Performing the Refrigerant Gas Leak Test Use tools for R410a to prevent the inflow of foreign substances and resist against the internal pressure. Pressure test with dry Nitrogen gas only. Apply pressure to the liquid side pipe and gas side pipe with Nitrogen gas of 4, 1MPa. If you apply pressure more than 4, 1MPa, the pipes may be damaged. 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. [. . . ] Then, open the valve on the refrigerant vessel for the refrigerant to flow from the liquid side pipe to a vessel. When desire amount of the refrigerant is collected on the vessel, close the valve and remove the manifold gauge. Make sure that the amount of the refrigerant in the vessel is about 50% of the entire system. Measure the amount of refrigerant correctly to not exceed amount of collected refrigerant. Outdoor unit 5 6 7 8 Gas side R410a Refrigerant vessel valve Valve Liquid side Valve Scale Manifold gauge Service valve E-34 Philippine RVXMHF040E_IM_E 31408_1. 12. 10. indd 34 2010-1-12 11:45:58 COMPLETING THE INSTALLATION When refrigerant recovery is difficult due to the large amount of refrigerant 1 2 Prepare manifold gauge, scale and an empty refrigerant vessel. [. . . ]