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PRODUCT DATA Product Features and Benefits page 10 Unit Nomenclature page 12 General Data page 14 Electrical Data page 27 Water Source Unit Dimensions page 29 Heat Recovery Unit Dimensions page 32 Acoustic Data page 35 Head Loss by Water Flow page 52 Refrigerant Flow Diagrams page 53...
The VRF system component size selections should be acceptable. At any time, if further system design assistance is needed or you have a unique application you would like to discuss, contact your LG applied equipment representative for assistance.
LG Electronics, U.S.A., Inc. In all cases, the designer, installer, and contractor should understand if the suggested method is used, it is used at their own risk. LG Electronics U.S.A., Inc., takes no responsibility and offers no warranty, expressed or implied, of merchantability or fitness of purpose if this method fails to perform as stated or intended.
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Note: • Consult with LG Electronics, U.S.A., Inc. if the available space is less than shown. If water piping passes along the side of a frame, ensure the indicated space is available after considering the space taken by the piping.
Refrigerant Piping System Quality Assurance To ensure that the refrigerant piping design meets LG’s quality standards, a LATS refrigerant piping design software report must be provided with every Multi V Water IV order. Following the installation, if any changes or variations to the design were necessary, an “as-built” LATS piping design software report must be provided to LG prior to system commissioning.
Manual Layout Procedure Note: LG Electronics, Inc. recommends using LATS Multi V software for all system designs. To get the free LATS system design software, contact your local LG representative. Use this procedure only if you choose to perform system design manually.
Only LG supplied Y-branch fittings can be used to join one pipe segment to two or more segments. Third-party or field-fabricated Tee's, Y-fittings, Headers, or other branch fittings are not qualified for use with LG Multi V IV systems. The only field-provided fittings allowed in a Multi V IV piping system are 45°...
Refer to ASHRAE Standards 15 and 34. LG Multi V Water IV water source units ship from the factory with a charge of R410A refrigerant. This charge serves as the base charge and will not be sufficient for the system to operate. A trim charge based on system design must be added after system installation. LATS Multi V piping design software will calculate the size of the refrigerant piping and calculate the required refrigerant charge.
Use of field-supplied isolation valves that are not full-port, rated for R410A refrigerant, and rated for 550 psi may result in refrigerant leaks. LG allows installation of field-supplied ball valves with Schrader ports at each indoor unit. Full-port isolation ball valves with Schrader ports (positioned between valve and indoor unit) rated for use with R410A refrigerant should be used on both the liquid and vapor lines.
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Pipe Sleeves at Penetrations LG requires that all pipe penetrations through walls and floors be properly insulated and routed through an appropriate wall sleeve of sufficient size to prevent compression of refrigerant pipe insulation and free movement of the pipe within the sleeve.
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Mark all pipes at the point where the insulation jacket ends. Remove the jacket. Install field provided insulation on the run-out and main trunk pipes first. Install the LG-provided insulation plugs on the ends of all unused header ports. Peel the adhesive glue protector slip from the insulation jacket and install the clam-shell jacket over the fitting.
Water Source Unit Y-branch Kits for Heat Pump Systems • LG water source unit Y-branch fittings must be used with LG systems and be properly installed following the instructions in the applicable LG manual. Field-supplied branch fittings are not permitted.
Water Source Unit Y-branch Kits for Heat Recovery Systems • LG water source unit Y-branch fittings must be used with LG systems and be properly installed following the instructions in the appli- cable LG manual. Field-supplied branch fittings are not permitted.
DIP Switch Settings for Generation 4 Equipment Generation 4 Equipment The latest versions of LG’s indoor units and water source units are designated Generation 4 (Gen 4). For Gen 4 units to operate with Gen 4 features, the air conditioning system must meet the following requirements: •...
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Piping System Specifications Variable Water Flow Valve Control Kit PWFCKN000 (Optional) When entering water temperature is lower than 59ºF, variable water flow control kit PWFCKN000 is required. LG recommends installing a variable water flow control kit on each water source unit.
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Configuring Variable Water Flow Valve Control Kit for each WSU LG recommends installing a variable water flow valve control kit on each water source unit. Refer to Figure 75, Figure 76, and Figure 77 for single, dual, and triple frame configurations.
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20001747 ISO 9001: 2008 LG ELECTRONICS INC. LG Electronics LG Electronics Commercial Products Support EM_MultiV_WaterIV_5_16 Commercial Air Conditioning Division 1-888-865-3026 USA Supercedes: EM_MultiV_WaterIV_11_15 4300 Northpoint Parkway, Suite 100 Follow the prompts for commercial A/C products. Alpharetta, Georgia 30022 Supercedes: EM_MultiV_WaterIV_5_15 Supercedes: EM-MultiV_WaterIV-02-15 www.lghvac.com...
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